railway scale misclassifies the long --project option as a region assignment

[jaaortega]

Railway CLI version

5.28.1

What happened

I hit this while scripting a scale change with explicit project, environment, and service selectors:

railway scale \
  --project <PROJECT_ID> \
  --environment <ENVIRONMENT> \
  --service <SERVICE_ID> \
  us-west=0 \
  --json

The command fails with:

Invalid replica count `<PROJECT_ID>` in `project=<PROJECT_ID>`

Caused by:
invalid digit found in string

Using the short project option works:

railway scale \
  -p <PROJECT_ID> \
  -e <ENVIRONMENT> \
  -s <SERVICE_ID> \
  us-west=0 \
  --json

Expected behavior

--project <PROJECT_ID> should behave the same as -p <PROJECT_ID>.

Possible cause

I took a quick look at src/commands/scale.rs. The legacy scale argument normalizer recognizes service and environment as long options that take values, but not project:

cli/src/commands/scale.rs

Lines 383 to 389 in 4d49d98

	fn scale_long_flag_takes_value(flag: &str) -> bool {
	matches!(flag, "service" | "environment")
	}
	fn scale_long_flag_is_known(flag: &str) -> bool {
	matches!(flag, "json" | "help" | "version") || scale_long_flag_takes_value(flag)
	}

That appears to cause --project <ID> to be normalized into the positional assignment project=<ID> before Clap parses it.

--project was added to scale in #893, shortly after the scale argument normalizer was introduced in #881.

The current workaround is to use -p.