Respect tool.uv.environments for legacy virtual workspace roots (#7824

)

## Summary

Closes #7821.

crates/uv-workspace/src/workspace.rs

@@ -343,16 +343,8 @@ impl Workspace {
 
     /// Returns the set of overrides for the workspace.
     pub fn overrides(&self) -> Vec<Requirement> {
-        let Some(workspace_package) = self
-            .packages
-            .values()
-            .find(|workspace_package| workspace_package.root() == self.install_path())
-        else {
-            return vec![];
-        };
-
-        let Some(overrides) = workspace_package
-            .pyproject_toml()
+        let Some(overrides) = self
+            .pyproject_toml
             .tool
             .as_ref()
             .and_then(|tool| tool.uv.as_ref())
@@ -375,13 +367,7 @@ impl Workspace {
 
     /// Returns the set of supported environments for the workspace.
     pub fn environments(&self) -> Option<&SupportedEnvironments> {
-        let workspace_package = self
-            .packages
-            .values()
-            .find(|workspace_package| workspace_package.root() == self.install_path())?;
-
-        workspace_package
-            .pyproject_toml()
+        self.pyproject_toml
             .tool
             .as_ref()
             .and_then(|tool| tool.uv.as_ref())
@@ -390,16 +376,8 @@ impl Workspace {
 
     /// Returns the set of constraints for the workspace.
     pub fn constraints(&self) -> Vec<Requirement> {
-        let Some(workspace_package) = self
-            .packages
-            .values()
-            .find(|workspace_package| workspace_package.root() == self.install_path())
-        else {
-            return vec![];
-        };
-
-        let Some(constraints) = workspace_package
-            .pyproject_toml()
+        let Some(constraints) = self
+            .pyproject_toml
             .tool
             .as_ref()
             .and_then(|tool| tool.uv.as_ref())

crates/uv/tests/lock.rs

@@ -10927,6 +10927,170 @@ fn lock_constrained_environment() -> Result<()> {
     Ok(())
 }
 
