fix: properly attribute the github-actions[bot] as a commit author

e2e/e2e.spec.ts

@@ -635,6 +635,54 @@ describe("e2e tests", () => {
 
     expect(messages[0].subject).toEqual(`Publish to BCR`);
   });
+
+  test("commits are properly attributed to the github-actions[bot] when it is the releaser", async () => {
+    const repo = Fixture.Versioned;
+    const tag = "v1.0.0";
+    await setupLocalRemoteRulesetRepo(repo, tag, {
+      login: "committer",
+      email: "committer@test.org",
+    });
+
+    fakeGitHub.mockUser({ login: "github-actions[bot]" });
+    fakeGitHub.mockRepository(testOrg, repo);
+    fakeGitHub.mockRepository(
+      testOrg,
+      "bazel-central-registry",
+      "bazelbuild",
+      "bazel-central-registry"
+    );
+    fakeGitHub.mockAppInstallation(testOrg, repo);
+    fakeGitHub.mockAppInstallation(testOrg, "bazel-central-registry");
+
+    const releaseArchive = await makeReleaseTarball(repo, "versioned-1.0.0");
+    await fakeGitHub.mockReleaseArchive(
+      `/${testOrg}/${repo}/archive/refs/tags/${tag}.tar.gz`,
+      releaseArchive
+    );
+
+    const response = await publishReleaseEvent(
+      cloudFunctions.getBaseUrl(),
+      secrets.webhookSecret,
+      {
+        owner: testOrg,
+        repo,
+        tag,
+        releaser: { login: "github-actions[bot]" },
+      }
+    );
+
+    expect(response.status).toEqual(200);
+
+    const git = getBcr();
+    const entryBranch = await getLatestBranch(git);
+    const logs = await git.log({ maxCount: 1, from: entryBranch });
+
+    expect(logs.latest?.author_email).toEqual(
+      "41898282+github-actions[bot]@users.noreply.github.com"
+    );
+    expect(logs.latest?.author_name).toEqual("github-actions[bot]");
+  });
 });
 
 const testReleaseArchives: string[] = [];

e2e/helpers/fixture.ts

@@ -31,7 +31,7 @@ export enum Fixture {
 export async function setupLocalRemoteRulesetRepo(
   fixture: Fixture,
   tag: string,
-  releaser: Partial<User>
+  commitAuthor: Partial<User>
 ): Promise<void> {
   const gitRepoPath = path.join(PREPARED_FIXTURES_PATH, fixture);
   let git: SimpleGit;
@@ -44,8 +44,8 @@ export async function setupLocalRemoteRulesetRepo(
     git = simpleGit(gitRepoPath);
     await git.init();
     await git.add("./*");
-    await git.addConfig("user.name", releaser.login!);
-    await git.addConfig("user.email", releaser.email!);
+    await git.addConfig("user.name", commitAuthor.login!);
+    await git.addConfig("user.email", commitAuthor.email!);
     await git.commit("first commit");
   } else {
     git = simpleGit(gitRepoPath);

e2e/stubs/fake-github.ts

@@ -202,7 +202,7 @@ export class FakeGitHub implements StubbedServer {
     const pattern = /\/users\/([^/]+)\/repos/;
     await this.server.forGet(pattern).thenCallback((request) => {
       const match = request.path.match(pattern);
-      const owner = match![1];
+      const owner = decodeURIComponent(match![1]);
 
       if (this.ownedRepos.has(owner)) {
         return {

src/infrastructure/github.ts

@@ -10,6 +10,18 @@ export class MissingRepositoryInstallationError extends Error {
 }
 
 export class GitHubClient {
+  // The GitHub API does not return a name or an email for the github-actions[bot].
+  // See https://api.github.com/users/github-actions%5Bbot%5D
+  // Yet, an email and a name are implicitly set when the bot is an author of a
+  // commit. Hardcode the (stable) name and email so that we can also author commits
+  // as the GitHub actions bot.
+  // See https://github.com/orgs/community/discussions/26560#discussioncomment-3252340.
+  public static readonly GITHUB_ACTIONS_BOT: User = {
+    username: "github-actions[bot]",
+    name: "github-actions[bot]",
+    email: "41898282+github-actions[bot]@users.noreply.github.com",
+  };
+
   // Cache installation tokens as they expire after an hour, which is more than
   // enough time for a cloud function to run.
   private readonly _installationTokenCache: any = {};
@@ -109,6 +121,9 @@ export class GitHubClient {
     username: string,
     repository: Repository
   ): Promise<User> {
+    if (username === GitHubClient.GITHUB_ACTIONS_BOT.username) {
+      return GitHubClient.GITHUB_ACTIONS_BOT;
+    }
     const octokit = await this.getRepoAuthorizedOctokit(repository);
     const { data } = await octokit.rest.users.getByUsername({ username });
     return { name: data.name, username, email: data.email };