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Subject[PATCH 10/26] tags and cscope support really belongs in a shell script
Date
Moving the support to a shell script has several benefits:
- The readability of the code has increased a lot
- More people is able to extend the tags support
- We see less changes to the top-level Makefile

The shell script version includes improvements from:
Alexey Dobriyan <adobriyan@gmail.com> (jump to kconfig symbols)
Alexey Dobriyan <adobriyan@gmail.com> (drop ./ in paths)
Ian Campbell <ijc@hellion.org.uk> (simplified find algorithms)

This version has a few caveats:
=> It does not support ALLSOURCE_ARCHS
- it is easy to add if it is really used
=> It assumes all archs have moved to arch/$ARCH/include
- until that happens we have a few additional hits in the archs

Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Cc: Alexey Dobriyan <adobriyan@gmail.com>
Tested-by: Ian Campbell <ijc@hellion.org.uk>
---
Makefile | 117 +---------------------------------------
scripts/tags.sh | 160 +++++++++++++++++++++++++++++++++++++++++++++++++++++++
2 files changed, 163 insertions(+), 114 deletions(-)
create mode 100755 scripts/tags.sh
diff --git a/Makefile b/Makefile
index 3a6ac68..be462cf 100644
--- a/Makefile
+++ b/Makefile
@@ -1409,123 +1409,12 @@ endif # KBUILD_EXTMOD

# Generate tags for editors
# ---------------------------------------------------------------------------
+quiet_cmd_tags = GEN $@
+ cmd_tags = $(CONFIG_SHELL) $(srctree)/scripts/tags.sh $@

