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git add -i: Fix parsing of abbreviated hunk headers

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The unified diff format allows one-line ranges to be abbreviated
by omiting the size.  The hunk header "@@ -10,1 +10,1 @@" can be
expressed as "@@ -10 +10 @@", but this wasn't properly parsed in
all cases.

Such abbreviated hunk headers are generated when a one-line change
(add, remove or modify) appears without context; for example
because the file is a one-liner itself or because GIT_DIFF_OPTS
was set to '-u0'.  If the user then runs 'git add -i' and enters
the 'patch' command for that file, perl complains about undefined
variables.

Signed-off-by: Jean-Luc Herren <jlh@gmx.ch>
Signed-off-by: Lars Hjemli <hjemli@gmail.com>
Signed-off-by: Shawn O. Pearce <spearce@spearce.org>
This commit is contained in:
Jean-Luc Herren 2007-10-09 21:29:26 +02:00 committed by Shawn O. Pearce
parent a72c874e43
commit 7288ed8ebd
1 changed files with 5 additions and 6 deletions
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11
git-add--interactive.perl
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@ -360,7 +360,9 @@ sub hunk_splittable {
sub parse_hunk_header {
my ($line) = @_;
my ($o_ofs, $o_cnt, $n_ofs, $n_cnt) =
$line =~ /^@@ -(\d+)(?:,(\d+)) \+(\d+)(?:,(\d+)) @@/;
$line =~ /^@@ -(\d+)(?:,(\d+))? \+(\d+)(?:,(\d+))? @@/;
$o_cnt = 1 unless defined $o_cnt;
$n_cnt = 1 unless defined $n_cnt;
return ($o_ofs, $o_cnt, $n_ofs, $n_cnt);
}
@ -705,9 +707,6 @@ sub patch_update_cmd {
parse_hunk_header($text->[0]);
if (!$_->{USE}) {
if (!defined $o_cnt) { $o_cnt = 1; }
if (!defined $n_cnt) { $n_cnt = 1; }
# We would have added ($n_cnt - $o_cnt) lines
# to the postimage if we were to use this hunk,
# but we didn't. So the line number that the next
@ -719,10 +718,10 @@ sub patch_update_cmd {
if ($n_lofs) {
$n_ofs += $n_lofs;
$text->[0] = ("@@ -$o_ofs" .
((defined $o_cnt)
(($o_cnt != 1)
? ",$o_cnt" : '') .
" +$n_ofs" .
((defined $n_cnt)
(($n_cnt != 1)
? ",$n_cnt" : '') .
" @@\n");
}