fly launch can't detect a Python FastAPI app with a dependency group specifier

[xavdid]

Describe the bug

I'm making a FastAPI Python project and saw in this post that non-poetry projects are supported. But, running fly launch doesn't recognize my code as a FastAPI project. I'm not using poetry, but do have a valid pyproject.toml.

The issue is that I'm using the default dependency specifier from the FastAPI Docs: fastapi[standard].

flyctl correctly finds and parses my pyproject.toml, this function doesn't correctly handle the [standard] extra:

flyctl/scanner/python.go

Lines 93 to 108 in 09e201b

	func parsePyDep(dep string) string {
	// remove all version constraints from a python dependency
	// e.g. "fastapi>=0.1.0" -> "fastapi"
	// e.g. "flask" -> "flask"
	// e.g. "pytest < 5.0.0" -> "pytest"
	// e.g. "numpy~=1.19.2" -> "numpy"
	// e.g. "django>2.1; os_name != 'nt'" -> "django"
	dep = strings.ToLower(dep)
	dep = strings.Split(dep, ";")[0]
	dep = strings.Split(dep, " ")[0]
	dep = strings.Split(dep, "==")[0]
	dep = strings.Split(dep, ">")[0]
	dep = strings.Split(dep, "<")[0]
	dep = strings.Split(dep, "~=")[0]
	return dep
	}

When I change my dependency from "fastapi[standard] == 0.115.5" to "fastapi == 0.115.5", it all works as expected.

• Operating system: macOS Ventura
• fly v0.3.40 darwin/arm64 Commit: 0a5966dcd8a4a7ae3a71623f9f04371a3e7f27ae BuildDate: 2024-11-19T20:46:55Z

Paste your fly.toml

N/A, trying to create one

Command output:

fly launch --no-deploy
Scanning source code
INFO Detected pyproject.toml
WARN No supported Python frameworks found
Could not find a Dockerfile, nor detect a runtime or framework from source code. Continuing with a blank app.