feat(cli.py): Added support for extra git CLI args after -- separator for cz commit command

Additional edits were made in class `commitizen.commands.Commit` and `commit` func from `commitizen.git`

Closes #451

Author: Sebastien Crocquevieille

commitizen/cli.py

@@ -12,6 +12,7 @@
     CommitizenException,
     ExitCode,
     ExpectedExit,
+    InvalidCommandArgumentError,
     NoCommandFoundError,
 )
 
@@ -374,7 +375,7 @@ def main():
 
     # This is for the command required constraint in 2.0
     try:
-        args = parser.parse_args()
+        args, unknown_args = parser.parse_known_args()
     except (TypeError, SystemExit) as e:
         # https://github.com/commitizen-tools/commitizen/issues/429
         # argparse raises TypeError when non exist command is provided on Python < 3.9
@@ -383,6 +384,24 @@ def main():
             raise NoCommandFoundError()
         raise e
 
+    arguments = vars(args)
+    if unknown_args:
+        # Raise error for extra-args without -- separation
+        if "--" not in unknown_args:
+            raise InvalidCommandArgumentError(
+                f"Invalid commitizen arguments were found: `{' '.join(unknown_args)}`. "
+                "Please use -- separator for extra git args"
+            )
+        # Raise error for extra-args before --
+        elif unknown_args[0] != "--":
+            pos = unknown_args.index("--")
+            raise InvalidCommandArgumentError(
+                f"Invalid commitizen arguments were found before -- separator: `{' '.join(unknown_args[:pos])}`. "
+            )
+        # TODO: treat case when extra-args and commitizen args are identical
+        extra_args = " ".join(unknown_args[1:])
+        arguments["extra_cli_args"] = extra_args
+
     if args.name:
         conf.update({"name": args.name})
     elif not args.name and not conf.path:
@@ -398,7 +417,7 @@ def main():
         )
         sys.excepthook = no_raise_debug_excepthook
 
-    args.func(conf, vars(args))()
+    args.func(conf, arguments)()
 
 
 if __name__ == "__main__":

commitizen/commands/commit.py

@@ -83,6 +83,9 @@ def __call__(self):
 
         if signoff:
             c = git.commit(m, "-s")
+
+        if self.arguments.get("extra_cli_args"):
+            c = git.commit(m, extra_args=self.arguments.get("extra_cli_args"))
         else:
             c = git.commit(m)
 

commitizen/git.py

@@ -92,11 +92,11 @@ def tag(tag: str, annotated: bool = False, signed: bool = False) -> cmd.Command:
     return c
 
 
-def commit(message: str, args: str = "") -> cmd.Command:
+def commit(message: str, args: str = "", *, extra_args: str = "") -> cmd.Command:
     f = NamedTemporaryFile("wb", delete=False)
     f.write(message.encode("utf-8"))
     f.close()
-    c = cmd.run(f"git commit {args} -F {f.name}")
+    c = cmd.run(f"git commit {args} {extra_args} -F {f.name}")
     os.unlink(f.name)
     return c