Fix git fetch auth in generateGitPatch after clean_git_credentials.sh#20581
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Fix git fetch auth in generateGitPatch after clean_git_credentials.sh#20581
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…quest_branch and create_pull_request Co-authored-by: pelikhan <4175913+pelikhan@users.noreply.github.com>
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[WIP] Fix git fetch issue after clean_git_credentials.sh
Fix git fetch auth in generateGitPatch after clean_git_credentials.sh
Mar 11, 2026
pelikhan
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Mar 11, 2026
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Pull request overview
Fixes authenticated git fetch behavior in generateGitPatch when credentials have been stripped (e.g., by clean_git_credentials.sh), and propagates per-handler tokens so cross-repo PATs can be used.
Changes:
- Add
options.tokensupport togenerateGitPatchand use it when buildingGIT_CONFIG_*auth env for fetches (incremental + full mode). - Forward handler-level
github-tokenconfig throughsafe_outputs_handlersintogenerateGitPatch. - Add an integration test intended to cover
options.tokenbehavior and ensure auth headers aren’t persisted into.git/config.
Reviewed changes
Copilot reviewed 4 out of 4 changed files in this pull request and generated 1 comment.
| File | Description |
|---|---|
| actions/setup/js/generate_git_patch.cjs | Uses getGitAuthEnv(options.token) for authenticated fetches in both incremental and full modes. |
| actions/setup/js/safe_outputs_handlers.cjs | Passes per-handler github-token through to generateGitPatch via patchOptions.token. |
| actions/setup/js/git_patch_integration.test.cjs | Adds an integration test around options.token and on-disk credential non-persistence. |
| .changeset/patch-fix-git-fetch-auth-after-clean-credentials.md | Publishes a patch changeset describing the auth fix and token forwarding. |
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| try { | ||
| // Pass a custom token via options.token — the local git server ignores auth so the | ||
| // fetch still succeeds, but we verify no credentials are written to disk. | ||
| const result = await generateGitPatch("token-option-test", "main", { | ||
| mode: "incremental", | ||
| token: "ghs_custom_token_for_cross_repo", | ||
| }); | ||
|
|
||
| expect(result.success).toBe(true); | ||
|
|
||
| // Verify the extraheader was never written to git config (auth is passed via env vars only) | ||
| const configCheck = spawnSync("git", ["config", "--local", "--get", "http.https://github.example.com/.extraheader"], { cwd: workingRepo, encoding: "utf8" }); | ||
| // exit status 1 means the key does not exist — that is what we want | ||
| expect(configCheck.status).toBe(1); | ||
| } finally { |
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This test name/assertion claims to verify that options.token is used, but it never actually proves the override happened. Because the test repo uses a local file:// origin, the fetch succeeds regardless of auth, and the only assertion checks that .extraheader was not written to disk (which is already covered by the earlier tests). Consider asserting token usage by mocking/spying on getGitAuthEnv or execGitSync (e.g., via vi.resetModules() + vi.doMock('./git_helpers.cjs', ...)) and verifying the fetch call receives an env built from the provided token (and not the GITHUB_TOKEN).
Suggested change
| try { | |
| // Pass a custom token via options.token — the local git server ignores auth so the | |
| // fetch still succeeds, but we verify no credentials are written to disk. | |
| const result = await generateGitPatch("token-option-test", "main", { | |
| mode: "incremental", | |
| token: "ghs_custom_token_for_cross_repo", | |
| }); | |
| expect(result.success).toBe(true); | |
| // Verify the extraheader was never written to git config (auth is passed via env vars only) | |
| const configCheck = spawnSync("git", ["config", "--local", "--get", "http.https://github.example.com/.extraheader"], { cwd: workingRepo, encoding: "utf8" }); | |
| // exit status 1 means the key does not exist — that is what we want | |
| expect(configCheck.status).toBe(1); | |
| } finally { | |
| const originalGithubToken = process.env.GITHUB_TOKEN; | |
| process.env.GITHUB_TOKEN = "default_env_token"; | |
| // Capture environments passed to execGitSync (from git_helpers.cjs) | |
| const execGitEnvs = []; | |
| // Re-load modules with a mocked git_helpers.cjs that wraps execGitSync | |
| vi.resetModules(); | |
| await vi.doMock("./git_helpers.cjs", async () => { | |
| const actual = await vi.importActual("./git_helpers.cjs"); | |
| return { | |
| ...actual, | |
| execGitSync: (...args) => { | |
| const [gitArgs, options] = args; | |
| if (options && options.env) { | |
| execGitEnvs.push({ args: gitArgs, env: options.env }); | |
| } | |
| return actual.execGitSync(...args); | |
| }, | |
| }; | |
| }); | |
| const { generateGitPatch: generateGitPatchWithSpy } = await import("./generate_git_patch.cjs"); | |
| try { | |
| // Pass a custom token via options.token — the local git server ignores auth so the | |
| // fetch still succeeds, but we now also verify the env passed to git. | |
| const result = await generateGitPatchWithSpy("token-option-test", "main", { | |
| mode: "incremental", | |
| token: "ghs_custom_token_for_cross_repo", | |
| }); | |
| expect(result.success).toBe(true); | |
| // Verify that git fetch (or any git command using auth env) received the custom token | |
| const fetchEnvEntries = execGitEnvs.filter( | |
| entry => Array.isArray(entry.args) && entry.args[0] === "fetch" | |
| ); | |
| expect(fetchEnvEntries.length).toBeGreaterThan(0); | |
| for (const entry of fetchEnvEntries) { | |
| expect(entry.env).toBeDefined(); | |
| expect(entry.env.GITHUB_TOKEN).toBe("ghs_custom_token_for_cross_repo"); | |
| expect(entry.env.GITHUB_TOKEN).not.toBe("default_env_token"); | |
| } | |
| // Verify the extraheader was never written to git config (auth is passed via env vars only) | |
| const configCheck = spawnSync("git", ["config", "--local", "--get", "http.https://github.example.com/.extraheader"], { | |
| cwd: workingRepo, | |
| encoding: "utf8", | |
| }); | |
| // exit status 1 means the key does not exist — that is what we want | |
| expect(configCheck.status).toBe(1); | |
| } finally { | |
| process.env.GITHUB_TOKEN = originalGithubToken; |
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push_to_pull_request_branchandcreate_pull_requestfail withfatal: could not read Usernamebecauseclean_git_credentials.shstrips git credentials before the agent runs, andgenerateGitPatchwas fetching without auth.Changes
generate_git_patch.cjsoptions.tokenparameter — allows callers to pass a custom PAT (cross-repo scenarios), falling back toGITHUB_TOKENgetGitAuthEnv()(no-arg); updated togetGitAuthEnv(options.token)to respect custom tokensgetGitAuthEnv(options.token)viafullFetchEnvsafe_outputs_handlers.cjspushToPullRequestBranchHandlerandcreatePullRequestHandlernow forwardpushConfig["github-token"]/prConfig["github-token"]asoptions.tokentogenerateGitPatchgit_patch_integration.test.cjsoptions.tokenis used in incremental mode without leaking credentials into.git/configWarning
Firewall rules blocked me from connecting to one or more addresses (expand for details)
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