avargas · November 5, 2015 16:21 · Nov 5, 2015
diff --git a/run-lock.php b/run-lock.php
@@ -0,0 +1,45 @@
+<?php
+
+
+// simple lock, prevent script from running multiple times at once
+$lockfile = '/tmp/.run.php-lock-' . md5(implode('', array_slice($argv, 1)));
+if (($lock = fopen($lockfile, 'w+')) === false) {
+  echo "fopen($lockfile) failed\n";
+  die(-1);
+}
+
+// lock that bitch
+if (flock($lock, LOCK_EX | LOCK_NB) === false) {
+  echo "flock($lockfile) failed - possibly already running?\n";
+  die(-1);
+}
+
+$unlock = function() use (&$lock, $lockfile) {
+  printf("unlocking %s\n", $lockfile);
+
+  if (is_resource($lock)) {
+    fclose($lock);
+  }
+
+  if (file_exists($lockfile)) {
+    unlink($lockfile);
+  }
+};
+
+// just in case something fails, clean up
+register_shutdown_function($unlock);
+
+// create the actual command
+
+array_shift($argv);
+
+$command = [];
+foreach ($argv as $arg) {
+  $command[] = '"' . str_replace('"', '\"', $arg) . '"';
+}
+
+$command = implode(' ', $command);
+
+echo "running $command\n\n";
+
+passthru($command);