#!/usr/bin/perl
    eval 'exec /usr/bin/perl -S $0 ${1+"$@"}'
        if $running_under_some_shell;
#!/usr/bin/perl

use strict;
use File::Copy;
use File::Temp qw/ tempfile tempdir /;

# get libreoffice-build version from the given libreoffice-build sources
sub get_config_version($)
{
    my ($lo_core_dir) = @_;
    my $version;

    open (CONFIGURE, "$lo_core_dir/configure.in") ||
        die "can't open \"$lo_core_dir/configure.in\" for reading: $!\n";

    while (my $line = <CONFIGURE>) {
        chomp $line;

        if ($line =~ /AC_INIT\s*\(\s*libreoffice-build\s*,\s*([\w\.]*)\)/) {
            $version="$1";
        }
    }
    close (CONFIGURE);
    return $version;
}

# increment the version for a test build:
#        + add 'a' if the version ended with a number
#       + bump the letter otherwise
sub inc_test_version($)
{
    my ($version) = @_;

    my $lastchar = chop $version;
    my $new_version;

    if ($lastchar =~ /\d/) {
        return "$version" . "$lastchar" . "a";
    } elsif ($lastchar =~ /\w/) {
        # select next letter alhabeticaly: a->b, b->c, ...
        $lastchar =~ tr/0a-zA-Z/a-zA-Z0/;
        return "$version" . "$lastchar";
    } else {
        die "Can't generate test version from \"$version$lastchar\n";
    }
}

sub get_release_version($$$$)
{
    my ($config_version, $state_config_version, $state_release_version, $inc_version) = @_;
    my $release_version;

    if (defined $state_config_version &&
        defined $state_release_version &&
        "$state_config_version" eq "$config_version") {
        $release_version = "$state_release_version";
    } else {
        $release_version = "$config_version";
    }

    if ( defined $inc_version ) {
        $release_version = inc_test_version($release_version);
    }

    return $release_version;
}

# copy files to temp dir; showing a progress; using a black list
sub copy_dir_filter_and_show_progress($$)
{
    my ($source_dir, $target_dir) = @_;

    print "Copying \"$source_dir\" -> \"$target_dir\"...";
    # copy sources from git and show progress
    system ("cd $source_dir && " .
            "git archive --format=tar HEAD | " .
            "  tar -xf - -C $target_dir --checkpoint=500 --checkpoint-action=exec=\"echo -n .\"") &&
        die "Error: copying failed: $!\n";
    print "\n";
}

# copy the piece lo source directory into a tmp directory
# omit the .git subdirectories
sub copy_lo_piece_to_tempdir($$$)
{
    my ($piece_dir, $piece, $piece_tarball_name) = @_;
    my $tempdir = tempdir( 'libreoffice-XXXXXX', DIR => File::Spec->tmpdir );

    mkdir "$tempdir/$piece_tarball_name" || die "Can't create directory \"$tempdir/$piece_tarball_name\": $!\n";
    copy_dir_filter_and_show_progress("$piece_dir", "$tempdir/$piece_tarball_name");

    return $tempdir;
}

sub generate_lo_piece_changelog($$$)
{
    my ($lo_piece_clone, $lo_piece_release_dir, $piece) = @_;
    print "Generating changelog for $piece...\n";
#    print "1:$lo_piece_clone, 2:$lo_piece_release_dir, 3:$piece\n";
    system ("cd $lo_piece_clone && " .
            "git log --date=short --pretty='format:@%cd  %an  <%ae>  [%H]%n%n%s%n%n%e%b' | " .
            "  sed -e 's|^\([^@]\)|\t\1|' -e 's|^@||' >$lo_piece_release_dir/ChangeLog" ) &&
        die "Error: generating failed: $!\n";
}

sub run_autoreconf($$)
{
    my ($dir, $piece) = @_;

    print "Running autoreconf for $piece...\n";
    system ("cd $dir && " .
            "autoreconf -f -i && " .
            "rm -rf autom4te.cache && " .
            "cd - >/dev/null 2>&1") && die "Error: autoreconf failed: $!\n";
}

