git-topic.perl

   1 #!/usr/bin/perl -w
   2 #
   3 # Copyright (c) 2006 Junio C Hamano
   4 #
   5
   6 use strict;
   7 use Getopt::Long;
   8
   9 my $topic_pattern = '??/*';
  10 my $base = 'next';
  11 my @stage = qw(next pu);
  12 my @mark = ('.', '?', '-', '+');
  13 my $all = 0;
  14
  15 my @custom_stage;
  16 my @custom_mark;
  17 GetOptions("topic=s" => \$topic_pattern,
  18            "base=s" => \$base,
  19            "stage=s" => \@custom_stage,
  20            "mark=s" => \@custom_mark,
  21            "all!" => \$all)
  22     or die;
  23
  24 if (@custom_stage) { @stage = @custom_stage; }
  25 if (@custom_mark) { @mark = @custom_mark; }
  26
  27 sub read_revs_short {
  28         my (@args) = @_;
  29         my @revs;
  30         open(REVS, '-|', qw(git rev-list --no-merges), @args)
  31             or die;
  32         while (<REVS>) {
  33                 chomp;
  34                 push @revs, $_;
  35         }
  36         close(REVS);
  37         return @revs;
  38 }
  39
  40 sub read_revs {
  41         my ($bottom, $top, $mask) = @_;
  42         my @revs;
  43         open(REVS, '-|', qw(git rev-list --pretty=oneline --no-merges),
  44              "$bottom..$top")
  45             or die;
  46         while (<REVS>) {
  47                 chomp;
  48                 my ($sha1, $topic) = /^([0-9a-f]{40}) (.*)$/;
  49                 push @revs, [$sha1, $topic, $mask];
  50         }
  51         close(REVS);
  52         return @revs;
  53 }
  54
  55 sub rebase_marker {
  56         my ($topic, $stage, $in_next) = @_;
  57         my @not_in_topic = read_revs_short('^master', "^$topic", "$stage");
  58
  59         # @$in_next is what is in $stage but not in $base.
  60         # @not_in_topic excludes what came from $topic from @$in_next.
  61         # $topic can be rebased if these two set matches, because
  62         # no commits in $topic has been merged to $stage yet.
  63         if (@not_in_topic != @$in_next) {
  64                 # we cannot rebase it anymore
  65                 return ' ';
  66         }
  67         if (read_revs_short('master', "^$topic")) {
  68                 # there is something that is in master but not in topic.
  69                 return '^';
  70         }
  71         # topic is up to date.
  72         return '*';
  73 }
  74
  75 sub describe_topic {
  76         my ($topic) = @_;
  77         open(CONF, '-|', qw(git repo-config --get),
  78                 "branch.$topic.description")
  79                 or die;
  80         my $it = join('',<CONF>);
  81         close(CONF);
  82         chomp($it);
  83         if ($it) {
  84                 wrap_print("  $it");
  85         }
  86 }
  87
  88 sub wrap_print {
  89         my ($string) = @_;
  90         format STDOUT =
  91 ~^<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<
  92         $string
  93  ~~^<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<
  94         $string
  95 .
  96         write;
  97 }
  98
  99 open(TOPIC, '-|', qw(git for-each-ref),
 100         '--sort=-authordate',
 101         '--format=%(objectname) %(authordate) %(refname)',
 102         "refs/heads/$topic_pattern")
 103         or die;
 104
 105 my @in_next = read_revs_short('^master', $stage[0]);
 106
 107 while (<TOPIC>) {
 108         chomp;
 109         my ($sha1, $date, $topic) = m|^([0-9a-f]{40})\s(.*?)\srefs/heads/(.+)$|
 110                 or next;
 111         my @revs = read_revs($base, $sha1, (1<<@stage)-1);
 112         next unless (@revs || $all);
 113
 114         my %revs = map { $_->[0] => $_ } @revs; # fast index
 115         for (my $i = 0; $i < @stage; $i++) {
 116                 for my $item (read_revs_short("^$stage[$i]", $sha1)) {
 117                         if (exists $revs{$item}) {
 118                                 $revs{$item}[2] &= ~(1 << $i);
 119                         }
 120                 }
 121         }
 122
 123         print '*' . rebase_marker($sha1, $stage[0], \@in_next);
 124         my $count = "";
 125         if (1 < @revs) {
 126                 $count = " " . (scalar @revs) . " commits";
 127         }
 128         elsif (@revs) {
 129                 $count = " 1 commit";
 130         }
 131         print " $topic ($date)$count\n";
 132         describe_topic($topic);
 133         for my $item (@revs) {
 134                 my $mark = $item->[2];
 135                 if ($mark < @mark) {
 136                         $mark = $mark[$mark];
 137                 }
 138                 wrap_print("$mark $item->[1]");
 139         }
 140 }