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*   /) {
  62                 bad_line("indent SP followed by a TAB", $_);
  63             }
  64             if (/^(?:[<>=]){7}/) {
  65                 bad_line("unresolved merge conflict", $_);
  66             }
  67         }
  68     }
  69     exit($found_bad);
  70 '