cli: Can't escape initial at (@) in parameter

[pyhedgehog]

Description

Symbol "@" in all parameter values parsed as file reference, and I found no way to override this behaviour.

python-gitlab/gitlab/cli.py

Lines 274 to 285 in 9c24657

	def _parse_value(v: Any) -> Any:
	if isinstance(v, str) and v.startswith("@"):
	# If the user-provided value starts with @, we try to read the file
	# path provided after @ as the real value. Exit on any error.
	try:
	with open(v[1:], encoding="utf-8") as f:
	return f.read()
	except Exception as e:
	sys.stderr.write(f"{e}\n")
	sys.exit(1)
	return v

Expected Behavior

gitlab project-tag delete --project-id somenamespace/myproject --name '@at-started-tag'

Command executed without errors and tag is deleted.

Actual Behavior

$ gitlab project-tag delete --project-id somenamespace/myproject --name '@at-started-tag'
[Errno 2] No such file or directory: 'at-started-tag'

[JohnVillalovos]

Yes that does seem like a use-case not considered before. I'm not sure the best way to fix that.

My initial thought would be to be able to do: \@at-started-tag and the code could check for content starting with \@ and if so return back the value without the backslash.

@nejch Do you have any ideas?

[pyhedgehog]

@JohnVillalovos as soon as this is place-specific escape (i.e. it should not be replaced anywhere else except string start) I'd prefer @@.

[nejch]

A bit late to the party here sorry folks! :) @JohnVillalovos @pyhedgehog I like the idea with an escape character and \ is more standard. Although @@ does look a bit more pleasing visually and is consistent with GitLab's double-escaping dollar signs in variables (https://docs.gitlab.com/ee/ci/variables/#use-the--character-in-cicd-variables). So maybe we could go with that.

[pyhedgehog]

@nejch It's in line with $$ in gitlab CICD, docker-compose.yml, and '' in SQL strings. :-)
If you like this, you can just approve my PR. If you prefer backslash tell me, i'll change my PR.

[JohnVillalovos]

I'm perfectly fine with @@