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