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Subject[PATCH] [ANNOUNCE] kconfig: Kconfiglib: a flexible Python Kconfig parser
Hi,

This is the initial release of Kconfiglib: a Python library for
scripting, debugging, and extracting information from Kconfig-based
configuration systems. It can be used to programmatically generate a
.config when the '*conf' tools are too inflexible, to quickly find out
interesting information about a Kconfig configuration such as dependency
relations between symbols and where undefined symbols are referenced,
and in applications that need to parse and extract information from
Kconfig files.

For a much longer introduction including multiple examples, see
arch/kconfig/kconfiglib.py.

Have fun!

Signed-off-by: Ulf Magnusson <ulfalizer.lkml@gmail.com>
---
Convenience links:
Documentation, generated from kconfiglib.py with pydoc -w:
http://dl.dropbox.com/u/10406197/kconfiglib.html

Examples as separate files:
http://dl.dropbox.com/u/10406197/kconfiglib-examples.tar.gz


The patch should be preferably be applied to a recent kernel, i.e. Linus's
(2.6.38-rc3 at the time of writing). Due to recent Kconfig changes, the
kconfigtest.py test suite - which compares output character-for-character -
will indicate failure on older (a few months old) kernels versions even though
the outputs are functionally equivalent.

Documentation/kbuild/kconfig-language.txt | 5 +
Documentation/kbuild/kconfig.txt | 8 +
README | 13 +
scripts/kconfig/Makefile | 26 +-
scripts/kconfig/kconfiglib.py | 3918 +++++++++++++++++++++++++++++
scripts/kconfig/kconfigtest.py | 396 +++
6 files changed, 4365 insertions(+), 1 deletions(-)
create mode 100644 scripts/kconfig/kconfiglib.py
create mode 100644 scripts/kconfig/kconfigtest.py
diff --git a/Documentation/kbuild/kconfig-language.txt b/Documentation/kbuild/kconfig-language.txt
index b507d61..63d63ba 100644
--- a/Documentation/kbuild/kconfig-language.txt
+++ b/Documentation/kbuild/kconfig-language.txt
@@ -381,3 +381,8 @@ config FOO

limits FOO to module (=m) or disabled (=n).

+Kconfiglib
+~~~~~~~~~~
+If you need to programmatically generate a .config or parse Kconfig files,
+Kconfiglib might come handy. See 'scriptconfig' and 'iscriptconfig' in
+'make help' and scripts/kconfig/kconfiglib.py.
diff --git a/Documentation/kbuild/kconfig.txt b/Documentation/kbuild/kconfig.txt
index cca46b1..73cf58f 100644
--- a/Documentation/kbuild/kconfig.txt
+++ b/Documentation/kbuild/kconfig.txt
@@ -195,4 +195,12 @@ Searching in gconfig:
however, gconfig does have a few more viewing choices than
xconfig does.

+======================================================================
+scriptconfig
+--------------------------------------------------
+
+If you need to programmatically generate a .config or parse Kconfig files,
+Kconfiglib might come handy. See 'scriptconfig' and 'iscriptconfig' in
+'make help' and scripts/kconfig/kconfiglib.py.
+
###
diff --git a/README b/README
index 1b81d28..bb5e68f 100644
--- a/README
+++ b/README
@@ -196,6 +196,19 @@ CONFIGURING the kernel:
values to 'n' as much as possible.
"make randconfig" Create a ./.config file by setting symbol
values to random values.
+ "make scriptconfig SCRIPT=<path to script>" Run a Kconfiglib
+ script (see scripts/kconfig/kconfiglib.py). This
+ can be used to programatically generate a
+ ./.config, and for applications that need to
+ extract information from Kconfig files.
+ "make iscriptconfig" Launch an interactive Python shell
+ for running Kconfiglib on the architecture's
+ Kconfig configuration. The kconfiglib and sys
+ (for sys.argv[1] - the base Kconfig file) modules
+ will be imported automatically, and a Config
+ instance 'c' will be created for the architecture
+ (using c = kconfiglib.Config(sys.argv[1])).
+

You can find more information on using the Linux kernel config tools
in Documentation/kbuild/kconfig.txt.
diff --git a/scripts/kconfig/Makefile b/scripts/kconfig/Makefile
index 368ae30..cfffe87 100644
--- a/scripts/kconfig/Makefile
+++ b/scripts/kconfig/Makefile
@@ -3,7 +3,7 @@
# These targets are used from top-level makefile

PHONY += oldconfig xconfig gconfig menuconfig config silentoldconfig update-po-config \
- localmodconfig localyesconfig
+ localmodconfig localyesconfig scriptconfig iscriptconfig kconfiglibtestconfig

ifdef KBUILD_KCONFIG
Kconfig := $(KBUILD_KCONFIG)
@@ -33,6 +33,28 @@ silentoldconfig: $(obj)/conf
$(Q)mkdir -p include/generated
$< --$@ $(Kconfig)

+ifneq ($(filter scriptconfig iscriptconfig,$(MAKECMDGOALS)),)
+PYTHONCMD ?= python
+endif
+
+scriptconfig:
+ $(Q)if [ ! -n "$(SCRIPT)" ]; then \
+ echo 'No script argument provided; use "make scriptconfig SCRIPT=<path to script>".'; \
+ else \
+ PYTHONPATH="$(obj):$$PYTHONPATH" "$(PYTHONCMD)" "$(SCRIPT)" "$(Kconfig)"; \
+ fi
+
+iscriptconfig:
+ $(Q)PYTHONPATH="$(obj):$$PYTHONPATH" "$(PYTHONCMD)" -i -c \
+ "import kconfiglib; \
+ import sys; \
+ c = kconfiglib.Config(sys.argv[1]); \
+ print \"A Config instance 'c' for the architecture ({0}) has been created.\".format(c.get_arch())" "$(Kconfig)"
+
+# Used by kconfigtest.py to prevent an 'option defconfig' .config from being loaded
+kconfiglibtestconfig: $(obj)/conf
+ $(Q)$< --defconfig=.config $(Kconfig)
+
# if no path is given, then use src directory to find file
ifdef LSMOD
LSMOD_F := $(LSMOD)
@@ -139,6 +161,8 @@ help:
@echo ' randconfig - New config with random answer to all options'
@echo ' listnewconfig - List new options'
@echo ' oldnoconfig - Same as silentoldconfig but set new symbols to n (unset)'
+ @echo ' scriptconfig - Run a kconfiglib script (see scripts/kconfig/kconfiglib.py)'
+ @echo ' iscriptconfig - Launch interactive Python shell for using kconfiglib'

