feat: check dir size backup script

files/check_dir_size_for_backup.py

@@ -0,0 +1,41 @@
+#!/usr/bin/python
+
+import subprocess
+import sys
+import os
+import argparse
+
+if __name__ == "__main__":
+
+    parser = argparse.ArgumentParser(description="Backup Dir Size helper")
+    parser.add_argument('PATH')
+    args = parser.parse_args()
+    
+    # check parameter #
+    if not args.PATH.replace("/", "").isalnum():
+        print("Illegal Path: {} (must be alphanum + /)".format(args.PATH))
+        sys.exit(1)
+    elif not args.PATH.startswith("/"):
+        print("Path mus be absolute ({})".format(args.PATH))
+        sys.exit(1)
+    elif not os.path.isdir(args.PATH):
+        print("Path does not exist ({}".format(args.PATH))
+        sys.exit(1)
+
+    savepath = os.path.join("/", args.PATH.replace("/", "-"))
+    currentSize = 0
+    if os.path.isfile(savepath):
+        with open(savepath) as f:
+            currentSize = int(f.read())
+
+    # check #
+    p = subprocess.run(["du", args.PATH], capture_output=True, encoding="utf-8")
+    size = int(p.stdout.split("\n")[-2].split("\t")[0])
+    
+    if currentSize and currentSize == size:
+        sys.exit(2)
+    else:
+        print("Directory has changed {} to {}".format(currentSize, size))
+        with open(savepath, "w") as f:
+            f.write(str(size))
+        sys.exit(0)