Allow relative

crates/pypi-types/src/requirement.rs

@@ -507,7 +507,8 @@ impl RequirementSource {
                 ext,
                 url,
             } => Ok(Self::Path {
-                install_path: relative_to(&install_path, path)?,
+                install_path: relative_to(&install_path, path)
+                    .or_else(|_| std::path::absolute(install_path))?,
                 ext,
                 url,
             }),
@@ -516,7 +517,8 @@ impl RequirementSource {
                 editable,
                 url,
             } => Ok(Self::Directory {
-                install_path: relative_to(&install_path, path)?,
+                install_path: relative_to(&install_path, path)
+                    .or_else(|_| std::path::absolute(install_path))?,
                 editable,
                 url,
             }),

crates/uv-fs/src/path.rs

@@ -270,6 +270,9 @@ pub fn canonicalize_executable(path: impl AsRef<Path>) -> std::io::Result<PathBu
 /// `lib/python/site-packages/foo/__init__.py` and `lib/python/site-packages` -> `foo/__init__.py`
 /// `lib/marker.txt` and `lib/python/site-packages` -> `../../marker.txt`
 /// `bin/foo_launcher` and `lib/python/site-packages` -> `../../../bin/foo_launcher`
+///
+/// Returns `Err` if there is no relative path between `path` and `base` (for example, if the paths
+/// are on different drives on Windows).
 pub fn relative_to(
     path: impl AsRef<Path>,
     base: impl AsRef<Path>,

crates/uv-resolver/src/lock.rs

@@ -791,7 +791,9 @@ impl Lock {
                     IndexUrl::Pypi(_) | IndexUrl::Url(_) => None,
                     IndexUrl::Path(index_url) => {
                         let path = index_url.to_file_path().ok()?;
-                        let path = relative_to(&path, workspace.install_path()).ok()?;
+                        let path = relative_to(&path, workspace.install_path())
+                            .or_else(|_| std::path::absolute(path))
+                            .ok()?;
                         Some(path)
                     }
                 })
@@ -802,7 +804,9 @@ impl Lock {
                             FlatIndexLocation::Url(_) => None,
                             FlatIndexLocation::Path(index_url) => {
                                 let path = index_url.to_file_path().ok()?;
-                                let path = relative_to(&path, workspace.install_path()).ok()?;
+                                let path = relative_to(&path, workspace.install_path())
+                                    .or_else(|_| std::path::absolute(path))
+                                    .ok()?;
                                 Some(path)
                             }
                         }),
@@ -2026,14 +2030,15 @@ impl Source {
 
     fn from_path_built_dist(path_dist: &PathBuiltDist, root: &Path) -> Result<Source, LockError> {
         let path = relative_to(&path_dist.install_path, root)
+            .or_else(|_| std::path::absolute(&path_dist.install_path))
             .map_err(LockErrorKind::DistributionRelativePath)?;
         Ok(Source::Path(path))
     }
 
     fn from_path_source_dist(path_dist: &PathSourceDist, root: &Path) -> Result<Source, LockError> {
         let path = relative_to(&path_dist.install_path, root)
+            .or_else(|_| std::path::absolute(&path_dist.install_path))
             .map_err(LockErrorKind::DistributionRelativePath)?;
-
         Ok(Source::Path(path))
     }
 
@@ -2042,6 +2047,7 @@ impl Source {
         root: &Path,
     ) -> Result<Source, LockError> {
         let path = relative_to(&directory_dist.install_path, root)
+            .or_else(|_| std::path::absolute(&directory_dist.install_path))
             .map_err(LockErrorKind::DistributionRelativePath)?;
         if directory_dist.editable {
             Ok(Source::Editable(path))
@@ -2059,11 +2065,10 @@ impl Source {
                 Ok(Source::Registry(source))
             }
             IndexUrl::Path(url) => {
-                let path = relative_to(
-                    url.to_file_path().map_err(|()| LockErrorKind::UrlToPath)?,
-                    root,
-                )
-                .map_err(LockErrorKind::IndexRelativePath)?;
+                let path = url.to_file_path().map_err(|()| LockErrorKind::UrlToPath)?;
+                let path = relative_to(&path, root)
+                    .or_else(|_| std::path::absolute(&path))
+                    .map_err(LockErrorKind::IndexRelativePath)?;
                 let source = RegistrySource::Path(path);
                 Ok(Source::Registry(source))
             }
@@ -2520,7 +2525,8 @@ impl SourceDist {
                     .map_err(LockErrorKind::InvalidFileUrl)?
                     .to_file_path()
                     .map_err(|()| LockErrorKind::UrlToPath)?;
-                let path = relative_to(reg_dist_path, index_path)
+                let path = relative_to(&reg_dist_path, index_path)
+                    .or_else(|_| std::path::absolute(&reg_dist_path))
                     .map_err(LockErrorKind::DistributionRelativePath)?;
                 let hash = reg_dist.file.hashes.iter().max().cloned().map(Hash::from);
                 let size = reg_dist.file.size;
@@ -2798,7 +2804,8 @@ impl Wheel {
                     .map_err(LockErrorKind::InvalidFileUrl)?
                     .to_file_path()
                     .map_err(|()| LockErrorKind::UrlToPath)?;
-                let path = relative_to(wheel_path, index_path)
+                let path = relative_to(&wheel_path, index_path)
+                    .or_else(|_| std::path::absolute(&wheel_path))
                     .map_err(LockErrorKind::DistributionRelativePath)?;
                 Ok(Wheel {
                     url: WheelWireSource::Path { path },

crates/uv/tests/sync.rs

@@ -724,21 +724,21 @@ fn sync_relative_wheel() -> Result<()> {
             [[package]]
             name = "ok"
             version = "1.0.0"
-            source = { path = "wheels/ok-1.0.0-py3-none-any.whl" }
+            source = { path = "[TEMP_DIR]/wheels/ok-1.0.0-py3-none-any.whl" }
             wheels = [
                 { filename = "ok-1.0.0-py3-none-any.whl", hash = "sha256:79f0b33e6ce1e09eaa1784c8eee275dfe84d215d9c65c652f07c18e85fdaac5f" },
             ]
 
             [[package]]
             name = "relative-wheel"
             version = "0.1.0"
-            source = { editable = "." }
+            source = { editable = "[TEMP_DIR]/" }
             dependencies = [
                 { name = "ok" },
             ]
 
             [package.metadata]
-            requires-dist = [{ name = "ok", path = "wheels/ok-1.0.0-py3-none-any.whl" }]
+            requires-dist = [{ name = "ok", path = "[TEMP_DIR]/wheels/ok-1.0.0-py3-none-any.whl" }]
             "###
             );
         }