X-Git-Url: http://git.shiar.nl/git-grep-footer.git/blobdiff_plain/8fe9f6baac5b1fde96dfb345f1b3676cd3894c0b..fd7e377bdab3b1d3d586099aba9f8dc28d0d4040:/git-grep-footer

diff --git a/git-grep-footer b/git-grep-footer
index 2e42b4a..6f20fac 100755
--- a/git-grep-footer
+++ b/git-grep-footer
@@ -13,6 +13,7 @@ GetOptions(\my %opt,
 	'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() },
@@ -75,6 +76,10 @@ while (readline) {
 				}
 			}
 
+			if (defined $opt{grep}) {
+				$_ ~~ qr/$opt{grep}/i or next LINE;
+			}
+
 			given ($opt{simplify} // 'none') {
 				when (['email', 'authors']) {
 					$header[1] =~ s{
@@ -125,7 +130,7 @@ 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);
@@ -200,6 +205,11 @@ 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,
@@ -211,6 +221,38 @@ 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
+
+Search for Acked-by lines.
+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
+
+Upto two examples for each distinct identifier.
+
 =back
 
 =head1 AUTHOR