diff options
Diffstat (limited to 'contrib/contacts/git-contacts')
| -rwxr-xr-x | contrib/contacts/git-contacts | 203 |
1 files changed, 203 insertions, 0 deletions
diff --git a/contrib/contacts/git-contacts b/contrib/contacts/git-contacts new file mode 100755 index 000000000000..85ad732fc063 --- /dev/null +++ b/contrib/contacts/git-contacts @@ -0,0 +1,203 @@ +#!/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 $labels_rx = qr/Signed-off-by|Reviewed-by|Acked-by|Cc|Reported-by/i; +my %seen; + +sub format_contact { + my ($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, $from, $ranges) = @_; + return unless @$ranges; + open my $f, '-|', + qw(git blame --porcelain -C), + map({"-L$_->[0],+$_->[1]"} @$ranges), + '--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 $f; +} + +sub blame_sources { + my ($sources, $commits) = @_; + for my $s (keys %$sources) { + for my $id (keys %{$sources->{$s}}) { + get_blame($commits, $s, $id, $sources->{$s}{$id}); + } + } +} + +sub scan_patches { + my ($sources, $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 (/^@@ -(\d+)(?:,(\d+))?/ && $source) { + my $len = defined($2) ? $2 : 1; + push @{$sources->{$source}{$id}}, [$1, $len] if $len; + } + } +} + +sub scan_patch_file { + my ($commits, $file) = @_; + open my $f, '<', $file or die "read failure: $file: $!\n"; + scan_patches($commits, undef, $f); + close $f; +} + +sub parse_rev_args { + my @args = @_; + open my $f, '-|', + qw(git rev-parse --revs-only --default HEAD --symbolic), @args + or die; + my @revs; + while (<$f>) { + chomp; + push @revs, $_; + } + close $f; + return @revs if scalar(@revs) != 1; + return "^$revs[0]", 'HEAD' unless $revs[0] =~ /^-/; + return $revs[0], 'HEAD'; +} + +sub scan_rev_args { + my ($commits, $args) = @_; + my @revs = parse_rev_args(@$args); + open my $f, '-|', qw(git rev-list --reverse), @revs or die; + while (<$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 $f; +} + +sub mailmap_contacts { + my ($contacts) = @_; + my %mapped; + my $pid = open2 my $reader, my $writer, qw(git check-mailmap --stdin); + for my $contact (keys(%$contacts)) { + print $writer "$contact\n"; + my $canonical = <$reader>; + chomp $canonical; + $mapped{$canonical} += $contacts->{$contact}; + } + close $reader; + close $writer; + waitpid($pid, 0); + die "git-check-mailmap error: $?\n" if $?; + return \%mapped; +} + +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 %sources; +for (@files) { + scan_patch_file(\%sources, $_); +} +if (@rev_args) { + scan_rev_args(\%sources, \@rev_args) +} + +my $toplevel = `git rev-parse --show-toplevel`; +chomp $toplevel; +chdir($toplevel) or die "chdir failure: $toplevel: $!\n"; + +my %commits; +blame_sources(\%sources, \%commits); +import_commits(\%commits); + +my $contacts = {}; +for my $commit (values %commits) { + for my $contact (keys %{$commit->{contacts}}) { + $contacts->{$contact}++; + } +} +$contacts = mailmap_contacts($contacts); + +my $ncommits = scalar(keys %commits); +for my $contact (keys %$contacts) { + my $percent = $contacts->{$contact} * 100 / $ncommits; + next if $percent < $min_percent; + print "$contact\n"; +} |