scripts/get_maintainer.pl: add patch/file search for keywords

Based on an idea from Wolfram Sang.

Add search for MAINTAINERS line "K:" regex pattern match in a patch or file
Matches are added after file pattern matches
Add --keywords command line switch (default 1, on)
Change version to 0.21

Signed-off-by: Joe Perches <joe@perches.com>
Cc: Wolfram Sang <w.sang@pengutronix.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

diff --git a/scripts/get_maintainer.pl b/scripts/get_maintainer.pl
index cdb44b6..102b766 100755 (executable)
--- a/scripts/get_maintainer.pl
+++ b/scripts/get_maintainer.pl
@@ -13,7 +13,7 @@
 use strict;
 
 my $P = $0;
-my $V = '0.20';
+my $V = '0.21';
 
 use Getopt::Long qw(:config no_auto_abbrev);
 
@@ -37,6 +37,7 @@ my $scm = 0;
 my $web = 0;
 my $subsystem = 0;
 my $status = 0;
+my $keywords = 1;
 my $from_filename = 0;
 my $pattern_depth = 0;
 my $version = 0;
@@ -84,6 +85,7 @@ if (!GetOptions(
                'scm!' => \$scm,
                'web!' => \$web,
                'pattern-depth=i' => \$pattern_depth,
+               'k|keywords!' => \$keywords,
                'f|file' => \$from_filename,
                'v|version' => \$version,
                'h|help' => \$help,
@@ -132,6 +134,8 @@ if (!top_of_kernel_tree($lk_path)) {
 ## Read MAINTAINERS for type/value pairs
 
 my @typevalue = ();
+my %keyword_hash;
+
 open(MAINT, "<${lk_path}MAINTAINERS") || die "$P: Can't open MAINTAINERS\n";
 while (<MAINT>) {
     my $line = $_;
@@ -149,6 +153,8 @@ while (<MAINT>) {
            if ((-d $value)) {
                $value =~ s@([^/])$@$1/@;
            }
+       } elsif ($type eq "K") {
+           $keyword_hash{@typevalue} = $value;
        }
        push(@typevalue, "$type:$value");
     } elsif (!/^(\s)*$/) {
@@ -188,6 +194,7 @@ if ($email_remove_duplicates) {
 
 my @files = ();
 my @range = ();
+my @keyword_tvi = ();
 
 foreach my $file (@ARGV) {
     ##if $file is a directory and it lacks a trailing slash, add one
@@ -198,11 +205,24 @@ foreach my $file (@ARGV) {
     }
     if ($from_filename) {
        push(@files, $file);
+       if (-f $file && $keywords) {
+           open(FILE, "<$file") or die "$P: Can't open ${file}\n";
+           while (<FILE>) {
+               my $patch_line = $_;
+               foreach my $line (keys %keyword_hash) {
+                   if ($patch_line =~ m/^.*$keyword_hash{$line}/x) {
+                       push(@keyword_tvi, $line);
+                   }
+               }
+           }
+           close(FILE);
+       }
     } else {
        my $file_cnt = @files;
        my $lastfile;
        open(PATCH, "<$file") or die "$P: Can't open ${file}\n";
        while (<PATCH>) {
+           my $patch_line = $_;
            if (m/^\+\+\+\s+(\S+)/) {
                my $filename = $1;
                $filename =~ s@^[^/]*/@@;
@@ -213,6 +233,12 @@ foreach my $file (@ARGV) {
                if ($email_git_blame) {
                    push(@range, "$lastfile:$1:$2");
                }
+           } elsif ($keywords) {
+               foreach my $line (keys %keyword_hash) {
+                   if ($patch_line =~ m/^[+-].*$keyword_hash{$line}/x) {
+                       push(@keyword_tvi, $line);
+                   }
+               }
            }
        }
        close(PATCH);
@@ -286,6 +312,13 @@ foreach my $file (@files) {
     }
 }
 
+if ($keywords) {
+    @keyword_tvi = sort_and_uniq(@keyword_tvi);
+    foreach my $line (@keyword_tvi) {
+       add_categories($line);
+    }
+}
+
 if ($email) {
     foreach my $chief (@penguin_chief) {
        if ($chief =~ m/^(.*):(.*)/) {
@@ -384,6 +417,7 @@ Output type options:
 
 Other options:
   --pattern-depth => Number of pattern directory traversals (default: 0 (all))
+  --keywords => scan patch for keywords (default: 1 (on))
   --version => show version
   --help => show this help information
 
@@ -486,7 +520,6 @@ sub format_email {
 }
 
 sub find_starting_index {
-
     my ($index) = @_;
 
     while ($index > 0) {