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<?php
/**
 * Git 根据commit id 自动打更新包
 * @author MAGENJIE(magenjie@feeyo.com)
 * @datetime 2016-11-04T14:58:08+0800
 */
ini_set('date.timezone','Asia/Shanghai');
echo "git pull origin master | please wait...".PHP_EOL;
exec("git pull origin master").PHP_EOL;
echo "git pull success!".PHP_EOL;
echo "git log --pretty=format:\"%h--%an--%ad--%s\" --date=format:%Y%m%d%H%M --since=2.days".PHP_EOL;
exec("git log --pretty=format:\"%h--%an--%ad--%s\" --date=format:%Y%m%d%H%M --since=2.days > git_log.txt").PHP_EOL;
if (file_exists("git_log.txt")) {
	$log = readGitLog();
	if (!file_exists("last_commit_id.txt")) {
		echo "last_commit_id.txt not exists,please check it!";return;
	}
	$old_commit_id = readLastCommitId();
	if ($old_commit_id === FALSE) {
		echo "last_commit_id not exists!";return;	
	}
	echo "last_commit_id: {$old_commit_id}".PHP_EOL;
	$text = "";
	foreach ($log as $key => $value) {
		if ($key === 0) {
			$new_commit_id = $value[0];
			$new_commit_date = $value[2];
		}
		$text .= $value[3];
		if ($value[0] === $old_commit_id) {
			break;
		}
	}
	$file_name = "goms-tsn-{$new_commit_date}.tar.gz";
	echo "Filename: {$file_name}".PHP_EOL;
	exec("git diff {$old_commit_id} {$new_commit_id} --name-only | xargs tar -czvf patches/{$file_name}",$out,$var);
	echo "new_commit_id: {$new_commit_id}".PHP_EOL;
	echo "########################".PHP_EOL;
	if ($var) {
		echo "#########Failed#########".PHP_EOL;
	}else{
		echo "########Success!########".PHP_EOL;
		exec("rm -rf git_log.txt");
		file_put_contents("last_commit_id.txt",$new_commit_id." ".$new_commit_date." ".date("Y-m-d H:i:s").PHP_EOL,FILE_APPEND);
		file_put_contents("email.txt",$text.PHP_EOL.$file_name);
	}
	echo "########################".PHP_EOL;
}else{
	echo "The command done failed ! log file not find!";
}

function readGitLog(){
	$file = fopen("git_log.txt", "r");
	$log = array();
	$i = 0;
	while(!feof($file)){
		$content = fgets($file);//fgets()函数从文件指针中读取一行
		if (empty($content)) {
			continue;
		}
		$log[$i] = explode("--",$content);
		$i++;
	}
	fclose($file);
	return $log;
}

function readLastCommitId(){
	$fp = fopen("last_commit_id.txt", 'r');
	fseek($fp, -1, SEEK_END);
	$s = '';
	while(($c = fgetc($fp)) !== false) {
		if($c == "\n" && $s) break;
		$s = $c . $s;
		fseek($fp, -2, SEEK_CUR);
	}
	fclose($fp);
	if (empty($s)) {
		return FALSE;
	}else{
		return explode(" ",$s)[0];
	}
}
?>