Allow URL requirements in editable installs (#1614)

## Summary

If an editable package declares a direct URL requirement, we currently
error since it's not considered an "allowed" requirement. We need to add
those URLs to the allow-list.

Closes https://github.com/astral-sh/uv/issues/1603.

crates/uv-resolver/src/resolver/mod.rs

@@ -180,12 +180,17 @@ impl<'a, Provider: ResolverProvider> Resolver<'a, Provider> {
                     None
                 }
             })
-            .chain(
+            .chain(manifest.editables.iter().flat_map(|(editable, metadata)| {
-                manifest
+                std::iter::once(editable.raw()).chain(metadata.requires_dist.iter().filter_map(
-                    .editables
+                    |req| {
-                    .iter()
+                        if let Some(pep508_rs::VersionOrUrl::Url(url)) = &req.version_or_url {
-                    .map(|(editable, _)| editable.raw()),
+                            Some(url.raw())
-            )
+                        } else {
+                            None
+                        }
+                    },
+                ))
+            }))
             .collect();
 
         // Determine the allowed yanked package versions

crates/uv/tests/pip_compile.rs

@@ -2167,6 +2167,45 @@ fn compile_editable() -> Result<()> {
     Ok(())
 }
 
+/// Compile an editable package with a direct URL requirement.
+#[test]
+fn compile_editable_url_requirement() -> Result<()> {
+    let context = TestContext::new("3.12");
+    let requirements_in = context.temp_dir.child("requirements.in");
+    requirements_in.write_str("-e ../../scripts/editable-installs/hatchling_editable")?;
+
+    let filter_path = regex::escape(&requirements_in.normalized_display().to_string());
+    let filters: Vec<_> = [(filter_path.as_str(), "requirements.in")]
+        .into_iter()
+        .chain(INSTA_FILTERS.to_vec())
+        .collect();
+
+    uv_snapshot!(filters, Command::new(get_bin())
+            .arg("pip")
+            .arg("compile")
+            .arg(requirements_in.path())
+            .arg("--cache-dir")
+            .arg(context.cache_dir.path())
+            .arg("--exclude-newer")
+            .arg(EXCLUDE_NEWER)
+            .env("VIRTUAL_ENV", context.venv.as_os_str()), @r###"
+    success: true
+    exit_code: 0
+    ----- stdout -----
+    # This file was autogenerated by uv v[VERSION] via the following command:
+    #    uv pip compile requirements.in --cache-dir [CACHE_DIR] --exclude-newer 2023-11-18T12:00:00Z
+    -e ../../scripts/editable-installs/hatchling_editable
+    iniconfig @ https://files.pythonhosted.org/packages/ef/a6/62565a6e1cf69e10f5727360368e451d4b7f58beeac6173dc9db836a5b46/iniconfig-2.0.0-py3-none-any.whl
+        # via hatchling-editable
+
+    ----- stderr -----
+    Built 1 editable in [TIME]
+    Resolved 2 packages in [TIME]
+    "###);
+
+    Ok(())
+}
+
 #[test]
 #[ignore]
 fn cache_errors_are_non_fatal() -> Result<()> {

scripts/editable-installs/hatchling_editable/hatchling_editable/__init__.py

@@ -0,0 +1,2 @@
+def func():
+    pass

scripts/editable-installs/hatchling_editable/pyproject.toml

@@ -0,0 +1,22 @@
+[build-system]
+requires = ["hatchling"]
+build-backend = "hatchling.build"
+
+[project]
+name = "hatchling-editable"
+description = 'A simple editable package with a URL dependency.'
+readme = "README.md"
+requires-python = ">=3.7"
+license = "MIT"
+keywords = []
+authors = [
+  { name = "Astral Software Inc.", email = "hey@astral.sh" },
+]
+classifiers = []
+dependencies = [
+  "iniconfig @ https://files.pythonhosted.org/packages/ef/a6/62565a6e1cf69e10f5727360368e451d4b7f58beeac6173dc9db836a5b46/iniconfig-2.0.0-py3-none-any.whl"
+]
+version = "0.1.0"
+
+[tool.hatch.metadata]
+allow-direct-references = true

scripts/editable-installs/poetry_editable/pyproject.toml

@@ -2,7 +2,7 @@
 name = "poetry-editable"
 version = "0.1.0"
 description = ""
-authors = ["konstin <konstin@mailbox.org>"]
+authors = ["Astral Software Inc. <hey@astral.sh>"]
 
 [tool.poetry.dependencies]
 python = "^3.10"