sub generate_sources_version_file($$)
{
    my ($dir, $release_version) = @_;

    open (VERFILE, ">$dir/sources.ver") || die "Can't open $dir/sources.ver: $!\n";

    print VERFILE "lo_sources_ver=$release_version\n";

    close VERFILE;
}

sub generate_tarball($$$)
{
    my ($dir, $tarball, $tar_compress_option) = @_;

    print "Creating $tarball...";
    # generate the tarball in the current directory; avoid "./" prefix in the stored paths; show progress
    system ("tar -c $tar_compress_option -f $tarball -C $dir --checkpoint=500 --checkpoint-action=exec=\"echo -n .\" --transform=\"s|^\./||\" .") && 
        die "Error: releasing failed: $!\n";
    print "\n";
}

sub generate_md5($)
{
    my ($filename) = @_;

    print "Generating MD5...\n";
    system ("md5sum $filename >$filename.md5") &&
        die "Error: releasing failed: $!\n";
}

sub default_releases_state_file($)
{
    my ($lo_core_dir) = @_;

    my $rootdir = $lo_core_dir;
    $rootdir =~ s/^(.*?)\/?[^\/]+\/?$/$1/;

    my $releases_state_file;
    if ($rootdir) {
        $releases_state_file = "$rootdir/.releases";
    } else {
        $releases_state_file = ".releases";
    }

    return "$releases_state_file";
}

sub load_releases_state($)
{
    my ($releases_state_file) = @_;

    my $state_config_version;
    my $state_release_version;

    if (open (STATE, "$releases_state_file")) {

        while (my $line = <STATE>) {
            chomp $line;

            if ($line =~ /^\s*configure_version\s*=\s*(.*)$/) {
                $state_config_version = "$1";
            } elsif ($line =~ /^\s*released_version\s*=\s*(.*)$/) {
                $state_release_version = "$1";
            }
        }
            close (STATE);
    }

    return $state_config_version, $state_release_version;
}

sub save_releases_state($$$)
{
    my ($releases_state_file, $config_version, $release_version) = @_;

    open (STATE, '>', "$releases_state_file") ||
        die "Can't open \"$releases_state_file\" for writing: $!\n";

    print STATE "configure_version = $config_version\n";
    print STATE "released_version  = $release_version\n";

    close (STATE);
}

sub remove_tempdir($)
{
    my ($tempdir) = @_;

#    print "Cleaning $tempdir...\n";
    system ("rm -rf $tempdir") && die "Error: rm failed: $!\n";
}

sub check_if_file_exists($$)
{
    my ($file, $force) = @_;

    if (-e $file) {
        if (defined $force) {
            print "Warning: $file already exists and will be replaced!\n";
        } else {
            die "Error: $file alrady exists.\n".
                "       Use --force if you want to replace it.\n";
        }
    }
}

sub check_if_already_released($$$$$$$)
{
    my ($lo_core_tarball_name, $p_piece_tarball_name, $force, $bzip2, $xz, $pack_lo_core, $pack_lo_pieces) = @_;

    check_if_file_exists("$lo_core_tarball_name.tar.bz2", $force)  if ($pack_lo_core && defined $bzip2);
    check_if_file_exists("$lo_core_tarball_name.tar.xz", $force) if ($pack_lo_core && defined $xz);

    if ($pack_lo_pieces) {
        foreach my $tarball_name ( values %{$p_piece_tarball_name} ) {
            check_if_file_exists("$tarball_name.tar.bz2", $force) if (defined $bzip2);
            check_if_file_exists("$tarball_name.tar.xz", $force) if (defined $xz);
        }
    }
}

sub prepare_piece_sources($$$$)
{
    my ($piece_dir, $release_version, $piece, $piece_tarball_name) = @_;

