/*   cvs_sync
 *   Written by Scott Ullrich
 *   (C)2005-2007 Scott Ullrich
 *   (C)2010-2012 Erik Fonnesbeck
 *   Part of the pfSense project pfSsh.php subsystem
 */

require_once("globals.inc");
require_once("filter.inc");
require_once("shaper.inc");
require_once("rrd.inc");
require_once("pfsense-utils.inc");

$GIT_PKG = "git"; // Either "git" or the full package URL
$GIT_BIN= "/usr/local/bin/git";
$GIT_REPO = "git://github.com/pfsense/pfsense.git";
$DEFAULT_BRANCH = "RELENG_2_3_1";
$CODIR =  "/root/pfsense";
$GITSYNC_MERGE = "/root/.gitsync_merge";

/* NOTE: Set branches here */
$branches = array(
	"master" => "2.4 development branch",
	"RELENG_2_3" => "2.3 development branch",
	"RELENG_2_3_1" => "2.3.1 stable branch",
	"build_commit" => "The commit originally used to build the image"
);

global $g;
global $argv;
global $command_split;

if (is_array($command_split)) {
	$temp_args = array_slice($command_split, 2);
} else {
	$temp_args = array_slice($argv, 3);
}

$valid_args = array(
	"--minimal" => "\tPerform a minimal copy of only the updated files.\n" .
	    "\tNot recommended if the system has files modified by any method other\n" .
	    "\tthan gitsync.\n",
	"--help" => "\tDisplay this help list.\n"
	);
$args = array();
$arg_count = 0;
while (!empty($temp_args)) {
	$arg = array_shift($temp_args);
	if ($arg[0] == '-') {
		switch ($arg) {
			case "--help":
				echo "Usage: playback gitsync [options] [[repository] <branch>]\nOptions:\n";
				foreach ($valid_args as $arg_name => $arg_desc) {
					echo $arg_name . "\n" . $arg_desc;
				}
				exit;
			case "--upgrading":
				// Disables all interactive functions and neither PHP
				// nor the web GUI will be killed or restarted.
				$upgrading = true;
			case (isset($valid_args[$arg])):
				$args[$arg] = true;
				break;
			default:
				echo "Invalid option: {$arg}\nUse --help for usage information.\n";
				exit;
		}
	} else {
		$args[$arg_count++] = $arg;
	}
}

unlink_if_exists("/tmp/config.cache");
conf_mount_rw();

if (!file_exists($GIT_BIN)) {
	require_once("pkg-utils.inc");

	echo "Cannot find git, installing...\n";
	if (!pkg_call('install -y -q git')) {
		echo "\nERROR: Unable to install git pkg.\n";
		return;
	}
}

# Remove mainline if exists (older)
if (is_dir("/root/pfsense/mainline")) {
	exec("rm -rf /root/pfsense/mainline");
}

# Remove RELENG_1_2 if exists (older)
if (is_dir("/root/pfsense/RELENG_1_2")) {
	exec("rm -rf /root/pfsense/RELENG_1_2");
}

# Remove HEAD if exists (older)
if (is_dir("/root/pfsense/HEAD")) {
	exec("rm -rf /root/pfsense/HEAD");
}

if (file_exists("/root/cvssync_backup.tgz")) {
	$backup_date = `ls -lah /root/cvssync_backup.tgz | awk '{ print $6,$7,$8 }'`;
	$tmp = array("RESTORE" => "Restores prior CVSSync backup data performed at {$backup_date}");
	$branches = array_merge($branches, $tmp);
}

if (is_dir("$CODIR/pfSenseGITREPO/pfSenseGITREPO")) {
	exec("cd $CODIR/pfSenseGITREPO/pfSenseGITREPO && {$GIT_BIN} config remote.origin.url", $output_str, $ret);
	if (is_array($output_str) && !empty($output_str[0])) {
		$GIT_REPO = $output_str[0];
	}
	unset($output_str);
}

if (!$args[0] && !$upgrading) {
	echo "\nCurrent repository is $GIT_REPO\n";
	echo "\nPlease select which branch you would like to sync against:\n\n";
	foreach ($branches as $branchname => $branchdesc) {
		echo "{$branchname} \t {$branchdesc}\n";
	}
	echo "\nOr alternatively you may enter a custom RCS branch URL (Git or HTTP).\n\n";
	$branch = readline("> ");
	echo "\n";
} else {
	$branch = $args[0];
}

if ($args[1] == "NOBACKUP") {
	$nobackup = true;
} else {
	$nobackup = false;
}

// If the repository has been fetched before, build a list of its branches.
if (is_dir("$CODIR/pfSenseGITREPO/pfSenseGITREPO")) {
	exec("cd $CODIR/pfSenseGITREPO/pfSenseGITREPO && {$GIT_BIN} branch -r", $branch_list, $ret);
	if ($ret == 0 && is_array($branch_list)) {
		foreach ($branch_list as $branch_item) {
			$branch_item = substr(strrchr($branch_item, "/"), 1);
			if (!isset($branches[$branch_item])) {
				$branches[$branch_item] = " ";
			}
		}
	}
}

