X-Git-Url: http://git.shiar.net/git-grep-footer.git/blobdiff_plain/4f6e72fcfbd46e21ebf1aa595f7738730e42ad37..HEAD:/git-grep-footer

diff --git a/git-grep-footer b/git-grep-footer
index b676ab8..97fbca7 100755
--- a/git-grep-footer
+++ b/git-grep-footer
@@ -1,4 +1,4 @@
-#!/usr/bin/perl
+#!/usr/bin/env perl
 use 5.010;
 use strict;
 use warnings;
@@ -7,40 +7,48 @@ use Encode 'decode';
 use Data::Dump 'pp';
 use Getopt::Long qw(:config bundling);
 
+our $VERSION = '1.00';
+
 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',
+	'hash|H!',
 	'version|V'  => sub { Getopt::Long::VersionMessage() },
 	'usage|h'    => sub { Getopt::Long::HelpMessage() },
 	'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:%h%n%b', @ARGV);
+} || die "Automatic git log failed: $@";
+
 local $| = 1;
 local $/ = "\0";
 
-my $HEADERMATCH = qr/ [a-z]+ (?: (?:-\w+)+ | \ by ) | cc | reference /ix;
+my $HEADERMATCH = qr/ [a-z]+ (?: (?:-\w+)+ | \ by ) | cc | reference /imsx;
 
 my (%headercount, @headercache);
 
-while (readline) {
-	s/^([0-9a-f]{4,40})\n//m and
-	my $hash = $1;
+while (readline $inputstream) {
+	s/^ ([0-9a-f]{4,40}) \n//msx;
+	my $hash = $opt{hash} ? $1 : undef;
 
 	# strip commit seperator
 	chomp;
 	# skip expensive checks without potential identifier
 	m/:/ or next;
 	# try to parse as UTF-8
-	eval { $_ = decode(utf8   => $_, Encode::FB_CROAK()) };
+	eval { $_ = decode(utf8   => $_, Encode::FB_CROAK()); return 1 }
 	# if invalid, assume it's latin1
-	       $_ = decode(cp1252 => $_) if $@;
-
-	my %attr;
+	    or $_ = decode(cp1252 => $_);
 
 	BLOCK:
 	for (reverse split /\n\n/) {
@@ -49,14 +57,14 @@ while (readline) {
 
 		LINE:
 		for (split /\n/) {
-			next if not /\S/;
+			next if not m/\S/;
 			my @header = m{
 				^
 				(?<key> $HEADERMATCH)
 				: \s*
-				(?<val> \S .+)
+				(?<val> \S [^\n]+)
 				$
-			}imx or do {
+			}imsx or do {
 				$prefix++;
 				next LINE;
 			};
@@ -67,14 +75,18 @@ while (readline) {
 				for ($header[0]) {
 					tr/ _/-/;
 
-					state $BY = qr{ (?: -? b[yu] )? \Z }ix;
-					s{^ si (?:ge?n|n?g) (?:e?[dt])? -? (?:of+)? $BY}{Signed-off-by}ix;
-					s{^ ack (?:ed|de)?  $BY}{Acked-by}ix;
-					s{^ review (?:e?d)? $BY}{Reviewed-by}ix;
-					s{^ teste[dt]       $BY}{Tested-by}ix;
+					state $BY = qr{ (?: -? b[yu] )? \Z }imsx;
+					s{\A si (?:ge?n|n?g) (?:e?[dt])? -? (?:of+)? $BY}{Signed-off-by}imsx;
+					s{\A ack (?:ed|de)?  $BY}{Acked-by}imsx;
+					s{\A review (?:e?d)? $BY}{Reviewed-by}imsx;
+					s{\A teste[dt]       $BY}{Tested-by}imsx;
 				}
 			}
 
+			if (defined $opt{grep}) {
+				$_ ~~ qr/$opt{grep}/im or next LINE;
+			}
+
 			given ($opt{simplify} // 'none') {
 				when (['email', 'authors']) {
 					$header[1] =~ s{
@@ -85,7 +97,7 @@ while (readline) {
 					}{<...>}imsx;
 				}
 				when (['var', 'vars', '']) {
-					when ($header[0] =~ /[ _-] (?: by | to ) $ | ^cc$/imsx) {
+					when ($header[0] =~ m/[ _-] (?: by | to ) $ | ^cc$/imsx) {
 						$header[1] = undef;
 					}
 					for ($header[1]) {
@@ -123,11 +135,11 @@ while (readline) {
 
 		for (@headers) {
 			my $line = $_->[2] // join(': ', @$_);
-			$line =~ s/^/$hash / if defined $hash;
+			$line =~ s/\A/$hash /msx if defined $hash;
 
 			if (defined $opt{min} or $opt{max} or $opt{count}) {
 				my $counter = \$headercount{ $_->[0] }->{ $_->[1] // '' };
-				my $excess = $$counter++ - ($opt{min} // 0);
+				my $excess = ${$counter}++ - ($opt{min} // 0);
 				next if $excess >= ($opt{max} || 1);
 				next if $excess <  0;
 				if ($opt{count}) {
@@ -154,7 +166,9 @@ 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
 
@@ -200,6 +214,11 @@ 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,
@@ -216,6 +235,37 @@ Additional samples are optionally given upto the given maximum.
 Prefixes (unique) lines by the number of occurrences.
 Causes output to be buffered until all input has been read (obviously).
 
+=item -H, --hash
+
+Prefixes the SHA1 hash of the (or a) matching commit.
+
+=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 --hash -- --reverse
+
+The earliest two usages of each distinct identifier.
+
 =back
 
 =head1 AUTHOR
@@ -224,5 +274,7 @@ 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.