# lxdialog stuff
check-lxdialog := $(srctree)/$(src)/lxdialog/check-lxdialog.sh
diff --git a/scripts/kconfig/kconfiglib.py b/scripts/kconfig/kconfiglib.py
new file mode 100644
index 0000000..84e70c3
--- /dev/null
+++ b/scripts/kconfig/kconfiglib.py
@@ -0,0 +1,3918 @@
+# This is Kconfiglib, a Python library for scripting, debugging, and extracing
+# information from Kconfig-based configuration systems. To view the
+# documentation, run
+#
+# $ pydoc kconfiglib
+#
+# or, if you prefer HTML,
+#
+# $ pydoc -w kconfiglib
+#
+# By Ulf "Ulfalizer" Magnusson.
+
+"""
+Kconfiglib is a Python library for scripting, debugging, and extracting
+information from Kconfig-based configuration systems. Features include the
+following:
+
+ - Symbol values and properties can be looked up and values assigned
+ programmatically.
+ - .config files can be read and written.
+ - Expressions can be evaluated in the context of a Kconfig configuration.
+ - Relations between symbols can be quickly determined, such as finding all
+ symbols that reference a particular symbol.
+ - Symbol values are automatically cached and reevaluated only when needed.
+ - Highly compatible with the C Kconfig implementation:
+ * Generates a .config file that is character-for-character identical (modulo
+ header) to the one generated by the C implementation (mconf) when fed each
+ architecture/defconfig pair in the kernel and asked to generate a
+ configuration. This includes nonsensical pairings such as powerpc with
+ arch/x86/configs/x86_64_defconfig, for a total of 9096 combinations as of
+ Linux 2.6.38-rc3.
+ * Also generates a .config that is character-for-character identical to the
+ one generated by mconf for all architectures when no .config is supplied.
+ * The 'make allyesconfig' and 'make allnoconfig' implementations below
+ generate output character-for-character identical to the C implementation
+ for all architectures.
+
+ See scripts/kconfig/kconfigtest.py for the Kconfiglib test suite.
+
+For the Linux kernel, scripts should be run with
+
+$ make scriptconfig SCRIPT=<path to script>
+
+to ensure that the environment (SRCARCH, ARCH, and KERNELVERSION) is set up
+correctly. Alternative architectures can be specified like for other 'make
+*config' targets:
+
+$ make scriptconfig ARCH=mips SCRIPT=<path to script>
+
+The script will receive the name of the Kconfig file to load in sys.argv[1] (as
+of Linux 2.6.38-rc3 this is always "Kconfig" from the kernel top-level
+directory).
+
+To get an interactive Python prompt with Kconfiglib preloaded, use
+
+$ make iscriptconfig ARCH=<architecture>
+
+Kconfiglib requires Python 2. For (i)scriptconfig the command to run the Python
+interpreter can be passed in the environment variable PYTHONCMD (defaults to
+'python').
+
+Learning to use the library is probably easiest by looking at a few examples,
+reading the documentation, and experimenting. The API is designed to be
+intuitive and easy to use.
+
+===============================================================================
+Example 1: loading a configuration and a .config and printing information about
+a symbol.
+
+import kconfiglib
+import sys
+
+# Create a Config object representing a Kconfig configuration (any number of
+# these can be created -- the library has no global state).
+conf = kconfiglib.Config(sys.argv[1])
+
+# Load values from a .config file.
+conf.load_config("arch/x86/configs/i386_defconfig")
+
+# Print some information about a symbol (the Config class implements
+# __getitem__() to provide a handy syntax for getting symbols).
+print conf["SERIAL_UARTLITE_CONSOLE"]
+
+Output for ARCH=i386:
+Symbol SERIAL_UARTLITE_CONSOLE
+Type : bool
+Value : "n"
+User value : (no user value)
+Visibility : "n"
+Is choice item : false
+Is defined : true
+Is from env. : false
+Is special : false
+Prompts:
+ "Support for console on Xilinx uartlite serial port" if SERIAL_UARTLITE = y (value: "n")
+Default values:
+ (no default values)
+Selects:
+ SERIAL_CORE_CONSOLE if SERIAL_UARTLITE = y (value: "n")
+Reverse dependencies:
+ (no reverse dependencies)
+Additional dependencies from enclosing menus and if's:
+ HAS_IOMEM (value: "y")
+Locations: drivers/serial/Kconfig:913
+
+===============================================================================
+Example 2: evaluate an expression in the context of a configuration (here we
+ could load a .config as well).
+
+import kconfiglib
+import sys
+
+conf = kconfiglib.Config(sys.argv[1])
+print conf.eval("(TRACE_IRQFLAGS_SUPPORT || PPC32) && STACKTRACE_SUPPORT")
+
+Output for ARCH=mips:
+y
+
+===============================================================================
+Example 3: print the names of all symbols that are referenced but never defined
+ in the current configuration together with the locations where they
+ are referenced. Integers being included in the list is not a bug, as
+ these need to be treated as symbols per the design of Kconfig.
+
+import kconfiglib
+import sys
+
+conf = kconfiglib.Config(sys.argv[1])
+
+for sym in conf.get_symbols():
+ if not sym.is_defined():
+ print sym.get_name()
+ for (filename, linenr) in sym.get_ref_locations():
+ print " {0}:{1}".format(filename, linenr)
+
+Output for ARCH=i386:
+MACH_NET2BIG_V2
+ drivers/leds/Kconfig:365
+MACH_OMAP3517EVM
+ sound/soc/omap/Kconfig:84
+ARCH_OMAP16XX
+ drivers/pcmcia/Kconfig:271
+ drivers/char/hw_random/Kconfig:117
+ drivers/watchdog/Kconfig:210
+ drivers/rtc/Kconfig:694
+SOC_JZ4740
+ sound/soc/codecs/Kconfig:30
+MACH_AT91SAM9261EK
+ drivers/video/Kconfig:1055
+PPC_83xx
+ drivers/mtd/nand/Kconfig:463
+ drivers/watchdog/Kconfig:951
+ drivers/usb/Kconfig:58
+ drivers/edac/Kconfig:221
+PPC_PSERIES
+ init/Kconfig:999
+ drivers/pci/hotplug/Kconfig:146
+ drivers/scsi/Kconfig:964
+ drivers/scsi/Kconfig:975
+ drivers/scsi/Kconfig:989
+ drivers/net/Kconfig:1353
+ drivers/serial/Kconfig:1261
+ drivers/char/Kconfig:628
+ drivers/char/Kconfig:712
+ drivers/char/Kconfig:729
+... (lots more)
+
+===============================================================================
+Example 4: print the names of all symbols that reference a particular symbol
+ (there's also a method get_selected_symbols() for determining
+ just selection relations).
+
+import kconfiglib
+import sys
+
+conf = kconfiglib.Config(sys.argv[1])
+
+x86 = conf["X86"]
+for sym in conf:
+ if x86 in sym.get_referenced_symbols():
+ print sym.get_name()
+
+Output for ARCH=i386:
+AUDITSYSCALL
+PCSPKR_PLATFORM
+OPROFILE_EVENT_MULTIPLEX
+GCOV_PROFILE_ALL
+SCHED_OMIT_FRAME_POINTER
+MEMORY_HOTPLUG
+PM_TRACE_RTC
+ACPI
+ACPI_AC
+ACPI_BATTERY
+ACPI_VIDEO
+ACPI_PROCESSOR_AGGREGATOR
+ACPI_NUMA
+X86_PM_TIMER
+ACPI_SBS
+ACPI_APEI
+ACPI_APEI_GHES
+INTEL_IDLE
+XEN_PCIDEV_FRONTEND
+EISA_VLB_PRIMING
+EISA_VIRTUAL_ROOT
+HOTPLUG_PCI_COMPAQ
+HOTPLUG_PCI_IBM
+HOTPLUG_PCI_CPCI_ZT5550
+HOTPLUG_PCI_CPCI_GENERIC
+MTD_SC520CDP
+... (lots more)
+
+===============================================================================
+Example 5: print a tree of all items in the configuration.
+
+import kconfiglib
+import sys
+
+def print_with_indent(s, indent):
+ print (" " * indent) + s
+
+def print_items(items, indent):
+ for item in items:
+ if item.is_symbol():
+ print_with_indent("config {0}".format(item.get_name()), indent)
+ elif item.is_menu():
+ print_with_indent('menu "{0}"'.format(item.get_title()), indent)
+ print_items(item.get_items(), indent + 2)
+ elif item.is_choice():
+ print_with_indent('choice', indent)
+ print_items(item.get_items(), indent + 2)
+ elif item.is_comment():
+ print_with_indent('comment "{0}"'.format(item.get_text()), indent)
+
+conf = kconfiglib.Config(sys.argv[1])
+print_items(conf.get_top_level_items(), 0)
+
+Output for ARCH=i386:
+...
+config ARCH
+config KERNELVERSION
+config CONSTRUCTORS
+config HAVE_IRQ_WORK
+config IRQ_WORK
+menu "General setup"
+ config EXPERIMENTAL
+ config BROKEN
+ config BROKEN_ON_SMP
+ config LOCK_KERNEL
+ config INIT_ENV_ARG_LIMIT
+ config CROSS_COMPILE
+ config LOCALVERSION
+ config LOCALVERSION_AUTO
+ config HAVE_KERNEL_GZIP
+ config HAVE_KERNEL_BZIP2
+ config HAVE_KERNEL_LZMA
+ config HAVE_KERNEL_XZ
+ config HAVE_KERNEL_LZO
+ choice
+ config KERNEL_GZIP
+ config KERNEL_BZIP2
+ config KERNEL_LZMA
+ config KERNEL_XZ
+ config KERNEL_LZO
+ config SWAP
+ config SYSVIPC
+ config SYSVIPC_SYSCTL
+ config POSIX_MQUEUE
+ config POSIX_MQUEUE_SYSCTL
+ config BSD_PROCESS_ACCT
+ config BSD_PROCESS_ACCT_V3
+...
+
+===============================================================================
+Example 6: this does the same thing as entering "make menuconfig" and
+ immediately saving and exiting.
+
+import kconfiglib
+import os
+import sys
+
+conf = kconfiglib.Config(sys.argv[1])
+
+if os.path.exists(".config"):
+ conf.load_config(".config")
+else:
+ defconfig = conf.get_defconfig_filename()
+ if defconfig is not None:
+ print "Using " + defconfig
+ conf.load_config(defconfig)
+
+conf.write_config(".config")
+
+===============================================================================
+Example 7: as a more complex example, this is a reimplementation of allnoconfig
+ (verified to produce identical output to 'make allnoconfig' for all
+ ARCHes). The looping is done in case setting one symbol to "n"
+ allows other symbols to be set to "n" (due to dependencies).
+
+import kconfiglib
+import sys
+
+conf = kconfiglib.Config(sys.argv[1])
+
+while True:
+ done = True
+
+ for sym in conf:
+ # Choices take care of themselves for allnoconfig, so we only need to
+ # worry about non-choice symbols
+ if not sym.is_choice_item():
+ lower_bound = sym.get_lower_bound()
+
+ # If we can assign a lower value to the symbol (where "n", "m" and
+ # "y" are ordered from lowest to highest), then do so.
+ # lower_bound() returns None for symbols whose values cannot
+ # (currently) be changed, as well as for non-bool, non-tristate
+ # symbols.
+ if lower_bound is not None and \\
+ kconfiglib.tri_less(lower_bound, sym.calc_value()):
+
+ sym.set_value(lower_bound)
+
+ # We just changed the value of some symbol. As this may effect
+ # other symbols, keep going.
+ done = False
+
+ if done:
+ break
+
+conf.write_config(".config")
+
+===============================================================================
+Example 8: here's allyesconfig (also verified), which is a bit more involved
+ as we need to handle choices in two different modes ("y", i.e.
+ one-is-y-rest-is-n, and "m", i.e.
+ any-number-of-symbols-are-m-rest-are-n). The looping is in case
+ setting one symbol to "y" (or "m") allows the value of other symbols
+ to be raised.
+
+import kconfiglib
+import sys
+
+conf = kconfiglib.Config(sys.argv[1])
+
+# Get a list of all symbols that are not in choices
+non_choice_syms = [sym for sym in conf.get_symbols() if
+ not sym.is_choice_item()]
+
+while True:
+ done = True
+
+ # Handle symbols outside of choices
+
+ for sym in non_choice_syms:
+ upper_bound = sym.get_upper_bound()
+
+ # See corresponding comment for allnoconfig implementation
+ if upper_bound is not None and \\
+ kconfiglib.tri_less(sym.calc_value(), upper_bound):
+ sym.set_value(upper_bound)
+ done = False
+
+ # Handle symbols within choices
+
+ for choice in conf.get_choices():
+
+ # Handle choices whose visibility allow them to be in "y" mode
+
+ if choice.get_visibility() == "y":
+ selection = choice.get_selection_from_defaults()
+ if selection is not None and \\
+ selection is not choice.get_user_selection():
+ selection.set_value("y")
+ done = False
+
+ # Handle choices whose visibility only allow them to be in "m" mode
+
+ elif choice.get_visibility() == "m":
+ for sym in choice.get_items():
+ if sym.calc_value() != "m" and \\
+ sym.get_upper_bound() != "n":
+ sym.set_value("m")
+ done = False
+
+
+ if done:
+ break
+
+conf.write_config(".config")
+
+
+Credits: written by Ulf "Ulfalizer" Magnusson
+
+Send bug reports, suggestions (any missing APIs that would make your life
+easier?) and other feedback to kconfiglib@gmail.com ."""
+
+# If you have Psyco installed (32-bit installations, Python <= 2.6 only),
+# setting this to True (right here, not at runtime) might give a nice speedup
+# (22% faster for parsing arch/x86/Kconfig and 58% faster for evaluating all
+# symbols in it without a .config on my Core Duo).
+use_psyco = False
+
+import os
+import re
+import string
+import sys
+
+class Config():
+
+ """Represents a Kconfig configuration."""
+
+ #
+ # Public interface
+ #
+
+ def __init__(self,
+ filename = "Kconfig",
+ base_dir = ".",
+ print_warnings = True,
+ print_undef_assign = False):
+ """Creates a new Config object, representing a Kconfig configuration.
+ Raises Kconfig_Syntax_Error on syntax errors.
+
+ filename (default: "Kconfig") -- The base Kconfig file of the
+ configuration. For the Linux kernel, this should usually be be
+ "Kconfig" from the top-level directory, as environment
+ variables will make sure the right Kconfig is included from
+ there (usually arch/<architecture/Kconfig). If you are using
+ kconfiglib via 'make scriptconfig' the filename of the
+ correct Kconfig will be in sys.argv[1].
+
+ base_dir (default: ".") -- The base directory relative to which
+ 'source' statements within Kconfig files will work. For Linux
+ this should be the top-level directory of the kernel tree.
+
+ print_warnings (default: True) -- Set to True if warnings related to
+ this configuration should be printed to stderr. This can
+ be changed later with Config.set_print_warnings(). It is
+ provided as a constructor argument since warnings might
+ be generated during parsing.
+
+ print_undef_assign (default: False) -- Set to True if informational
+ messages related to assignments to undefined symbols
+ should be printed to stderr for this configuration.
+ Can be changed later with
+ Config.set_print_undef_assign()."""
+
+ # The set of all symbols, indexed by name (a string)
+ self.syms = {}
+
+ # The set of all defined symbols in the configuration in the order they
+ # appear in the Kconfig files. This excludes the special symbols n, m,
+ # and y as well as symbols that are referenced but never defined.
+ self.kconfig_syms = []
+
+ # The set of all named choices (yes, choices can have names), indexed
+ # by name (a string)
+ self.named_choices = {}
+
+ def register_special_symbol(type, name, value):
+ sym = Symbol()
+ sym.is_special_ = True
+ sym.is_defined_ = True
+ sym.config = self
+ sym.name = name
+ sym.type = type
+ sym.cached_value = value
+ self.syms[name] = sym
+
+ # The special symbols n, m and y, used as shorthand for "n", "m" and
+ # "y"
+ register_special_symbol(TRISTATE, "n", "n")
+ register_special_symbol(TRISTATE, "m", "m")
+ register_special_symbol(TRISTATE, "y", "y")
+
+ self.m = self.syms["m"]
+
+ # Maps a symbol to its directly dependent symbols (any symbol whose
+ # prompt, default value or reverse dependency expressions directly
+ # depend on the symbol)
+ self.dep = {}
+
+ # The symbol with "option defconfig_list" set, containing a list of
+ # default .config files
+ self.defconfig_sym = None
+
+ # See Symbol.get_arch()
+ self.arch = os.environ.get("ARCH")
+
+ self.filename = filename
+ self.base_dir = _strip_trailing_slash(base_dir)
+
+ # The 'mainmenu' text
+ self.mainmenu_text = None
+
+ # The filename of the most recently loaded .config file
+ self.config_filename = None
+
+ # The textual header of the most recently loaded .config, uncommented
+ self.config_header = None
+
+ self.print_warnings = print_warnings
+ self.print_undef_assign = print_undef_assign
+
+ # Lists containing all choices, menus and comments in the configuration
+
+ self.choices = []
+ self.menus = []
+ self.comments = []
+
+ # For parsing routines that stop when finding a line belonging to a
+ # different construct, these holds that line and the tokenized version
+ # of that line. The purpose is to avoid having to retokenize the line,
+ # which is inefficient and causes problems when recording references to
+ # symbols.
+ self.end_line = None
+ self.end_line_tokens = None
+
+ # See the comment in _parse_expr().
+ self.parse_expr_cur_sym_or_choice = None
+ self.parse_expr_line = None
+ self.parse_expr_filename = None
+ self.parse_expr_linenr = None
+ self.parse_expr_transform_m = None
+
+ # Parse the Kconfig files
+ self.top_block = self._parse_file(filename, None, None, None)
+
+ # Build self.dep
+ self._build_dep()
+
+ def load_config(self, filename, reset = True):
+ """Loads symbol values from a file in the familiar .config format.
+
+ filename -- The .config file to load.
+
+ reset (default: True) -- True if the configuration should replace
+ the old configuration; False if it should add to it."""
+
+ def warn_override(filename, linenr, name, old_user_val, new_user_val):
+ self._warn("overriding the value of {0}. "
+ 'Old value: "{1}", new value: "{2}".'
+ .format(name, old_user_val, new_user_val),
+ filename,
+ linenr)
+
+ # Put this first so that a missing file doesn't screw up our state
+ line_feeder = _FileFeed(_get_lines(filename), filename)
+
+ self.config_filename = filename
+
+ if reset:
+ self.reset()
+
+ # Invalidate everything. This is usually faster than finding the
+ # minimal set of symbols that needs to be invalidated, as nearly all
+ # symbols will tend to be affected anyway.
+ self._invalidate_all()
+
+ # Read header
+
+ self.config_header = None
+
+ def is_header_line(line):
+ return line.startswith("#") and \
+ not re.match(unset_re, line)
+
+ first_line = line_feeder.get_next()