$found = false;
foreach ($branches as $branchname => $branchdesc) {
	if ($branchname == $branch) {
		$found = true;
		break;
	}
}
if (!$found) {
	if (isURL($branch) && !$upgrading) {
		if ($args[1]) {
			$GIT_REPO = $branch;
			$branch = $args[1];
			$found = true;
		} else {
			echo "\n";
			echo "NOTE: $branch was not found.\n\n";
			$command = readline("Is this a custom GIT URL? [y]? ");
			if (strtolower($command) == "y" or $command == "") {
				$GIT_REPO = $branch;
				$command = readline("Checkout which branch [${DEFAULT_BRANCH}]? ");
				if ($command == "") {
					$branch = $DEFAULT_BRANCH;
				}
				if ($command) {
					$branch = $command;
				}
				$found = true;
			}
		}
	}
	if (!$found) {
		echo "\nNo valid branch found.  Exiting.\n\n";
		conf_mount_ro();
		exit;
	}
}

$merge_repos = array();
if (file_exists($GITSYNC_MERGE)) {
	$gitsync_merges = file($GITSYNC_MERGE, FILE_IGNORE_NEW_LINES | FILE_SKIP_EMPTY_LINES);
	if (!empty($gitsync_merges) && is_array($gitsync_merges)) {
		echo "\n===> Automatic merge list read from ${GITSYNC_MERGE}\n";
		foreach ($gitsync_merges as $merge_line_num => $merge_line) {
			$merge_comments = explode("#", trim($merge_line));
			if (empty($merge_comments[0])) {
				continue;
			}

			$merge_line = explode(" ", trim($merge_comments[0]));
			if (count($merge_line) != 2 || empty($merge_line[0]) || empty($merge_line[1])) {
				echo "\nLine " . ($merge_line_num + 1) . " does not have the correct parameter count or has improper spacing.\n";
				echo "Expected parameters:  repository_url branch\n";
				echo "Line read:  " . implode(" ", $merge_line) . "\n\n";
				echo "Aborting automatic merge.\n\n";
				$merge_repos = array();
				break;
			}
			$merge_repos[] = array('repo' => $merge_line[0], 'branch' => $merge_line[1]);
		}
	}
}
if (!$args[0] && !$upgrading) {
	do {
		echo "\nAdd a custom RCS branch URL (Git or HTTP) to merge in or press enter if done.\n\n";
		$merge_repo = readline("> ");
		if (!empty($merge_repo)) {
			$merge_branch = readline("Merge which branch [${DEFAULT_BRANCH}]? ");
			if ($merge_branch == "") {
				$merge_repos[] = array('repo' => $merge_repo, 'branch' => $DEFAULT_BRANCH);
			} else if ($merge_branch) {
				$merge_repos[] = array('repo' => $merge_repo, 'branch' => $merge_branch);
			}
		}
	} while (!empty($merge_repo));
}

if ($branch == "RESTORE" && $g['platform'] == $g['product_name']) {
	if (!file_exists("/root/cvssync_backup.tgz")) {
		echo "Sorry, we could not find a previous CVSSync backup file.\n";
		conf_mount_ro();
		exit();
	}
	echo "===> Restoring previous CVSSync backup... Please wait...\n";
	exec("tar Uxpf /root/cvssync_backup.tgz -C /");
	post_cvssync_commands();
	conf_mount_ro();
	exit();
} else {
	$nobackup = true; // do not backup embedded
}

if ($nobackup == false) {
	echo "===> Backing up current pfSense information...\n";
	echo "===> Please wait... ";
	exec("tar czPf /root/cvssync_backup.tgz --exclude /root --exclude /dev --exclude /tmp --exclude /var/run --exclude /var/empty /");
	$size = filesize("/root/cvssync_backup.tgz");
	echo "{$size} bytes.\n\n";
	sleep(5);
}

echo "===> Checking out $branch\n";