-#We want __srctree to totally vanish out when KBUILD_OUTPUT is not set
-#(which is the most common case IMHO) to avoid unneeded clutter in the big tags file.
-#Adding $(srctree) adds about 20M on i386 to the size of the output file!
-
-ifeq ($(src),$(obj))
-__srctree =
-else
-__srctree = $(srctree)/
-endif
-
-ifeq ($(ALLSOURCE_ARCHS),)
-ifeq ($(ARCH),um)
-ALLINCLUDE_ARCHS := $(ARCH) $(SUBARCH)
-else
-ALLINCLUDE_ARCHS := $(SRCARCH)
-endif
-else
-#Allow user to specify only ALLSOURCE_PATHS on the command line, keeping existing behaviour.
-ALLINCLUDE_ARCHS := $(ALLSOURCE_ARCHS)
-endif
-
-ALLSOURCE_ARCHS := $(SRCARCH)
-
-define find-sources
- ( for arch in $(ALLSOURCE_ARCHS) ; do \
- find $(__srctree)arch/$${arch} $(RCS_FIND_IGNORE) \
- -wholename $(__srctree)arch/$${arch}/include/asm -type d -prune \
- -o -name $1 -print; \
- done ; \
- find $(__srctree)security/selinux/include $(RCS_FIND_IGNORE) \
- -name $1 -print; \
- find $(__srctree)include $(RCS_FIND_IGNORE) \
- \( -name config -o -name 'asm-*' \) -prune \
- -o -name $1 -print; \
- for arch in $(ALLINCLUDE_ARCHS) ; do \
- test -e $(__srctree)include/asm-$${arch} && \
- find $(__srctree)include/asm-$${arch} $(RCS_FIND_IGNORE) \
- -name $1 -print; \
- test -e $(__srctree)arch/$${arch}/include/asm && \
- find $(__srctree)arch/$${arch}/include/asm $(RCS_FIND_IGNORE) \
- -name $1 -print; \
- done ; \
- find $(__srctree)include/asm-generic $(RCS_FIND_IGNORE) \
- -name $1 -print; \
- find $(__srctree) $(RCS_FIND_IGNORE) \
- \( -name include -o -name arch -o -name '.tmp_*' \) -prune -o \
- -name $1 -print; \
- )
-endef
-
-define all-sources
- $(call find-sources,'*.[chS]')
-endef
-define all-kconfigs
- $(call find-sources,'Kconfig*')
-endef
-define all-defconfigs
- $(call find-sources,'defconfig')
-endef
-
-define xtags
- if $1 --version 2>&1 | grep -iq exuberant; then \
- $(all-sources) | xargs $1 -a \
- -I __initdata,__exitdata,__acquires,__releases \
- -I __read_mostly,____cacheline_aligned,____cacheline_aligned_in_smp,____cacheline_internodealigned_in_smp \
- -I EXPORT_SYMBOL,EXPORT_SYMBOL_GPL \
- --extra=+f --c-kinds=+px \
- --regex-asm='/^ENTRY\(([^)]*)\).*/\1/'; \
- $(all-kconfigs) | xargs $1 -a \
- --langdef=kconfig \
- --language-force=kconfig \
- --regex-kconfig='/^[[:blank:]]*(menu|)config[[:blank:]]+([[:alnum:]_]+)/\2/'; \
- $(all-defconfigs) | xargs -r $1 -a \
- --langdef=dotconfig \
- --language-force=dotconfig \
- --regex-dotconfig='/^#?[[:blank:]]*(CONFIG_[[:alnum:]_]+)/\1/'; \
- elif $1 --version 2>&1 | grep -iq emacs; then \
- $(all-sources) | xargs $1 -a; \
- $(all-kconfigs) | xargs $1 -a \
- --regex='/^[ \t]*\(\(menu\)*config\)[ \t]+\([a-zA-Z0-9_]+\)/\3/'; \
- $(all-defconfigs) | xargs -r $1 -a \
- --regex='/^#?[ \t]?\(CONFIG_[a-zA-Z0-9_]+\)/\1/'; \
- else \
- $(all-sources) | xargs $1 -a; \
- fi
-endef
-
-quiet_cmd_cscope-file = FILELST cscope.files
- cmd_cscope-file = (echo \-k; echo \-q; $(all-sources)) > cscope.files
-
-quiet_cmd_cscope = MAKE cscope.out
- cmd_cscope = cscope -b -f cscope.out
-
-cscope: FORCE
- $(call cmd,cscope-file)
- $(call cmd,cscope)
-
-quiet_cmd_TAGS = MAKE $@
-define cmd_TAGS
- rm -f $@; \
- $(call xtags,etags)
-endef
-
-TAGS: FORCE
- $(call cmd,TAGS)
-
-quiet_cmd_tags = MAKE $@
-define cmd_tags
- rm -f $@; \
- $(call xtags,ctags)
-endef
-
-tags: FORCE
+tags TAGS cscope: FORCE
$(call cmd,tags)

-
# Scripts to check various things for consistency
# ---------------------------------------------------------------------------

