Revision control
++ #! /usr/bin/perl
++
++ # Copyright (C) 2017 The Qt Company Ltd.
++ # Contact: http://www.qt.io/licensing/
++ #
++ # You may use this file under the terms of the 3-clause BSD license.
++ # See the file LICENSE from this package for details.
++ #
++
++ use strict;
++ use warnings;
++ use JSON;
++
++ # Usage: $0 <project> <SHA1> [instance]
++ # - default instance is 'sanitybot'
++ # - configure git: git config --global <instance>.<option> <value>
++ # Valid options are:
++ # watches (optional)
++ # Space-separated list of path watches. Each watch requires an own
++ # section named watches.<name> with the following keys (note that
++ # these sections are NOT namespaced with the instance):
++ # projects (default ".*")
++ # Regular expression specifying the projects to watch.
++ # files
++ # Regular expression specifying the filepaths to watch.
++ # message (optional)
++ # The message to post when this watch triggers.
++ # invite (optional)
++ # Space-separated list of reviewers to add when this watch triggers.
++
++ die "usage: $0 <project> <SHA1> [instance]\n" if ($#ARGV < 1);
++ my $project = shift @ARGV;
++ my $rev = shift @ARGV;
++
++ my $instance = 'sanitybot';
++ $instance = $ARGV[0] if ($#ARGV > -1);
++
++ # Doing this is less expensive than calling git repeatedly.
++ my %config = ();
++ for (`git config -l`) {
++ /^([^=]+)=(.*$)/;
++ $config{$1} = $2;
++ }
++
++ sub getcfg($;$)
++ {
++ my ($key, $def) = @_;
++ my $fkey = $instance.'.'.$key;
++ if (defined $config{$fkey}) {
++ return $config{$fkey};
++ } elsif (@_ > 1) {
++ return $def;
++ } else {
++ die $fkey." not set.\n";
++ }
++ }
++
++ my @messages = ();
++ my %verdict = ();
++ my @invite = ();
++
++ my (@watches, %watch_files, %watch_messages, %watch_invites);
++ for my $w (split(/\s+/, getcfg('watches', ""))) {
++ my $p = $config{'watches.'.$w.'.projects'};
++ next if (defined($p) && $project !~ qr/^$p$/);
++ my $f = $config{'watches.'.$w.'.files'};
++ die "watches.$w.files not set.\n" if (!defined($f));
++ $watch_files{$w} = qr/^$f$/m;
++ $watch_messages{$w} = $config{'watches.'.$w.'.message'};
++ my $i = $config{'watches.'.$w.'.invite'};
++ $watch_invites{$w} = defined($i) ? [ split(/\s+/, $i) ] : [];
++ push @watches, $w;
++ }
++
++ my ($subject, $files);
++ {
++ local $/;
++ my $output = `git show --pretty=\%s\%x00 --name-only --ignore-submodules -C $rev`;
++ ($subject, $files) = split(/\x00/, $output);
++ }
++
++ for my $w (@watches) {
++ if ($files =~ /$watch_files{$w}/) {
++ push @messages, $watch_messages{$w} if (defined($watch_messages{$w}));
++ push @invite, @{$watch_invites{$w}};
++ last;
++ }
++ }
++
++ my $cr = 0;
++ if ($subject =~ /^[<[]?[Ww]ip\b|\bWIP\b|\*{3}|^(.)\1*$/) {
++ unshift @messages, "Apparently pushing a Work In Progress";
++ $cr = -2;
++ } elsif ($subject =~ /^(?:squash|fixup)! /) {
++ unshift @messages, "Commit was meant to be squashed";
++ $cr = -2;
++ }
++ $verdict{labels}{'Code-Review'} = $cr;
++
++ $verdict{message} = join("\n\n", @messages) if (@messages);
++ $verdict{invite} = \@invite if (@invite);
++
++ print encode_json(\%verdict)."\n";