+
+ if first_line is None:
+ return
+
+ if not is_header_line(first_line):
+ line_feeder.go_back()
+ else:
+ self.config_header = first_line[1:]
+
+ # Read remaining header lines
+ while True:
+ line = line_feeder.get_next()
+
+ if line is None:
+ break
+
+ if not is_header_line(line):
+ line_feeder.go_back()
+ break
+
+ self.config_header += line[1:]
+
+ # Remove trailing newline
+ if self.config_header.endswith("\n"):
+ self.config_header = self.config_header[:-1]
+
+ # Read assignments
+
+ filename = line_feeder.get_filename()
+
+ while True:
+ line = line_feeder.get_next()
+ if line is None:
+ return
+
+ linenr = line_feeder.get_linenr()
+
+ line = line.strip()
+
+ set_re_match = re.match(set_re, line)
+ if set_re_match:
+ name, val = set_re_match.groups()
+ val = _strip_quotes(val, line, filename, linenr)
+ if name in self.syms:
+ sym = self.syms[name]
+
+ old_user_val = sym.get_user_value()
+ if old_user_val is not None:
+ warn_override(filename, linenr, name, old_user_val, val)
+
+ if sym.is_choice_item():
+ user_mode = sym.get_parent()._get_user_mode()
+ if user_mode is not None and user_mode != val:
+ self._warn("assignment to {0} changes mode of containing "
+ 'choice from "{1}" to "{2}".'
+ .format(name, val, user_mode),
+ filename,
+ linenr)
+
+ sym._set_value_no_invalidate(val, True)
+
+ else:
+ self._undef_assign('attempt to assign the value "{0}" to the '
+ "undefined symbol {1}."
+ .format(val, name),
+ filename,
+ linenr)
+ continue
+
+ unset_re_match = re.match(unset_re, line)
+ if unset_re_match:
+ name = unset_re_match.group(1)
+ if name in self.syms:
+ sym = self.syms[name]
+
+ old_user_val = sym.get_user_value()
+ if old_user_val is not None:
+ warn_override(filename, linenr, name, old_user_val, "n")
+
+ sym._set_value_no_invalidate("n", True)
+
+ def write_config(self, filename, header = None):
+ """Writes out symbol values in the familiar .config format.
+
+ filename -- The filename under which to save the configuration.
+
+ header (default: None) -- A textual header that will appear at the
+ beginning of the file, with each line commented out
+ automatically. None means no header."""
+
+ # already_written is set when _make_conf() is called on a symbol, so
+ # that symbols defined in multiple locations only get one entry in the
+ # .config. We need to reset it prior to writing out a new .config.
+ for sym in self.syms.itervalues():
+ sym.already_written = False
+
+ with open(filename, "w") as f:
+ # Write header
+ if header is not None:
+ f.write(_comment(header))
+ f.write("\n")
+
+ # Write configuration
+ f.write("\n".join(self.top_block._make_conf()))
+ f.write("\n")
+
+ def get_kconfig_filename(self):
+ """Returns the name of the (base) kconfig file this configuration was
+ loaded from."""
+ return self.filename
+
+ def get_arch(self):
+ """Mostly Linux specific. Returns the value the environment variable
+ ARCH had at the time the Config instance was created, or None if ARCH
+ was not defined. This corresponds to the architecture, with values such
+ as "i386" or "mips"."""
+ return self.arch
+
+ def get_mainmenu_text(self):
+ """Returns the text of the 'mainmenu' statement (with environment
+ variables expanded to the value they had when the Config was created),
+ or None if the configuration has no 'mainmenu' statement."""
+ return self.mainmenu_text
+
+ def get_defconfig_filename(self):
+ """Returns the name of the defconfig file, which is the first
+ existing file in the list given in a symbol having 'option
+ defconfig_list' set. $-references to environment variables will be
+ expanded. Returns None in case of no defconfig file. Setting 'option
+ defconfig_list' on multiple symbols currently results in undefined
+ behavior."""
+
+ if self.defconfig_sym is None:
+ return None
+
+ for (filename, cond_expr) in self.defconfig_sym.def_exprs:
+ cond_val = self._eval_expr(cond_expr)
+ if cond_val == "y":
+ f = os.path.expandvars(filename)
+ if os.path.exists(f):
+ return f
+
+ return None
+
+ def get_symbol(self, name):
+ """Returns the symbol with name 'name', or None if no such symbol
+ appears in the configuration. An alternative shorthand is conf[name],
+ where conf is a Config instance, though that will instead raise
+ KeyError if the symbol does not exist."""
+ return self.syms.get(name)
+
+ def get_top_level_items(self):
+ """Returns a list containing the items (symbols, menus, choice
+ statements and comments) at the top level of the configuration -- that
+ is, all items that do not appear within a menu or choice. The items
+ appear in the same order as within the configuration."""
+ return self.top_block.get_items()
+
+ def get_symbols(self, all_symbols = True):
+ """Returns a list of symbols from the configuration. An alternative for
+ iterating over all defined symbols (in the order of definition) is
+
+ for sym in config:
+ ...
+
+ which relies on Config implementing __iter__() and is equivalent to
+
+ for sym in config.get_symbols(False):
+ ...
+
+ all_symbols (default: True) -- If True, all symbols - including special
+ and undefined symbols - will be included in the result, in
+ an undefined order. If False, only symbols actually defined
+ and not merely referred to in the configuration will be
+ included in the result, and will appear in the order that
+ they are defined within the Kconfig configuration files."""
+ return self.syms.values() if all_symbols else self.kconfig_syms
+
+ def get_choices(self):
+ """Returns a list containing all choice statements in the
+ configuration, in the order they appear in the Kconfig files."""
+ return self.choices
+
+ def get_menus(self):
+ """Returns a list containing all menus in the configuration, in the
+ order they appear in the Kconfig files."""
+ return self.menus
+
+ def get_comments(self):
+ """Returns a list containing all comments in the configuration, in the
+ order they appear in the Kconfig files."""
+ return self.comments
+
+ def eval(self, s, transform_m = False):
+ """Returns the value of the expression 's' -- where 's' is represented
+ as a string -- in the context of the configuration. Raises
+ Kconfig_Syntax_Error if syntax errors are detected in 's'.
+
+ For example, if FOO and BAR are tristate symbols at least
+ one of which has the value "y", then
+ config.eval("y && (FOO || BAR)") => "y"
+
+ Note that this functions always yields a tristate value. To get the
+ value of non-bool, non-tristate symbols, use calc_value().
+
+ transform_m (default: False) --
+ Within conditional expressions (those following e.g. 'if' and
+ 'depends on') "m" is rewritten as "m" && MODULES internally by the C
+ implementation and by kconfiglib, so that MODULES needs to be enabled
+ for the expression to be true. Pass True here if you want that to
+ happen; otherwise, pass False."""
+ return self._eval_expr(self._parse_expr(self._tokenize(s, False),
+ None,
+ s,
+ transform_m = transform_m))
+
+ def get_config_header(self):
+ """Returns the (uncommented) textual header of the .config file most
+ recently loaded with load_config(). Returns None if no .config file has
+ been loaded or if the most recently loaded .config file has no header.
+ The header comprises all lines up to but not including the first line
+ that either
+
+ 1. Does not start with "#"
+ 2. Has the form "# CONFIG_FOO is not set."
+ """
+ return self.config_header
+
+ def get_base_dir(self):
+ """Returns the base directory for 'source' statements, passed as an
+ argument to Config.__init__()."""
+ return self.base_dir
+
+ def set_print_warnings(self, print_warnings):
+ """Determines whether warnings related to this configuration (for
+ things like attempting to assign illegal values to symbols) should be
+ printed to stderr.
+
+ print_warnings -- True if warnings should be
+ printed, otherwise False."""
+ self.print_warnings = print_warnings
+
+ def set_print_undef_assign(self, print_undef_assign):
+ """Determines whether informational messages related to assignments to
+ undefined symbols should be printed to stderr for this configuration.
+
+ print_undef_assign -- If True, such messages will be printed."""
+ self.print_undef_assign = print_undef_assign
+
+ def __getitem__(self, key):
+ """Returns the symbol with name 'name'. Raises KeyError if the symbol
+ does not appear in the configuration."""
+ return self.syms[key]
+
+ def __iter__(self):
+ """Convenience function for iterating over the set of all defined
+ symbols in the configuration, used like
+
+ for sym in conf:
+ ...
+
+ The iteration happens in the order of definition within the Kconfig
+ configuration files. Symbols only referred to but not defined will not
+ be included, nor will the special symbols n, m, and y. If you want to
+ include such symbols as well, see config.get_symbols()."""
+ return iter(self.kconfig_syms)
+
+ def reset(self):
+ """Resets the values of all symbols, as if Config.load_config() or
+ Symbol.set_value() had never been called."""
+ for sym in self.syms.itervalues():
+ sym._reset_no_recursive_invalidate()
+
+ def __str__(self):
+ """Returns a string containing various information about the Config."""
+ return _sep_lines("Configuration",
+ "File : " + self.filename,
+ "Base directory : " + self.base_dir,
+ "Arch (value of ARCH at time of creation) : " + self.arch,
+ "Most recently loaded .config : " +
+ ("(no .config loaded)" if self.config_filename is None else
+ self.config_filename),
+ "Print warnings : " +
+ bool_str[self.print_warnings],
+ "Print assignments to undefined symbols : " +
+ bool_str[self.print_undef_assign])
+
+
+ #
+ # Private methods
+ #
+
+ def _invalidate_all(self):
+ for sym in self.syms.itervalues():
+ sym._invalidate()
+
+ def _tokenize(self,
+ s,
+ add_sym_if_not_exists = True,
+ filename = None,
+ linenr = None):
+ """Returns a _Feed instance containing tokens derived from the string
+ 's'. Registers any new symbols encountered (via _sym_lookup()).
+
+ (I experimented with a regular expression implementation, but it came
+ out 5% _slower_ and wouldn't have been as flexible).
+
+ add_sym_if_not_exists -- False when we do not want to register new
+ symbols, such as when called from
+ Config.eval()."""
+ tokens = []
+ previous = None
+
+ strlen = len(s)
+ append = tokens.append
+
+ # The current index in the string being tokenized
+ i = 0
+
+ while i < strlen:
+ c = s[i]
+
+ if c.isspace():
+ i += 1
+ continue
+
+ elif c == "=":
+ append(T_EQUAL)
+ i += 1
+
+ elif c == "!":
+ if i + 1 >= strlen:
+ _tokenization_error(s, strlen, filename, linenr)
+ if s[i + 1] == "=":
+ append(T_UNEQUAL)
+ i += 2
+ else:
+ append(T_NOT)
+ i += 1
+
+ elif c == "(":
+ append(T_OPEN_PAREN)
+ i += 1
+
+ elif c == ")":
+ append(T_CLOSE_PAREN)
+ i += 1
+
+ elif c == "&":
+ if i + 1 >= strlen:
+ _tokenization_error(s, strlen, filename, linenr)
+ if s[i + 1] != "&":
+ _tokenization_error(s, i + 1, filename, linenr)
+ append(T_AND)
+ i += 2
+
+ elif c == "|":
+ if i + 1 >= strlen:
+ _tokenization_error(s, strlen, filename, linenr)
+ if s[i + 1] != "|":
+ _tokenization_error(s, i + 1, filename, linenr)
+ append(T_OR)
+ i += 2
+
+ elif c == '"' or c == "'":
+ quote = c
+ value = ""
+ i += 1
+ while True:
+ if i >= strlen:
+ _tokenization_error(s, strlen, filename, linenr)
+ c = s[i]
+ if c == quote:
+ break
+ elif c == "\\":
+ if i + 1 >= strlen:
+ _tokenization_error(s, strlen, filename, linenr)
+ value += s[i + 1]
+ i += 2
+ else:
+ value += c
+ i += 1
+ i += 1
+ append(value)
+
+ elif c == "#":
+ break
+
+ else: # Symbol or keyword
+ name_start = i
+
+ # Locate the end of the symbol/keyword
+ i += 1
+ while i < strlen and s[i] in sym_chars:
+ i += 1
+
+ name = s[name_start:i]
+
+ keyword = keywords.get(name)
+
+ if keyword is not None:
+ append(keyword)
+ # What would ordinarily be considered a name is treated as a
+ # string after certain tokens.
+ elif previous in string_lex:
+ append(name)
+ else:
+ # We're dealing with a symbol. _sym_lookup() will take care
+ # of allocating a new Symbol instance if it's the first
+ # time we see it.
+ sym = self._sym_lookup(name, add_sym_if_not_exists)
+
+ if previous == T_CONFIG:
+ # If the previous token is T_CONFIG ("config"), we're
+ # tokenizing the first line of a symbol definition, and
+ # should remember this as a location where the symbol
+ # is defined.
+ sym.def_locations.append((filename, linenr))
+ else:
+ # Otherwise, it's a reference to the symbol
+ sym.ref_locations.append((filename, linenr))
+
+ append(sym)
+
+ previous = tokens[-1]
+
+ return _Feed(tokens)
+
+ #
+ # Parsing
+ #
+
+ # Expression grammar:
+ #
+ # <expr> -> <symbol>
+ # <symbol> '=' <symbol>
+ # <symbol> '!=' <symbol>
+ # '(' <expr> ')'
+ # '!' <expr>
+ # <expr> '&&' <expr>
+ # <expr> '||' <expr>
+
+ def _parse_expr(self,
+ feed,
+ cur_sym_or_choice,
+ line,
+ filename = None,
+ linenr = None,
+ transform_m = True):
+ """Parse an expression from the tokens in 'feed' using a simple
+ top-down approach. The result has the form (<operator>, <list
+ containing parsed operands>).
+
+ feed -- _Feed instance containing the tokens for the expression.
+
+ cur_sym_or_choice -- The symbol or choice currently being parsed, or
+ None if we're not parsing a symbol or choice.
+ Used for recording references to symbols.
+
+ line -- The line containing the expression being parsed.
+
+ filename (default: None) -- The file containing the expression.
+
+ linenr (default: None) -- The line number containing the expression.
+
+ transform_m (default: False) -- Determines if 'm' should be rewritten to
+ 'm && MODULES' -- see
+ parse_val_and_cond()."""
+
+ # Use instance variables to avoid having to pass these as arguments
+ # through the top-down parser in _parse_expr_2(), which is tedious and
+ # obfuscates the code. A profiler run shows no noticeable performance
+ # difference.
+ self.parse_expr_cur_sym_or_choice = cur_sym_or_choice
+ self.parse_expr_line = line
+ self.parse_expr_filename = filename
+ self.parse_expr_linenr = linenr
+ self.parse_expr_transform_m = transform_m
+
+ return self._parse_expr_2(feed)
+
+ def _parse_expr_2(self, feed):
+ or_terms = [self._parse_or_term(feed)]
+ # Keep parsing additional terms while the lookahead is '||'
+ while feed.check(T_OR):
+ or_terms.append(self._parse_or_term(feed))
+
+ if len(or_terms) == 1:
+ return or_terms[0]
+ else:
+ return (OR, or_terms)
+
+ def _parse_or_term(self, feed):
+ and_terms = [self._parse_factor(feed)]
+ # Keep parsing additional terms while the lookahead is '&&'
+ while feed.check(T_AND):
+ and_terms.append(self._parse_factor(feed))
+
+ if len(and_terms) == 1:
+ return and_terms[0]
+ else:
+ return (AND, and_terms)
+
+ def _parse_factor(self, feed):
+ if feed.check(T_OPEN_PAREN):
+ expr_parse = self._parse_expr_2(feed)
+
+ if not feed.check(T_CLOSE_PAREN):
+ _parse_error(self.parse_expr_line,
+ "missing end parenthesis.",
+ self.parse_expr_filename,
+ self.parse_expr_linenr)
+
+ return expr_parse
+
+ if feed.check(T_NOT):
+ return (NOT, self._parse_factor(feed))
+
+ sym_or_string = feed.get_next()
+
+ if not isinstance(sym_or_string, (Symbol, str)):
+ _parse_error(self.parse_expr_line,
+ "malformed expression.",
+ self.parse_expr_filename,
+ self.parse_expr_linenr)
+
+ if self.parse_expr_cur_sym_or_choice is not None and \
+ isinstance(sym_or_string, Symbol):
+ self.parse_expr_cur_sym_or_choice.referenced_syms.add(sym_or_string)
+
+ if feed.peek_next() not in (T_EQUAL, T_UNEQUAL):
+ if self.parse_expr_transform_m and (sym_or_string is self.m or
+ sym_or_string == "m"):
+ return (AND, ["m", self._sym_lookup("MODULES")])
+ return sym_or_string
+
+ relation = EQUAL if (feed.get_next() == T_EQUAL) else UNEQUAL
+ sym_or_string_2 = feed.get_next()
+
+ if sym_or_string is self.m:
+ sym_or_string = "m"
+
+ if sym_or_string_2 is self.m:
+ sym_or_string_2 = "m"
+
+ return (relation, sym_or_string, sym_or_string_2)
+
+ def _parse_file(self, filename, parent, deps, visible_if_deps):
+ """Parse the Kconfig file 'filename'. The result is
+ a _Block with all items from the file."""
+ line_feeder = _FileFeed(_get_lines(filename), filename)
+ return self._parse_block(line_feeder, None, parent, deps, visible_if_deps)
+
+ def _parse_block(self, line_feeder, end_marker, parent, deps, visible_if_deps = None):
+ """Parses a block, which is the contents of either a file or an if,
+ menu, or choice statement.
+
+ end_marker -- The token that ends the block, e.g. T_ENDIF ("endif") for
+ if's. None for files.
+
+ parent -- The enclosing menu, choice or if, or None if we're at the top
+ level.
+
+ deps -- Dependencies from enclosing menus, choices and if's.
+
+ visible_if_deps (default: None) -- 'visible if' dependencies from
+ enclosing menus."""
+
+ block = _Block()
+
+ filename = line_feeder.get_filename()
+
+ while True:
+
+ # Do we already have a tokenized line that we determined wasn't
+ # part of whatever we were parsing earlier? See comment in
+ # Config.__init__().
+ if self.end_line is not None:
+ assert self.end_line_tokens is not None
+ tokens = self.end_line_tokens
+ tokens.go_to_start()
+
+ line = self.end_line
+ linenr = line_feeder.get_linenr()
+
+ self.end_line = None
+ self.end_line_tokens = None
+
+ else:
+ line = line_feeder.get_next()
+ if line is None:
+ if end_marker is not None:
+ raise Kconfig_Syntax_Error, (
+ "Unexpected end of file {0}."
+ .format(line_feeder.get_filename()))
+ return block
+
+ linenr = line_feeder.get_linenr()
+
+ tokens = self._tokenize(line, True, filename, linenr)
