Treat path sources as package = true by default

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

@@ -16,7 +16,7 @@ use uv_pep508::{MarkerTree, VerbatimUrl, VersionOrUrl, looks_like_git_repository
 use uv_pypi_types::{ConflictItem, ParsedUrlError, VerbatimParsedUrl};
 use uv_redacted::DisplaySafeUrl;
 use uv_workspace::Workspace;
-use uv_workspace::pyproject::{PyProjectToml, Source, Sources};
+use uv_workspace::pyproject::{Source, Sources};
 
 use crate::metadata::GitWorkspaceMember;
 
@@ -723,14 +723,8 @@ fn path_source(
             })
         } else {
             // Determine whether the project is a package or virtual.
-            let is_package = package.unwrap_or_else(|| {
+            // Default to `package = true` for path sources.
-                let pyproject_path = install_path.join("pyproject.toml");
+            let is_package = package.unwrap_or(true);
-                fs_err::read_to_string(&pyproject_path)
-                    .ok()
-                    .and_then(|contents| PyProjectToml::from_string(contents).ok())
-                    .map(|pyproject_toml| pyproject_toml.is_package())
-                    .unwrap_or(true)
-            });
 
             Ok(RequirementSource::Directory {
                 install_path: install_path.into_boxed_path(),

crates/uv/tests/it/lock.rs

@@ -7139,12 +7139,12 @@ fn lock_exclusion() -> Result<()> {
         ]
 
         [package.metadata]
-        requires-dist = [{ name = "project", virtual = "../" }]
+        requires-dist = [{ name = "project", directory = "../" }]
 
         [[package]]
         name = "project"
         version = "0.1.0"
-        source = { virtual = "../" }
+        source = { directory = "../" }
         "#
         );
     });
@@ -7727,7 +7727,7 @@ fn lock_dev_transitive() -> Result<()> {
         [package.metadata]
         requires-dist = [
             { name = "baz", editable = "baz" },
-            { name = "foo", virtual = "../foo" },
+            { name = "foo", directory = "../foo" },
             { name = "iniconfig", specifier = ">1" },
         ]
 
@@ -7749,7 +7749,7 @@ fn lock_dev_transitive() -> Result<()> {
         [[package]]
         name = "foo"
         version = "0.1.0"
-        source = { virtual = "../foo" }
+        source = { directory = "../foo" }
 
         [package.metadata]
 
@@ -13566,7 +13566,7 @@ fn lock_narrowed_python_version_upper() -> Result<()> {
         [[package]]
         name = "dependency"
         version = "0.1.0"
-        source = { virtual = "dependency" }
+        source = { directory = "dependency" }
         dependencies = [
             { name = "iniconfig", marker = "python_full_version >= '3.10'" },
         ]
@@ -13592,7 +13592,7 @@ fn lock_narrowed_python_version_upper() -> Result<()> {
         ]
 
         [package.metadata]
-        requires-dist = [{ name = "dependency", marker = "python_full_version >= '3.10'", virtual = "dependency" }]
+        requires-dist = [{ name = "dependency", marker = "python_full_version >= '3.10'", directory = "dependency" }]
         "#
         );
     });
@@ -16870,9 +16870,9 @@ fn lock_explicit_virtual_project() -> Result<()> {
     Ok(())
 }
 
-/// Lock a project that is implicitly virtual (by way of omitting `build-system`).
+/// Lock a project with a dev dependency
 #[test]
-fn lock_implicit_virtual_project() -> Result<()> {
+fn lock_project_dev_dependency() -> Result<()> {
     let context = TestContext::new("3.12");
 
     let pyproject_toml = context.temp_dir.child("pyproject.toml");
@@ -17088,10 +17088,9 @@ fn lock_implicit_virtual_project() -> Result<()> {
     Ok(())
 }
 
-/// Lock a project that has a path dependency that is implicitly virtual (by way of omitting
+/// Lock a project that has a path dependency
-/// `build-system`).
 #[test]
-fn lock_implicit_virtual_path() -> Result<()> {
+fn lock_path_dependency() -> Result<()> {
     let context = TestContext::new("3.12");
 
     let pyproject_toml = context.temp_dir.child("pyproject.toml");
@@ -17158,7 +17157,7 @@ fn lock_implicit_virtual_path() -> Result<()> {
         [[package]]
         name = "child"
         version = "0.1.0"
-        source = { virtual = "child" }
+        source = { directory = "child" }
         dependencies = [
             { name = "iniconfig" },
         ]
@@ -17196,7 +17195,7 @@ fn lock_implicit_virtual_path() -> Result<()> {
         [package.metadata]
         requires-dist = [
             { name = "anyio", specifier = ">3" },
-            { name = "child", virtual = "child" },
+            { name = "child", directory = "child" },
         ]
 