    # prepare sources
    my $temp_dir = copy_lo_piece_to_tempdir($piece_dir, $piece, $piece_tarball_name);
    generate_lo_piece_changelog($piece_dir, "$temp_dir/$piece_tarball_name", $piece);
    run_autoreconf("$temp_dir/$piece_tarball_name", $piece) if ($piece eq 'core');
    generate_sources_version_file("$temp_dir/$piece_tarball_name", $release_version) if ($piece eq 'core');

    return $temp_dir;
}

sub pack_piece_sources($$$$)
{
    my ($temp_dir, $md5, $tarball, $tar_compress_option) = @_;

    generate_tarball($temp_dir, $tarball, $tar_compress_option);
    generate_md5($tarball) if (defined $md5);
}

sub generate_piece_tarball($$$$$$$)
{
    my ($piece_dir, $release_version, $piece, $md5, $bzip2, $xz, $piece_tarball_name) = @_;

    my $temp_dir = prepare_piece_sources($piece_dir, $release_version, $piece, $piece_tarball_name);
    pack_piece_sources($temp_dir, $md5, "$piece_tarball_name.tar.bz2", "--bzip2") if (defined $bzip2);
    pack_piece_sources($temp_dir, $md5, "$piece_tarball_name.tar.xz", "--xz") if (defined $xz);
    remove_tempdir($temp_dir);
}


sub generate_tarballs($$$$$$$$$$)
{
    my ($source_dir, $release_version, $md5, $bzip2, $xz, $lo_core_tarball_name, $p_piece_tarball_name, $pack_lo_core, $pack_lo_pieces, $is_lo_core_dir) = @_;

    if ($pack_lo_core) {
        generate_piece_tarball($source_dir, $release_version, "core", $md5, $bzip2, $xz, $lo_core_tarball_name);
    }

    if ($pack_lo_pieces) {
        my $piece_dir = $source_dir;
        foreach my $piece ( keys %{$p_piece_tarball_name} ) {
            print "\n--- Generating $piece ---\n";
            $piece_dir = "$source_dir/clone/$piece" if ($is_lo_core_dir);
            generate_piece_tarball($piece_dir, $release_version, $piece, $md5, $bzip2, $xz, $p_piece_tarball_name->{$piece});
        }
    }
}


sub usage()
{
    print "This tool helps to pack the libreoffice-build and piece sources\n\n" .

          "Usage:\n".
          "\tlo-pack-sources [--help]\n" .
          "\t  [--force] [--md5] [--bzip2] [--xz]\n" .
          "\t [--version][--set-version=<ver>] [--inc-version]\n" .
          "\t [--no-lo-core] [--no-lo-pieces] [--piece=<piece>]\n" .
          "\t [dir]\n\n" .

          "Options:\n\n" .
          "\t--help: print this help\n" .
          "\t--force: replace an already existing release of the same version\n" .
          "\t--md5: generate md5 sum for the final tarball\n" .
          "\t--bzip2: generate tarballs compressed by bzip2\n" .
          "\t--xz: generate tarballs compressed by xz (default)\n" .
          "\t--version: just print version of the released package but do not\n" .
          "\t\trelease it; the version is affected by the other options, e.g.\n" .
          "\t\t--inc-version\n" .
          "\t--set-version: force another version\n" .
          "\t--inc-version: increment the latest version; there is a difference\n" .
          "\t\tbetween test release (default) and final (not yet supported)\n" .
          "\t--no-lo-core: do not pack the libreoffice-core tarball\n" .
          "\t--no-lo-pieces: do not pack the extra LO piece sources\n" .
          "\t--piece=<piece>: pack just a single piece, .e.g. \"help\",\n" .
          "\tdir: path of the source directory, either libreoffice-build or piece\n";
}


my $ptf;
my $md5;
my $bzip2;
my $xz;
my $inc_version;
my $config_version;
my $set_version;
my $get_config_version;
my $release_version;
my $pack_lo_core=1;
my $pack_lo_pieces=1;
my $source_dir;
my $releases_state_file;
my $state_config_version;
my $state_release_version;
my $lo_core_tarball_name;
my $lo_core_tempdir;
my $force;
my $verbose=1;
my $is_lo_core_dir=0;
my @pieces=("binfilter", "dictionaries", "help", "translations");
my %piece_tarball_name;