+
+ if tokens.is_empty():
+ continue
+
+ t0 = tokens.get_next()
+
+ # Have we reached the end of the block?
+ if t0 == end_marker:
+ return block
+
+ elif t0 in (T_CONFIG, T_MENUCONFIG):
+ # The tokenizer will automatically allocate a new Symbol object
+ # for any new names it encounters, so we don't need to worry
+ # about that here.
+ sym = tokens.get_next()
+
+ # Symbols defined in multiple places get the parent of their
+ # first definition. However, for symbols whose parents are choice
+ # statements, the choice statement takes precedence.
+ if not sym.is_defined_ or isinstance(parent, Choice):
+ sym.parent = parent
+
+ sym.is_defined_ = True
+
+ self.kconfig_syms.append(sym)
+ block.add_item(sym)
+
+ self._parse_properties(line_feeder, sym, deps, visible_if_deps)
+
+ elif t0 == T_MENU:
+ menu = Menu()
+ menu.config = self
+ menu.parent = parent
+ menu.title = tokens.get_next()
+
+ menu.filename = filename
+ menu.linenr = linenr
+
+ # Parse properties and contents
+ self._parse_properties(line_feeder, menu, deps, visible_if_deps)
+ menu.block = self._parse_block(line_feeder,
+ T_ENDMENU,
+ menu,
+ menu.dep_expr,
+ self._make_and(visible_if_deps,
+ menu.visible_if_expr))
+
+ block.add_item(menu)
+ self.menus.append(menu)
+
+ elif t0 == T_IF:
+ # If statements are treated as syntactic sugar for adding
+ # dependencies to enclosed items and do not have an explicit
+ # object representation.
+
+ dep_expr = self._parse_expr(tokens, None, line, filename, linenr)
+ if_block = self._parse_block(line_feeder,
+ T_ENDIF,
+ parent,
+ self._make_and(dep_expr, deps),
+ visible_if_deps)
+
+ block.add_items_from_block(if_block)
+
+ elif t0 == T_CHOICE:
+ # We support named choices
+ already_defined = False
+ name = None
+ if len(tokens) > 1 and isinstance(tokens[1], str):
+ name = tokens[1]
+ already_defined = name in self.named_choices
+
+ if already_defined:
+ choice = self.named_choices[name]
+ else:
+ choice = Choice()
+ if name is not None:
+ choice.name = name
+ self.named_choices[name] = choice
+
+ choice.config = self
+
+ choice.def_locations.append((filename, linenr))
+
+ # Parse properties and contents
+ self._parse_properties(line_feeder, choice, deps, visible_if_deps)
+ choice.block = self._parse_block(line_feeder,
+ T_ENDCHOICE,
+ choice,
+ None,
+ visible_if_deps)
+
+ choice._determine_actual_items()
+
+ # If no type is set for the choice, its type is that of the first
+ # choice item
+ if choice.type == UNKNOWN:
+ for item in choice.get_actual_items():
+ if item.get_type() != UNKNOWN:
+ choice.type = item.get_type()
+ break
+
+ # Each choice item of UNKNOWN type gets the type of the choice
+ for item in choice.get_actual_items():
+ if item.type == UNKNOWN:
+ item.type = choice.type
+
+ # For named choices defined in multiple locations, only record
+ # at the first definition
+ if not already_defined:
+ block.add_item(choice)
+ self.choices.append(choice)
+
+ elif t0 == T_COMMENT:
+ comment = Comment()
+ comment.config = self
+ comment.parent = parent
+
+ comment.filename = filename
+ comment.linenr = linenr
+
+ comment.text = tokens.get_next()
+ self._parse_properties(line_feeder, comment, deps, visible_if_deps)
+
+ block.add_item(comment)
+ self.comments.append(comment)
+
+ elif t0 == T_SOURCE:
+ kconfig_file = tokens.get_next()
+ f = os.path.join(self.base_dir, os.path.expandvars(kconfig_file))
+
+ if not os.path.exists(f):
+ raise IOError, ('{0}:{1}: sourced file "{2}" not found. Perhaps '
+ 'base_dir (argument to Config.__init__(), currently '
+ '"{3}") is set to the wrong value.'
+ .format(filename,
+ linenr,
+ kconfig_file,
+ self.base_dir))
+
+ file_block = self._parse_file(f, parent, deps, visible_if_deps)
+ block.add_items_from_block(file_block)
+
+ elif t0 == T_MAINMENU:
+ text = tokens.get_next()
+
+ if self.mainmenu_text is not None:
+ self._warn("overriding 'mainmenu' text. "
+ 'Old value: "{0}", new value: "{1}".'
+ .format(self.mainmenu_text, text),
+ filename,
+ linenr)
+
+ self.mainmenu_text = os.path.expandvars(text)
+
+ else:
+ _parse_error(line, "unrecognized construct.", filename, linenr)
+
+ def _parse_properties(self, line_feeder, stmt, deps, visible_if_deps):
+ """Parsing of properties for symbols, menus, choices, and comments."""
+
+ def parse_val_and_cond(tokens, line, filename, linenr):
+ """Parses '<expr1> if <expr2>' constructs, where the 'if' part is
+ optional. Returns a tuple containing the parsed expressions, with
+ None as the second element if the 'if' part is missing."""
+ val = self._parse_expr(tokens, stmt, line, filename, linenr, False)
+
+ if tokens.check(T_IF):
+ return (val, self._parse_expr(tokens, stmt, line, filename, linenr))
+
+ return (val, None)
+
+ # In case the symbol is defined in multiple locations, we need to
+ # remember what prompts, defaults, and selects are new for this
+ # definition, as "depends on" should only apply to the local
+ # definition.
+ new_prompt = None
+ new_def_exprs = []
+ new_selects = []
+
+ # Dependencies from 'depends on' statements
+ depends_on_expr = None
+
+ while True:
+ line = line_feeder.get_next()
+ if line is None:
+ break
+
+ filename = line_feeder.get_filename()
+ linenr = line_feeder.get_linenr()
+
+ tokens = self._tokenize(line, True, filename, linenr)
+
+ if tokens.is_empty():
+ continue
+
+ t0 = tokens.get_next()
+
+ if t0 == T_HELP:
+ # Find first non-empty line and get its indentation
+
+ line_feeder.remove_while(str.isspace)
+ line = line_feeder.get_next()
+
+ if line is None:
+ stmt.help = ""
+ break
+
+ indent = _indentation(line)
+
+ # If the first non-empty lines has zero indent, there is no
+ # help text
+ if indent == 0:
+ stmt.help = ""
+ line_feeder.go_back()
+ break
+
+ help_lines = [_deindent(line, indent)]
+
+ # The help text goes on till the first non-empty line with less
+ # indent
+ while True:
+ line = line_feeder.get_next()
+ if (line is None) or \
+ (not line.isspace() and _indentation(line) < indent):
+ stmt.help = "".join(help_lines)
+ break
+
+ help_lines.append(_deindent(line, indent))
+
+ if line is None:
+ break
+
+ line_feeder.go_back()
+
+ elif t0 == T_PROMPT:
+ # 'prompt' properties override each other within a single
+ # definition of a symbol, but additional prompts can be added
+ # by defining the symbol multiple times; hence 'new_prompt'
+ # instead of 'prompt'.
+ new_prompt = parse_val_and_cond(tokens, line, filename, linenr)
+
+ elif t0 == T_DEFAULT:
+ new_def_exprs.append(parse_val_and_cond(tokens, line, filename, linenr))
+
+ elif t0 == T_DEPENDS:
+ if not tokens.check(T_ON):
+ _parse_error(line, 'expected "on" after "depends".', filename, linenr)
+
+ parsed_deps = self._parse_expr(tokens, stmt, line, filename, linenr)
+
+ if isinstance(stmt, (Menu, Comment)):
+ stmt.dep_expr = self._make_and(stmt.dep_expr, parsed_deps)
+ else:
+ depends_on_expr = self._make_and(depends_on_expr, parsed_deps)
+
+ elif t0 == T_VISIBLE:
+ if not tokens.check(T_IF):
+ _parse_error(line, 'expected "if" after "visible".', filename, linenr)
+ if not isinstance(stmt, Menu):
+ _parse_error(line,
+ "'visible if' is only valid for menus.",
+ filename,
+ linenr)
+
+ parsed_deps = self._parse_expr(tokens, stmt, line, filename, linenr)
+ stmt.visible_if_expr = self._make_and(stmt.visible_if_expr, parsed_deps)
+
+ elif t0 == T_SELECT:
+ target = tokens.get_next()
+
+ stmt.referenced_syms.add(target)
+ stmt.selected_syms.add(target)
+
+ if tokens.check(T_IF):
+ new_selects.append((target,
+ self._parse_expr(tokens, stmt, line, filename, linenr)))
+ else:
+ new_selects.append((target, None))
+
+ elif t0 in (T_BOOL, T_TRISTATE, T_INT, T_HEX, T_STRING):
+ stmt.type = token_to_type[t0]
+
+ if len(tokens) > 1:
+ new_prompt = parse_val_and_cond(tokens, line, filename, linenr)
+
+ elif t0 == T_RANGE:
+ lower = tokens.get_next()
+ upper = tokens.get_next()
+
+ if tokens.check(T_IF):
+ stmt.ranges.append((lower, upper,
+ self._parse_expr(tokens, stmt, line, filename, linenr)))
+ else:
+ stmt.ranges.append((lower, upper, None))
+
+ elif t0 == T_DEF_BOOL:
+ stmt.type = BOOL
+
+ if len(tokens) > 1:
+ new_def_exprs.append(parse_val_and_cond(tokens, line, filename, linenr))
+
+ elif t0 == T_DEF_TRISTATE:
+ stmt.type = TRISTATE
+
+ if len(tokens) > 1:
+ new_def_exprs.append(parse_val_and_cond(tokens, line, filename, linenr))
+
+ elif t0 == T_OPTIONAL:
+ if not isinstance(stmt, Choice):
+ _parse_error(line,
+ '"optional" is only valid for choices.',
+ filename,
+ linenr)
+ stmt.optional = True
+
+ elif t0 == T_OPTION:
+ if tokens.check(T_ENV) and tokens.check(T_EQUAL):
+ env_var = tokens.get_next()
+
+ stmt.is_special_ = True
+ stmt.is_from_env = True
+
+ if env_var not in os.environ:
+ self._warn("""
+The symbol {0} references the non-existent environment variable {1} and will
+get the empty string as its value. You could set it in os.environ before
+calling Config() or make sure it is exported before invoking the script by
+running e.g.
+
+$ export {1}=<value>
+$ python foo.py
+
+or
+
+$ {1}=<value> python foo.py
+
+If you're using kconfiglib via 'make scriptconfig' it should have set up
+the environment correctly for you. If you still got this message, that
+might be an error, and you should e-mail kconfiglib@gmail.com.
+.""" .format(stmt.get_name(), env_var),
+ filename,
+ linenr)
+
+ stmt.cached_value = ""
+ else:
+ stmt.cached_value = os.environ[env_var]
+
+ elif tokens.check(T_DEFCONFIG_LIST):
+ self.defconfig_sym = stmt
+
+ elif tokens.check(T_MODULES):
+ self._warn("the 'modules' option is not supported. "
+ "Let me know if this is a problem for you; "
+ "it shouldn't be that hard to implement.",
+ filename,
+ linenr)
+
+ else:
+ _parse_error(line, "unrecognized option.", filename, linenr)
+
+ else:
+ # See comment in Config.__init__()
+ self.end_line = line
+ self.end_line_tokens = tokens
+ break
+
+ # Propagate dependencies from enclosing menus and if's.
+
+ # For menus and comments..
+ if isinstance(stmt, (Menu, Comment)):
+ stmt.orig_deps = stmt.dep_expr
+ stmt.deps_from_containing = deps
+ stmt.dep_expr = self._make_and(stmt.dep_expr, deps)
+
+ stmt.all_referenced_syms = \
+ stmt.referenced_syms.union(self._get_expr_syms(deps))
+
+ # For symbols and choices..
+ else:
+
+ # See comment for 'menu_dep'
+ stmt.menu_dep = depends_on_expr
+
+ # Propagate dependencies specified with 'depends on' to any new
+ # default expressions, prompts, and selections ("new" since a
+ # symbol might be defined in multiple places and the dependencies
+ # should only apply to the local definition).
+
+ new_def_exprs = [(val_expr, self._make_and(cond_expr, depends_on_expr))
+ for (val_expr, cond_expr) in new_def_exprs]
+
+ new_selects = [(target, self._make_and(cond_expr, depends_on_expr))
+ for (target, cond_expr) in new_selects]
+
+ if new_prompt is not None:
+ prompt, cond_expr = new_prompt
+
+ # 'visible if' dependencies from enclosing menus get propagated
+ # to prompts
+ if visible_if_deps is not None:
+ cond_expr = self._make_and(cond_expr, visible_if_deps)
+
+ new_prompt = (prompt, self._make_and(cond_expr, depends_on_expr))
+
+ # We save the original expressions -- before any menu and if
+ # conditions have been propagated -- so these can be retrieved
+ # later.
+
+ stmt.orig_def_exprs.extend(new_def_exprs)
+ if new_prompt is not None:
+ stmt.orig_prompts.append(new_prompt)
+
+ # Only symbols can select
+ if isinstance(stmt, Symbol):
+ stmt.orig_selects.extend(new_selects)
+
+ # Save dependencies from enclosing menus and if's
+ stmt.deps_from_containing = deps
+
+ # The set of symbols referenced directly by the symbol/choice plus
+ # all symbols referenced by enclosing menus and if's.
+ stmt.all_referenced_syms \
+ = stmt.referenced_syms.union(self._get_expr_syms(deps))
+
+ # Propagate dependencies from enclosing menus and if's
+
+ stmt.def_exprs.extend([(val_expr, self._make_and(cond_expr, deps))
+ for (val_expr, cond_expr) in new_def_exprs])
+
+ for (target, cond) in new_selects:
+ target.rev_dep = self._make_or(target.rev_dep,
+ self._make_and(stmt,
+ self._make_and(cond, deps)))
+
+ if new_prompt is not None:
+ prompt, cond_expr = new_prompt
+ stmt.prompts.append((prompt, self._make_and(cond_expr, deps)))
+
+ #
+ # Symbol table manipulation
+ #
+
+ def _sym_lookup(self, name, add_sym_if_not_exists = True):
+ """Fetches the symbol 'name' from the symbol table, optionally adding
+ it if it does not exist (this is usually what we want)."""
+ if name in self.syms:
+ return self.syms[name]
+
+ new_sym = Symbol()
+ new_sym.config = self
+ new_sym.name = name
+
+ if add_sym_if_not_exists:
+ self.syms[name] = new_sym
+ else:
+ # This warning is generated while evaluating an expression
+ # containing undefined symbols using Config.eval()
+ self._warn("no symbol {0} in configuration".format(name))
+
+ return new_sym
+
+ #
+ # Evaluation of symbols and expressions
+ #
+
+ def _eval_expr(self, expr):
+ """Evaluates an expression and returns one of the tristate values "n",
+ "m" or "y"."""
+ res = self._eval_expr_2(expr)
+
+ # Promote "m" to "y" if we're running without modules. Internally, "m"
+ # is often rewritten to "m" && MODULES by both the C implementation and
+ # kconfiglib, which takes care of cases where "m" should be false if
+ # we're running without modules.
+ if res == "m" and not self._has_modules():
+ return "y"
+
+ return res
+
+ def _eval_expr_2(self, expr):
+ if expr is None:
+ return "y"
+
+ if isinstance(expr, (str, Symbol)):
+ val = self._get_str_value(expr)
+ # Expressions always have a tristate value
+ return val if val in ("y", "m") else "n"
+
+ first_expr = expr[0]
+
+ if first_expr == OR:
+ res = "n"
+
+ for subexpr in expr[1]:
+ ev = self._eval_expr_2(subexpr)
+
+ # Return immediately upon discovering a "y" term
+ if ev == "y":
+ return "y"
+
+ if ev == "m":
+ res = "m"
+
+ # 'res' is either "n" or "m" here; we already handled the
+ # short-circuiting "y" case in the loop.
+ return res
+
+ if first_expr == AND:
+ res = "y"
+
+ for subexpr in expr[1]:
+ ev = self._eval_expr_2(subexpr)
+
+ # Return immediately upon discovering an "n" term
+ if ev == "n":
+ return "n"
+
+ if ev == "m":
+ res = "m"
+
+ # 'res' is either "m" or "y" here; we already handled the
+ # short-circuiting "n" case in the loop.
+ return res
+
+ if first_expr == NOT:
+ ev = self._eval_expr_2(expr[1])
+
+ if ev == "y":
+ return "n"
+
+ return "y" if (ev == "n") else "m"
+
+ if first_expr in (EQUAL, UNEQUAL):
+ _, sym_or_str_1, sym_or_str_2 = expr
+
+ val_1 = self._get_str_value(sym_or_str_1)
+ val_2 = self._get_str_value(sym_or_str_2)
+
+ if (first_expr == EQUAL and val_1 == val_2) or \
+ (first_expr == UNEQUAL and val_1 != val_2):
+
+ return "y"
+
+ return "n"
+
+ _internal_error("Internal error while evaluating expression with token stream {0}: "
+ "unknown type {0}."
+ .format(expr))
+
+ def _eval_to_int(self, expr):
+ return values[self._eval_expr(expr)]
+
+ def _get_str_value(self, obj):
+ if isinstance(obj, str):
+ return obj
+
+ # obj is a Symbol
+ return obj.calc_value()
+
+ def _eval_min(self, e1, e2):
+ e1_eval = self._eval_expr(e1)
+ e2_eval = self._eval_expr(e2)
+
+ return e1_eval if tri_less(e1_eval, e2_eval) else e2_eval
+
+ def _eval_max(self, e1, e2):
+ e1_eval = self._eval_expr(e1)
+ e2_eval = self._eval_expr(e2)
+
+ return e1_eval if tri_greater(e1_eval, e2_eval) else e2_eval
+
+ #
+ # Construction of expressions
+ #
+
+ # These functions as well as the _eval_min/max() functions above equate
+ # None with "y", which is usually what we want, but needs to be kept in
+ # mind.
+
+ def _make_or(self, e1, e2):
+ # Perform trivial simplification and avoid None's (which
+ # correspond to y's)
+ if "y" in (e1, e2) or None in (e1, e2):
+ return "y"
+
+ if e1 == "n":
+ return e2
+
+ if e2 == "n":
+ return e1
+
+ # Prefer to merge/update argument list if possible instead of creating
+ # a new OR node
+
+ if isinstance(e1, tuple) and e1[0] == OR:
+ if isinstance(e2, tuple) and e2[0] == OR:
+ return (OR, e1[1] + e2[1])
+ else:
+ return (OR, e1[1] + [e2])
+
+ if isinstance(e2, tuple) and e2[0] == OR:
+ return (OR, e2[1] + [e1])
+
+ return (OR, [e1, e2])
+
+ # Note: returns None if e1 == e2 == None
+
+ def _make_and(self, e1, e2):
+ if "n" in (e1, e2):
+ return "n"
+
+ if e1 in (None, "y"):
+ return e2
+
+ if e2 in (None, "y"):
+ return e1
+
+ # Prefer to merge/update argument list if possible instead of creating
+ # a new AND node
+
+ if isinstance(e1, tuple) and e1[0] == AND:
+ if isinstance(e2, tuple) and e2[0] == AND:
+ return (AND, e1[1] + e2[1])
+ else:
+ return (AND, e1[1] + [e2])
+
+ if isinstance(e2, tuple) and e2[0] == AND:
+ return (AND, e2[1] + [e1])
+
+ return (AND, [e1, e2])
+
+ #
+ # Methods related to the MODULES symbol
+ #
+
+ def _has_modules(self):
+ modules_sym = self.syms.get("MODULES")
+ return (modules_sym is not None) and (modules_sym.calc_value() == "y")
+
+ #
+ # Dependency tracking
+ #
+
+ def _build_dep(self):
+ """Populates the dep dictionary, linking a symbol to the symbols that
+ immediately depend on it."""
+ for sym in self.syms.itervalues():
+ self.dep[sym] = set()
+
+ def add_expr_deps(e, sym):
+ for s in self._get_expr_syms(e):
+ self.dep[s].add(sym)
+
+ # The directly dependent symbols of a symbol are:
+ # - Any symbols whose prompt or default value depends on the symbol
+ # - Any symbols whose rev_dep (select condition) depends on the symbol
+ # - Any symbols that belong to the same choice statement as the symbol
+ # (these won't be included in 'dep' as that makes the dependency
