add recursive hardlink

main.py

@@ -0,0 +1,49 @@
+#!/usr/bin/env python
+
+import logging
+import os
+import sys
+
+
+logging.basicConfig(level=logging.DEBUG)
+
+
+def hardlink_dir(src_dir, dst_dir):
+    logging.info(f'Recursive hardlinking: {src_dir} -> {dst_dir}')
+    src_abs = os.path.abspath(src_dir)
+    dst_abs = os.path.abspath(dst_dir)
+
+    if os.path.isdir(dst_abs):
+        logging.error(f"Destination directory already exists: {dst_dir}")
+        raise RuntimeError(f'dst dir already exists: {dst_dir}')
+
+    recursive_hardlink(src_abs, dst_abs)
+    return
+
+def recursive_hardlink(src, dst):
+    logging.debug(f'Hardlink: {src} -> {dst}')
+    logging.debug(f'Creating top directory: {dst}')
+    os.mkdir(dst)
+
+    with os.scandir(src) as it:
+        for ent in it:
+            if ent.is_symlink():
+                logging.error(f'{ent.path}: symlink, skipping')
+                continue
+            if ent.is_dir(follow_symlinks=False):
+                recursive_hardlink(ent.path, os.path.join(dst, ent.name))
+                continue
+            if ent.is_file(follow_symlinks=False):
+                os.link(ent.path, os.path.join(dst, ent.name), follow_symlinks=False)
+
+
+
+
+def main():
+    if len(sys.argv) != 3:
+        print('Usage: %s SRC DST' % sys.argv[0])
+
+    hardlink_dir(sys.argv[1], sys.argv[2])
+
+if __name__ == '__main__':
+    sys.exit(main())