Add extra-build-dependencies hint for any missing module on build failure

[blueraft]

Alternative to #15251.

As suggested in #15118 (comment)

Test Plan

cargo test

[zanieb]

Sorry I broke main!

[zanieb]

I think you can test this with something like

uv/crates/uv/tests/it/sync.rs

Lines 1571 to 1601 in 323aa8f

	fn sync_extra_build_dependencies() -> Result<()> {
	let context = TestContext::new("3.12").with_filtered_counts();
	// Write a test package that arbitrarily requires `anyio` at build time
	let child = context.temp_dir.child("child");
	child.create_dir_all()?;
	let child_pyproject_toml = child.child("pyproject.toml");
	child_pyproject_toml.write_str(indoc! {r#"
	[project]
	name = "child"
	version = "0.1.0"
	requires-python = ">=3.9"
	[build-system]
	requires = ["hatchling"]
	backend-path = ["."]
	build-backend = "build_backend"
	"#})?;
	let build_backend = child.child("build_backend.py");
	build_backend.write_str(indoc! {r#"
	import sys
	from hatchling.build import *
	try:
	import anyio
	except ModuleNotFoundError:
	print("Missing `anyio` module", file=sys.stderr)
	sys.exit(1)
	"#})?;
	child.child("src/child/__init__.py").touch()?;

[charliermarsh]

I'm a little worried about the impact it will have on binary size, did you check a release build before and after?

[blueraft]

did you check a release build before and after?

Not much of an increase, only 32kbs more

❯ du -sk uv_with_pipreqs
45240   uv_with_pipreqs
❯ du -sk uv_without_pepreqs
45208   uv_without_pepreqs

[zanieb]

Fwiw this instruction isn't sufficient, because then they also need to install all of the other build dependencies of anyio. I'm hesitant to suggest it without that additional information (and broadly hesitant to suggest it at all).

[blueraft]

Yeah I thought about this, but this matches the current hint we give for people facing issues with torch so I figured we shouldn't remove that.

[zanieb]

I think now that we have the extra build dependencies it's actually okay to remove that, but... I'm okay with considering that separately. Can you open a tracking issue?

[blueraft]

#15283