diff --git a/scripts/tags.sh b/scripts/tags.sh
new file mode 100755
index 0000000..47274dc
--- /dev/null
+++ b/scripts/tags.sh
@@ -0,0 +1,160 @@
+#!/bin/sh
+# Generate tags or cscope files
+# Usage tags.sh <mode>
+#
+# mode may be any of: tags, TAGS, cscope
+#
+# Uses the following environment variables:
+# ARCH, SUBARCH, srctree, src, obj
+
+if [ $KBUILD_VERBOSE == 1 ]; then
+ set -x
+fi
+
+# This is a duplicate of RCS_FIND_IGNORE without escaped '()'
+ignore="( -name SCCS -o -name BitKeeper -o -name .svn -o \
+ -name CVS -o -name .pc -o -name .hg -o \
+ -name .git ) \
+ -prune -o"
+
+# Do not use full path is we do not use O=.. builds
+if [ ${src} == ${obj} ]; then
+ tree=
+else
+ tree=${srctree}
+fi
+
+# find sources in arch/$ARCH
+find_arch_sources()
+{
+ find ${tree}arch/$1 $ignore -name $2 -print;
+}
+
+# find sources in arch/$1/include
+find_arch_include_sources()
+{
+ find ${tree}arch/$1/include $ignore -name $2 -print;
+}
+
+# find sources in include/
+find_include_sources()
+{
+ find ${tree}include $ignore -name config -prune -o -name $1 -print;
+}
+
+# find sources in rest of tree
+# we could benefit from a list of dirs to search in here
+find_other_sources()
+{
+ find ${tree}* $ignore \
+ \( -name include -o -name arch -o -name '.tmp_*' \) -prune -o \
+ -name $1 -print;
+}
+
+find_sources()
+{
+ find_arch_sources $1 $2
+ find_include_sources $2
+ find_other_sources $2
+}
+
+all_sources()
+{
+ find_sources $SRCARCH *.[chS]
+ if [ ! -z "$archinclude" ]; then
+ find_arch_include_sources $archinclude *.[chS]
+ fi
+}
+
+all_kconfigs()
+{
+ find_sources $SRCARCH "Kconfig*"
+}
+
+all_defconfigs()
+{
+ find_sources $SRCARCH "defconfig"
+}
+
+docscope()
+{
+ (echo \-k; echo \-q; all_sources) > cscope.files
+ cscope -b -f cscope.out
+}
+
+exuberant()
+{
+ all_sources > all
+ all_sources | xargs $1 -a \
+ -I __initdata,__exitdata,__acquires,__releases \
+ -I __read_mostly,____cacheline_aligned \
+ -I ____cacheline_aligned_in_smp \
+ -I ____cacheline_internodealigned_in_smp \
+ -I EXPORT_SYMBOL,EXPORT_SYMBOL_GPL \
+ --extra=+f --c-kinds=+px \
+ --regex-asm='/^ENTRY\(([^)]*)\).*/\1/'
+
+ all_kconfigs | xargs $1 -a \
+ --langdef=kconfig --language-force=kconfig \
+ --regex-kconfig='/^[[:blank:]]*(menu|)config[[:blank:]]+([[:alnum:]_]+)/\2/'
+
+ all_kconfigs | xargs $1 -a \
+ --langdef=kconfig --language-force=kconfig \
+ --regex-kconfig='/^[[:blank:]]*(menu|)config[[:blank:]]+([[:alnum:]_]+)/CONFIG_\2/'
+
+ all_defconfigs | xargs -r $1 -a \
+ --langdef=dotconfig --language-force=dotconfig \
+ --regex-dotconfig='/^#?[[:blank:]]*(CONFIG_[[:alnum:]_]+)/\1/'
+
+}
+
+emacs()
+{
+ all_sources | xargs $1 -a
+
+ all_kconfigs | xargs $1 -a \
+ --regex='/^[ \t]*\(\(menu\)*config\)[ \t]+\([a-zA-Z0-9_]+\)/\3/'
+
+ all_kconfigs | xargs $1 -a \
+ --regex='/^[ \t]*\(\(menu\)*config\)[ \t]+\([a-zA-Z0-9_]+\)/CONFIG_\3/'
+
+ all_defconfigs | xargs -r $1 -a \
+ --regex='/^#?[ \t]?\(CONFIG_[a-zA-Z0-9_]+\)/\1/'
+}
+
+xtags()
+{
+ if $1 --version 2>&1 | grep -iq exuberant; then
+ exuberant $1
+ elif $1 --version 2>&1 | grep -iq emacs; then
+ emacs $1
+ else
+ all_sources | xargs $1 -a
+ fi
+}
+
+
+# Support um (which uses SUBARCH)
+if [ ${ARCH} == um ]; then
+ if [ $SUBARCH == i386 ]; then
+ archinclude=x86
+ elif [ $SUBARCH == x86_64 ]; then
+ archinclude=x86
+ else
+ archinclude=${SUBARCH}
+ fi
+fi
+
+case "$1" in
+ "cscope")
+ docscope
+ ;;
+
+ "tags")
+ xtags ctags
+ ;;
+
+ "TAGS")
+ xtags etags
+ ;;
+esac
--
1.6.0.2.GIT


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