fix(raycast): reject unsafe base refs

src/raycast/local-repo-analyzer.ts

@@ -76,7 +76,8 @@ export function collectRaycastLocalRepoMetadata(input: {
     throw new Error("Raycast branch analysis supports metadata-only mode; source upload mode is rejected.");
   }
   const git = input.git ?? gitLines;
-  const baseRef = input.baseRef ?? git(input.cwd, ["symbolic-ref", "--short", "refs/remotes/origin/HEAD"])[0]?.replace(/^origin\//, "") ?? "main";
+  const rawBaseRef = input.baseRef ?? git(input.cwd, ["symbolic-ref", "--short", "refs/remotes/origin/HEAD"])[0]?.replace(/^origin\//, "") ?? "main";
+  const baseRef = validateSafeBaseRef(rawBaseRef);
   const remoteUrl = git(input.cwd, ["config", "--get", "remote.origin.url"])[0] ?? "";
   const repoFullName = input.repoFullName ?? parseGitHubRemote(remoteUrl);
   if (!repoFullName) throw new Error("Could not infer repoFullName from the git remote; pass repoFullName explicitly.");
@@ -200,6 +201,13 @@ async function postJson(
   return payload;
 }
 
+function validateSafeBaseRef(baseRef: string): string {
+  if (!baseRef || baseRef.startsWith("-")) {
+    throw new Error("Unsafe git baseRef; pass a branch or ref name that does not begin with '-'.");
+  }
+  return baseRef;
+}
+
 function collectChangedFiles(cwd: string, baseRef: string, git: RaycastGitRunner): RaycastChangedFileMetadata[] {
   const numstat = new Map(parseNumstat(cwd, baseRef, git).map((entry) => [entry.path, entry]));
   return git(cwd, ["diff", "--name-status", "-M", baseRef, "--"]).map((row) => {

test/unit/raycast-local-repo-analyzer.test.ts

@@ -111,6 +111,37 @@ describe("Raycast local repo analyzer", () => {
     expect(calls.map((call) => call.split(" ")[0]).join("\n")).not.toMatch(/^(cat|show|grep|archive)$/m);
   });
 
+  it("rejects inferred base refs that could be parsed as git options", () => {
+    const { git, calls } = fakeGit({
+      "symbolic-ref --short refs/remotes/origin/HEAD": "origin/--output=/tmp/gittensory-owned\n",
+    });
+
+    expect(() =>
+      collectRaycastLocalRepoMetadata({
+        cwd: "/tmp/private-checkout",
+        login: "jsonbored",
+        repoFullName: "JSONbored/gittensory",
+        git,
+      }),
+    ).toThrow(/unsafe git baseRef/i);
+    expect(calls).toEqual(["symbolic-ref --short refs/remotes/origin/HEAD"]);
+  });
+
+  it("rejects explicit base refs that could be parsed as git options", () => {
+    const git = vi.fn<RaycastGitRunner>();
+
+    expect(() =>
+      collectRaycastLocalRepoMetadata({
+        cwd: "/tmp/private-checkout",
+        login: "jsonbored",
+        repoFullName: "JSONbored/gittensory",
+        baseRef: "--output=/tmp/gittensory-owned",
+        git,
+      }),
+    ).toThrow(/unsafe git baseRef/i);
+    expect(git).not.toHaveBeenCalled();
+  });
+
   it("rejects source upload mode before running git", () => {
     const git = vi.fn<RaycastGitRunner>();