1 files changed, 51 insertions, 0 deletions
diff --git a/examples/renumber.py b/examples/renumber.py
new file mode 100755
index 0000000..747bf6e
--- /dev/null
+++ b/examples/renumber.py
@@ -0,0 +1,51 @@
+#!/usr/bin/env python3
+
+import argparse
+import os
+import re
+
+
+def _main():
+    example_dir = os.path.dirname(__file__)
+
+    args = _parse_args()
+
+    renames = []
+
+    for name in sorted(os.listdir(example_dir)):
+        path = os.path.join(example_dir, name)
+        match = re.match("([0-9]+)(-.*)", name)
+
+        if os.path.isdir(path) and match is not None:
+            old_number = int(match[1])
+            is_in_range = (
+                (args.from_number is None or args.from_number <= old_number) and
+                (args.to_number is None or old_number <= args.to_number)
+            )
+            if is_in_range:
+                new_number = old_number + args.delta
+                new_name = f"{new_number:02}{match[2]}"
+                new_path = os.path.join(example_dir, new_name)
+                print(f"{name} -> {new_name}")
+
+                if os.path.exists(new_path):
+                    raise ValueError("destination already exists")
+
+                renames.append((path, new_path))
+
+    for old_path, new_path in renames:
+        os.rename(old_path, new_path)
+
+
+def _parse_args():
+    parser = argparse.ArgumentParser()
+
+    parser.add_argument("--delta", required=True, type=int)
+    parser.add_argument("--from", required=False, type=int, dest="from_number")
+    parser.add_argument("--to", required=False, type=int, dest="to_number")
+
+    return parser.parse_args()
+
+
+if __name__ == "__main__":
+    _main()