Check whether we can json decode the translations

Signed-off-by: Joas Schilling <coding@schilljs.com>

.drone.yml

@@ -26,6 +26,13 @@ pipeline:
     when:
       matrix:
         TESTS: check-mergejs
+  translation-check:
+    image: nextcloudci/php7.0:php7.0-7
+    commands:
+      - php ./build/translation-checker.php
+    when:
+      matrix:
+        TESTS: translation-check
   app-check-code:
     image: nextcloudci/php7.0:php7.0-7
     commands:

build/translation-checker.php

@@ -0,0 +1,81 @@
+<?php
+/**
+ * @copyright Copyright (c) 2017 Joas Schilling <coding@schilljs.com>
+ *
+ * @license GNU AGPL version 3 or any later version
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as
+ * published by the Free Software Foundation, either version 3 of the
+ * License, or (at your option) any later version.
+ *
+ * This program 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 Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+$directories = [
+	__DIR__ . '/../core/l10n',
+	__DIR__ . '/../settings/l10n',
+	__DIR__ . '/../apps/admin_audit/l10n',
+	__DIR__ . '/../apps/comments/l10n',
+	__DIR__ . '/../apps/dav/l10n',
+	__DIR__ . '/../apps/encryption/l10n',
+	__DIR__ . '/../apps/federatedfilesharing/l10n',
+	__DIR__ . '/../apps/federation/l10n',
+	__DIR__ . '/../apps/files/l10n',
+	__DIR__ . '/../apps/files_external/l10n',
+	__DIR__ . '/../apps/files_sharing/l10n',
+	__DIR__ . '/../apps/files_trashbin/l10n',
+	__DIR__ . '/../apps/files_versions/l10n',
+	__DIR__ . '/../apps/lookup_server_connector/l10n',
+	__DIR__ . '/../apps/provisioning_api/l10n',
+	__DIR__ . '/../apps/sharebymail/l10n',
+	__DIR__ . '/../apps/systemtags/l10n',
+	__DIR__ . '/../apps/testing/l10n',
+	__DIR__ . '/../apps/theming/l10n',
+	__DIR__ . '/../apps/twofactor_backupcodes/l10n',
+	__DIR__ . '/../apps/updatenotification/l10n',
+	__DIR__ . '/../apps/user_ldap/l10n',
+	__DIR__ . '/../apps/workflowengine/l10n',
+];
+
+$errors = [];
+foreach ($directories as $dir) {
+	if (!file_exists($dir)) {
+		continue;
+	}
+	$directory = new \DirectoryIterator($dir);
+
+	foreach ($directory as $file) {
+		if ($file->getExtension() !== 'json') {
+			continue;
+		}
+
+		$content = file_get_contents($file->getPathname());
+		$json = json_decode($content, true);
+
+		if (json_last_error() !== JSON_ERROR_NONE) {
+			echo '[Error] Could not parse: ' . $file->getPathname() . "\n";
+			echo '  ' . json_last_error_msg() . "\n";
+			$errors[] = $file->getPathname() . "\n" . '  ' . json_last_error_msg() . "\n";
+		} else {
+			echo '[OK]   ' . $file->getPathname() . "\n";
+		}
+	}
+}
+
+echo "\n\n";
+if (count($errors) > 0) {
+	echo sprintf('ERROR: There were %d errors:', count($errors)) . "\n";
+	echo implode("\n", $errors);
+	exit(1);
+}
+
+echo 'OK: all files parse';
+exit(0);