|
| 1 | +#!/usr/bin/perl |
| 2 | + |
| 3 | +# List people who might be interested in a patch. Useful as the argument to |
| 4 | +# git-send-email --cc-cmd option, and in other situations. |
| 5 | +# |
| 6 | +# Usage: git contacts <file | rev-list option> ... |
| 7 | + |
| 8 | +use strict; |
| 9 | +use warnings; |
| 10 | +use IPC::Open2; |
| 11 | + |
| 12 | +my $since = '5-years-ago'; |
| 13 | +my $min_percent = 10; |
| 14 | +my $labels_rx = qr/Signed-off-by|Reviewed-by|Acked-by|Cc/i; |
| 15 | +my %seen; |
| 16 | + |
| 17 | +sub format_contact { |
| 18 | + my ($name, $email) = @_; |
| 19 | + return "$name <$email>"; |
| 20 | +} |
| 21 | + |
| 22 | +sub parse_commit { |
| 23 | + my ($commit, $data) = @_; |
| 24 | + my $contacts = $commit->{contacts}; |
| 25 | + my $inbody = 0; |
| 26 | + for (split(/^/m, $data)) { |
| 27 | + if (not $inbody) { |
| 28 | + if (/^author ([^<>]+) <(\S+)> .+$/) { |
| 29 | + $contacts->{format_contact($1, $2)} = 1; |
| 30 | + } elsif (/^$/) { |
| 31 | + $inbody = 1; |
| 32 | + } |
| 33 | + } elsif (/^$labels_rx:\s+([^<>]+)\s+<(\S+?)>$/o) { |
| 34 | + $contacts->{format_contact($1, $2)} = 1; |
| 35 | + } |
| 36 | + } |
| 37 | +} |
| 38 | + |
| 39 | +sub import_commits { |
| 40 | + my ($commits) = @_; |
| 41 | + return unless %$commits; |
| 42 | + my $pid = open2 my $reader, my $writer, qw(git cat-file --batch); |
| 43 | + for my $id (keys(%$commits)) { |
| 44 | + print $writer "$id\n"; |
| 45 | + my $line = <$reader>; |
| 46 | + if ($line =~ /^([0-9a-f]{40}) commit (\d+)/) { |
| 47 | + my ($cid, $len) = ($1, $2); |
| 48 | + die "expected $id but got $cid\n" unless $id eq $cid; |
| 49 | + my $data; |
| 50 | + # cat-file emits newline after data, so read len+1 |
| 51 | + read $reader, $data, $len + 1; |
| 52 | + parse_commit($commits->{$id}, $data); |
| 53 | + } |
| 54 | + } |
| 55 | + close $reader; |
| 56 | + close $writer; |
| 57 | + waitpid($pid, 0); |
| 58 | + die "git-cat-file error: $?\n" if $?; |
| 59 | +} |
| 60 | + |
| 61 | +sub get_blame { |
| 62 | + my ($commits, $source, $start, $len, $from) = @_; |
| 63 | + $len = 1 unless defined($len); |
| 64 | + return if $len == 0; |
| 65 | + open my $f, '-|', |
| 66 | + qw(git blame --porcelain -C), '-L', "$start,+$len", |
| 67 | + '--since', $since, "$from^", '--', $source or die; |
| 68 | + while (<$f>) { |
| 69 | + if (/^([0-9a-f]{40}) \d+ \d+ \d+$/) { |
| 70 | + my $id = $1; |
| 71 | + $commits->{$id} = { id => $id, contacts => {} } |
| 72 | + unless $seen{$id}; |
| 73 | + $seen{$id} = 1; |
| 74 | + } |
| 75 | + } |
| 76 | + close $f; |
| 77 | +} |
| 78 | + |
| 79 | +sub scan_patches { |
| 80 | + my ($commits, $id, $f) = @_; |
| 81 | + my $source; |
| 82 | + while (<$f>) { |
| 83 | + if (/^From ([0-9a-f]{40}) Mon Sep 17 00:00:00 2001$/) { |
| 84 | + $id = $1; |
| 85 | + $seen{$id} = 1; |
| 86 | + } |
| 87 | + next unless $id; |
| 88 | + if (m{^--- (?:a/(.+)|/dev/null)$}) { |
| 89 | + $source = $1; |
| 90 | + } elsif (/^--- /) { |
| 91 | + die "Cannot parse hunk source: $_\n"; |
