Avoid validating workspace members when --no-sources is provided (#…

…7599)

## Summary

Closes #7572.

crates/uv-distribution/src/metadata/requires_dist.rs

@@ -1,8 +1,8 @@
-use std::collections::BTreeMap;
-use std::path::Path;
-
 use crate::metadata::{LoweredRequirement, MetadataError};
 use crate::Metadata;
+use pypi_types::Requirement;
+use std::collections::BTreeMap;
+use std::path::Path;
 use uv_configuration::SourceStrategy;
 use uv_normalize::{ExtraName, GroupName, PackageName, DEV_DEPENDENCIES};
 use uv_workspace::pyproject::ToolUvSources;
@@ -54,11 +54,11 @@ impl RequiresDist {
     fn from_project_workspace(
         metadata: pypi_types::RequiresDist,
         project_workspace: &ProjectWorkspace,
-        sources: SourceStrategy,
+        source_strategy: SourceStrategy,
     ) -> Result<Self, MetadataError> {
         // Collect any `tool.uv.sources` and `tool.uv.dev_dependencies` from `pyproject.toml`.
         let empty = BTreeMap::default();
-        let sources = match sources {
+        let sources = match source_strategy {
             SourceStrategy::Enabled => project_workspace
                 .current_project()
                 .pyproject_toml()
@@ -81,7 +81,37 @@ impl RequiresDist {
                 .and_then(|uv| uv.dev_dependencies.as_ref())
                 .into_iter()
                 .flatten()
-                .cloned()
+                .cloned();
+            let dev_dependencies = match source_strategy {
+                SourceStrategy::Enabled => dev_dependencies
+                    .map(|requirement| {
+                        let requirement_name = requirement.name.clone();
+                        LoweredRequirement::from_requirement(
+                            requirement,
+                            &metadata.name,
+                            project_workspace.project_root(),
+                            sources,
+                            project_workspace.workspace(),
+                        )
+                        .map(LoweredRequirement::into_inner)
+                        .map_err(|err| MetadataError::LoweringError(requirement_name.clone(), err))
+                    })
+                    .collect::<Result<Vec<_>, _>>()?,
+                SourceStrategy::Disabled => dev_dependencies
+                    .into_iter()
+                    .map(Requirement::from)
+                    .collect(),
+            };
+            if dev_dependencies.is_empty() {
+                BTreeMap::default()
+            } else {
+                BTreeMap::from([(DEV_DEPENDENCIES.clone(), dev_dependencies)])
+            }
+        };
+
+        let requires_dist = metadata.requires_dist.into_iter();
+        let requires_dist = match source_strategy {
+            SourceStrategy::Enabled => requires_dist
                 .map(|requirement| {
                     let requirement_name = requirement.name.clone();
                     LoweredRequirement::from_requirement(
@@ -94,31 +124,10 @@ impl RequiresDist {
                     .map(LoweredRequirement::into_inner)
                     .map_err(|err| MetadataError::LoweringError(requirement_name.clone(), err))
                 })
-                .collect::<Result<Vec<_>, _>>()?;
-            if dev_dependencies.is_empty() {
-                BTreeMap::default()
-            } else {
-                BTreeMap::from([(DEV_DEPENDENCIES.clone(), dev_dependencies)])
-            }
+                .collect::<Result<_, _>>()?,
+            SourceStrategy::Disabled => requires_dist.into_iter().map(Requirement::from).collect(),
         };
 
-        let requires_dist = metadata
-            .requires_dist
-            .into_iter()
-            .map(|requirement| {
-                let requirement_name = requirement.name.clone();
-                LoweredRequirement::from_requirement(
-                    requirement,
-                    &metadata.name,
-                    project_workspace.project_root(),
-                    sources,
-                    project_workspace.workspace(),
-                )
-                .map(LoweredRequirement::into_inner)
-                .map_err(|err| MetadataError::LoweringError(requirement_name.clone(), err))
-            })
-            .collect::<Result<_, _>>()?;
-
         Ok(Self {
             name: metadata.name,
             requires_dist,

crates/uv/tests/sync.rs

@@ -2752,3 +2752,54 @@ fn sync_invalid_environment() -> Result<()> {
 
     Ok(())
 }
+
+/// Avoid validating workspace members when `--no-sources` is provided. Rather than reporting that
+/// `./anyio` is missing, install `anyio` from the registry.
+#[test]
+fn sync_no_sources_missing_member() -> Result<()> {
+    let context = TestContext::new("3.12");
+
+    let pyproject_toml = context.temp_dir.child("pyproject.toml");
+    pyproject_toml.write_str(
+        r#"
+        [project]
+        name = "root"
+        version = "0.1.0"
+        requires-python = ">=3.12"
+        dependencies = ["anyio"]
+
+        [build-system]
+        requires = ["setuptools>=42"]
+        build-backend = "setuptools.build_meta"
+
+        [tool.uv.sources]
+        anyio = { workspace = true }
+
+        [tool.uv.workspace]
+        members = ["anyio"]
+        "#,
+    )?;
+
+    let src = context.temp_dir.child("src").child("albatross");
+    src.create_dir_all()?;
+
+    let init = src.child("__init__.py");
+    init.touch()?;
+
+    uv_snapshot!(context.filters(), context.sync().arg("--no-sources"), @r###"
+    success: true
+    exit_code: 0
+    ----- stdout -----
+
+    ----- stderr -----
+    Resolved 4 packages in [TIME]
+    Prepared 4 packages in [TIME]
+    Installed 4 packages in [TIME]
+     + anyio==4.3.0
+     + idna==3.6
+     + root==0.1.0 (from file://[TEMP_DIR]/)
+     + sniffio==1.3.1
+    "###);
+
+    Ok(())
+}