+/// Lock with a user-provided constraint on the space of supported environments, using a legacy
+/// virtual workspace root.
+#[test]
+fn lock_constrained_environment_legacy() -> Result<()> {
+    let context = TestContext::new("3.12");
+
+    let pyproject_toml = context.temp_dir.child("pyproject.toml");
+    pyproject_toml.write_str(
+        r#"
+        [tool.uv.workspace]
+        members = ["child"]
+
+        [tool.uv]
+        environments = "platform_system != 'Windows'"
+        "#,
+    )?;
+
+    let child = context.temp_dir.child("child");
+    child.child("pyproject.toml").write_str(
+        r#"
+        [project]
+        name = "child"
+        version = "0.1.0"
+        requires-python = ">=3.12"
+        dependencies = ["black"]
+        "#,
+    )?;
+
+    uv_snapshot!(context.filters(), context.lock(), @r###"
+    success: true
+    exit_code: 0
+    ----- stdout -----
+
+    ----- stderr -----
+    Resolved 7 packages in [TIME]
+    "###);
+
+    let lock = fs_err::read_to_string(context.temp_dir.join("uv.lock")).unwrap();
+
+    // Because we're _not_ locking for Windows, `colorama` should not be included.
+    insta::with_settings!({
+        filters => context.filters(),
+    }, {
+        assert_snapshot!(
+            lock, @r###"
+        version = 1
+        requires-python = ">=3.12"
+        resolution-markers = [
+            "platform_system != 'Windows'",
+        ]
+        supported-markers = [
+            "platform_system != 'Windows'",
+        ]
+
+        [options]
+        exclude-newer = "2024-03-25T00:00:00Z"
+
+        [manifest]
+        members = [
+            "child",
+        ]
+
+        [[package]]
+        name = "black"
+        version = "24.3.0"
+        source = { registry = "https://pypi.org/simple" }
+        dependencies = [
+            { name = "click", marker = "platform_system != 'Windows'" },
+            { name = "mypy-extensions", marker = "platform_system != 'Windows'" },
+            { name = "packaging", marker = "platform_system != 'Windows'" },
+            { name = "pathspec", marker = "platform_system != 'Windows'" },
+            { name = "platformdirs", marker = "platform_system != 'Windows'" },
+        ]
+        sdist = { url = "https://files.pythonhosted.org/packages/8f/5f/bac24a952668c7482cfdb4ebf91ba57a796c9da8829363a772040c1a3312/black-24.3.0.tar.gz", hash = "sha256:a0c9c4a0771afc6919578cec71ce82a3e31e054904e7197deacbc9382671c41f", size = 634292 }
+        wheels = [
+            { url = "https://files.pythonhosted.org/packages/b6/c6/1d174efa9ff02b22d0124c73fc5f4d4fb006d0d9a081aadc354d05754a13/black-24.3.0-cp312-cp312-macosx_10_9_x86_64.whl", hash = "sha256:2818cf72dfd5d289e48f37ccfa08b460bf469e67fb7c4abb07edc2e9f16fb63f", size = 1600822 },
+            { url = "https://files.pythonhosted.org/packages/d9/ed/704731afffe460b8ff0672623b40fce9fe569f2ee617c15857e4d4440a3a/black-24.3.0-cp312-cp312-macosx_11_0_arm64.whl", hash = "sha256:4acf672def7eb1725f41f38bf6bf425c8237248bb0804faa3965c036f7672d11", size = 1429987 },
+            { url = "https://files.pythonhosted.org/packages/a8/05/8dd038e30caadab7120176d4bc109b7ca2f4457f12eef746b0560a583458/black-24.3.0-cp312-cp312-manylinux_2_17_x86_64.manylinux2014_x86_64.whl", hash = "sha256:c7ed6668cbbfcd231fa0dc1b137d3e40c04c7f786e626b405c62bcd5db5857e4", size = 1755319 },
+            { url = "https://files.pythonhosted.org/packages/4d/ea/31770a7e49f3eedfd8cd7b35e78b3a3aaad860400f8673994bc988318135/black-24.3.0-py3-none-any.whl", hash = "sha256:41622020d7120e01d377f74249e677039d20e6344ff5851de8a10f11f513bf93", size = 201493 },
+        ]
+
+        [[package]]
+        name = "child"
+        version = "0.1.0"
+        source = { virtual = "child" }
+        dependencies = [
+            { name = "black", marker = "platform_system != 'Windows'" },
+        ]
+
+        [package.metadata]
+        requires-dist = [{ name = "black" }]
+
+        [[package]]
+        name = "click"
+        version = "8.1.7"
+        source = { registry = "https://pypi.org/simple" }
