Hint at --no-workspace in uv init failures

crates/uv-workspace/src/workspace.rs

@@ -158,7 +158,7 @@ impl Workspace {
                 workspace
             } else if pyproject_toml.project.is_none() {
                 // Without a project, it can't be an implicit root
-                return Err(WorkspaceError::MissingProject(project_path));
+                return Err(WorkspaceError::MissingProject(pyproject_path));
             } else if let Some(workspace) = find_workspace(&project_path, options).await? {
                 // We have found an explicit root above.
                 workspace
@@ -610,7 +610,7 @@ impl Workspace {
                 };
 
                 let pyproject_toml = PyProjectToml::from_string(contents)
-                    .map_err(|err| WorkspaceError::Toml(pyproject_path, Box::new(err)))?;
+                    .map_err(|err| WorkspaceError::Toml(pyproject_path.clone(), Box::new(err)))?;
 
                 // Check if the current project is explicitly marked as unmanaged.
                 if pyproject_toml
@@ -629,7 +629,7 @@ impl Workspace {
 
                 // Extract the package name.
                 let Some(project) = pyproject_toml.project.clone() else {
-                    return Err(WorkspaceError::MissingProject(member_root));
+                    return Err(WorkspaceError::MissingProject(pyproject_path));
                 };
 
                 debug!(
@@ -825,7 +825,7 @@ impl ProjectWorkspace {
         let project = pyproject_toml
             .project
             .clone()
-            .ok_or_else(|| WorkspaceError::MissingProject(pyproject_path.clone()))?;
+            .ok_or_else(|| WorkspaceError::MissingProject(pyproject_path))?;
 
         Self::from_project(project_root, &project, &pyproject_toml, options).await
     }

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

@@ -169,7 +169,10 @@ async fn init_project(
                     warn!("Ignoring workspace discovery error due to `--no-workspace`: {err}");
                     None
                 } else {
-                    return Err(err.into());
+                    return Err(anyhow::Error::from(err).context(format!(
+                        "Failed to discover parent workspace; use `{}` to ignore",
+                        "uv init --no-workspace".green()
+                    )));
                 }
             }
         }

crates/uv/tests/init.rs

@@ -1767,3 +1767,51 @@ fn init_hidden() {
     error: Not a valid package or extra name: ".foo". Names must start and end with a letter or digit and may only contain -, _, ., and alphanumeric characters.
     "###);
 }
+
+/// Run `uv init` with an invalid `pyproject.toml` in a parent directory.
+#[test]
+fn init_failure() -> Result<()> {
+    let context = TestContext::new("3.12");
+
+    // Create an empty `pyproject.toml`.
+    let pyproject_toml = context.temp_dir.child("pyproject.toml");
+    pyproject_toml.touch()?;
+
+    uv_snapshot!(context.filters(), context.init().arg("foo"), @r###"
+    success: false
+    exit_code: 2
+    ----- stdout -----
+
+    ----- stderr -----
+    error: Failed to discover parent workspace; use `uv init --no-workspace` to ignore
+      Caused by: No `project` table found in: `[TEMP_DIR]/pyproject.toml`
+    "###);
+
+    uv_snapshot!(context.filters(), context.init().arg("foo").arg("--no-workspace"), @r###"
+    success: true
+    exit_code: 0
+    ----- stdout -----
+
+    ----- stderr -----
+    Initialized project `foo` at `[TEMP_DIR]/foo`
+    "###);
+
+    let workspace = fs_err::read_to_string(context.temp_dir.join("foo").join("pyproject.toml"))?;
+    insta::with_settings!({
+        filters => context.filters(),
+    }, {
+        assert_snapshot!(
+            workspace, @r###"
+        [project]
+        name = "foo"
+        version = "0.1.0"
+        description = "Add your description here"
+        readme = "README.md"
+        requires-python = ">=3.12"
+        dependencies = []
+        "###
+        );
+    });
+
+    Ok(())
+}