pre-rebase hook update
[git/git.git] / templates / hooks--pre-commit
1 #!/bin/sh
2 #
3 # An example hook script to verify what is about to be committed.
4 # Called by git-commit with no arguments. The hook should
5 # exit with non-zero status after issuing an appropriate message if
6 # it wants to stop the commit.
7 #
8 # To enable this hook, make this file executable.
9
10 # This is slightly modified from Andrew Morton's Perfect Patch.
11 # Lines you introduce should not have trailing whitespace.
12 # Also check for an indentation that has SP before a TAB.
13
14 if git-rev-parse --verify HEAD 2>/dev/null
15 then
16 git-diff-index -p -M --cached HEAD --
17 else
18 # NEEDSWORK: we should produce a diff with an empty tree here
19 # if we want to do the same verification for the initial import.
20 :
21 fi |
22 perl -e '
23 my $found_bad = 0;
24 my $filename;
25 my $reported_filename = "";
26 my $lineno;
27 sub bad_line {
28 my ($why, $line) = @_;
29 if (!$found_bad) {
30 print STDERR "*\n";
31 print STDERR "* You have some suspicious patch lines:\n";
32 print STDERR "*\n";
33 $found_bad = 1;
34 }
35 if ($reported_filename ne $filename) {
36 print STDERR "* In $filename\n";
37 $reported_filename = $filename;
38 }
39 print STDERR "* $why (line $lineno)\n";
40 print STDERR "$filename:$lineno:$line\n";
41 }
42 while (<>) {
43 if (m|^diff --git a/(.*) b/\1$|) {
44 $filename = $1;
45 next;
46 }
47 if (/^@@ -\S+ \+(\d+)/) {
48 $lineno = $1 - 1;
49 next;
50 }
51 if (/^ /) {
52 $lineno++;
53 next;
54 }
55 if (s/^\+//) {
56 $lineno++;
57 chomp;
58 if (/\s$/) {
59 bad_line("trailing whitespace", $_);
60 }
61 if (/^\s* \t/) {
62 bad_line("indent SP followed by a TAB", $_);
63 }
64 if (/^([<>])\1{6} |^={7}$/) {
65 bad_line("unresolved merge conflict", $_);
66 }
67 }
68 }
69 exit($found_bad);
70 '