From a9f87691e2faed5fd41fa3dbf5c591643279c671 Mon Sep 17 00:00:00 2001 From: kostua16 Date: Sun, 28 Jun 2026 21:17:17 +0500 Subject: [PATCH] feat: add setup git credentials action --- .github/workflows/publish-action.yml | 27 + .github/workflows/test-action.yml | 55 ++ .gitignore | 4 + LICENSE | 21 + README.md | 73 +++ action.yml | 22 + package-lock.json | 934 +++++++++++++++++++++++++++ package.json | 18 + src/main.ts | 230 +++++++ tsconfig.json | 21 + vite.config.ts | 15 + 11 files changed, 1420 insertions(+) create mode 100644 .github/workflows/publish-action.yml create mode 100644 .github/workflows/test-action.yml create mode 100644 .gitignore create mode 100644 LICENSE create mode 100644 README.md create mode 100644 action.yml create mode 100644 package-lock.json create mode 100644 package.json create mode 100644 src/main.ts create mode 100644 tsconfig.json create mode 100644 vite.config.ts diff --git a/.github/workflows/publish-action.yml b/.github/workflows/publish-action.yml new file mode 100644 index 0000000..ef095a9 --- /dev/null +++ b/.github/workflows/publish-action.yml @@ -0,0 +1,27 @@ +name: publish-action +on: + release: + types: released +concurrency: ${{ github.workflow }} +jobs: + publish-action: + permissions: + contents: write + runs-on: ubuntu-latest + steps: + - uses: actions/checkout@v4 + - uses: actions/setup-node@v4 + with: + node-version: "22.x" + cache: npm + - run: npm ci + - run: npm run build + - run: rm -rf node_modules + - uses: actions4git/setup-git@v1 + - run: git add -Af && git commit -m 'npm run build' + - run: git tag -f "$TAG" && git push -f origin "$TAG" + env: + TAG: ${{ github.event.release.tag_name }} + - uses: actions/publish-action@v0.4.0 + with: + source-tag: ${{ github.event.release.tag_name }} diff --git a/.github/workflows/test-action.yml b/.github/workflows/test-action.yml new file mode 100644 index 0000000..f7d2c7f --- /dev/null +++ b/.github/workflows/test-action.yml @@ -0,0 +1,55 @@ +name: Test action +on: + push: + branches: "main" + paths-ignore: + - .gitignore + - README.md + - LICENSE + - .github/** + - "!.github/workflows/test-action.yml" + pull_request: + paths-ignore: + - .gitignore + - README.md + - LICENSE + - .github/** + - "!.github/workflows/test-action.yml" +concurrency: + group: ${{ github.workflow }}-${{ github.ref }} + cancel-in-progress: true +jobs: + test-action: + runs-on: ubuntu-latest + steps: + - uses: actions/checkout@v4 + - uses: actions/setup-node@v4 + with: + node-version: "22.x" + cache: npm + - run: npm ci + - run: npm run typecheck + - run: npm run build + - name: Poison git auth config + run: | + git config --local credential.helper store + git config --local http.https://github.com/.extraheader "AUTHORIZATION: basic stale" + git config --local url.https://x-access-token:stale@github.com/.insteadOf https://github.com/ + - name: Configure raw git credentials + uses: ./ + with: + token: ${{ github.token }} + - run: test -n "$GIT_ASKPASS" + - run: test -x "$GIT_ASKPASS" + - run: test "$GIT_TERMINAL_PROMPT" = "0" + - run: test -n "$GIT_CONFIG_GLOBAL" + - run: test -f "$GIT_CONFIG_GLOBAL" + - run: test "$GIT_CONFIG_NOSYSTEM" = "1" + - run: test -n "$SETUP_GIT_CREDENTIALS_TOKEN" + - run: test "$("$GIT_ASKPASS" Username)" = "x-access-token" + - run: test "$("$GIT_ASKPASS" Password)" = "$SETUP_GIT_CREDENTIALS_TOKEN" + - run: test -z "$(git config --local --get-all credential.helper || true)" + - run: test -z "$(git config --local --get-all http.https://github.com/.extraheader || true)" + - run: test -z "$(git config --local --get-regexp '^url\..*\.insteadOf$' || true)" + - run: grep -q "helper =" "$GIT_CONFIG_GLOBAL" + - run: git ls-remote --get-url origin | grep -q '^https://github.com/' diff --git a/.gitignore b/.gitignore new file mode 100644 index 0000000..dd6e803 --- /dev/null +++ b/.gitignore @@ -0,0 +1,4 @@ +node_modules/ +dist/ +*.log +.DS_Store diff --git a/LICENSE b/LICENSE new file mode 100644 index 0000000..58baa56 --- /dev/null +++ b/LICENSE @@ -0,0 +1,21 @@ +MIT License + +Copyright (c) 2026 kostua16 + +Permission is hereby granted, free of charge, to any person obtaining a copy +of this software and associated documentation files (the "Software"), to deal +in the Software without restriction, including without