Respect subdirectories when locating Git workspaces (#5944)

## Summary

We were discovering the workspace from the Git repository root, so
attempting to build any subdirectories would fail.

Closes #5942.

## Test Plan

```
cargo run pip install \
	git+https://github.com/flyteorg/flytekit.git@master#subdirectory=plugins/flytekit-flyteinteractive
```

crates/uv-distribution/src/source/mod.rs

@@ -1249,11 +1249,17 @@ impl<'a, T: BuildContext> SourceDistributionBuilder<'a, T> {
  .await
  .map_err(Error::CacheWrite)?;
 
+ let path = if let Some(subdirectory) = resource.subdirectory {
+ Cow::Owned(fetch.path().join(subdirectory))
+ } else {
+ Cow::Borrowed(fetch.path())
+ };
+
  return Ok(ArchiveMetadata::from(
  Metadata::from_workspace(
  metadata,
- fetch.path(),
- fetch.path(),
+ &path,
+ &path,
  self.build_context.sources(),
  self.preview_mode,
  )

crates/uv/tests/lock.rs

@@ -500,6 +500,92 @@ fn lock_sdist_git() -> Result<()> {
  Ok(())
 }
 
+/// Lock a Git requirement using PEP 508.
+#[test]
+#[cfg(feature = "git")]
+fn lock_sdist_git_subdirectory() -> Result<()> {
+ let context = TestContext::new("3.12");
+
+ let pyproject_toml = context.temp_dir.child("pyproject.toml");
+ pyproject_toml.write_str(
+ r#"
+ [project]
+ name = "project"
+ version = "0.1.0"
+ requires-python = ">=3.12"
+ dependencies = ["example-pkg-a @ git+https://github.com/pypa/sample-namespace-packages.git@df7530eeb8fa0cb7dbb8ecb28363e8e36bfa2f45#subdirectory=pkg_resources/pkg_a"]
+ "#,
+ )?;
+
+ deterministic! { context =>
+ uv_snapshot!(context.filters(), context.lock(), @r###"
+ success: true
+ exit_code: 0
+ ----- stdout -----
+
+ ----- stderr -----
+ warning: `uv lock` is experimental and may change without warning
+ Resolved 2 packages in [TIME]
+ "###);
+
+ let lock = fs_err::read_to_string(context.temp_dir.join("uv.lock")).unwrap();
+
+ insta::with_settings!({
+ filters => context.filters(),
+ }, {
+ assert_snapshot!(
+ lock, @r###"
+ version = 1
+ requires-python = ">=3.12"
+
+ [options]
+ exclude-newer = "2024-03-25 00:00:00 UTC"
+
+ [[package]]
+ name = "example-pkg-a"
+ version = "1"
+ source = { git = "https://github.com/pypa/sample-namespace-packages.git?subdirectory=pkg_resources%2Fpkg_a&rev=df7530eeb8fa0cb7dbb8ecb28363e8e36bfa2f45#df7530eeb8fa0cb7dbb8ecb28363e8e36bfa2f45" }
+
+ [[package]]
+ name = "project"
+ version = "0.1.0"
+ source = { editable = "." }
+ dependencies = [
+ { name = "example-pkg-a" },
+ ]
+ "###
+ );
+ });
+ }
+
+ // Re-run with `--locked`.
+ uv_snapshot!(context.filters(), context.lock().arg("--locked"), @r###"
+ success: true
+ exit_code: 0
+ ----- stdout -----
+
+ ----- stderr -----
+ warning: `uv lock` is experimental and may change without warning
+ Resolved 2 packages in [TIME]
+ "###);
+
+ // Install from the lockfile.
+ uv_snapshot!(context.filters(), context.sync().arg("--frozen"), @r###"
+ success: true
+ exit_code: 0
+ ----- stdout -----
+
+ ----- stderr -----
+ warning: `uv sync` is experimental and may change without warning
+ Prepared 2 packages in [TIME]
+ Installed 2 packages in [TIME]
+ + example-pkg-a==1 (from git+https://github.com/pypa/sample-namespace-packages.git@df7530eeb8fa0cb7dbb8ecb28363e8e36bfa2f45#subdirectory=pkg_resources/pkg_a)
+ + project==0.1.0 (from file://[TEMP_DIR]/)
+ "###);
+
+ Ok(())
+}
+
 /// Lock a Git requirement using PEP 508.
 #[test]
 #[cfg(feature = "git")]