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path: root/debian/merge-snapshot
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#!/usr/bin/perl

use 5.028;
use strict;
use warnings;

use Cwd;
use Git::Wrapper;

my $git = Git::Wrapper->new(getcwd);

($git->rev_parse({ abbrev_ref => 1 }, "HEAD"))[0] eq "athena/unstable"
  or die "on wrong branch!";

my ($to_merge) = $git->merge_base("melete", "origin/master");

chomp(my $prev_version = `dpkg-parsechangelog -SVersion`);
chomp(my $prev_distn   = `dpkg-parsechangelog -SDistribution`);

my ($prev_date, $prev_rev) = ($prev_version =~ /git([0-9]+).([0-9]+)/);
my ($new_date) = $git->show("-s", { format => "%ci" }, $to_merge);
$new_date =~ /\A([0-9]{4})-([0-9]{2})-([0-9]{2})/
  or die "couldn't parse new commit committer date";
$new_date = $1 . $2 . $3;
my $new_rev = $prev_date eq $new_date ? $prev_rev + 1 : 1;

$git->merge({
        message =>
          "Merge remote-tracking branch 'origin/master' into athena/unstable"
    },
    $to_merge
);

system "dch", "-v29.1~git${new_date}.${new_rev}",
  $prev_distn eq "UNRELEASED" ? "" : "Package git snapshot.";
$git->add("debian/changelog");
$git->commit({ message => "changelog" });