+ # graph unwieldy, but Symbol._get_dependent() will include them)
+ # - Any symbols in a choice statement that depends on the symbol
+ for sym in self.syms.itervalues():
+ for (_, e) in sym.prompts:
+ add_expr_deps(e, sym)
+
+ for (v, e) in sym.def_exprs:
+ add_expr_deps(v, sym)
+ add_expr_deps(e, sym)
+
+ add_expr_deps(sym.rev_dep, sym)
+
+ if sym.is_choice_item():
+ choice = sym.parent
+
+ for (_, e) in choice.prompts:
+ add_expr_deps(e, sym)
+
+ for (_, e) in choice.def_exprs:
+ add_expr_deps(e, sym)
+
+ def _get_expr_syms(self, expr):
+ """Returns the set() of symbols appearing in expr."""
+ if expr is None or isinstance(expr, str):
+ return set()
+
+ if isinstance(expr, Symbol):
+ return set((expr,))
+
+ elif expr[0] in (OR, AND):
+ res = set()
+ for subres in [self._get_expr_syms(e) for e in expr[1]]:
+ res.update(subres)
+ return res
+
+ elif expr[0] == NOT:
+ return self._get_expr_syms(expr[1])
+
+ elif expr[0] in (EQUAL, UNEQUAL):
+ res = set()
+
+ (_, v1, v2) = expr
+
+ if isinstance(v1, Symbol):
+ res.add(v1)
+
+ if isinstance(v2, Symbol):
+ res.add(v2)
+
+ return res
+
+ else:
+ _internal_error("Internal error while fetching symbols from an expression with "
+ "token stream {0}.".format(expr))
+
+ def _expr_val_str(self, expr, no_value_str = "(none)", get_val_instead_of_eval = False):
+ # Since values are valid expressions, _expr_to_str() will get a nice
+ # string representation for those as well.
+
+ if expr is None:
+ return no_value_str
+
+ if get_val_instead_of_eval:
+ if isinstance(expr, str):
+ return _expr_to_str(expr)
+ val = expr.calc_value()
+ else:
+ val = self._eval_expr(expr)
+
+ return "{0} (value: {1})".format(_expr_to_str(expr), _expr_to_str(val))
+
+ def _get_sym_or_choice_str(self, sc):
+ """Symbols and choices have many properties in common, so we factor out
+ common __str__() stuff here. "sc" is short for "symbol or choice"."""
+
+ # As we deal a lot with string representations here, use some
+ # convenient shorthand:
+ s = _expr_to_str
+
+ #
+ # Common symbol/choice properties
+ #
+
+ user_value_str = "(no user value)" if sc.user_val is None else s(sc.user_val)
+
+ visibility_str = s(sc.get_visibility())
+
+ # Build prompts string
+ if sc.prompts == []:
+ prompts_str = " (no prompts)"
+ else:
+ prompts_str_rows = []
+
+ for (prompt, cond_expr) in sc.orig_prompts:
+ if cond_expr is None:
+ prompts_str_rows.append(' "{0}"'.format(prompt))
+ else:
+ prompts_str_rows.append(' "{0}" if '.format(prompt) +
+ self._expr_val_str(cond_expr))
+
+ prompts_str = "\n".join(prompts_str_rows)
+
+ # Build locations string
+ if sc.def_locations == []:
+ locations_str = "(no locations)"
+ else:
+ locations_str = " ".join(["{0}:{1}".format(filename, linenr) for
+ (filename, linenr) in sc.def_locations])
+
+ # Build additional-dependencies-from-menus-and-if's string
+ additional_deps_str = " " + self._expr_val_str(sc.deps_from_containing,
+ "(no additional dependencies)")
+
+ #
+ # Symbol-specific stuff
+ #
+
+ if isinstance(sc, Symbol):
+
+ # Build value string
+ value_str = s(sc.calc_value())
+
+ # Build ranges string
+ if isinstance(sc, Symbol):
+ if sc.ranges == []:
+ ranges_str = " (no ranges)"
+ else:
+ ranges_str_rows = []
+
+ for (l, u, cond_expr) in sc.ranges:
+ if cond_expr is None:
+ ranges_str_rows.append(" [{0}, {1}]".format(s(l), s(u)))
+ else:
+ ranges_str_rows.append(" [{0}, {1}] if {2}"
+ .format(s(l), s(u), self._expr_val_str(cond_expr)))
+
+ ranges_str = "\n".join(ranges_str_rows)
+
+ # Build default values string
+ if sc.def_exprs == []:
+ defaults_str = " (no default values)"
+ else:
+ defaults_str_rows = []
+
+ for (val_expr, cond_expr) in sc.orig_def_exprs:
+ row_str = " " + self._expr_val_str(val_expr, "(none)", sc.get_type() == STRING)
+ defaults_str_rows.append(row_str)
+ defaults_str_rows.append(" Condition: " + self._expr_val_str(cond_expr))
+
+ defaults_str = "\n".join(defaults_str_rows)
+
+ # Build selects string
+ if sc.orig_selects == []:
+ selects_str = " (no selects)"
+ else:
+ selects_str_rows = []
+
+ for (target, cond_expr) in sc.orig_selects:
+ if cond_expr is None:
+ selects_str_rows.append(" {0}".format(target.name))
+ else:
+ selects_str_rows.append(" {0} if ".format(target.name) +
+ self._expr_val_str(cond_expr))
+
+ selects_str = "\n".join(selects_str_rows)
+
+ # Build reverse dependencies string
+ if sc.rev_dep == "n":
+ rev_dep_str = " (no reverse dependencies)"
+ else:
+ rev_dep_str = " " + self._expr_val_str(sc.rev_dep)
+
+ res = _sep_lines("Symbol " + (sc.name if sc.name is not None else "(no name)"),
+ "Type : " + typename[sc.type],
+ "Value : " + value_str,
+ "User value : " + user_value_str,
+ "Visibility : " + visibility_str,
+ "Is choice item : " + bool_str[sc.is_choice_item()],
+ "Is defined : " + bool_str[sc.is_defined_],
+ "Is from env. : " + bool_str[sc.is_from_environment()],
+ "Is special : " + bool_str[sc.is_special_] + "\n")
+
+ if sc.has_ranges():
+ res += _sep_lines("Ranges:",
+ ranges_str + "\n")
+
+ res += _sep_lines("Prompts:",
+ prompts_str,
+ "Default values:",
+ defaults_str,
+ "Selects:",
+ selects_str,
+ "Reverse dependencies:",
+ rev_dep_str,
+ "Additional dependencies from enclosing menus and if's:",
+ additional_deps_str,
+ "Locations: " + locations_str)
+
+ return res
+
+ #
+ # Choice-specific stuff
+ #
+
+ # Build name string (for named choices)
+ if sc.get_name() is None:
+ name_str = "(no name)"
+ else:
+ name_str = sc.get_name()
+
+ # Build selected symbol string
+ sel = sc.get_selection()
+ if sel is None:
+ sel_str = "(no selection)"
+ else:
+ sel_str = sel.get_name()
+
+ # Build mode string
+ mode_str = s(sc.calc_mode())
+
+ # Build default values string
+ if sc.def_exprs == []:
+ defaults_str = " (no default values)"
+ else:
+ defaults_str_rows = []
+
+ for (sym, cond_expr) in sc.orig_def_exprs:
+ if cond_expr is None:
+ defaults_str_rows.append(" {0}".format(sym.get_name()))
+ else:
+ defaults_str_rows.append(" {0} if ".format(sym.get_name()) +
+ self._expr_val_str(cond_expr))
+
+ defaults_str = "\n".join(defaults_str_rows)
+
+ # Build contained symbols string
+ names = [sym.get_name() for sym in sc.get_actual_items()]
+
+ if names == []:
+ syms_string = "(empty)"
+ else:
+ syms_string = " ".join(names)
+
+ return _sep_lines("Choice",
+ "Name (for named choices): " + name_str,
+ "Type : " + typename[sc.type],
+ "Selected symbol : " + sel_str,
+ "User value : " + user_value_str,
+ "Mode : " + mode_str,
+ "Visibility : " + visibility_str,
+ "Optional : " + bool_str[sc.optional],
+ "Prompts:",
+ prompts_str,
+ "Defaults:",
+ defaults_str,
+ "Choice symbols:",
+ " " + syms_string,
+ "Additional dependencies from enclosing menus and if's:",
+ additional_deps_str,
+ "Locations: " + locations_str)
+
+ def _expr_depends_on(self, expr, sym):
+ """Reimplementation of expr_depends_symbol() from mconf.c. Used to
+ determine if a submenu should be implicitly created, which influences what
+ items inside choice statements are considered choice items."""
+ if expr is None:
+ return False
+
+ def rec(expr):
+ if isinstance(expr, str):
+ return False
+
+ if isinstance(expr, Symbol):
+ return expr is sym
+
+ if expr[0] in (EQUAL, UNEQUAL):
+ return self._eq_to_sym(expr) is sym
+
+ if expr[0] == AND:
+ for and_expr in expr[1]:
+ if rec(and_expr):
+ return True
+
+ return False
+
+ return False
+
+ return rec(expr)
+
+ def _eq_to_sym(self, eq):
+ """_expr_depends_on() helper. For (in)equalities of the form sym = y/m
+ or sym != n, returns sym. For other (in)equalities, returns None."""
+ (relation, left, right) = eq
+
+ left = self._transform_n_m_y(left)
+ right = self._transform_n_m_y(right)
+
+ # Make sure the symbol (if any) appears to the left
+ if not isinstance(left, Symbol):
+ left, right = right, left
+
+ if not isinstance(left, Symbol):
+ return None
+
+ if (relation == EQUAL and right in ("m", "y")) or \
+ (relation == UNEQUAL and right == "n"):
+ return left
+
+ return None
+
+ def _transform_n_m_y(self, item):
+ """_eq_to_sym() helper. Translates the symbols n, m, and y to their
+ string equivalents."""
+ if item is self.syms["n"]:
+ return "n"
+ if item is self.syms["m"]:
+ return "m"
+ if item is self.syms["y"]:
+ return "y"
+ return item
+
+ def _warn(self, msg, filename = None, linenr = None):
+ """For printing warnings to stderr."""
+ if self.print_warnings:
+ self._warn_or_undef_assign(msg, WARNING, filename, linenr)
+
+ def _undef_assign(self, msg, filename = None, linenr = None):
+ """For printing informational messages related to assignments
+ to undefined variables to stderr."""
+ if self.print_undef_assign:
+ self._warn_or_undef_assign(msg, UNDEF_ASSIGN, filename, linenr)
+
+ def _warn_or_undef_assign(self, msg, msg_type, filename, linenr):
+ if filename is not None:
+ sys.stderr.write("{0}:".format(_clean_up_path(filename)))
+ if linenr is not None:
+ sys.stderr.write("{0}:".format(linenr))
+
+ if msg_type == WARNING:
+ sys.stderr.write("warning: ")
+ elif msg_type == UNDEF_ASSIGN:
+ sys.stderr.write("info: ")
+ else:
+ _internal_error('Internal error while printing warning: unknown warning type "{0}".'
+ .format(msg_type))
+
+ sys.stderr.write(msg + "\n")
+
+#
+# Constants and functions related to types, parsing, evaluation and printing,
+# put globally to unclutter the Config class a bit.
+#
+
+# Tokens
+(T_OR, T_AND, T_NOT,
+ T_OPEN_PAREN, T_CLOSE_PAREN,
+ T_EQUAL, T_UNEQUAL,
+ T_MAINMENU, T_MENU, T_ENDMENU,
+ T_SOURCE, T_CHOICE, T_ENDCHOICE,
+ T_COMMENT, T_CONFIG, T_MENUCONFIG,
+ T_HELP, T_IF, T_ENDIF, T_DEPENDS, T_ON,
+ T_OPTIONAL, T_PROMPT, T_DEFAULT,
+ T_BOOL, T_TRISTATE, T_HEX, T_INT, T_STRING,
+ T_DEF_BOOL, T_DEF_TRISTATE,
+ T_SELECT, T_RANGE, T_OPTION, T_ENV,
+ T_DEFCONFIG_LIST, T_MODULES, T_VISIBLE) = range(0, 38)
+
+# Keyword to token map
+keywords = {
+ "mainmenu" : T_MAINMENU,
+ "menu" : T_MENU,
+ "endmenu" : T_ENDMENU,
+ "endif" : T_ENDIF,
+ "endchoice" : T_ENDCHOICE,
+ "source" : T_SOURCE,
+ "choice" : T_CHOICE,
+ "config" : T_CONFIG,
+ "comment" : T_COMMENT,
+ "menuconfig" : T_MENUCONFIG,
+ "help" : T_HELP,
+ "---help---" : T_HELP,
+ "---" : T_HELP, # Hack to handle CONFIG_W1_CON
+ "if" : T_IF,
+ "depends" : T_DEPENDS,
+ "on" : T_ON,
+ "optional" : T_OPTIONAL,
+ "prompt" : T_PROMPT,
+ "default" : T_DEFAULT,
+ "bool" : T_BOOL,
+ "boolean" : T_BOOL,
+ "tristate" : T_TRISTATE,
+ "int" : T_INT,
+ "hex" : T_HEX,
+ "def_bool" : T_DEF_BOOL,
+ "def_tristate" : T_DEF_TRISTATE,
+ "string" : T_STRING,
+ "select" : T_SELECT,
+ "range" : T_RANGE,
+ "option" : T_OPTION,
+ "env" : T_ENV,
+ "defconfig_list" : T_DEFCONFIG_LIST,
+ "modules" : T_MODULES,
+ "visible" : T_VISIBLE }
+
+# Strings to use for True and False
+bool_str = { False : "false", True : "true" }
+
+# Tokens after which identifier-like lexemes are treated as strings. T_CHOICE
+# is included to avoid symbols being registered for named choices.
+string_lex = (T_BOOL, T_TRISTATE, T_INT, T_HEX, T_STRING,
+ T_CHOICE,
+ T_PROMPT,
+ T_MENU,
+ T_COMMENT,
+ T_SOURCE,
+ T_MAINMENU)
+
+# Characters that may appear in symbol names
+sym_chars = frozenset(string.ascii_letters + string.digits + "._/-")
+
+# Regular expressions for parsing .config files
+set_re = r"CONFIG_(\w+)=(.*)"
+unset_re = r"# CONFIG_(\w+) is not set"
+
+# Integers representing symbol types
+UNKNOWN, BOOL, TRISTATE, STRING, HEX, INT = range(0, 6)
+
+# Strings to use for types
+typename = {
+ UNKNOWN : "unknown",
+ BOOL : "bool",
+ TRISTATE : "tristate",
+ STRING : "string",
+ HEX : "hex",
+ INT : "int" }
+
+# Token to type mapping
+token_to_type = { T_BOOL : BOOL,
+ T_TRISTATE : TRISTATE,
+ T_STRING : STRING,
+ T_INT : INT,
+ T_HEX : HEX }
+
+# Default values for symbols of different types (the value the symbol gets if
+# it is not assigned a user value and none of its 'default' clauses kick in)
+default_value = { BOOL : "n",
+ TRISTATE : "n",
+ STRING : "",
+ INT : "",
+ HEX : "" }
+
+# Indicates that no item is selected in a choice statement
+NO_SELECTION = 0
+
+# Integers representing expression types
+OR, AND, NOT, EQUAL, UNEQUAL = range(0, 5)
+
+# Map from tristate values to integers
+values = {"n" : 0, "m" : 1, "y" : 2}
+
+# Printing-related stuff
+
+op_to_str = { AND : " && ",
+ OR : " || ",
+ EQUAL : " = ",
+ UNEQUAL : " != " }
+
+precedence = {OR : 0, AND : 1, NOT : 2}
+
+# Types of informational messages
+WARNING = 0
+UNDEF_ASSIGN = 1
+
+def _intersperse(lst, op):
+ """_expr_to_str() helper. Gets the string representation of each expression in lst
+ and produces a list where op has been inserted between the elements."""
+ if lst == []:
+ return ""
+
+ res = []
+
+ def handle_sub_expr(expr):
+ no_parens = isinstance(expr, (str, Symbol)) or \
+ expr[0] in (EQUAL, UNEQUAL) or \
+ precedence[op] <= precedence[expr[0]]
+ if not no_parens:
+ res.append("(")
+ res.extend(_expr_to_str_rec(expr))
+ if not no_parens:
+ res.append(")")
+
+ op_str = op_to_str[op]
+
+ handle_sub_expr(lst[0])
+ for expr in lst[1:]:
+ res.append(op_str)
+ handle_sub_expr(expr)
+
+ return res
+
+def _expr_to_str(expr):
+ s = "".join(_expr_to_str_rec(expr))
+ return s
+
+def _sym_str_string(sym_or_str):
+ if isinstance(sym_or_str, str):
+ return '"{0}"'.format(sym_or_str)
+ return sym_or_str.name
+
+def _expr_to_str_rec(expr):
+ if expr is None:
+ return [""]
+
+ if isinstance(expr, (Symbol, str)):
+ return [_sym_str_string(expr)]
+
+ if expr[0] in (OR, AND):
+ return _intersperse(expr[1], expr[0])
+
+ if expr[0] == NOT:
+ need_parens = not isinstance(expr[1], (str, Symbol))
+
+ res = ["!"]
+ if need_parens:
+ res.append("(")
+ res.extend(_expr_to_str_rec(expr[1]))
+ if need_parens:
+ res.append(")")
+ return res
+
+ if expr[0] in (EQUAL, UNEQUAL):
+ return [_sym_str_string(expr[1]),
+ op_to_str[expr[0]],
+ _sym_str_string(expr[2])]
+
+class _Block:
+
+ """Represents a list of items (symbols, menus, choice
+ statements and comments) appearing at the top-level of a
+ file or witin a menu, choice or if statement."""
+
+ def __init__(self):
+ self.items = []
+
+ def get_items(self):
+ return self.items
+
+ def add_item(self, item):
+ self.items.append(item)
+
+ def add_items_from_block(self, block):
+ self.items.extend(block.items)
+
+ def _make_conf(self):
+ # Collect the substrings in a list and later use join() instead of +=
+ # to build the final .config contents. With older Python versions, this
+ # yields linear instead of quadratic complexity.
+ strings = []
+ for item in self.items:
+ strings.extend(item._make_conf())
+
+ return strings
+
+ def add_depend_expr(self, expr):
+ for item in self.items:
+ item.add_depend_expr(expr)
+
+class Item():
+
+ """Base class for symbols and other Kconfig constructs. Subclasses are
+ Symbol, Choice, Menu, and Comment."""
+
+ def is_symbol(self):
+ """Returns True if the item is a symbol, otherwise False. Short for
+ isinstance(item, kconfiglib.Symbol)."""
+ return isinstance(self, Symbol)
+
+ def is_choice(self):
+ """Returns True if the item is a choice, otherwise False. Short for
+ isinstance(item, kconfiglib.Choice)."""
+ return isinstance(self, Choice)
+
+ def is_menu(self):
+ """Returns True if the item is a menu, otherwise False. Short for
+ isinstance(item, kconfiglib.Menu)."""
+ return isinstance(self, Menu)
+
+ def is_comment(self):
+ """Returns True if the item is a comment, otherwise False. Short for
+ isinstance(item, kconfiglib.Comment)."""
+ return isinstance(self, Comment)
+
+class _HasVisibility():
+
+ """Base class for elements that have a "visibility" that acts as an upper
+ limit on the values a user can set for them. Subclasses are Symbol and
+ Choice."""
+
+ def __init__(self):
+ self.cached_visibility = None
+ self.prompts = []
+
+ def _invalidate(self):
+ self.cached_visibility = None
+
+ def _calc_visibility(self):
+ if self.cached_visibility is None:
+ vis = "n"
+ for (prompt, cond_expr) in self.prompts:
+ vis = self.config._eval_max(vis, cond_expr)
+
+ if isinstance(self, Symbol) and self.is_choice_item():
+ vis = self.config._eval_min(vis, self.parent._calc_visibility())
+
+ # Promote "m" to "y" if we're dealing with a non-tristate
+ if vis == "m" and self.type != TRISTATE:
+ vis = "y"
+
+ self.cached_visibility = vis
+
+ return self.cached_visibility
+
+class Symbol(Item, _HasVisibility):
+
+ """Represents a configuration symbol."""
+
+ #
+ # Public interface
+ #
+
+ def calc_value(self):
+ """Calculate and return the value of the symbol."""
+
+ if self.cached_value is not None:
+ return self.cached_value
+
+ self.write_to_conf = False
+
+ # The following means that what to the user looks like a reference to
+ # an undefined symbol will actually get treated like a string whose
+ # value is the symbol name, which can be a bit unexpected.
+ if self.type == UNKNOWN:
+ self.cached_value = self.name
+ return self.name
+
+ new_val = default_value[self.type]
+
+ vis = self._calc_visibility()
+
+ if self.type in (BOOL, TRISTATE):
+ # The visibility and mode (modules-only or single-selection) of
+ # choice items will be taken into account in self._calc_visibility()
+
+ if self.is_choice_item():
+ if vis != "n":
+ choice = self.parent
+ mode = choice.calc_mode()
+
+ self.write_to_conf = (mode != "n")
+
+ if mode == "y":
+ new_val = "y" if (choice.get_selection() is self) else "n"
+ elif mode == "m":
+ if self.user_val in ("m", "y"):
+ new_val = "m"
+
+ else:
+ use_defaults = True
+
+ if vis != "n":
+ # If the symbol is visible and has a user value, use that.
+ # Otherwise, look at defaults.
+ self.write_to_conf = True