| 92 | + } elsif (/^@@ -(\d+)(?:,(\d+))?/ && $source) { |
| 93 | + get_blame($commits, $source, $1, $2, $id); |
| 94 | + } |
| 95 | + } |
| 96 | +} |
| 97 | + |
| 98 | +sub scan_patch_file { |
| 99 | + my ($commits, $file) = @_; |
| 100 | + open my $f, '<', $file or die "read failure: $file: $!\n"; |
| 101 | + scan_patches($commits, undef, $f); |
| 102 | + close $f; |
| 103 | +} |
| 104 | + |
| 105 | +sub parse_rev_args { |
| 106 | + my @args = @_; |
| 107 | + open my $f, '-|', |
| 108 | + qw(git rev-parse --revs-only --default HEAD --symbolic), @args |
| 109 | + or die; |
| 110 | + my @revs; |
| 111 | + while (<$f>) { |
| 112 | + chomp; |
| 113 | + push @revs, $_; |
| 114 | + } |
| 115 | + close $f; |
| 116 | + return @revs if scalar(@revs) != 1; |
| 117 | + return "^$revs[0]", 'HEAD' unless $revs[0] =~ /^-/; |
| 118 | + return $revs[0], 'HEAD'; |
| 119 | +} |
| 120 | + |
| 121 | +sub scan_rev_args { |
| 122 | + my ($commits, $args) = @_; |
| 123 | + my @revs = parse_rev_args(@$args); |
| 124 | + open my $f, '-|', qw(git rev-list --reverse), @revs or die; |
| 125 | + while (<$f>) { |
| 126 | + chomp; |
| 127 | + my $id = $_; |
| 128 | + $seen{$id} = 1; |
| 129 | + open my $g, '-|', qw(git show -C --oneline), $id or die; |
| 130 | + scan_patches($commits, $id, $g); |
| 131 | + close $g; |
| 132 | + } |
| 133 | + close $f; |
| 134 | +} |
| 135 | + |
| 136 | +sub mailmap_contacts { |
| 137 | + my ($contacts) = @_; |
| 138 | + my %mapped; |
| 139 | + my $pid = open2 my $reader, my $writer, qw(git check-mailmap --stdin); |
| 140 | + for my $contact (keys(%$contacts)) { |
| 141 | + print $writer "$contact\n"; |
| 142 | + my $canonical = <$reader>; |
| 143 | + chomp $canonical; |
| 144 | + $mapped{$canonical} += $contacts->{$contact}; |
| 145 | + } |
| 146 | + close $reader; |
| 147 | + close $writer; |
| 148 | + waitpid($pid, 0); |
| 149 | + die "git-check-mailmap error: $?\n" if $?; |
| 150 | + return \%mapped; |
| 151 | +} |
| 152 | + |
| 153 | +if (!@ARGV) { |
| 154 | + die "No input revisions or patch files\n"; |
| 155 | +} |
| 156 | + |
| 157 | +my (@files, @rev_args); |
| 158 | +for (@ARGV) { |
| 159 | + if (-e) { |
| 160 | + push @files, $_; |
| 161 | + } else { |
| 162 | + push @rev_args, $_; |
| 163 | + } |
| 164 | +} |
| 165 | + |
| 166 | +my %commits; |
| 167 | +for (@files) { |
| 168 | + scan_patch_file(\%commits, $_); |
| 169 | +} |
| 170 | +if (@rev_args) { |
| 171 | + scan_rev_args(\%commits, \@rev_args) |
| 172 | +} |
| 173 | +import_commits(\%commits); |
| 174 | + |
| 175 | +my $contacts = {}; |
| 176 | +for my $commit (values %commits) { |
| 177 | + for my $contact (keys %{$commit->{contacts}}) { |
| 178 | + $contacts->{$contact}++; |
| 179 | + } |
| 180 | +} |
| 181 | +$contacts = mailmap_contacts($contacts); |
| 182 | + |
| 183 | +my $ncommits = scalar(keys %commits); |
| 184 | +for my $contact (keys %$contacts) { |
| 185 | + my $percent = $contacts->{$contact} * 100 / $ncommits; |
| 186 | + next if $percent < $min_percent; |
| 187 | + print "$contact\n"; |
| 188 | +} |
0 commit comments