Detect basic wildcard imports in ruff analyze graph

crates/ruff/tests/analyze_graph.rs

@@ -305,3 +305,65 @@ fn exclude() -> Result<()> {
 
     Ok(())
 }
+
+#[test]
+fn wildcard() -> Result<()> {
+    let tempdir = TempDir::new()?;
+    let root = ChildPath::new(tempdir.path());
+
+    root.child("ruff").child("__init__.py").write_str("")?;
+    root.child("ruff")
+        .child("a.py")
+        .write_str(indoc::indoc! {r#"
+        from ruff.b import *
+    "#})?;
+    root.child("ruff")
+        .child("b.py")
+        .write_str(indoc::indoc! {r#"
+        from ruff import c
+    "#})?;
+    root.child("ruff")
+        .child("c.py")
+        .write_str(indoc::indoc! {r#"
+        from ruff.utils import *
+    "#})?;
+
+    root.child("ruff")
+        .child("utils")
+        .child("__init__.py")
+        .write_str("from .helpers import *")?;
+    root.child("ruff")
+        .child("utils")
+        .child("helpers.py")
+        .write_str("")?;
+
+    insta::with_settings!({
+        filters => INSTA_FILTERS.to_vec(),
+    }, {
+        assert_cmd_snapshot!(command().current_dir(&root), @r###"
+        success: true
+        exit_code: 0
+        ----- stdout -----
+        {
+          "ruff/__init__.py": [],
+          "ruff/a.py": [
+            "ruff/b.py"
+          ],
+          "ruff/b.py": [
+            "ruff/c.py"
+          ],
+          "ruff/c.py": [
+            "ruff/utils/__init__.py"
+          ],
+          "ruff/utils/__init__.py": [
+            "ruff/utils/helpers.py"
+          ],
+          "ruff/utils/helpers.py": []
+        }
+
+        ----- stderr -----
+        "###);
+    });
+
+    Ok(())
+}

crates/ruff_graph/src/collector.rs

@@ -90,8 +90,10 @@ impl<'ast> SourceOrderVisitor<'ast> for Collector<'_> {
                         components.extend(module.split('.'));
                     }
 
-                    // Add the alias name.
-                    components.push(alias.name.as_str());
+                    // Add the alias name, unless it's a wildcard import.
+                    if alias.name.as_str() != "*" {
+                        components.push(alias.name.as_str());
+                    }
 
                     if let Some(module_name) = ModuleName::from_components(components) {
                         self.imports.push(CollectedImport::ImportFrom(module_name));