###################
# Arguments parsing
###################

for my $arg (@ARGV) {
    if ($arg eq '--help' || $arg eq '-h') {
        usage;
        exit 0;
    } elsif ($arg eq '--force') {
        $force=1;
    } elsif ($arg eq '--md5') {
        $md5=1;
    } elsif ($arg eq '--bzip2') {
        $bzip2=1;
    } elsif ($arg eq '--xz') {
        $xz=1;
    } elsif ($arg eq '--version') {
        $get_config_version=1;
        $verbose = undef;
    } elsif ($arg eq '--inc-version') {
        $inc_version=1
    } elsif ($arg =~ m/--set-version=(.*)/) {
          $set_version="$1";
    } elsif ($arg eq '--no-lo-core') {
        $pack_lo_core=0;
    } elsif ($arg eq '--no-lo-pieces') {
        $pack_lo_pieces=0;
    } elsif ($arg =~ m/--piece=(.*)/) {
          # process just one piece and do not pack libreoffice-build
          @pieces=();
          push @pieces, "$1";
          $pack_lo_core=0;
    } elsif ($arg =~ /^-/ ) {
        die "Error: unknown option: $arg\n";
    } else {
        if (! defined $source_dir) {
            $source_dir = $arg;
        } else {
            die "Error: Too many arguments $arg\n";
        }
    }
}

###################
# Initial checks
###################

unless ( defined $source_dir ) {
    die "Error: undefined source directory, try --help\n";
}

unless ( -d "$source_dir" ) {
    die "Error: is not a directory: $source_dir\n";
}

# check if it is a valid libreoffice-core directory
$is_lo_core_dir=1 if (-f "$source_dir/autogen.sh" && -f "$source_dir/config_host.mk.in");

# all tarballs are generated from the libreoffice-core directory
if (@pieces > 1 && $is_lo_core_dir == 0 ) {
    die "Error: \"$source_dir\" is not a valid libreoffice-core directory\n";
}

# just a single piece tarball can be generated from piece directory; version must be explicitly set in this case
if (@pieces == 1  &&  $is_lo_core_dir == 0  &&  ! defined $set_version ) {
    die "Error: version must be set using the --set-version=<version> option\n" unless (defined $set_version);
}

if (defined $set_version && defined $inc_version) {
    die "Error: --set-version and --inc-version options can't be used together\n";
}

# default compression
$xz = 1 unless (defined $xz || defined $bzip2);


###################
# Main logic
###################


print "Source: $source_dir\n" if ($verbose);

if ($is_lo_core_dir) {
    # detect some paths
    $releases_state_file = default_releases_state_file($source_dir) unless (defined $releases_state_file);

    # detect versions
    $config_version = get_config_version($source_dir);
    ($state_config_version, $state_release_version) = load_releases_state($releases_state_file);
    if (defined $set_version) {
        $release_version = "$set_version";
    } else {
        $release_version = get_release_version($config_version, $state_config_version, $state_release_version, $inc_version);
    }
} else {
    # must be single piece release with predefined version
    $release_version = "$set_version";
}

# define tarball names
$lo_core_tarball_name = "libreoffice-core-$release_version";
foreach my $piece (@pieces) {
    if (-d "$source_dir/clone/$piece") {
        $piece_tarball_name{$piece} = "libreoffice-$piece-$release_version";
    } else {
        print "Warning: $piece sources are not available -> skipping\n";
    }
}

print "Default version   : $config_version\n" if ($verbose && defined $config_version);
print "Last used version : $state_release_version\n" if ($verbose && defined $state_release_version);
print "New version       : $release_version\n" if ($verbose);

# do the real job
if ( defined $get_config_version ) {
    print "$release_version\n";
} else {
    check_if_already_released($lo_core_tarball_name, \%piece_tarball_name, $force, $bzip2, $xz, $pack_lo_core, $pack_lo_pieces);

    # give a chance to stop the process
    print ("\nWaiting 3 seconds...\n");
    sleep 3;

    generate_tarballs($source_dir, $release_version, $md5, $bzip2, $xz, $lo_core_tarball_name, \%piece_tarball_name, $pack_lo_core, $pack_lo_pieces, $is_lo_core_dir);

    if ( defined $releases_state_file ) {
        save_releases_state($releases_state_file, $config_version, $release_version);
    }
}