upgrade

#!/usr/bin/perl

# eg upgrade.perl 6.0.0 5.11.0 4.4.3 0.12.13

# clean start
system("git", "checkout", "master");
system("git", "reset", "--hard");

my @types = ("", "base-");

foreach my $rootversion (@ARGV) {
  foreach my $buildtype (@types) {
    my $version="${buildtype}${rootversion}";

    print "\nUpdating to ${version}\n\n";

    system("git", "checkout", "-b", $version);

    system("sed", "-i", "", "s|alpine.node:6\.0\.0|alpine-node:${version}|", "Dockerfile");
    system("git", "commit", "-a", "-m", "Upgrade to ${version}");

    my @tags = get_tags($rootversion, $buildtype);

    print "\nTagging ${version} as @tags\n\n";

    foreach my $tag (@tags) {
      system("git", "tag", "-a", $tag, "-m", "Upgrade to ${version}", "-f");
    }

    system("git", "checkout", "master");
    system("git", "branch", "-d", "-f", $version);

    print "${version}\n";
  }
}

sub get_tags {
  local $rootversion = shift;
  local $buildtype = shift;

  local @existing_tags = `git tag | grep -v 'latest\|base'`;

  $rootversion =~ /^(\d+)\.(\d+)\.(\d+)/;
  local $major = $1;
  local $minor = $2;
  local $patch = $3;

  local $is_latest = 1;
  local $is_new_major = 1;
  local $is_new_minor = 1;

  local @new_tags = ("${buildtype}${rootversion}");

  foreach my $t (@existing_tags) {
    $t =~ /^(\d+)\.(\d+)\.(\d+)/;
    local $existing_major = $1;
    local $existing_minor = $2;
    local $existing_patch = $3;

    # test version here
    if ($major < $existing_major) {
      $is_latest = 0;
    }
    if ($major == $existing_major && $minor < $existing_minor) {
      $is_latest = 0;
      $is_new_major = 0;
    }
    if ($major == $existing_major && $minor == $existing_minor && $patch < $existing_patch) {
      $is_latest = 0;
      $is_new_major = 0;
      $is_new_minor = 0;
    }
  }

  if ($is_latest) {
    push @new_tags, "${buildtype}latest";
  }
  if ($is_new_major) {
    push @new_tags, "${buildtype}${major}";
  }
  if ($is_new_minor) {
    push @new_tags, "${buildtype}${major}.${minor}";
  }

  return @new_tags;
}