+
+ if self.user_val is not None:
+ new_val = self.config._eval_min(self.user_val, vis)
+ use_defaults = False
+
+ if use_defaults:
+ for (val_expr, cond_expr) in self.def_exprs:
+ cond_eval = self.config._eval_expr(cond_expr)
+
+ if cond_eval != "n":
+ self.write_to_conf = True
+ new_val = self.config._eval_min(val_expr, cond_eval)
+ break
+
+ # Reverse dependencies take precedence
+ rev_dep_val = self.config._eval_expr(self.rev_dep)
+
+ if rev_dep_val != "n":
+ self.write_to_conf = True
+ new_val = self.config._eval_max(new_val, rev_dep_val)
+
+ # Promote "m" to "y" for booleans
+ if new_val == "m" and self.type == BOOL:
+ new_val = "y"
+
+ elif self.type == STRING:
+ use_defaults = True
+
+ if vis != "n":
+ self.write_to_conf = True
+ if self.user_val is not None:
+ new_val = self.user_val
+ use_defaults = False
+
+ if use_defaults:
+ for (val_expr, cond_expr) in self.def_exprs:
+ if self.config._eval_expr(cond_expr) != "n":
+ self.write_to_conf = True
+ new_val = self.config._get_str_value(val_expr)
+ break
+
+ elif self.type in (HEX, INT):
+ active_range = None
+ use_defaults = True
+
+ # TODO: HEX case should only accept hex and dec numbers
+
+ for(l, u, cond_expr) in self.ranges:
+ if self.config._eval_expr(cond_expr) != "n":
+ l_str = self.config._get_str_value(l)
+ u_str = self.config._get_str_value(u)
+
+ if self.type == INT:
+ if not _is_dec(l_str):
+ l_str = "0"
+
+ if not _is_dec(u_str):
+ u_str = "0"
+
+ active_range = (int(l_str), int(u_str))
+
+ else: # self.type == HEX
+ if not _is_hex(l_str):
+ l_str = "0x0"
+
+ if not _is_hex(u_str):
+ u_str = "0x0"
+
+ active_range = (int(l_str, 16), int(u_str, 16))
+
+ break
+
+ if vis != "n":
+ self.write_to_conf = True
+
+ if self.user_val is not None:
+ if self.type == INT:
+ if _is_dec(self.user_val):
+ num = int(self.user_val)
+ if active_range is None or \
+ active_range[0] <= num <= active_range[1]:
+
+ use_defaults = False
+ new_val = self.user_val
+
+ else: # HEX
+ if _is_hex(self.user_val):
+ num = int(self.user_val, 16)
+ if active_range is None or \
+ active_range[0] <= num <= active_range[1]:
+
+ use_defaults = False
+ new_val = self.user_val
+
+ if use_defaults:
+ for (val_expr, cond_expr) in self.def_exprs:
+ if self.config._eval_expr(cond_expr) != "n":
+ self.write_to_conf = True
+
+ # Kconfig allows arbitrary string values for hex/int
+ # (possibly a bug, but we still emulate it).
+
+ new_val = self.config._get_str_value(val_expr)
+
+ if self.type == INT:
+ if _is_dec(new_val):
+ new_val_num = int(new_val)
+ elif self.type == HEX:
+ if _is_hex(new_val):
+ new_val_num = int(new_val, 16)
+
+ if new_val_num is not None:
+ if active_range is not None:
+ l_num, u_num = active_range
+
+ was_clamped = False
+
+ if new_val_num < l_num:
+ new_val_num = l_num
+ was_clamped = True
+ elif new_val_num > u_num:
+ new_val_num = u_num
+ was_clamped = True
+
+ if was_clamped:
+ new_val = (str(new_val_num) if self.type == INT else
+ hex(new_val_num))
+
+ break
+
+ self.cached_value = new_val
+ return new_val
+
+ def calc_default_value(self):
+ """Calculates the value the symbol would get purely from defaults,
+ ignoring visibility (assumed to be "y"), reverse dependencies
+ (selects), user values and dependencies from enclosing menus and if's.
+ Returns None if no default would kick in."""
+ for (val_expr, cond_expr) in self.orig_def_exprs:
+ cond_eval = self.config._eval_expr(cond_expr)
+
+ if cond_eval != "n":
+ return self.config._eval_expr(val_expr)
+
+ return None
+
+ def set_value(self, v):
+ """Sets the (user) value of the symbol. Equal in effect to assigning
+ the value to the symbol within a .config file. Use
+ get_lower/upper_bound() to find the range of valid values for bool and
+ tristate symbols; setting values outside this range will cause the user
+ value to differ from the result of Symbol.calc_value(). Any value that
+ is valid for the type (bool, tristate, etc.) will end up being
+ reflected in Symbol.get_user_value() though.
+
+ Any symbols dependent on the symbol are (recursively) invalidated, so
+ things should just work with regards to dependencies.
+
+ v -- The value to give to the symbol."""
+ self._set_value_no_invalidate(v, False)
+
+ # There might be something more efficient you could do here, but play
+ # it safe.
+ if self.name == "MODULES":
+ self.config._invalidate_all()
+ return
+
+ self._invalidate()
+ self._invalidate_dependent()
+
+ def reset(self):
+ """Resets the value of the symbol, as if the symbol had never gotten a
+ (user) value via Config.load_config() or Symbol.set_value(). Dependent
+ symbols are recursively invalidated."""
+ self._reset_no_recursive_invalidate()
+ self._invalidate_dependent()
+
+ def get_user_value(self):
+ """Returns the value assigned to the symbol in a .config or via
+ Symbol.set_value() (provided the value was valid for the type of the
+ symbol). Returns None in case of no user value."""
+ return self.user_val
+
+ def get_name(self):
+ """Returns the name of the symbol."""
+ return self.name
+
+ def get_upper_bound(self):
+ """Returns the highest value the symbol can be given via
+ Symbol.set_value() (that will not be truncated): one of "m" or "y",
+ arranged from lowest to highest. This corresponds to the highest value
+ the symbol could be given in the 'make menuconfig' interface. Returns
+ None if the symbol is not visible (would not appear in the 'make
+ menuconfig' interface), or if the symbol's value cannot be changed (if
+ it is selected to "y", or to "m" if its visibility also happens to be
+ "m"). Also returns None for non-bool, non-tristate symbols and special
+ symbols.
+
+ See also the tri_less*() and tri_greater*() functions, which could
+ come in handy here."""
+ if not self._is_assignable_bool_or_tristate():
+ return None
+
+ return self._calc_visibility()
+
+ def get_lower_bound(self):
+ """Returns the lowest value the symbol can be given via
+ Symbol.set_value() (that will not be truncated): one of "n" or "m",
+ arranged from lowest to highest. This corresponds to the lowest value
+ the symbol could be given in the 'make menuconfig' interface. Returns
+ None if the symbol is not visible (would not appear in the 'make
+ menuconfig' interface), or if the symbol's value cannot be changed (if
+ it is selected to "y", or to "m" if its visibility also happens to be
+ "m"). Also returns None for non-bool, non-tristate symbols and special
+ symbols.
+
+ See also the tri_less*() and tri_greater*() functions, which could
+ come in handy here."""
+ if not self._is_assignable_bool_or_tristate():
+ return None
+
+ return self.config._eval_expr(self.rev_dep)
+
+ def get_assignable_values(self):
+ """For bool and tristate symbols, returns a list containing the values
+ the symbol can be given via Symbol.set_value() (see get_lower_bound()/
+ get_upper_bound()). Returns the empty list for symbol that cannot be
+ given a new value (that cannot be assigned a value that won't be
+ truncated/ignored that is), as well as for non-bool, non-tristate and
+ special symbols. Usage example:
+
+ if "m" in sym.get_assignable_values():
+ sym.set_value("m")"""
+ if not self._is_assignable_bool_or_tristate():
+ return []
+
+ return ["n", "m", "y"][values[self.config._eval_expr(self.rev_dep)] :
+ values[self._calc_visibility()] + 1]
+
+ def get_type(self):
+ """Returns the type of the symbol: one of UNKNOWN, BOOL, TRISTATE,
+ STRING, HEX, or INT. These are defined at the top level of the module,
+ so you'd do something like
+
+ if sym.get_type() == kconfiglib.STRING:
+ ..."""
+ return self.type
+
+ def get_visibility(self):
+ """Returns the visibility of the symbol: one of "n", "m" or "y". For
+ bool and tristate symbols, this is an upper bound on the value users
+ can set for the symbol. For other types of symbols, a visibility of "n"
+ means the user value will be ignored. A visibility of "n" corresponds
+ to not being visible in the 'make *config' interfaces."""
+ return self._calc_visibility()
+
+ def get_parent(self):
+ """Returns the menu or choice statement that contains the symbol, or
+ None if the symbol is at the top level. Note that if statements are
+ treated as syntactic sugar and do not have an explicit class
+ representation."""
+ return self.parent
+
+ def get_sibling_symbols(self, include_self = False):
+ """Returns a list containing all symbols that are in the same menu or
+ choice statement as the symbol, or that are also at the top level in
+ case the symbol is at the top level.
+
+ include_self (default: False) -- True if the symbol itself should be
+ included in the result, otherwise
+ False."""
+
+ return [item for item in self.get_sibling_items(include_self)
+ if isinstance(item, Symbol)]
+
+ def get_sibling_items(self, include_self = False):
+ """Returns a list containing all items (symbols, menus, choice
+ statements and comments) that are in the same menu or choice statement
+ as the symbol, or that are also at the top level in case the symbol is
+ at the top level. The items appear in the same order as within the
+ configuration.
+
+ include_self (default: False) -- True if the symbol itself should be
+ included in the result, otherwise
+ False."""
+
+ if self.parent is None:
+ items = self.config.get_top_level_items()
+ else:
+ items = self.parent.get_items()
+
+ if include_self:
+ return items
+
+ return [item for item in items if item is not self]
+
+ def get_referenced_symbols(self, refs_from_enclosing = False):
+ """Returns the set() of all symbols referenced by this symbol. For
+ example, the symbol defined by
+
+ config FOO
+ bool
+ prompt "foo" if A && B
+ default C if D
+ depends on E
+ select F if G
+
+ references the symbols A through G.
+
+ refs_from_enclosing (default: False) -- If True, the symbols
+ referenced by enclosing menus and if's will be
+ included in the result."""
+ return self.all_referenced_syms if refs_from_enclosing else self.referenced_syms
+
+ def get_selected_symbols(self):
+ """Returns the set() of all symbols X for which this symbol has a
+ 'select X' or 'select X if Y' (regardless of whether Y is satisfied or
+ not). This is a subset of the symbols returned by
+ get_referenced_symbols()."""
+ return self.selected_syms
+
+ def get_help(self):
+ """Returns the help text of the symbol, or None if the symbol has no
+ help text."""
+ return self.help
+
+ def get_config(self):
+ """Returns the Config instance that represents the configuration this
+ symbol is from."""
+ return self.config
+
+ def get_def_locations(self):
+ """Returns a list of (filename, linenr) tuples, where filename (string)
+ and linenr (int) represent a location where the symbol is defined. For
+ the vast majority of symbols this list will only contain one element.
+ For the following Kconfig, FOO would get two entries: the lines marked
+ with *.
+
+ config FOO *
+ bool "foo prompt 1"
+
+ config FOO *
+ bool "foo prompt 2"
+ """
+ return self.def_locations
+
+ def get_ref_locations(self):
+ """Returns a list of (filename, linenr) tuples, where filename (string)
+ and linenr (int) represent a location where the symbol is referenced in
+ the configuration. For example, the lines marked by * would be included
+ for FOO below:
+
+ config A
+ bool
+ default BAR || FOO *
+
+ config B
+ tristate
+ depends on FOO *
+ default m if FOO *
+
+ if FOO *
+ config A
+ bool "A"
+ endif
+
+ config FOO (definition not included)
+ bool
+ """
+ return self.ref_locations
+
+ def is_modifiable(self):
+ """Returns True or False depending on if the value of symbol could be
+ modified by setting a user value with Symbol.set_value(). This
+ corresponds to symbols that would appear in the 'make menuconfig'
+ interface and not already be pinned to a specific value by being
+ selected. Returns False for special symbols (e.g. n, m and y)."""
+ if self.is_special_:
+ return False
+
+ allowed = range(self.config._eval_to_int(self.config._eval_expr(self.rev_dep)),
+ self.config._eval_to_int(self._calc_visibility()) + 1)
+
+ return len(allowed) > 1
+
+ def is_defined(self):
+ """Returns False if the symbol is referred to in the Kconfig but never
+ actually defined, otherwise True."""
+ return self.is_defined_
+
+ def is_special(self):
+ """Returns True if the symbol is one of the special symbols n, m or y,
+ or gets its value from the environment. Otherwise, returns False."""
+ return self.is_special_
+
+ def is_from_environment(self):
+ """Returns True if the symbol gets its value from the environment.
+ Otherwise, returns False."""
+ return self.is_from_env
+
+ def has_ranges(self):
+ """Returns True if the symbol is of type INT or HEX and has ranges that
+ limits what values it can take on, otherwise False."""
+ return self.ranges != []
+
+ def is_choice_item(self):
+ """Returns True if the symbol is in a choice statement and is an actual
+ choice item (see Choice.get_actual_items()); otherwise, returns
+ False."""
+ return self.is_choice_item_
+
+ def is_choice_selection(self):
+ """Returns True if the symbol is contained in a choice statement and is
+ the selected item, otherwise False. Equivalent to 'sym.is_choice_item()
+ and sym.get_parent().get_selection() is sym'."""
+ return self.is_choice_item_ and \
+ self.parent.get_selection() is self
+
+ def __str__(self):
+ """Returns a string containing various information about the symbol."""
+ return self.config._get_sym_or_choice_str(self)
+
+ #
+ # Private methods
+ #
+
+ def __init__(self):
+ """Symbol constructor -- not intended to be called directly by
+ kconfiglib clients."""
+
+ # Set default values
+ _HasVisibility.__init__(self)
+
+ self.config = None
+
+ self.parent = None
+ self.name = None
+ self.type = UNKNOWN
+
+ self.def_exprs = []
+ self.ranges = []
+ self.rev_dep = "n"
+
+ # The prompt, default value and select conditions without any
+ # dependencies from menus or if's propagated to them
+
+ self.orig_prompts = []
+ self.orig_def_exprs = []
+ self.orig_selects = []
+
+ # Dependencies inherited from containing menus and if's
+ self.deps_from_containing = None
+
+ self.help = None
+
+ # The set of symbols referenced by this symbol (see
+ # get_referenced_symbols())
+ self.referenced_syms = set()
+
+ # The set of symbols selected by this symbol (see
+ # get_selected_symbols())
+ self.selected_syms = set()
+
+ # Like 'referenced_syms', but includes symbols from
+ # dependencies inherited from enclosing menus and if's
+ self.all_referenced_syms = set()
+
+ # This is set to True for "actual" choice items. See
+ # Choice._determine_actual_items(). The trailing underscore avoids a
+ # collision with is_choice_item().
+ self.is_choice_item_ = False
+
+ # This records only dependencies specified with 'depends on'. Needed
+ # when determining actual choice items (hrrrr...). See also
+ # Choice._determine_actual_items().
+ self.menu_dep = None
+
+ # See Symbol.get_ref/def_locations().
+ self.def_locations = []
+ self.ref_locations = []
+
+ self.user_val = None
+
+ # Flags
+
+ # Should the symbol get an entry in .config?
+ self.write_to_conf = False
+
+ # Stores the calculated value to avoid unnecessary recalculation
+ self.cached_value = None
+
+ # Does the symbol have an entry in the Kconfig file? The Trailing
+ # underscore avoids a collision with is_defined().
+ self.is_defined_ = False
+
+ # Does the symbol get its value in some special way, e.g. from the
+ # environment or by being one of the special symbols n, m, and y? If
+ # so, the value is stored in self.cached_value, which is never
+ # invalidated. The trailing underscore avoids a collision with
+ # is_special().
+ self.is_special_ = False
+
+ # Does the symbol get its value from the environment?
+ self.is_from_env = False
+
+ # See Choice._make_conf()
+ self.already_written = False
+
+ def _invalidate(self):
+ if self.is_special_:
+ return
+
+ if self.is_choice_item():
+ self.parent._invalidate()
+
+ _HasVisibility._invalidate(self)
+
+ self.write_to_conf = False
+ self.cached_value = None
+
+ def _invalidate_dependent(self):
+ for sym in self._get_dependent():
+ sym._invalidate()
+
+ def _set_value_no_invalidate(self, v, suppress_load_warnings):
+ """Like set_value(), but does not invalidate any symbols.
+
+ suppress_load_warnings --
+ some warnings don't make sense when loading a .config that do make
+ sense when manually invoking set_value(). This flag is set to True to
+ suppress such warnings."""
+
+ if self.is_special_:
+ if self.is_from_env:
+ self.config._warn('attempt to assign the value "{0}" to the '
+ 'symbol {1}, which gets its value from the '
+ 'environment. Assignment ignored.'
+ .format(v, self.name))
+ else:
+ self.config._warn('attempt to assign the value "{0}" to the '
+ 'special symbol {1}. Assignment ignored.'
+ .format(v, self.name))
+
+ return
+
+
+ if not self.is_defined_:
+ filename, linenr = self.ref_locations[0]
+
+ self.config._undef_assign('attempt to assign the value "{0}" to {1}, '
+ "which is referenced at {2}:{3} but never "
+ "defined. Assignment ignored."
+ .format(v, self.name, filename, linenr))
+ return
+
+ # Check if the value is valid for our type
+
+ valid = ( self.type == BOOL and v in ("n", "y") ) or \
+ ( self.type == TRISTATE and v in ("n", "m", "y") ) or \
+ ( self.type == STRING ) or \
+ ( self.type == INT and _is_dec(v) ) or \
+ ( self.type == HEX and _is_hex(v) )
+
+ if not valid:
+ self.config._warn('the value "{0}" is invalid for {1}, which has type {2}. '
+ "Assignment ignored."
+ .format(v, self.name, typename[self.type]))
