Add --with-editable support to uv run (#6262)

Closes https://github.com/astral-sh/uv/issues/6254

crates/uv-cli/src/lib.rs

@@ -2140,6 +2140,14 @@ pub struct RunArgs {
     #[arg(long)]
     pub with: Vec<String>,
 
+    /// Run with the given packages installed as editables
+    ///
+    /// When used in a project, these dependencies will be layered on top of
+    /// the project environment in a separate, ephemeral environment. These
+    /// dependencies are allowed to conflict with those specified by the project.
+    #[arg(long)]
+    pub with_editable: Vec<String>,
+
     /// Run with all packages listed in the given `requirements.txt` files.
     ///
     /// The same environment semantics as `--with` apply.

crates/uv/src/commands/project/run.rs

@@ -554,7 +554,16 @@ pub(crate) async fn run(
                         eprint!("{report:?}");
                         return Ok(ExitStatus::Failure);
                     }
-                    Err(err) => return Err(err.into()),
+                    Err(ProjectError::Operation(operations::Error::Named(err))) => {
+                        let err = miette::Report::msg(format!("{err}"))
+                            .context("Invalid `--with` requirement");
+                        eprint!("{err:?}");
+                        return Ok(ExitStatus::Failure);
+                    }
+
+                    Err(err) => {
+                        return Err(err.into());
+                    }
                 };
 
                 environment.into()

crates/uv/src/lib.rs

@@ -1011,6 +1011,11 @@ async fn run_project(
                 .with
                 .into_iter()
                 .map(RequirementsSource::from_package)
+                .chain(
+                    args.with_editable
+                        .into_iter()
+                        .map(RequirementsSource::Editable),
+                )
                 .chain(
                     args.with_requirements
                         .into_iter()

crates/uv/src/settings.rs

@@ -193,6 +193,7 @@ pub(crate) struct RunSettings {
     pub(crate) dev: bool,
     pub(crate) command: ExternalCommand,
     pub(crate) with: Vec<String>,
+    pub(crate) with_editable: Vec<String>,
     pub(crate) with_requirements: Vec<PathBuf>,
     pub(crate) isolated: bool,
     pub(crate) show_resolution: bool,
@@ -215,6 +216,7 @@ impl RunSettings {
             no_dev,
             command,
             with,
+            with_editable,
             with_requirements,
             isolated,
             locked,
@@ -238,6 +240,7 @@ impl RunSettings {
             dev: flag(dev, no_dev).unwrap_or(true),
             command,
             with,
+            with_editable,
             with_requirements: with_requirements
                 .into_iter()
                 .filter_map(Maybe::into_option)

crates/uv/tests/run.rs

@@ -7,7 +7,7 @@ use indoc::indoc;
 
 use uv_python::PYTHON_VERSION_FILENAME;
 
-use common::{uv_snapshot, TestContext};
+use common::{copy_dir_all, uv_snapshot, TestContext};
 
 mod common;
 
