From c1b9cda14de87651822ead890e10389993737f4c Mon Sep 17 00:00:00 2001
From: Mischa POSLAWSKY <perl@shiar.org>
Date: Sat, 5 Feb 2011 07:13:43 +0100
Subject: [PATCH] option to show commit hashes

---
 git-grep-footer | 13 +++++++++----
 1 file changed, 9 insertions(+), 4 deletions(-)

diff --git a/git-grep-footer b/git-grep-footer
index a868319..f739228 100755
--- a/git-grep-footer
+++ b/git-grep-footer
@@ -17,6 +17,7 @@ GetOptions(\my %opt,
 	'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) },
@@ -24,7 +25,7 @@ GetOptions(\my %opt,
 
 my $inputstream = $opt{''} ? \*ARGV : eval {
 	require Git;
-	Git::command_output_pipe('log', '-z', '--pretty=format:%b', @ARGV);
+	Git::command_output_pipe('log', '-z', '--pretty=format:%h%n%b', @ARGV);
 } || die "Automatic git log failed: $@";
 
 local $| = 1;
@@ -35,8 +36,8 @@ my $HEADERMATCH = qr/ [a-z]+ (?: (?:-\w+)+ | \ by ) | cc | reference /ix;
 my (%headercount, @headercache);
 
 while (readline $inputstream) {
-	s/^([0-9a-f]{4,40})\n//m and
-	my $hash = $1;
+	s/^([0-9a-f]{4,40})\n//m;
+	my $hash = $opt{hash} ? $1 : undef;
 
 	# strip commit seperator
 	chomp;
@@ -234,6 +235,10 @@ 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
@@ -257,7 +262,7 @@ Compare various capitalisations and (mis)spellings of signoffs.
 
 List the ten most frequently used attribute names.
 
-=item git-grep-footer -n2 -i -s -- --reverse
+=item git-grep-footer -n2 -i -s --hash -- --reverse
 
 The earliest two usages of each distinct identifier.
 
-- 
2.30.0