X-Git-Url: http://git.shiar.nl/git-grep-footer.git/blobdiff_plain/a2dafecdb7c17647dc010cc8d9f37bbf1d94f79d..2c1ffa9b657f6addb2536597a32714d78fac12de:/git-grep-footer

diff --git a/git-grep-footer b/git-grep-footer
index fa417c1..a868319 100755
--- a/git-grep-footer
+++ b/git-grep-footer
@@ -9,10 +9,12 @@ use Getopt::Long qw(:config bundling);
 
 GetOptions(\my %opt,
 	'debug!',
+	'',  # stdin
 	'count|c!',
 	'simplify|s:s',
 	'ignore-case|i!',
 	'fuzzy!',
+	'grep|S=s',
 	'min|min-count|unique|u:i',
 	'max|max-count|show|n:i',
 	'version|V'  => sub { Getopt::Long::VersionMessage() },
@@ -20,14 +22,19 @@ GetOptions(\my %opt,
 	'help|man|?' => sub { Getopt::Long::HelpMessage(-verbose => 2) },
 ) or exit 129;
 
+my $inputstream = $opt{''} ? \*ARGV : eval {
+	require Git;
+	Git::command_output_pipe('log', '-z', '--pretty=format:%b', @ARGV);
+} || die "Automatic git log failed: $@";
+
 local $| = 1;
 local $/ = "\0";
 
-my $HEADERMATCH = qr/ [a-z]+ (?: (?:-\w+)+ | \ by ) /ix;
+my $HEADERMATCH = qr/ [a-z]+ (?: (?:-\w+)+ | \ by ) | cc | reference /ix;
 
 my (%headercount, @headercache);
 
-while (readline) {
+while (readline $inputstream) {
 	s/^([0-9a-f]{4,40})\n//m and
 	my $hash = $1;
 
@@ -40,12 +47,12 @@ while (readline) {
 	# if invalid, assume it's latin1
 	       $_ = decode(cp1252 => $_) if $@;
 
-	my $prefix = 0;
 	my %attr;
 
 	BLOCK:
 	for (reverse split /\n\n/) {
 		my @headers;
+		my $prefix = 0;
 
 		LINE:
 		for (split /\n/) {
@@ -75,6 +82,10 @@ while (readline) {
 				}
 			}
 
+			if (defined $opt{grep}) {
+				$_ ~~ qr/$opt{grep}/i or next LINE;
+			}
+
 			given ($opt{simplify} // 'none') {
 				when (['email', 'authors']) {
 					$header[1] =~ s{
@@ -85,7 +96,7 @@ while (readline) {
 					}{<...>}imsx;
 				}
 				when (['var', 'vars', '']) {
-					when ($header[0] =~ /[ _-] (?: by | to ) $/imsx) {
+					when ($header[0] =~ /[ _-] (?: by | to ) $ | ^cc$/imsx) {
 						$header[1] = undef;
 					}
 					for ($header[1]) {
@@ -125,7 +136,7 @@ while (readline) {
 			my $line = $_->[2] // join(': ', @$_);
 			$line =~ s/^/$hash / if defined $hash;
 
-			if (defined $opt{min} or $opt{max}) {
+			if (defined $opt{min} or $opt{max} or $opt{count}) {
 				my $counter = \$headercount{ $_->[0] }->{ $_->[1] // '' };
 				my $excess = $$counter++ - ($opt{min} // 0);
 				next if $excess >= ($opt{max} || 1);
@@ -154,7 +165,9 @@ git-grep-footer - Find custom header lines in commit messages
 
 =head1 SYNOPSIS
 
-F<git> log --pretty=%b%x00 | F<git-grep-footer> [OPTIONS]
+F<git-grep-footer> [OPTIONS] [-- <git log options>]
+
+F<git> log -z --pretty=format:%b | F<git-grep-footer> [OPTIONS] -
 
 =head1 DESCRIPTION
 
@@ -163,6 +176,7 @@ a common convention to list custom metadata such as
 C<Signed-off-by> and C<Acked-by>.
 
 Sections are identified by at least one leading keyword containing a dash
+(or exceptionally recognised)
 followed by a colon.
 
 =head1 OPTIONS
@@ -199,6 +213,11 @@ Values will be hidden entirely, so only attribute names remain.
 
 =back
 
+=item --grep=<pattern>
+
+Only include lines matching the specified regular expression.
+Case insensitivity can be disabled by prepending C<(?-i)>.
+
 =item -u, --unique[=<threshold>]
 
 Each match is only shown once,
@@ -210,6 +229,38 @@ The original line is given for each match,
 but simplifications still apply for duplicate determination.
 Additional samples are optionally given upto the given maximum.
 
+=item -c, --count
+
+Prefixes (unique) lines by the number of occurrences.
+Causes output to be buffered until all input has been read (obviously).
+
+=back
+
+=head1 EXAMPLES
+
+=over
+
+=item git-grep-footer --grep=^ack v2.6.32..v2.6.33
+
+Search for I<Acked-by> lines for version I<v2.6.33>.
+Append C<-uin> to skip reoccurrences.
+
+=item git-grep-footer -u --grep=junio
+
+Show distinct lines mentioning a specific author.
+
+=item git-grep-footer -c --simplify --grep=^si
+
+Compare various capitalisations and (mis)spellings of signoffs.
+
+=item git-grep-footer -c --simplify=all -i | sort -n -r | head -n10
+
+List the ten most frequently used attribute names.
+
+=item git-grep-footer -n2 -i -s -- --reverse
+
+The earliest two usages of each distinct identifier.
+
 =back
 
 =head1 AUTHOR
@@ -218,5 +269,7 @@ Mischa POSLAWSKY <perl@shiar.org>
 
 =head1 LICENSE
 
-Copyright. All rights reserved.
+This software is free software;
+you can redistribute and/or modify it under the terms of the GNU GPL
+version 2 or later.