Resolve requirements-file find-links relative to the file

crates/uv-requirements-txt/src/lib.rs

@@ -364,7 +364,13 @@ impl RequirementsTxt {
         let mut s = Scanner::new(content);
 
         let mut data = Self::default();
-        while let Some(statement) = parse_entry(&mut s, content, working_dir, requirements_txt)? {
+        while let Some(statement) = parse_entry(
+            &mut s,
+            content,
+            working_dir,
+            requirements_dir,
+            requirements_txt,
+        )? {
             match statement {
                 RequirementsTxtStatement::Requirements {
                     filename,
@@ -682,6 +688,7 @@ fn parse_entry(
     s: &mut Scanner,
     content: &str,
     working_dir: &Path,
+    requirements_dir: &Path,
     requirements_txt: &Path,
 ) -> Result<Option<RequirementsTxtStatement>, RequirementsTxtParserError> {
     // Eat all preceding whitespace, this may run us to the end of file
@@ -826,7 +833,7 @@ fn parse_entry(
             .map(Cow::Owned)
             .unwrap_or(Cow::Borrowed(given));
         let expanded = expand_env_vars(given.as_ref());
-        let url = if let Some(path) = std::path::absolute(expanded.as_ref())
+        let url = if let Some(path) = std::path::absolute(requirements_dir.join(expanded.as_ref()))
             .ok()
             .filter(|path| path.exists())
         {

crates/uv/tests/pip_install/pip_install.rs

@@ -7511,6 +7511,38 @@ fn find_links_local_html() -> Result<()> {
     Ok(())
 }
 
+/// Install from a `--find-links` directory relative to the containing requirements file.
+#[test]
+fn find_links_relative_to_requirements_file() -> Result<()> {
+    let context = uv_test::test_context!("3.12");
+    let requirements_dir = context.temp_dir.child("requirements");
+    let links_dir = requirements_dir.child("links");
+    links_dir.create_dir_all()?;
+    fs::copy(
+        context
+            .workspace_root
+            .join("test/links/ok-1.0.0-py3-none-any.whl"),
+        links_dir.child("ok-1.0.0-py3-none-any.whl").path(),
+    )?;
+    requirements_dir
+        .child("requirements.txt")
+        .write_str("--no-index\n--find-links ./links\nok==1.0.0\n")?;
+
+    uv_snapshot!(context.filters(), context.pip_install()
+        .arg("-r")
+        .arg("requirements/requirements.txt"), @"
+    exit_code: 0 (success)
+    ----- stderr -----
+    Resolved 1 package in [TIME]
+    Prepared 1 package in [TIME]
+    Installed 1 package in [TIME]
+     + ok==1.0.0
+    "
+    );
+
+    Ok(())
+}
+
 /// Install the latest version across multiple `--find-links` directories.
 #[test]
 fn find_links_multiple() -> Result<()> {