dirname: Add dirname.py

Author: Expertcoderz

src/dirname.py

@@ -0,0 +1,35 @@
+#!/usr/bin/python3
+
+import os
+from optparse import OptionParser
+
+
+def dirname(opts, names: list[str]):
+    for name in names:
+        print(os.path.dirname(name) or ".", end="\0" if opts.zero else "\n")
+
+
+if __name__ == "__main__":
+    parser = OptionParser(
+        usage="Usage: %prog [OPTION]... NAME...",
+        description=(
+            "Print each path NAME with the last component removed,"
+            " or '.' if NAME is the only component."
+        ),
+        add_help_option=False,
+    )
+    parser.add_option("--help", action="help", help="show usage information and exit")
+
+    parser.add_option(
+        "-z",
+        "--zero",
+        action="store_true",
+        help="terminate outputs with NUL instead of newline",
+    )
+
+    opts, args = parser.parse_args()
+
+    if not args:
+        parser.error("missing operand")
+
+    dirname(opts, args)