Add 'g' command to go to a hunk

When a minor change is made while the working directory is in a bit of a
mess, it is somewhat difficult to wade through all of the hunks using git
add --patch.  This allows one to jump to the hunk that needs to be staged
without having to respond 'n' to each preceding hunk.

Signed-off-by: William Pursell <bill.pursell@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

diff --git a/git-add--interactive.perl b/git-add--interactive.perl
index eb11132b23f2da01c71035fe3f5f321b9f09c908..ca60356d0082123cd1e9572572528d8265be43a3 100755 (executable)
--- a/git-add--interactive.perl
+++ b/git-add--interactive.perl
@@ -800,6 +800,7 @@ y - stage this hunk
 n - do not stage this hunk
 a - stage this and all the remaining hunks in the file
 d - do not stage this hunk nor any of the remaining hunks in the file
+g - select a hunk to go to
 j - leave this hunk undecided, see next undecided hunk
 J - leave this hunk undecided, see next hunk
 k - leave this hunk undecided, see previous undecided hunk
@@ -945,6 +946,9 @@ sub patch_update_file {
                if ($ix < $num - 1) {
                        $other .= '/J';
                }
+               if ($num > 1) {
+                       $other .= '/g';
+               }
                for ($i = 0; $i < $num; $i++) {
                        if (!defined $hunk[$i]{USE}) {
                                $undecided = 1;
@@ -978,6 +982,28 @@ sub patch_update_file {
                                }
                                next;
                        }
+                       elsif ($other =~ /g/ && $line =~ /^g(.*)/) {
+                               my $response = $1;
+                               my $no = $ix > 10 ? $ix - 10 : 0;
+                               while ($response eq '') {
+                                       my $extra = "";
+                                       $no = display_hunks(\@hunk, $no);
+                                       if ($no < $num) {
+                                               $extra = " (<ret> to see more)";
+                                       }
+                                       print "go to which hunk$extra? ";
+                                       $response = <STDIN>;
+                                       chomp $response;
+                               }
+                               if ($response !~ /^\s*\d+\s*$/) {
+                                       print STDERR "Invalid number: '$response'\n";
+                               } elsif (0 < $response && $response <= $num) {
+                                       $ix = $response - 1;
+                               } else {
+                                       print STDERR "Sorry, only $num hunks available.\n";
+                               }
+                               next;
+                       }
                        elsif ($line =~ /^d/i) {
                                while ($ix < $num) {
                                        if (!defined $hunk[$ix]{USE}) {