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Subject[PATCH v2 10/11] scripts/get_abi.pl: add support for searching for ABI symbols
Date
Change its syntax to allow switching between ReST output mode
and a new search mode, with allows to seek for ABI symbols
using rejex.

Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
---
scripts/get_abi.pl | 112 ++++++++++++++++++++++++++++++++++++++++++++++++-----
1 file changed, 103 insertions(+), 9 deletions(-)

diff --git a/scripts/get_abi.pl b/scripts/get_abi.pl
index d437e148b1c0..eb62385630e6 100755
--- a/scripts/get_abi.pl
+++ b/scripts/get_abi.pl
@@ -9,9 +9,11 @@ use Fcntl ':mode';
my $help;
my $man;
my $debug;
+my $prefix="Documentation/ABI";

GetOptions(
"debug|d+" => \$debug,
+ "dir=s" => \$prefix,
'help|?' => \$help,
man => \$man
) or pod2usage(2);
@@ -19,9 +21,12 @@ GetOptions(
pod2usage(1) if $help;
pod2usage(-exitstatus => 0, -verbose => 2) if $man;

-pod2usage(2) if (scalar @ARGV != 1);
+pod2usage(2) if (scalar @ARGV < 1 || @ARGV > 2);

-my ($prefix) = @ARGV;
+my ($cmd, $arg) = @ARGV;
+
+pod2usage(2) if ($cmd ne "search" && $cmd ne "rest");
+pod2usage(2) if ($cmd eq "search" && !$arg);

require Data::Dumper if ($debug);

@@ -53,6 +58,7 @@ sub parse_abi {
$data{$nametag}->{what} = "File $name";
$data{$nametag}->{type} = "File";
$data{$nametag}->{file} = $name;
+ $data{$nametag}->{filepath} = $file;
$data{$nametag}->{is_file} = 1;

my $type = $file;
@@ -115,6 +121,7 @@ sub parse_abi {

$data{$what}->{type} = $type;
$data{$what}->{file} = $name;
+ $data{$what}->{filepath} = $file;
print STDERR "\twhat: $what\n" if ($debug > 1);
}

@@ -183,7 +190,9 @@ sub parse_abi {
close IN;
}

-# Outputs the output on ReST format
+#
+# Outputs the book on ReST format
+#
sub output_rest {
foreach my $what (sort keys %data) {
my $type = $data{$what}->{type};
@@ -263,6 +272,45 @@ sub output_rest {
}

#
+# Searches for ABI symbols
+#
+sub search_symbols {
+ foreach my $what (sort keys %data) {
+ next if (!($what =~ m/($arg)/));
+
+ my $type = $data{$what}->{type};
+ next if ($type eq "File");
+
+ my $file = $data{$what}->{filepath};
+
+ my $bar = $what;
+ $bar =~ s/./-/g;
+
+ print "\n$what\n$bar\n\n";
+
+ my $kernelversion = $data{$what}->{kernelversion};
+ my $contact = $data{$what}->{contact};
+ my $users = $data{$what}->{users};
+ my $date = $data{$what}->{date};
+ my $desc = $data{$what}->{description};
+ $kernelversion =~ s/^\s+//;
+ $contact =~ s/^\s+//;
+ $users =~ s/^\s+//;
+ $users =~ s/\n//g;
+ $date =~ s/^\s+//;
+ $desc =~ s/^\s+//;
+
+ printf "Kernel version:\t\t%s\n", $kernelversion if ($kernelversion);
+ printf "Date:\t\t\t%s\n", $date if ($date);
+ printf "Contact:\t\t%s\n", $contact if ($contact);
+ printf "Users:\t\t\t%s\n", $users if ($users);
+ print "Defined on file:\t$file\n\n";
+ print "Description:\n\n$desc";
+ }
+}
+
+
+#
# Parses all ABI files located at $prefix dir
#
find({wanted =>\&parse_abi, no_chdir => 1}, $prefix);
@@ -270,9 +318,13 @@ find({wanted =>\&parse_abi, no_chdir => 1}, $prefix);
print STDERR Data::Dumper->Dump([\%data], [qw(*data)]) if ($debug);

#
-# Outputs an ReST file with the ABI contents
+# Handles the command
#
-output_rest
+if ($cmd eq "rest") {
+ output_rest;
+} else {
+ search_symbols;
+}


__END__
@@ -283,12 +335,27 @@ abi_book.pl - parse the Linux ABI files and produce a ReST book.

=head1 SYNOPSIS

-B<abi_book.pl> [--debug] <ABI_DIR>]
+B<abi_book.pl> [--debug] <COMAND> [<ARGUMENT>]
+
+Where <COMMAND> can be:
+
+=over 8
+
+B<search> [SEARCH_REJEX] - search for [SEARCH_REJEX] inside ABI
+
+B<rest> - output the ABI in ReST markup language
+
+=back

=head1 OPTIONS

=over 8

+=item B<--dir>
+
+Changes the location of the ABI search. By default, it uses
+the Documentation/ABI directory.
+
=item B<--debug>

Put the script in verbose mode, useful for debugging. Can be called multiple
@@ -306,8 +373,35 @@ Prints the manual page and exits.

=head1 DESCRIPTION

-Parse the Linux ABI files from ABI DIR (usually located at Documentation/ABI)
-and produce a ReST book containing the Linux ABI.
+Parse the Linux ABI files from ABI DIR (usually located at Documentation/ABI),
+allowing to search for ABI symbols or to produce a ReST book containing
+the Linux ABI documentation.
+
+=head1 EXAMPLES
+
+Search for all stable symbols with the word "usb":
+
+=over 8
+
+$ scripts/get_abi.pl search usb --dir Documentation/ABI/stable
+
+=back
+
+Search for all symbols that match the rejex expression "usb.*cap":
+
+=over 8
+
+$ scripts/get_abi.pl search usb.*cap
+
+=back
+
+Output all obsoleted symbols in ReST format
+
+=over 8
+
+$ scripts/get_abi.pl rest --dir Documentation/ABI/obsolete
+
+=back

=head1 BUGS

@@ -315,7 +409,7 @@ Report bugs to Mauro Carvalho Chehab <mchehab@s-opensource.com>

=head1 COPYRIGHT

-Copyright (c) 2016 by Mauro Carvalho Chehab <mchehab@s-opensource.com>.
+Copyright (c) 2016-2017 by Mauro Carvalho Chehab <mchehab@s-opensource.com>.

License GPLv2: GNU GPL version 2 <http://gnu.org/licenses/gpl.html>.

--
2.9.3
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