+        sdist = { url = "https://files.pythonhosted.org/packages/96/d3/f04c7bfcf5c1862a2a5b845c6b2b360488cf47af55dfa79c98f6a6bf98b5/click-8.1.7.tar.gz", hash = "sha256:ca9853ad459e787e2192211578cc907e7594e294c7ccc834310722b41b9ca6de", size = 336121 }
+        wheels = [
+            { url = "https://files.pythonhosted.org/packages/00/2e/d53fa4befbf2cfa713304affc7ca780ce4fc1fd8710527771b58311a3229/click-8.1.7-py3-none-any.whl", hash = "sha256:ae74fb96c20a0277a1d615f1e4d73c8414f5a98db8b799a7931d1582f3390c28", size = 97941 },
+        ]
+
+        [[package]]
+        name = "mypy-extensions"
+        version = "1.0.0"
+        source = { registry = "https://pypi.org/simple" }
+        sdist = { url = "https://files.pythonhosted.org/packages/98/a4/1ab47638b92648243faf97a5aeb6ea83059cc3624972ab6b8d2316078d3f/mypy_extensions-1.0.0.tar.gz", hash = "sha256:75dbf8955dc00442a438fc4d0666508a9a97b6bd41aa2f0ffe9d2f2725af0782", size = 4433 }
+        wheels = [
+            { url = "https://files.pythonhosted.org/packages/2a/e2/5d3f6ada4297caebe1a2add3b126fe800c96f56dbe5d1988a2cbe0b267aa/mypy_extensions-1.0.0-py3-none-any.whl", hash = "sha256:4392f6c0eb8a5668a69e23d168ffa70f0be9ccfd32b5cc2d26a34ae5b844552d", size = 4695 },
+        ]
+
+        [[package]]
+        name = "packaging"
+        version = "24.0"
+        source = { registry = "https://pypi.org/simple" }
+        sdist = { url = "https://files.pythonhosted.org/packages/ee/b5/b43a27ac7472e1818c4bafd44430e69605baefe1f34440593e0332ec8b4d/packaging-24.0.tar.gz", hash = "sha256:eb82c5e3e56209074766e6885bb04b8c38a0c015d0a30036ebe7ece34c9989e9", size = 147882 }
+        wheels = [
+            { url = "https://files.pythonhosted.org/packages/49/df/1fceb2f8900f8639e278b056416d49134fb8d84c5942ffaa01ad34782422/packaging-24.0-py3-none-any.whl", hash = "sha256:2ddfb553fdf02fb784c234c7ba6ccc288296ceabec964ad2eae3777778130bc5", size = 53488 },
+        ]
+
+        [[package]]
+        name = "pathspec"
+        version = "0.12.1"
+        source = { registry = "https://pypi.org/simple" }
+        sdist = { url = "https://files.pythonhosted.org/packages/ca/bc/f35b8446f4531a7cb215605d100cd88b7ac6f44ab3fc94870c120ab3adbf/pathspec-0.12.1.tar.gz", hash = "sha256:a482d51503a1ab33b1c67a6c3813a26953dbdc71c31dacaef9a838c4e29f5712", size = 51043 }
+        wheels = [
+            { url = "https://files.pythonhosted.org/packages/cc/20/ff623b09d963f88bfde16306a54e12ee5ea43e9b597108672ff3a408aad6/pathspec-0.12.1-py3-none-any.whl", hash = "sha256:a0d503e138a4c123b27490a4f7beda6a01c6f288df0e4a8b79c7eb0dc7b4cc08", size = 31191 },
+        ]
+
+        [[package]]
+        name = "platformdirs"
+        version = "4.2.0"
+        source = { registry = "https://pypi.org/simple" }
+        sdist = { url = "https://files.pythonhosted.org/packages/96/dc/c1d911bf5bb0fdc58cc05010e9f3efe3b67970cef779ba7fbc3183b987a8/platformdirs-4.2.0.tar.gz", hash = "sha256:ef0cc731df711022c174543cb70a9b5bd22e5a9337c8624ef2c2ceb8ddad8768", size = 20055 }
+        wheels = [
+            { url = "https://files.pythonhosted.org/packages/55/72/4898c44ee9ea6f43396fbc23d9bfaf3d06e01b83698bdf2e4c919deceb7c/platformdirs-4.2.0-py3-none-any.whl", hash = "sha256:0614df2a2f37e1a662acbd8e2b25b92ccf8632929bc6d43467e17fe89c75e068", size = 17717 },
+        ]
+        "###
+        );
+    });
+
+    // Re-run with `--locked`.
+    uv_snapshot!(context.filters(), context.lock().arg("--locked"), @r###"
+    success: true
+    exit_code: 0
+    ----- stdout -----
+
+    ----- stderr -----
+    Resolved 7 packages in [TIME]
+    "###);
+
+    // Re-run with `--offline`. We shouldn't need a network connection to validate an
+    // already-correct lockfile with immutable metadata.
+    uv_snapshot!(context.filters(), context.lock().arg("--locked").arg("--offline").arg("--no-cache"), @r###"
+    success: true
+    exit_code: 0
+    ----- stdout -----
+
+    ----- stderr -----
+    Resolved 7 packages in [TIME]
+    "###);
+
+    Ok(())
+}
+
 /// User-provided constraints must be disjoint.
 #[test]
 fn lock_overlapping_environment() -> Result<()> {