+ return
+
+ if self.prompts == [] and not suppress_load_warnings:
+ self.config._warn('assigning "{0}" to the symbol {1} which lacks '
+ 'prompts and thus has visibility "n". The assignment '
+ 'will have no effect.'
+ .format(v, self.name))
+
+ self.user_val = v
+
+ if self.is_choice_item() and self.type in (BOOL, TRISTATE):
+ choice = self.parent
+ if v == "y":
+ choice.user_val = self
+ choice.user_mode = "y"
+ elif v == "m":
+ choice.user_val = None
+ choice.user_mode = "m"
+
+ def _reset_no_recursive_invalidate(self):
+ self._invalidate()
+ self.user_val = None
+
+ if self.is_choice_item():
+ self.parent._reset()
+
+ def _should_write(self):
+ # This check shouldn't be necessary as write_to_conf is never modified
+ # in calc_value() for special symbols, but just to be on the safe side:
+ if self.is_special_:
+ return False
+
+ # Symbols defined in multiple locations only get one entry in the
+ # .config.
+ if self.already_written:
+ return False
+
+ # write_to_conf is determined in calc_value(), so we need to call that
+ # first
+ self.calc_value()
+
+ return self.write_to_conf
+
+ def _make_conf(self):
+ if not self._should_write():
+ return []
+
+ self.already_written = True
+
+ if self.type in (BOOL, TRISTATE):
+ if self.calc_value() in ("m", "y"):
+ return ["CONFIG_{0}={1}".format(self.name, self.calc_value())]
+ return ["# CONFIG_{0} is not set".format(self.name)]
+
+ elif self.type == STRING:
+ return ['CONFIG_{0}="{1}"'.format(self.name, self.calc_value())]
+
+ elif self.type in (INT, HEX):
+ return ["CONFIG_{0}={1}".format(self.name, self.calc_value())]
+
+ else:
+ _internal_error('Internal error while creating .config: unknown type "{0}".'
+ .format(self.type))
+
+ def _get_dependent(self):
+ """Returns the list of symbols that should be invalidated if the value
+ of the symbol changes."""
+ res = set()
+
+ def rec(sym, ignore_choice = False):
+ for s in self.config.dep[sym]:
+ if s not in res:
+ res.add(s)
+ rec(s)
+
+ # Handle choices specially to avoid lots of hopping around between
+ # choice items (which all depend on each other) while calculating
+ # dependencies
+ if sym.is_choice_item() and not ignore_choice:
+ choice = sym.get_parent()
+
+ for s in choice.get_actual_items():
+ if s not in res and s is not self:
+ res.add(s)
+ rec(s, True)
+
+ rec(self)
+ return res
+
+ def _has_auto_menu_dep_on(self, on):
+ """See Choice._determine_actual_items()."""
+ if not isinstance(self.parent, Choice):
+ _internal_error("Attempt to determine auto menu dependency for symbol ouside of choice.")
+
+ if self.prompts == []:
+ # If we have no prompt, use the menu dependencies instead (what was
+ # specified with 'depends on')
+ return self.menu_dep is not None and \
+ self.config._expr_depends_on(self.menu_dep, on)
+
+ for (_, cond_expr) in self.prompts:
+ if self.config._expr_depends_on(cond_expr, on):
+ return True
+
+ return False
+
+ def _is_assignable_bool_or_tristate(self):
+ """Returns True if the symbol is a bool or tristate whose value can be
+ changed by the user."""
+ return self.type in (BOOL, TRISTATE) and \
+ not self.is_special_ and \
+ (self.config._eval_to_int(self._calc_visibility()) -
+ self.config._eval_to_int(self.config._eval_expr(self.rev_dep))) >= 1
+
+class Menu(Item):
+
+ """Represents a menu statement."""
+
+ #
+ # Public interface
+ #
+
+ def get_depends_on_visibility(self):
+ """Returns the visibility the menu gets from 'depends on' conditions.
+ This is propagated to subitems."""
+ return self.config._eval_expr(self.dep_expr)
+
+ def get_visible_if_visibility(self):
+ """Returns the visibility the menu gets from its 'visible if'
+ condition. "y" is the menu has no 'visible if' condition."""
+ return self.config._eval_expr(self.visible_if_expr)
+
+ def get_items(self, recursive = False):
+ """Returns a list containing the items (symbols, menus, choice
+ statements and comments) in in the menu, in the same order that the
+ items appear within the menu.
+
+ recursive (default: False) -- True if items contained in items within
+ the menu should be included
+ recursively (preorder)."""
+
+ if not recursive:
+ return self.block.get_items()
+
+ res = []
+ for item in self.block.get_items():
+ res.append(item)
+ if isinstance(item, Menu):
+ res.extend(item.get_items(True))
+ elif isinstance(item, Choice):
+ res.extend(item.get_items())
+ return res
+
+ def get_symbols(self, recursive = False):
+ """Returns a list containing the symbols in the menu, in the same order
+ that they appear within the menu.
+
+ recursive (default: False) -- True if symbols contained in items within
+ the menu should be included
+ recursively."""
+
+ return [item for item in self.get_items(recursive) if isinstance(item, Symbol)]
+
+ def get_title(self):
+ """Returns the title text of the menu."""
+ return self.title
+
+ def get_parent(self):
+ """Returns the menu or choice statement that contains the menu, or
+ None if the menu is at the top level. Note that if statements are
+ treated as syntactic sugar and do not have an explicit class
+ representation."""
+ return self.parent
+
+ def get_referenced_symbols(self, refs_from_enclosing = False):
+ """See Symbol.get_referenced_symbols()."""
+ return self.all_referenced_syms if refs_from_enclosing else self.referenced_syms
+
+ def get_location(self):
+ """Returns the location of the menu as a (filename, linenr) tuple,
+ where filename is a string and linenr an int."""
+ return (self.filename, self.linenr)
+
+ def __str__(self):
+ """Returns a string containing various information about the menu."""
+ depends_on_str = self.config._expr_val_str(self.orig_deps,
+ "(no dependencies)")
+ visible_if_str = self.config._expr_val_str(self.visible_if_expr,
+ "(no dependencies)")
+
+ additional_deps_str = " " + self.config._expr_val_str(self.deps_from_containing,
+ "(no additional dependencies)")
+
+ return _sep_lines("Menu",
+ "Title : " + self.title,
+ "'depends on' dependencies : " + depends_on_str,
+ "'visible if' dependencies : " + visible_if_str,
+ "Additional dependencies from enclosing menus and if's:",
+ additional_deps_str,
+ "Location: {0}:{1}".format(self.filename, self.linenr))
+
+ #
+ # Private methods
+ #
+
+ def __init__(self):
+ """Menu constructor -- not intended to be called directly by
+ kconfiglib clients."""
+
+ self.config = None
+
+ self.parent = None
+ self.title = None
+ self.block = None
+ self.dep_expr = None
+
+ # Dependency expression without dependencies from enclosing menus and
+ # if's propagated
+ self.orig_deps = None
+
+ # Dependencies inherited from containing menus and if's
+ self.deps_from_containing = None
+
+ # The 'visible if' expression
+ self.visible_if_expr = None
+
+ # The set of symbols referenced by this menu (see
+ # get_referenced_symbols())
+ self.referenced_syms = set()
+
+ # Like 'referenced_syms', but includes symbols from
+ # dependencies inherited from enclosing menus and if's
+ self.all_referenced_syms = None
+
+ self.filename = None
+ self.linenr = None
+
+ def _make_conf(self):
+ item_conf = self.block._make_conf()
+
+ if self.config._eval_expr(self.dep_expr) != "n" and \
+ self.config._eval_expr(self.visible_if_expr) != "n":
+ return ["\n#\n# {0}\n#".format(self.title)] + item_conf
+ else:
+ return item_conf
+
+class Choice(Item, _HasVisibility):
+
+ """Represents a choice statement. A choice can be in one of three modes:
+ "n", "m" and "y". "n" mode is for non-visible choices and optional choices
+ with no symbol selected; "m" means any number of symbols can be set to "m"
+ while the rest will be "n" (only tristate choices can be in this mode); and
+ "y" means one symbol will be "y" while the rest will be "n" (the most
+ common case). The visibility is an upper bound on the mode, and the mode
+ changes automatically as values are assigned to symbols within the
+ choice."""
+
+ #
+ # Public interface
+ #
+
+ def get_selection(self):
+ """Returns the symbol selected (either by the user or through
+ defaults), or None if either no symbol is selected or the mode is not
+ "y"."""
+ if self.cached_selection is not None:
+ if self.cached_selection == NO_SELECTION:
+ return None
+ return self.cached_selection
+
+ if self.calc_mode() != "y":
+ return self._cache_ret(None)
+
+ # User choice available?
+ if self.user_val is not None and \
+ self.user_val._calc_visibility() == "y":
+ return self._cache_ret(self.user_val)
+
+ if self.optional:
+ return self._cache_ret(None)
+
+ return self._cache_ret(self.get_selection_from_defaults())
+
+ def get_selection_from_defaults(self):
+ """Like Choice.get_selection(), but acts as if no symbol has been
+ selected by the user and no 'optional' flag is in effect."""
+
+ if self.actual_items == []:
+ return None
+
+ for (symbol, cond_expr) in self.def_exprs:
+ if self.config._eval_expr(cond_expr) != "n":
+ chosen_symbol = symbol
+ break
+ else:
+ chosen_symbol = self.actual_items[0]
+
+ # Is the chosen symbol visible?
+ if chosen_symbol._calc_visibility() != "n":
+ return chosen_symbol
+ else:
+ # Otherwise, pick the first visible symbol
+ for sym in self.actual_items:
+ if sym._calc_visibility() != "n":
+ return sym
+
+ return None
+
+ def get_user_selection(self):
+ """If the choice is in "y" mode and has a user-selected
+ symbol, returns that symbol. Otherwise, returns None."""
+ return self.user_val
+
+ def get_name(self):
+ """For named choices, returns the name. Returns None for unnamed
+ choices. No named choices appear anywhere in the kernel Kconfig
+ files as of Linux 2.6.38-rc3."""
+ return self.name
+
+ def get_type(self):
+ """Returns the type of the choice. See Symbol.get_type()."""
+ return self.type
+
+ def get_items(self):
+ """Gets all items contained in the choice in the same order as within
+ the configuration ("items" instead of "symbols" since choices and
+ comments might appear within choices. This only happens in one place as
+ of Linux 2.6.38-rc3, in drivers/usb/gadget/Kconfig)."""
+ return self.block.get_items()
+
+ def get_actual_items(self):
+ """A quirk (perhaps better described as a bug -- at least for symbols)
+ of kconfig is that you can put items within a choice that will not be
+ considered members of the choice insofar as selection is concerned.
+ This happens for example if one symbol within a choice 'depends on' the
+ symbol preceding it, or if you put non-symbol items within choices.
+
+ This function gets a list of the "proper" elements of the choice,
+ excluding such items."""
+ return self.actual_items
+
+ def get_parent(self):
+ """Returns the menu or choice statement that contains the choice, or
+ None if the choice is at the top level. Note that if statements are
+ treated as syntactic sugar and do not have an explicit class
+ representation."""
+ return self.parent
+
+ def get_referenced_symbols(self, refs_from_enclosing = False):
+ """See Symbol.get_referenced_symbols()."""
+ return self.all_referenced_syms if refs_from_enclosing else self.referenced_syms
+
+ def get_def_locations(self):
+ """Returns a list of (filename, linenr) tuples, where filename (string)
+ and linenr (int) represent a location where the choice is defined. For
+ the vast majority of choices this list will only contain one element,
+ but its possible for named choices to be defined in multiple
+ locations."""
+ return self.def_locations
+
+ def get_visibility(self):
+ """Returns the visibility of the choice statement: one of "n", "m" or
+ "y". This acts as an upper limit on the mode of the choice (though bool
+ choices can only have the mode "y"). See the class documentation for an
+ explanation of modes."""
+ return self._calc_visibility()
+
+ def calc_mode(self):
+ """Returns the mode of the choice. See the class documentation for
+ an explanation of modes."""
+ minimum_mode = "n" if self.optional else "m"
+
+ mode = self.user_mode if self.user_mode is not None else minimum_mode
+ mode = self.config._eval_min(mode, self._calc_visibility())
+
+ # Promote "m" to "y" for boolean choices
+ if mode == "m" and self.type == BOOL:
+ mode = "y"
+
+ return mode
+
+ def is_optional(self):
+ """Returns True if the symbol has the optional flag set (and so will default
+ to "n" mode). Otherwise, returns False."""
+ return self.optional
+
+ def __str__(self):
+ """Returns a string containing various information about the choice
+ statement."""
+ return self.config._get_sym_or_choice_str(self)
+
+ #
+ # Private methods
+ #
+
+ def __init__(self):
+ """Choice constructor -- not intended to be called directly by
+ kconfiglib clients."""
+
+ _HasVisibility.__init__(self)
+
+ self.config = None
+
+ self.parent = None
+ self.name = None # Yes, choices can be named
+ self.type = UNKNOWN
+ self.def_exprs = []
+ self.help = None
+ self.optional = False
+ self.block = None
+
+ # The prompts and default values without any dependencies from
+ # enclosing menus or if's propagated
+
+ self.orig_prompts = []
+ self.orig_def_exprs = []
+
+ # Dependencies inherited from containing menus and if's
+ self.deps_from_containing = None
+
+ # We need to filter out symbols that appear within the choice block but
+ # are not considered choice items (see
+ # Choice._determine_actual_items()) This list holds the "actual" choice
+ # items.
+ self.actual_items = []
+
+ # The set of symbols referenced by this choice (see
+ # get_referenced_symbols())
+ self.referenced_syms = set()
+
+ # Like 'referenced_syms', but includes symbols from
+ # dependencies inherited from enclosing menus and if's
+ self.all_referenced_syms = set()
+
+ # See Choice.get_def_locations()
+ self.def_locations = []
+
+ self.user_val = None
+ self.user_mode = None
+
+ self.cached_selection = None
+
+ def _determine_actual_items(self):
+ """If a symbol's visibility depends on the preceding symbol within a
+ choice, it is no longer viewed as a choice item (quite possibly a bug,
+ but some things consciously use it.. ugh. It stems from automatic
+ submenu creation). In addition, it's possible to have choices and
+ comments within choices, and those shouldn't be considered as choice
+ items either. Only drivers/usb/gadget/Kconfig seems to depend on any of
+ this. This method computes the "actual" items in the choice and sets
+ the is_choice_item_ flag on them (retrieved via is_choice_item()).
+
+ Don't let this scare you: an earlier version simply checked for a
+ sequence of symbols where all symbols after the first appeared in the
+ 'depends on' expression of the first, and that worked fine. The added
+ complexity is to be future-proof in the event that
+ drivers/usb/gadget/Kconfig turns even more sinister. It might very well
+ be overkilling things (especially if that file is refactored ;)."""
+
+ items = self.block.get_items()
+
+ # Items might depend on each other in a tree structure, so we need a
+ # stack to keep track of the current tentative parent
+ stack = []
+
+ for item in items:
+ if not isinstance(item, Symbol):
+ stack = []
+ continue
+
+ while stack != []:
+ if item._has_auto_menu_dep_on(stack[-1]):
+ # The item should not be viewed as a choice item, so don't
+ # set item.is_choice_item_.
+ stack.append(item)
+ break
+ else:
+ stack.pop()
+ else:
+ item.is_choice_item_ = True
+ self.actual_items.append(item)
+ stack.append(item)
+
+ def _cache_ret(self, selection):
+ # As None is used to indicate the lack of a cached value we can't use
+ # that to cache the fact that the choice has no selection. Instead, we
+ # use the symbolic constant NO_SELECTION.
+ if selection is None:
+ self.cached_selection = NO_SELECTION
+ else:
+ self.cached_selection = selection
+
+ return selection
+
+ def _get_user_mode(self):
+ return self.user_mode
+
+ def _invalidate(self):
+ _HasVisibility._invalidate(self)
+ self.cached_selection = None
+
+ def _reset(self):
+ self._invalidate()
+ self.user_val = None
+ self.user_mode = None
+
+ def _make_conf(self):
+ return self.block._make_conf()
+
+class Comment(Item):
+
+ """Represents a comment statement."""
+
+ #
+ # Public interface
+ #
+
+ def get_text(self):
+ """Returns the text of the comment."""
+ return self.text
+
+ def get_parent(self):
+ """Returns the menu or choice statement that contains the comment, or
+ None if the comment is at the top level. Note that if statements are
+ treated as syntactic sugar and do not have an explicit class
+ representation."""
+ return self.parent
+
+ def get_referenced_symbols(self, refs_from_enclosing = False):
+ """See Symbol.get_referenced_symbols()."""
+ return self.all_referenced_syms if refs_from_enclosing else self.referenced_syms
+
+ def get_location(self):
+ """Returns the location of the comment as a (filename, linenr) tuple,
+ where filename is a string and linenr an int."""
+ return (self.filename, self.linenr)
+
+ def __str__(self):
+ """Returns a string containing various information about the comment."""
+ dep_str = self.config._expr_val_str(self.orig_deps, "(no dependencies)")
+
+ additional_deps_str = " " + self.config._expr_val_str(self.deps_from_containing,
+ "(no additional dependencies)")
+
+ return _sep_lines("Comment",
+ "Text: " + str(self.text),
+ "Dependencies: " + dep_str,
+ "Additional dependencies from enclosing menus and if's:",
+ additional_deps_str,
+ "Location: {0}:{1}".format(self.filename, self.linenr))
+
+ #
+ # Private methods
+ #
+
+ def __init__(self):
+ """Comment constructor -- not intended to be called directly by
+ kconfiglib clients."""
+
+ self.config = None
+
+ self.parent = None