// Git commands for resetting to the specified branch
if ($branch == "build_commit") {
	$git_cmd = array(
		"cd $CODIR/pfSenseGITREPO/pfSenseGITREPO && {$GIT_BIN} branch " . escapeshellarg($branch) . " 2>/dev/null",
		"cd $CODIR/pfSenseGITREPO/pfSenseGITREPO && {$GIT_BIN} checkout -f " . escapeshellarg($branch) . " 2>/dev/null",
		"cd $CODIR/pfSenseGITREPO/pfSenseGITREPO && {$GIT_BIN} reset --hard " . escapeshellarg(trim(file_get_contents("/etc/version.lastcommit")))
	);
} else {
	$git_cmd = array(
		"cd $CODIR/pfSenseGITREPO/pfSenseGITREPO && {$GIT_BIN} branch " . escapeshellarg($branch) . " " . escapeshellarg("origin/{$branch}") . " 2>/dev/null",
		"cd $CODIR/pfSenseGITREPO/pfSenseGITREPO && {$GIT_BIN} checkout -f " . escapeshellarg($branch) . " 2>/dev/null",
		"cd $CODIR/pfSenseGITREPO/pfSenseGITREPO && {$GIT_BIN} reset --hard " . escapeshellarg("origin/{$branch}")
	);
}

// Git 'er done!
if (is_dir("$CODIR/pfSenseGITREPO/pfSenseGITREPO")) {
	echo "===> Fetching updates...\n";
	exec("cd $CODIR/pfSenseGITREPO/pfSenseGITREPO && {$GIT_BIN} config remote.origin.url " . escapeshellarg($GIT_REPO));
	exec("cd $CODIR/pfSenseGITREPO/pfSenseGITREPO && {$GIT_BIN} fetch");
	exec("cd $CODIR/pfSenseGITREPO/pfSenseGITREPO && {$GIT_BIN} clean -f -x -d");
	run_cmds($git_cmd);
} else {
	exec("mkdir -p $CODIR/pfSenseGITREPO");
	echo "Executing cd $CODIR/pfSenseGITREPO && {$GIT_BIN} clone $GIT_REPO pfSenseGITREPO\n";
	exec("cd $CODIR/pfSenseGITREPO && {$GIT_BIN} clone " . escapeshellarg($GIT_REPO) . " pfSenseGITREPO");
	if (is_dir("$CODIR/pfSenseGITREPO/pfSense")) {
		exec("mv $CODIR/pfSenseGITREPO/pfSense $CODIR/pfSenseGITREPO/pfSenseGITREPO");
	}
	if (is_dir("$CODIR/pfSenseGITREPO/mainline")) {
		exec("mv $CODIR/pfSenseGITREPO/mainline $CODIR/pfSenseGITREPO/pfSenseGITREPO");
	}
	run_cmds($git_cmd);
}

foreach ($merge_repos as $merge_repo) {
	echo "===> Merging branch {$merge_repo['branch']} from {$merge_repo['repo']}\n";
	exec("cd $CODIR/pfSenseGITREPO/pfSenseGITREPO && {$GIT_BIN} pull " . escapeshellarg($merge_repo['repo']) . " " . escapeshellarg($merge_repo['branch']), $output_str, $ret);
	unset($output_str);
	if ($ret <> 0) {
		echo "\nMerge failed.  Aborting sync.\n\n";
		run_cmds($git_cmd);
		conf_mount_ro();
		exit;
	}
}

if (isset($args["--minimal"])) {
	if (file_exists("/etc/version.gitsync")) {
		$old_revision = trim(file_get_contents("/etc/version.gitsync"));
	} else if (file_exists("/etc/version.lastcommit")) {
		$old_revision = trim(file_get_contents("/etc/version.lastcommit"));
	}
	$files_to_copy = strtr(shell_exec("cd $CODIR/pfSenseGITREPO/pfSenseGITREPO && {$GIT_BIN} diff --name-only --relative=src " . escapeshellarg($old_revision)), "\n", " ");
} else {
	$files_to_copy = '-C ./src .';
}

// Save new commit ID for later minimal file copies
exec("cd $CODIR/pfSenseGITREPO/pfSenseGITREPO && {$GIT_BIN} rev-parse -q --verify HEAD > /etc/version.gitsync");