@@ -538,6 +538,141 @@ fn run_with() -> Result<()> {
     Ok(())
 }
 
+#[test]
+fn run_with_editable() -> Result<()> {
+    let context = TestContext::new("3.12");
+
+    let anyio_local = context.temp_dir.child("src").child("anyio_local");
+    copy_dir_all(
+        context.workspace_root.join("scripts/packages/anyio_local"),
+        &anyio_local,
+    )?;
+
+    let black_editable = context.temp_dir.child("src").child("black_editable");
+    copy_dir_all(
+        context
+            .workspace_root
+            .join("scripts/packages/black_editable"),
+        &black_editable,
+    )?;
+
+    let pyproject_toml = context.temp_dir.child("pyproject.toml");
+    pyproject_toml.write_str(indoc! { r#"
+        [project]
+        name = "foo"
+        version = "1.0.0"
+        requires-python = ">=3.8"
+        dependencies = ["anyio", "sniffio==1.3.1"]
+        "#
+    })?;
+
+    let test_script = context.temp_dir.child("main.py");
+    test_script.write_str(indoc! { r"
+        import sniffio
+       "
+    })?;
+
+    // Requesting an editable requirement should install it in a layer.
+    uv_snapshot!(context.filters(), context.run().arg("--with-editable").arg("./src/black_editable").arg("main.py"), @r###"
+    success: true
+    exit_code: 0
+    ----- stdout -----
+
+    ----- stderr -----
+    Resolved 6 packages in [TIME]
+    Prepared 4 packages in [TIME]
+    Installed 4 packages in [TIME]
+     + anyio==4.3.0
+     + foo==1.0.0 (from file://[TEMP_DIR]/)
+     + idna==3.6
+     + sniffio==1.3.1
+    Resolved 1 package in [TIME]
+    Prepared 1 package in [TIME]
+    Installed 1 package in [TIME]
+     + black==0.1.0 (from file://[TEMP_DIR]/src/black_editable)
+    "###);
+
+    // Requesting an editable requirement should install it in a layer, even if it satisfied
+    uv_snapshot!(context.filters(), context.run().arg("--with-editable").arg("./src/anyio_local").arg("main.py"), @r###"
+    success: true
+    exit_code: 0
+    ----- stdout -----
+
+    ----- stderr -----
+    Resolved 6 packages in [TIME]
+    Audited 4 packages in [TIME]
+    Resolved 1 package in [TIME]
+    Prepared 1 package in [TIME]
+    Installed 1 package in [TIME]
+     + anyio==4.3.0+foo (from file://[TEMP_DIR]/src/anyio_local)
+    "###);
+
+    // Requesting the project itself should use the base environment.
+    uv_snapshot!(context.filters(), context.run().arg("--with-editable").arg(".").arg("main.py"), @r###"
+    success: true
+    exit_code: 0
+    ----- stdout -----
+
+    ----- stderr -----
+    Resolved 6 packages in [TIME]
+    Audited 4 packages in [TIME]
+    "###);
+
+    // Similarly, an already editable requirement does not require a layer
+    pyproject_toml.write_str(indoc! { r#"
+        [project]
+        name = "foo"
+        version = "1.0.0"
+        requires-python = ">=3.8"
+        dependencies = ["anyio", "sniffio==1.3.1"]
+
+        [tool.uv.sources]
+        anyio = { path = "./src/anyio_local", editable = true }
+        "#
+    })?;
+
+    uv_snapshot!(context.filters(), context.sync(), @r###"
+    success: true
+    exit_code: 0
+    ----- stdout -----
+
+    ----- stderr -----
+    Resolved 3 packages in [TIME]
+    Prepared 1 package in [TIME]
+    Uninstalled 3 packages in [TIME]
+    Installed 2 packages in [TIME]
+     - anyio==4.3.0
+     + anyio==4.3.0+foo (from file://[TEMP_DIR]/src/anyio_local)
+     ~ foo==1.0.0 (from file://[TEMP_DIR]/)
+     - idna==3.6
+    "###);
+
+    uv_snapshot!(context.filters(), context.run().arg("--with-editable").arg("./src/anyio_local").arg("main.py"), @r###"
+    success: true
+    exit_code: 0
+    ----- stdout -----
+
+    ----- stderr -----
+    Resolved 3 packages in [TIME]
+    Audited 3 packages in [TIME]
+    "###);
+
+    // If invalid, we should reference `--with-editable`.
+    uv_snapshot!(context.filters(), context.run().arg("--with").arg("./foo").arg("main.py"), @r###"
+    success: false
+    exit_code: 1
+    ----- stdout -----
+
+    ----- stderr -----
+    Resolved 3 packages in [TIME]
+    Audited 3 packages in [TIME]
+      × Invalid `--with` requirement
+      ╰─▶ Distribution not found at: file://[TEMP_DIR]/foo
+    "###);
+
+    Ok(())
+}
+
 #[test]
 fn run_locked() -> Result<()> {
     let context = TestContext::new("3.12");