+ self.text = None
+ self.dep_expr = None
+
+ # Dependency expression without dependencies from enclosing menus and
+ # if's propagated
+ self.orig_deps = None
+
+ # Dependencies inherited from containing menus and if's
+ self.deps_from_containing = None
+
+ # The set of symbols referenced by this comment (see
+ # get_referenced_symbols())
+ self.referenced_syms = set()
+
+ # Like 'referenced_syms', but includes symbols from
+ # dependencies inherited from enclosing menus and if's
+ self.all_referenced_syms = None
+
+ self.filename = None
+ self.linenr = None
+
+ def _make_conf(self):
+ if self.config._eval_expr(self.dep_expr) != "n":
+ return ["\n#\n# {0}\n#".format(self.text)]
+ else:
+ return []
+
+class _Feed:
+
+ """Class for working with sequences in a stream-like fashion; handy for tokens."""
+
+ def __init__(self, items):
+ self.items = items
+ self.length = len(self.items)
+ self.i = 0
+
+ def get_next(self):
+ if self.i >= self.length:
+ return None
+
+ item = self.items[self.i]
+ self.i += 1
+ return item
+
+ def peek_next(self):
+ return None if self.i >= self.length else self.items[self.i]
+
+ def go_to_start(self):
+ self.i = 0
+
+ def __getitem__(self, index):
+ return self.items[index]
+
+ def __len__(self):
+ return len(self.items)
+
+ def is_empty(self):
+ return self.items == []
+
+ def is_at_end(self):
+ return self.i >= self.length
+
+ def check(self, token):
+ """Check if the next token is 'token'. If so, remove it from the token
+ feed and return True. Otherwise, leave it in and return False."""
+ if self.i >= self.length:
+ return None
+
+ if self.items[self.i] == token:
+ self.i += 1
+ return True
+
+ return False
+
+ def remove_while(self, pred):
+ while self.i < self.length and pred(self.items[self.i]):
+ self.i += 1
+
+ def go_back(self):
+ if self.i <= 0:
+ _internal_error("Attempt to move back in Feed while already at the beginning.")
+ self.i -= 1
+
+class _FileFeed(_Feed):
+
+ """Feed subclass that keeps track of the current filename and line
+ number."""
+
+ def __init__(self, lines, filename):
+ self.filename = _clean_up_path(filename)
+ _Feed.__init__(self, lines)
+
+ def get_filename(self):
+ return self.filename
+
+ def get_linenr(self):
+ return self.i
+
+#
+# Misc. public global utility functions
+#
+
+def tri_less(v1, v2):
+ """Returns True if the tristate v1 is less than the tristate v2, where "n",
+ "m" and "y" are ordered from lowest to highest. Otherwise, returns
+ False."""
+ return values[v1] < values[v2]
+
+def tri_less_eq(v1, v2):
+ """Returns True if the tristate v1 is less than or equal to the tristate
+ v2, where "n", "m" and "y" are ordered from lowest to highest. Otherwise,
+ returns False."""
+ return values[v1] <= values[v2]
+
+def tri_greater(v1, v2):
+ """Returns True if the tristate v1 is greater than the tristate v2, where
+ "n", "m" and "y" are ordered from lowest to highest. Otherwise, returns
+ False."""
+ return values[v1] > values[v2]
+
+def tri_greater_eq(v1, v2):
+ """Returns True if the tristate v1 is greater than or equal to the tristate
+ v2, where "n", "m" and "y" are ordered from lowest to highest. Otherwise,
+ returns False."""
+ return values[v1] >= values[v2]
+
+#
+# Helper functions, mostly related to text processing
+#
+
+def _strip_quotes(s, line, filename, linenr):
+ """Removes any quotes surrounding 's' if it has them; otherwise returns 's'
+ unmodified."""
+ s = s.strip()
+ if s[0] == '"' or s[0] == "'":
+ if len(s) < 2 or s[-1] != s[0]:
+ _parse_error(line,
+ "malformed string literal",
+ filename,
+ linenr)
+ return s[1:-1]
+ else:
+ return s
+
+def _indentation(line):
+ """Returns the indentation of the line, treating tab stops as being spaced
+ 8 characters apart."""
+ if line.isspace():
+ _internal_error("Attempt to take indentation of blank line.")
+ indent = 0
+ for c in line:
+ if c == " ":
+ indent += 1
+ elif c == "\t":
+ # Go to the next tab stop
+ indent = (indent + 8) & ~7
+ else:
+ return indent
+
+def _deindent(line, indent):
+ """Deindent 'line' by 'indent' spaces."""
+ line = line.expandtabs()
+ if len(line) <= indent:
+ return line
+ return line[indent:]
+
+def _is_hex(s):
+ return _is_base_n(s, 16)
+
+def _is_dec(s):
+ return _is_base_n(s, 10)
+
+def _is_base_n(s, n):
+ try:
+ int(s, n)
+ return True
+ except ValueError:
+ return False
+
+def _sep_lines(*args):
+ """Returns a string comprised of all arguments, with newlines inserted
+ between them."""
+ return "\n".join(args)
+
+def _comment(s):
+ """Returns a new string with "# " inserted before each line in 's'."""
+ return "\n".join(["# " + line for line in s.splitlines()])
+
+def _get_lines(filename):
+ """Returns a list of lines from 'filename', joining any line ending in \\
+ with the following line."""
+ with open(filename, "r") as f:
+ lines = []
+ accum = ""
+ while True:
+ line = f.readline()
+
+ if line == "":
+ return lines
+
+ if line.endswith("\\\n"):
+ accum += line[:-2]
+ else:
+ accum += line
+ lines.append(accum)
+ accum = ""
+
+def _strip_trailing_slash(path):
+ """Removes any trailing slash from 'path'."""
+ return path[:-1] if path.endswith("/") else path
+
+def _clean_up_path(path):
+ """Strips any initial "./" and trailing slash from 'path'."""
+ if path.startswith("./"):
+ path = path[2:]
+ return _strip_trailing_slash(path)
+
+#
+# Error handling
+#
+
+class Kconfig_Syntax_Error(Exception):
+ """Exception raised for syntax errors."""
+ pass
+
+class Internal_Error(Exception):
+ """Exception raised for internal errors."""
+ pass
+
+def _tokenization_error(s, index, filename, linenr):
+ if filename is not None:
+ assert linenr is not None
+ sys.stderr.write("{0}:{1}:\n".format(filename, linenr))
+
+ if s.endswith("\n"):
+ s = s[:-1]
+
+ # Calculate the visual offset corresponding to index 'index' in 's'
+ # assuming tabstops are spaced 8 characters apart
+ vis_index = 0
+ for c in s[:index]:
+ if c == "\t":
+ vis_index = (vis_index + 8) & ~7
+ else:
+ vis_index += 1
+
+ # Don't output actual tabs to be independent of how the terminal renders
+ # them
+ s = s.expandtabs()
+
+ raise Kconfig_Syntax_Error, (
+ _sep_lines("Error during tokenization at location indicated by caret.\n",
+ s,
+ " " * vis_index + "^\n"))
+
+def _parse_error(s, msg, filename, linenr):
+ error_str = ""
+
+ if filename is not None:
+ assert linenr is not None
+ error_str += "{0}:{1}: ".format(filename, linenr)
+
+ if s.endswith("\n"):
+ s = s[:-1]
+
+ error_str += 'Error while parsing "{0}"'.format(s)
+
+ if msg is None:
+ error_str += "."
+ else:
+ error_str += ": " + msg
+
+ raise Kconfig_Syntax_Error, error_str
+
+def _internal_error(msg):
+ msg += "\nSorry! You may want to send an email to kconfiglib@gmail.com " \
+ "to tell me about this. Include the message above and the stack " \
+ "trace and describe what you were doing."
+
+ raise Internal_Error, msg
+
+if use_psyco:
+ import psyco
+
+ Config._tokenize = psyco.proxy(Config._tokenize)
+ Config._eval_expr = psyco.proxy(Config._eval_expr)
+
+ _indentation = psyco.proxy(_indentation)
+ _get_lines = psyco.proxy(_get_lines)
diff --git a/scripts/kconfig/kconfigtest.py b/scripts/kconfig/kconfigtest.py
new file mode 100644
index 0000000..9d27dca
--- /dev/null
+++ b/scripts/kconfig/kconfigtest.py
@@ -0,0 +1,396 @@
+# This is a test suite for kconfiglib, primarily testing compatibility with the
+# C kconfig implementation by comparing outputs. It should be run from the
+# top-level kernel directory with
+#
+# $ PYTHONPATH=scripts/kconfig python scripts/kconfig/kconfigtest.py
+#
+# Note that running these could take a long time: running all tests on a Core
+# i7@2.67 GHz takes ~2 hours. The tests have been arranged in order of time
+# needed.
+#
+# All tests should pass. Report regressions to kconfiglib@gmail.com
+
+import kconfiglib
+import os
+import re
+import subprocess
+import sys
+
+# Assume that the value of KERNELVERSION does not affect the configuration
+# (true as of Linux 2.6.38-rc3). Here we could fetch the correct version
+# instead.
+os.environ["KERNELVERSION"] = "2"
+
+# Number of arch/defconfig pairs tested so far
+nconfigs = 0
+
+def run_tests():
+ # The set of tests that want to run for all architectures in the kernel
+ # tree -- currently, all tests. The boolean flag indicates whether .config
+ # (generated by the C implementation) should be compared to ._config
+ # (generated by us) after each invocation.
+ all_arch_tests = [(test_all_no, True),
+ (test_config_absent, True),
+ (test_all_yes, True),
+ (test_call_all, False),
+ # Needs to report success/failure for each arch/defconfig
+ # combo, hence False.
+ (test_defconfig, False)]
+
+ print "Loading Config instances for all architectures..."
+ arch_configs = get_arch_configs()
+
+ for (test_fn, compare_configs) in all_arch_tests:
+ print "Resetting all architecture Config instances prior to next test..."
+ for arch in arch_configs:
+ arch.reset()
+
+ # The test description is taken from the docstring of the corresponding
+ # function
+ print test_fn.__doc__
+
+ for conf in arch_configs:
+ rm_configs()
+
+ # This should be set correctly for any 'make *config' commands the
+ # test might run
+ os.environ["ARCH"] = conf.get_arch()
+
+ test_fn(conf)
+
+ if compare_configs:
+ sys.stdout.write(" {0:<14}".format(conf.get_arch()))
+
+ if equal_confs():
+ print "OK"
+ else:
+ print "FAIL"
+ fail()
+
+ print ""
+
+ if all_ok():
+ print "All OK"
+ print nconfigs, "arch/defconfig pairs tested"
+ else:
+ print "Some tests failed"
+
+def get_arch_configs():
+ """Returns a list with Config instances corresponding to all arch Kconfigs."""
+
+ def add_arch(ARCH, res):
+ os.environ["SRCARCH"] = archdir
+ os.environ["ARCH"] = ARCH
+ res.append(kconfiglib.Config())
+
+ res = []
+
+ # Nothing looks at this as of Linux 2.6.38-rc3
+ os.environ["KERNELVERSION"] = "2"
+
+ for archdir in os.listdir("arch"):
+ if archdir == "h8300":
+ # Broken Kconfig as of Linux 2.6.38-rc3
+ continue
+
+ if os.path.exists(os.path.join("arch", archdir, "Kconfig")):
+ if archdir == "x86":
+ add_arch("i386", res)
+ add_arch("x86_64", res)
+ elif archdir == "sparc":
+ add_arch("sparc32", res)
+ add_arch("sparc64", res)
+ elif archdir == "sh":
+ add_arch("sh64", res)
+ else:
+ # For most architectures, ARCH = SRCARCH
+ add_arch(archdir, res)
+
+ # Don't want subsequent 'make *config' commands in tests to see this
+ del os.environ["ARCH"]
+ del os.environ["SRCARCH"]
+
+ return res
+
+def test_all_no(conf):
+ """Test if our allnoconfig implementation generates the same .config as 'make allnoconfig', for all architectures"""
+
+ while True:
+ done = True
+
+ for sym in conf:
+ # Choices take care of themselves for allnoconf, so we only need to
+ # worry about non-choice symbols
+ if not sym.is_choice_item():
+ lower_bound = sym.get_lower_bound()
+
+ # If we can assign a lower value to the symbol (where "n", "m" and
+ # "y" are ordered from lowest to highest), then do so.
+ # lower_bound() returns None for symbols whose values cannot
+ # (currently) be changed, as well as for non-bool, non-tristate
+ # symbols.
+ if lower_bound is not None and \
+ kconfiglib.tri_less(lower_bound, sym.calc_value()):
+
+ sym.set_value(lower_bound)
+
+ # We just changed the value of some symbol. As this may effect
+ # other symbols, we need to keep looping.
+ done = False
+
+ if done:
+ break
+
+ conf.write_config("._config")
+
+ shell("make allnoconfig")
+
+def test_all_yes(conf):
+ """Test if our allyesconfig implementation generates the same .config as 'make allyesconfig', for all architectures"""
+
+ # Get a list of all symbols that are not choice items
+ non_choice_syms = [sym for sym in conf.get_symbols() if
+ not sym.is_choice_item()]
+
+ while True:
+ done = True
+
+ # Handle symbols outside of choices
+
+ for sym in non_choice_syms:
+ upper_bound = sym.get_upper_bound()
+
+ # See corresponding comment for allnoconf implementation
+ if upper_bound is not None and \
+ kconfiglib.tri_less(sym.calc_value(), upper_bound):
+ sym.set_value(upper_bound)
+ done = False
+
+ # Handle symbols within choices
+
+ for choice in conf.get_choices():
+
+ # Handle choices whose visibility allow them to be in "y" mode
+
+ if choice.get_visibility() == "y":
+ selection = choice.get_selection_from_defaults()
+ if selection is not None and \
+ selection is not choice.get_user_selection():
+ selection.set_value("y")
+ done = False
+
+ # Handle choices whose visibility only allow them to be in "m" mode
+
+ elif choice.get_visibility() == "m":
+ for sym in choice.get_items():
+ if sym.calc_value() != "m" and \
+ sym.get_upper_bound() != "n":
+ sym.set_value("m")
+ done = False
+
+
+ if done:
+ break
+
+ conf.write_config("._config")
+
+ shell("make allyesconfig")
+
+def test_call_all(conf):
+ """Call all public methods on all symbols, menus, choices and comments (nearly all public methods: some are hard to test like this, but are exercised by other tests) for all architectures to make sure we never crash or hang"""
+ print " For {0}...".format(conf.get_arch())
+
+ conf.get_arch()
+ conf.get_defconfig_filename()
+ conf.get_top_level_items()
+ conf.eval("y && ARCH")
+
+ # Syntax error
+ caught_exception = False
+ try:
+ conf.eval("y & y")
+ except kconfiglib.Kconfig_Syntax_Error:
+ caught_exception = True
+
+ if not caught_exception:
+ print "Fail: no exception generated for expression with syntax error"
+ fail()
+
+ conf.get_config_header()
+ conf.get_base_dir()
+ conf.reset()
+ conf.get_symbols(False)
+ conf.get_mainmenu_text()
+
+ for s in conf.get_symbols():
+ s.reset()
+ s.calc_value()
+ s.calc_default_value()
+ s.get_user_value()
+ s.get_name()
+ s.get_upper_bound()
+ s.get_lower_bound()
+ s.get_assignable_values()
+ s.get_type()
+ s.get_visibility()
+ s.get_parent()
+ s.get_sibling_symbols()
+ s.get_sibling_items()
+ s.get_referenced_symbols()
+ s.get_referenced_symbols(True)
+ s.get_selected_symbols()
+ s.get_help()
+ s.get_config()
+ s.get_def_locations()
+ s.get_ref_locations()
+ s.is_modifiable()
+ s.is_defined()
+ s.is_special()
+ s.is_from_environment()
+ s.has_ranges()
+ s.is_choice_item()
+ s.is_choice_selection()
+ s.__str__()
+
+ for c in conf.get_choices():
+ if c.get_name() is not None:
+ print "LOOOOOOOOL", c.get_name()
+ c.get_selection()
+ c.get_selection_from_defaults()
+ c.get_user_selection()
+ c.get_type()
+ c.get_name()
+ c.get_items()
+ c.get_actual_items()
+ c.get_parent()
+ c.get_referenced_symbols()
+ c.get_referenced_symbols(True)
+ c.get_def_locations()
+ c.get_visibility()
+ c.calc_mode()
+ c.is_optional()
+ c.__str__()
+
+ for m in conf.get_menus():
+ m.get_items()
+ m.get_symbols(False)
+ m.get_symbols(True)
+ m.get_depends_on_visibility()
+ m.get_visible_if_visibility()
+ m.get_title()
+ m.get_parent()
+ m.get_referenced_symbols()
+ m.get_referenced_symbols(True)
+ m.get_location()
+ m.__str__()
+
+ for c in conf.get_comments():
+ c.get_text()
+ c.get_parent()
+ c.get_referenced_symbols()
+ c.get_referenced_symbols(True)
+ c.get_location()
+ c.__str__()
+
+def test_config_absent(conf):
+ """Test if kconfiglib generates the same configuration as 'conf' without a .config, for each architecture"""
+ conf.write_config("._config")
+
+ # Use an empty .config
+ shell("> .config")
+ shell("make kconfiglibtestconfig")
+
+def test_defconfig(conf):
+ """Test if kconfiglib generates the same .config as conf for each architecture/defconfig pair (this takes two hours on a Core i7@2.67 GHz system)"""
+ # Collect defconfigs. This could be done once instead, but it's a speedy
+ # operation comparatively.
+
+ global nconfigs
+
+ defconfigs = []
+
+ for arch in os.listdir("arch"):
+ arch_dir = os.path.join("arch", arch)
+
+ # Some arches have a "defconfig" in their
+ # arch directory.
+ defconfig = os.path.join(arch_dir, "defconfig")
+ if os.path.exists(defconfig):
+ defconfigs.append(defconfig)
+
+ defconfigs_dir = os.path.join(arch_dir, "configs")
+ if os.path.isdir(defconfigs_dir):
+ for c in os.listdir(defconfigs_dir):
+ defconfig = os.path.join(defconfigs_dir, c)
+ if os.path.isfile(defconfig):
+ defconfigs.append(defconfig)
+
+ # Test architecture for each defconfig
+
+ for defconfig in defconfigs:
+ rm_configs()
+
+ nconfigs += 1
+
+ conf.load_config(defconfig)
+ conf.write_config("._config")
+ shell("cp {0} .config".format(defconfig))
+ shell("make kconfiglibtestconfig")
+
+ sys.stdout.write(" {0:<14}with {1:<60} ".format(conf.get_arch(), defconfig))
+
+ if equal_confs():
+ print "OK"
+ else:
+ print "FAIL"
+ fail()
+
+#
+# Helper functions
+#
+
+def shell(cmd):
+ subprocess.Popen(cmd,
+ shell = True,
+ stdout = subprocess.PIPE,
+ stderr = subprocess.PIPE).wait()
+
+def rm_configs():
+ """Delete any old ".config" (generated by the C implementation) and
+ "._config" (generated by us), if present."""
+ def rm_if_exists(f):
+ if os.path.exists(f):
+ os.remove(f)
+
+ rm_if_exists(".config")
+ rm_if_exists("._config")
+
+def equal_confs():
+ with open(".config") as menu_conf:
+ l1 = menu_conf.readlines()
+
+ with open("._config") as my_conf:
+ l2 = my_conf.readlines()
+
+ # Skip the header generated by 'conf'
+ unset_re = r"# CONFIG_(\w+) is not set"
+ i = 0
+ for line in l1:
+ if not line.startswith("#") or \
+ re.match(unset_re, line):
+ break
+ i += 1
+
+ return (l1[i:] == l2)
+
+_all_ok = True
+
+def fail():
+ global _all_ok
+ _all_ok = False
+
+def all_ok():
+ return _all_ok
+
+if __name__ == "__main__":
+ run_tests()
--
1.7.0.4


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