#!/usr/bin/perl -w
# Copyright (C) 2011 Igalia S.L.
# Copyright (C) 2012 Intel Corporation
# Copyright (C) 2013 Nokia Corporation and/or its subsidiary(-ies).
#
# This library is free software; you can redistribute it and/or
# modify it under the terms of the GNU Lesser General Public
# License as published by the Free Software Foundation; either
# version 2 of the License, or (at your option) any later version.
#
# This library is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
# Lesser General Public License for more details.
#
# You should have received a copy of the GNU Lesser General Public
# License along with this library; if not, write to the Free Software
# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA

use FindBin;
use lib $FindBin::Bin;
use webkitdirs;
use Getopt::Long qw(:config pass_through);

my $platform = "";
$platform = "efl" if isEfl();
$platform = "gtk" if isGtk();

if (!$platform) {
    die "No platform specified for " . basename($0) .". Use --gtk or --efl.\n";
}

my $wipeOnChange = $ENV{JHBUILD_WIPE_ON_CHANGE} // 1;
my $force = 0;

GetOptions(
    'wipe-on-change!' => \$wipeOnChange,
    'force' => \$force
);

sub getMD5HashForFile($)
{
    my $file = shift;

    open(FILE_CONTENTS, $file);

    my $contents = "";
    while (<FILE_CONTENTS>) {
        $contents .= $_;
    }

    close(FILE_CONTENTS);

    return md5_hex($contents);
}

sub jhbuildConfigurationChanged()
{
    foreach my $file (qw(jhbuildrc jhbuild.modules)) {
        my $path = join('/', getJhbuildPath(), $file . '.md5sum');
        if (! -e $path) {
            return 1;
        }

        # Get the md5 sum of the file we're testing, look in the right platform directory.
        my $actualFile = join('/', sourceDir(), 'Tools', $platform, $file);
        my $currentSum = getMD5HashForFile($actualFile);

        # Get our previous record.
        open(PREVIOUS_MD5, $path);
        chomp(my $previousSum = <PREVIOUS_MD5>);
        close(PREVIOUS_MD5);

        if ($previousSum ne $currentSum) {
            return 1;
        }
    }
}

sub saveJhbuildMd5() {
    # Save md5sum for jhbuild-related files.saveJhbuildMd5();
    my $jhbuildPath = getJhbuildPath();
    (-d $jhbuildPath) || mkpath $jhbuildPath;
    foreach my $file (qw(jhbuildrc jhbuild.modules)) {
        my $source = join('/', sourceDir(), "Tools", $platform, $file);
        my $destination = join('/', $jhbuildPath, $file);
        open(SUM, ">$destination" . ".md5sum");
        print SUM getMD5HashForFile($source);
        close(SUM);
    }
}

sub deleteJhbuildMd5() {
    my $jhbuildPath = getJhbuildPath();
    if (!-d $jhbuildPath) {
        return;
    }
    foreach my $file (qw(jhbuildrc jhbuild.modules)) {
        my $md5File = join('/', $jhbuildPath, $file) . ".md5sum";
        unlink($md5File) if -e $md5File;
    }
}

sub runJhbuild
{
    my $command = shift;
    my @jhbuildArgs = ("./jhbuild-wrapper", "--".$platform, $command);
    push(@jhbuildArgs, @ARGV[0..$#ARGV]);
    return system(@jhbuildArgs);
}

sub cleanJhbuild()
{
    # If the configuration changed, dependencies may have been removed.
    # Since we lack a granular way of uninstalling those we wipe out the
    # jhbuild root and start from scratch.
    my $jhbuildPath = getJhbuildPath();
    if (system("rm -rf $jhbuildPath/Root") ne 0) {
        die "Cleaning jhbuild root failed!";
    }

    if (system("rm -rf $jhbuildPath/Source") ne 0) {
        die "Cleaning jhbuild sources failed!";
    }

    if (isGtk()) {
        # GTK+ uses a separate build directory.
        system("rm -rf $jhbuildPath/Build");
    }
}

delete $ENV{AR_FLAGS} if exists $ENV{AR_FLAGS};

chdir(relativeScriptsDir() . "/../jhbuild") or die $!;

my %prettyPlatform = ( "efl" => "EFL", "gtk" => "GTK+" );

if (!$force && !jhbuildConfigurationChanged()) {
    print $prettyPlatform{$platform} . " port dependencies are already up to date\n";
    exit 0;
}

if ($wipeOnChange && -e getJhbuildPath()) {
    cleanJhbuild();
}

print "Updating " . $prettyPlatform{$platform} . " port dependencies using jhbuild...\n";
if (runJhbuild("build") == 0) {
    saveJhbuildMd5();
} else {
    deleteJhbuildMd5();
    die "Failed to build " . $prettyPlatform{$platform} . " port dependencies with jhbuild\n";
}