// Remove files that we do not want to overwrite the system with
@unlink("{$CODIR}/pfSenseGITREPO/pfSenseGITREPO/src/etc/crontab");
@unlink("{$CODIR}/pfSenseGITREPO/pfSenseGITREPO/src/etc/master.passwd");
@unlink("{$CODIR}/pfSenseGITREPO/pfSenseGITREPO/src/etc/passwd");
@unlink("{$CODIR}/pfSenseGITREPO/pfSenseGITREPO/src/etc/fstab");
@unlink("{$CODIR}/pfSenseGITREPO/pfSenseGITREPO/src/etc/ttys");
@unlink("{$CODIR}/pfSenseGITREPO/pfSenseGITREPO/src/etc/group");
@unlink("{$CODIR}/pfSenseGITREPO/pfSenseGITREPO/src/etc/fstab");
@unlink("{$CODIR}/pfSenseGITREPO/pfSenseGITREPO/src/etc/platform");
@unlink("{$CODIR}/pfSenseGITREPO/pfSenseGITREPO/src/boot/device.hints");
@unlink("{$CODIR}/pfSenseGITREPO/pfSenseGITREPO/src/boot/loader.conf");
@unlink("{$CODIR}/pfSenseGITREPO/pfSenseGITREPO/src/boot/loader.rc");
@unlink("{$CODIR}/pfSenseGITREPO/pfSenseGITREPO/src/etc/syslog.conf");
@unlink("{$CODIR}/pfSenseGITREPO/pfSenseGITREPO/src/root/.shrc");
@unlink("{$CODIR}/pfSenseGITREPO/pfSenseGITREPO/src/root/.tcshrc");
exec("rm -rf {$CODIR}/pfSenseGITREPO/pfSenseGITREPO/src/conf*");
exec("rm -rf {$CODIR}/pfSenseGITREPO/pfSenseGITREPO/src/cf 2>/dev/null");
@chmod("{$CODIR}/pfSenseGITREPO/pfSenseGITREPO/src/tmp", 01777);

echo "===> Installing new files...\n";

if ($g['platform'] == $g['product_name']) {
	$command = "cd $CODIR/pfSenseGITREPO/pfSenseGITREPO ; tar -cpf - {$files_to_copy} | (cd / ; tar -Uxpf -)";
} else {
	$command = "cd $CODIR/pfSenseGITREPO/pfSenseGITREPO ; tar -cpf - {$files_to_copy} | (cd / ; tar -xpf -) 2>/dev/null";
}

if (!empty($files_to_copy)) {
	exec($command);
} else {
	echo "Already up-to-date.\n";
	$upgrading = true;
}

// Reset the repository to restore the deleted files
exec("cd $CODIR/pfSenseGITREPO/pfSenseGITREPO && {$GIT_BIN} reset --hard >/dev/null 2>/dev/null");

// Remove obsolete files
$files_to_remove = file("/etc/pfSense.obsoletedfiles");
foreach ($files_to_remove as $file_to_remove) {
	if (file_exists($file_to_remove)) {
		exec("/bin/rm -f $file_to_remove");
	}
}

if (!$upgrading) {
	post_cvssync_commands();
}

echo "===> Checkout complete.\n";
echo "\n";
if (!$upgrading) {
	echo "Your system is now sync'd and PHP and nginx will be restarted in 5 seconds.\n\n";
} else {
	echo "Your system is now sync'd.\n\n";
}

function post_cvssync_commands() {
	echo "===> Removing FAST-CGI temporary files...\n";
	exec("find /tmp -name \"php-fastcgi.socket*\" -exec rm -rf {} \;");
	exec("find /tmp -name \"*.tmp\" -exec rm -rf {} \;");

	exec("rm -rf /tmp/xcache/* 2>/dev/null");

	echo "===> Upgrading configuration (if needed)...\n";
	convert_config();

	echo "===> Configuring filter...";
	exec("/etc/rc.filter_configure_sync");
	exec("pfctl -f /tmp/rules.debug");
	echo "\n";

	if (file_exists("/etc/rc.php_ini_setup")) {
		echo "===> Running /etc/rc.php_ini_setup...";
		exec("/etc/rc.php_ini_setup >/dev/null 2>&1");
		echo "\n";
	}

	/* lock down console if necessary */
	echo "===> Locking down the console if needed...\n";
	reload_ttys();

	echo "===> Signaling PHP and nginx restart...";
	$fd = fopen("/tmp/restart_nginx", "w");
	fwrite($fd, "#!/bin/sh\n");
	fwrite($fd, "sleep 5\n");
	fwrite($fd, "/usr/local/sbin/pfSctl -c 'service restart webgui'\n");
	fclose($fd);
	mwexec_bg("sh /tmp/restart_nginx");
	echo "\n";

}

function isUrl($url = "") {
	if ($url) {
		if (strstr($url, "rcs.pfsense.org") or
			strstr($url, "mainline") or
			strstr($url, ".git") or
			strstr($url, "git://")) {
			return true;
		}
	}
	return false;
}

function run_cmds($cmds) {
	global $debug;
	foreach ($cmds as $cmd) {
		if ($debug) {
			echo "Running $cmd";
		}
		exec($cmd);
	}
}

conf_mount_ro();
