* Custom path to config file can be specified as argument

Author: nazar-pc

changelog.md

@@ -1,10 +1,11 @@
-# 0.x (Unreleased yet)
+# 0.5 (17 May, 2015)
 * Code moved into class
 * Fix for Ubuntu 15.10 (binaries moved from `/usr/sbin` to `/bin`, now both cases are supported)
 * Refactoring into multiple methods
 * Fix for `0` as count of keeping snapshots
 * Real backups to other partition/drive added, not just snapshots
 * Some changes in output messages
+* Custom path to config file can be specified as argument
 
 # 0.1 (Nov 20, 2014)
 * initial release

just-backup-btrfs.php

@@ -8,7 +8,7 @@
  * @author    Nazar Mokrynskyi <[email protected]>
  * @copyright Copyright (c) 2014-2015, Nazar Mokrynskyi
  * @license   http://opensource.org/licenses/MIT
- * @version   0.4
+ * @version   0.5
  */
 class Just_backup_btrfs {
 	/**
@@ -20,10 +20,13 @@ class Just_backup_btrfs {
 	 */
 	protected $binary;
 	/**
-	 * @param array|null $config
+	 * @param array $config
 	 */
-	function __construct ($config = null) {
-		$this->config = $config ?: json_decode(file_get_contents('/etc/just-backup-btrfs.json'), true);
+	function __construct ($config) {
+		if (!$config) {
+			exit("Incorrect configuration, aborted\n");
+		}
+		$this->config = $config;
 		$this->binary = file_exists('/usr/sbin/btrfs') ? '/usr/sbin/btrfs' : '/bin/btrfs';
 	}
 	function backup () {
@@ -392,6 +395,9 @@ protected function snapshots_for_removal ($history_db) {
 
 echo "Just backup btrfs started...\n";
 
-(new Just_backup_btrfs)->backup();
+$Just_backup_btrfs = new Just_backup_btrfs(
+	json_decode(file_get_contents(isset($argv[1]) ? $argv[1] : '/etc/just-backup-btrfs.json'), true)
+);
+$Just_backup_btrfs->backup();
 
 echo "Just backup btrfs finished!\n";

readme.md

@@ -22,7 +22,7 @@ sudo php5enmod sqlite3
 ```
 
 ### Usage
-Script expects configuration file to be present at location `/etc/just-backup-btrfs.json`, example of such file you can find in this repository.
+Script expects configuration file to be present at location `/etc/just-backup-btrfs.json`, example of such file you can find in next section. Also, if you want to use other path to config file - specify it as argument.
 
 There are few ways to run script.
 ```bash
@@ -36,6 +36,11 @@ sudo ./just-backup-btrfs.php
 
 or mark as executable, rename it to `just-backup-btrfs` (since file can't contain dots in that place) and put into `/etc/cron.daily` to make backups every day.
 
+With custom path to config file:
+```bash
+sudo ./just-backup-btrfs.php /path/to/config.json
+```
+
 Output will be like this:
 ```
 nazar-pc@nazar-pc ~> sudo /just-backup-btrfs.php