         [[package]]
@@ -17233,19 +17232,20 @@ fn lock_implicit_virtual_path() -> Result<()> {
     "###);
 
     // Install from the lockfile. The virtual project should _not_ be installed.
-    uv_snapshot!(context.filters(), context.sync().arg("--frozen"), @r###"
+    uv_snapshot!(context.filters(), context.sync().arg("--frozen"), @r"
     success: true
     exit_code: 0
     ----- stdout -----
 
     ----- stderr -----
-    Prepared 4 packages in [TIME]
+    Prepared 5 packages in [TIME]
-    Installed 4 packages in [TIME]
+    Installed 5 packages in [TIME]
      + anyio==4.3.0
+     + child==0.1.0 (from file://[TEMP_DIR]/child)
      + idna==3.6
      + iniconfig==2.0.0
      + sniffio==1.3.1
-    "###);
+    ");
 
     Ok(())
 }

crates/uv/tests/it/sync.rs

@@ -5399,7 +5399,8 @@ fn sync_override_package() -> Result<()> {
         .child("__init__.py")
         .touch()?;
 
-    // Create a package that depends on it.
+    // Create a package that depends on it. Mark the source with
+    // `package = false`.
     let pyproject_toml = context.temp_dir.child("pyproject.toml");
     pyproject_toml.write_str(
         r#"
@@ -5414,7 +5415,7 @@ fn sync_override_package() -> Result<()> {
         build-backend = "hatchling.build"
 
         [tool.uv.sources]
-        core = { path = "./core" }
+        core = { path = "./core", package = false }
         "#,
     )?;
 
@@ -5438,7 +5439,7 @@ fn sync_override_package() -> Result<()> {
      + project==0.0.0 (from file://[TEMP_DIR]/)
     "###);
 
-    // Mark the source as `package = true`.
+    // Remove `package = false` from the source.
     let pyproject_toml = context.temp_dir.child("pyproject.toml");
     pyproject_toml.write_str(
         r#"
@@ -5453,7 +5454,7 @@ fn sync_override_package() -> Result<()> {
         build-backend = "hatchling.build"
 
         [tool.uv.sources]
-        core = { path = "./core", package = true }
+        core = { path = "./core" }
         "#,
     )?;
 
@@ -5472,69 +5473,6 @@ fn sync_override_package() -> Result<()> {
      ~ project==0.0.0 (from file://[TEMP_DIR]/)
     "###);
 
-    // Remove `package = false`.
-    let pyproject_toml = context.temp_dir.child("core").child("pyproject.toml");
-    pyproject_toml.write_str(
-        r#"
-        [project]
-        name = "core"
-        version = "0.1.0"
-        requires-python = ">=3.12"
-
-        [build-system]
-        requires = ["hatchling"]
-        build-backend = "hatchling.build"
-        "#,
-    )?;
-
-    // Syncing the project _should_ install `core`.
-    uv_snapshot!(context.filters(), context.sync(), @r###"
-    success: true
-    exit_code: 0
-    ----- stdout -----
-
-    ----- stderr -----
-    Resolved 2 packages in [TIME]
-    Prepared 1 package in [TIME]
-    Uninstalled 1 package in [TIME]
-    Installed 1 package in [TIME]
-     ~ core==0.1.0 (from file://[TEMP_DIR]/core)
-    "###);
-
-    // Mark the source as `package = false`.
-    let pyproject_toml = context.temp_dir.child("pyproject.toml");
-    pyproject_toml.write_str(
-        r#"
-        [project]
-        name = "project"
-        version = "0.0.0"
-        requires-python = ">=3.12"
-        dependencies = ["core"]
-
-        [build-system]
-        requires = ["hatchling"]
-        build-backend = "hatchling.build"
-
-        [tool.uv.sources]
-        core = { path = "./core", package = false }
-        "#,
-    )?;
-
-    // Syncing the project should _not_ install `core`.
-    uv_snapshot!(context.filters(), context.sync(), @r###"
-    success: true
-    exit_code: 0
-    ----- stdout -----
-
-    ----- stderr -----
-    Resolved 2 packages in [TIME]
-    Prepared 1 package in [TIME]
-    Uninstalled 2 packages in [TIME]
-    Installed 1 package in [TIME]
-     - core==0.1.0 (from file://[TEMP_DIR]/core)
-     ~ project==0.0.0 (from file://[TEMP_DIR]/)
-    "###);
-
     Ok(())
 }