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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
14if git-rev-parse --verify HEAD 2>/dev/null
15then
16git-diff-index -p -M --cached HEAD --
17else
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:
21fi |
22perl -e '
23 my $found_bad = 0;
24 my $filename;
25 my $reported_filename = "";
26 my $lineno;
27 sub bad_line {
28my ($why, $line) = @_;
29if (!$found_bad) {
30 print STDERR "*\n";
31 print STDERR "* You have some suspicious patch lines:\n";
32 print STDERR "*\n";
33 $found_bad = 1;
34}
35if ($reported_filename ne $filename) {
36 print STDERR "* In $filename\n";
37 $reported_filename = $filename;
38}
39print STDERR "* $why (line $lineno)\n";
40print STDERR "$filename:$lineno:$line\n";
41 }
42 while (<>) {
43if (m|^diff --git a/(.*) b/\1$|) {
44 $filename = $1;
45 next;
46}
47if (/^@@ -\S+ \+(\d+)/) {
48 $lineno = $1 - 1;
49 next;
50}
51if (/^ /) {
52 $lineno++;
53 next;
54}
55if (s/^\+//) {
56 $lineno++;
57 chomp;
58 if (/\s$/) {
59bad_line("trailing whitespace", $_);
60 }
61 if (/^\s* \t/) {
62bad_line("indent SP followed by a TAB", $_);
63 }
64 if (/^([<>])\1{6} |^={7}$/) {
65bad_line("unresolved merge conflict", $_);
66 }
67}
68 }
69 exit($found_bad);
70'

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