contrib/findMergedChanges.pl

   1 #!/usr/bin/perl
   2
   3 use warnings;
   4 use strict;
   5
   6 sub nChanges {
   7     my ($branches, $fname) = @_;
   8     local *F;
   9     # requires perl 5.8.  Avoids shell issues if we ever get a changes
  10     # file named by the parents of Little Johnny Tables.
  11     open F, "-|", "git", "log", "--pretty=format:%H", $branches, "--", $fname
  12         or die "$!";
  13     my @changes = <F>;
  14     return scalar @changes
  15 }
  16
  17 my $look_for_type = "merged";
  18
  19 if (! @ARGV) {
  20     print <<EOF
  21 Usage:
  22    findMergedChanges.pl [--merged/--unmerged/--weird/--list] [--branch=<branchname] changes/*
  23
  24 A change is "merged" if it has ever been merged to release-0.2.4 and it has had
  25 no subsequent changes in master.
  26
  27 A change is "unmerged" if it has never been merged to release-0.2.4 and it
  28 has had changes in master.
  29
  30 A change is "weird" if it has been merged to release-0.2.4 and it *has* had
  31 subsequent changes in master.
  32
  33 Suggested application:
  34    findMergedChanges.pl --merged changes/* | xargs -n 1 git rm
  35
  36 EOF
  37 }
  38
  39 my $target_branch = "origin/release-0.2.4";
  40
  41 while (@ARGV and $ARGV[0] =~ /^--/) {
  42     my $flag = shift @ARGV;
  43     if ($flag =~ /^--(weird|merged|unmerged|list)/) {
  44         $look_for_type = $1;
  45     } elsif ($flag =~ /^--branch=(\S+)/) {
  46         $target_branch = $1;
  47     } else {
  48         die "Unrecognized flag $flag";
  49     }
  50 }
  51
  52 for my $changefile (@ARGV) {
  53     my $n_merged = nChanges($target_branch, $changefile);
  54     my $n_postmerged = nChanges("${target_branch}..origin/master", $changefile);
  55     my $type;
  56
  57     if ($n_merged != 0 and $n_postmerged == 0) {
  58         $type = "merged";
  59     } elsif ($n_merged == 0 and $n_postmerged != 0) {
  60         $type = "unmerged";
  61     } else {
  62         $type = "weird";
  63     }
  64
  65     if ($type eq $look_for_type) {
  66         print "$changefile\n";
  67     } elsif ($look_for_type eq 'list') {
  68         printf "% 8s: %s\n", $type, $changefile;
  69     }
  70 }