From 859f2414c9f4b8533dcd3e6c1661f10031081630 Mon Sep 17 00:00:00 2001
From: Mischa POSLAWSKY <perl@shiar.org>
Date: Thu, 3 Feb 2011 22:40:27 +0100
Subject: [PATCH] options to hide duplicates (simplify, ignore-case, unique)

---
 git-grep-footer | 41 +++++++++++++++++++++++++++++++++++++++++
 1 file changed, 41 insertions(+)

diff --git a/git-grep-footer b/git-grep-footer
index 6952508..dcb24d4 100755
--- a/git-grep-footer
+++ b/git-grep-footer
@@ -8,6 +8,9 @@ use Getopt::Long;
 
 GetOptions(\my %opt,
 	'debug!',
+	'simplify|s:s',
+	'unique|u!',
+	'ignore-case|i!',
 ) or die;
 
 local $| = 1;
@@ -48,6 +51,40 @@ while (readline) {
 				next LINE;
 			};
 
+			given ($opt{simplify} // 'no') {
+				when ('strict') {
+					$header[1] =~ s{
+						\A
+						(?: [^:]+ )?
+						< [^@>]+ (?: @ | \h?\W? at \W?\h? ) [a-z0-9.-]+ >
+						\Z
+					}{<...>}imsx;
+				}
+				when (['text', '']) {
+					when ($header[0] =~ /[ _-] (?: by | to ) $/imsx) {
+						pop @header;
+					}
+					for ($header[1]) {
+						s{\b (https?)://\S+ }{[$1]}gmsx;  # url
+						s{(?: < | \A ) [^@>\s]+ @ [^>]+ (?: > | \Z )}{<...>}igmsx;  # address
+						s{\b [0-9]+ \b}{[num]}gmsx;  # number
+						s{\b I? [0-9a-f]{40} \b}{[sha1]}gmsx;  # hash
+					}
+				}
+				when (['all', 'any']) {
+					pop @header;
+				}
+				when ('no') {
+				}
+				default {
+					die "Unknown simplify option: '$_'\n";
+				}
+			}
+
+			if ($opt{'ignore-case'}) {
+				$_ = lc for @header;
+			}
+
 			push @headers, \@header;
 		}
 
@@ -58,6 +95,10 @@ while (readline) {
 		}
 
 		for (@headers) {
+			if ($opt{unique}) {
+				state $seen;
+				next if $seen->{ $_->[0] }->{ $_->[1] // '' }++;
+			}
 			say join ': ', @$_;
 		}
 
-- 
2.30.0