btrfs snapshot gc

tunasync_snapshot_gc.py

@@ -0,0 +1,36 @@
+#!/usr/bin/env python2
+# -*- coding:utf-8 -*-
+import re
+import sh
+import os
+import argparse
+
+if __name__ == "__main__":
+    parser = argparse.ArgumentParser(prog="tunasync_snapshot_gc")
+    parser.add_argument("--max-level", type=int, default=2, help="max walk level to find garbage snapshots")
+    parser.add_argument("--pattern", default=r"^_gc_\d+", help="pattern to match garbage snapshots")
+    parser.add_argument("mirror_root", help="tunasync mirror root")
+
+    args = parser.parse_args()
+
+    pattern = re.compile(args.pattern)
+
+    def walk(_dir, level=1):
+        if level > 2:
+            return
+
+        for fname in os.listdir(_dir):
+            abs_fname = os.path.join(_dir, fname)
+            if os.path.isdir(abs_fname):
+                if pattern.match(fname):
+                    print("GC: {}".format(abs_fname))
+                    try:
+                        ret = sh.btrfs("subvolume", "delete", abs_fname)
+                    except sh.ErrorReturnCode:
+                        print("Error: {}".format(ret.stderr))
+                else:
+                    walk(abs_fname, level+1)
+
+    walk(args.mirror_root)
+
+# vim: ts=4 sw=4 sts=4 expandtab