limitation the rights +to use, copy, modify, merge, publish, distribute, sublicense, and/or sell +copies of the Software, and to permit persons to whom the Software is +furnished to do so, subject to the following conditions: + +The above copyright notice and this permission notice shall be included in all +copies or substantial portions of the Software. + +THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR +IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, +FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE +AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER +LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, +OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE +SOFTWARE. diff --git a/README.md b/README.md new file mode 100644 index 0000000..f37bff0 --- /dev/null +++ b/README.md @@ -0,0 +1,73 @@ +# Setup Git Credentials + +Configure later raw `git` commands in a GitHub Actions job to use an explicit +token through job-scoped runtime credentials. + +This action is intended for workflows where `gh` may already be authenticated +correctly, but raw `git push` can still be hijacked by stale runner Git config, +checkout extraheaders, credential helpers, or tokenized URL rewrites. + +## Usage + +Before raw `git push`: + +```yml +- uses: kostua16/setup-git-credentials@v1 + with: + token: ${{ secrets.GH_PAT }} +- run: git push origin HEAD +``` + +After switching `gh` to a PAT: + +```yml +- uses: kostua16/setup-gh@v1 + with: + token: ${{ secrets.GH_PAT }} + cli-token: ${{ secrets.GH_PAT }} + switch-account: true +- uses: kostua16/setup-git-credentials@v1 + with: + token: ${{ secrets.GH_PAT }} +``` + +Switch raw Git auth more than once in the same job: + +```yml +- uses: kostua16/setup-git-credentials@v1 + with: + token: ${{ secrets.FIRST_PAT }} +- run: git push origin HEAD:first-branch + +- uses: kostua16/setup-git-credentials@v1 + with: + token: ${{ secrets.SECOND_PAT }} +- run: git push origin HEAD:second-branch +``` + +## Inputs + +- **`token`:** Required token for later raw `git` commands. No default is + provided so callers choose the exact credential source. +- **`github-server-url`:** GitHub server URL to configure. Defaults to + `${{ github.server_url }}`. + +## Behavior + +- Exports `GIT_ASKPASS`, `GIT_TERMINAL_PROMPT=0`, `GIT_CONFIG_GLOBAL`, and + `GIT_CONFIG_NOSYSTEM=1` for later job steps. +- Stores the token only in a masked job environment variable used by askpass. +- Uses `x-access-token` as the Git username. +- Creates temp askpass and Git config files under `RUNNER_TEMP`. +- Clears stale checkout-local GitHub `credential.helper`, + `http.*.extraheader`, and `url.*.insteadOf` entries for the configured host. +- Adds non-tokenized SSH-to-HTTPS rewrites for the configured host. +- Never writes tokenized URLs or mutates user/global/system Git config. + +## Development + +```sh +npm ci +npm run typecheck +npm run build +``` diff --git a/action.yml b/action.yml new file mode 100644 index 0000000..92d05e3 --- /dev/null +++ b/action.yml @@ -0,0 +1,22 @@ +name: Setup Git Credentials +description: Configure raw git credentials for later GitHub Actions job steps + +branding: + icon: git-branch + color: blue + +inputs: + token: + description: > + Token to use for later raw git commands in this job. Pass the exact PAT + or GitHub token that should authenticate git. + required: true + github-server-url: + description: > + The GitHub server URL whose git credentials should be configured. + Defaults to the current github.server_url. + default: ${{ github.server_url }} + +runs: + using: node24 + main: dist/main.js diff --git a/package-lock.json b/package-lock.json new file mode 100644 index 0000000..7227700 --- /dev/null +++ b/package-lock.json @@ -0,0 +1,934 @@ +{ + "name": "setup-git-credentials", + "lockfileVersion": 3, + "requires": true, + "packages": { + "": { + "bundleDependencies": [ + "@actions/core", + "execa" + ], + "devDependencies": { + "@actions/core": "^1.10.1", + "@types/node": "^20.9.0", + "execa": "^8.0.1", + "typescript": "^5.0.0", + "vite": "^4.5.0" + } + }, + "node_modules/@actions/core": { + "version": "1.11.1", + "resolved": "https://registry.npmjs.org/@actions/core/-/core-1.11.1.tgz", + "integrity": 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"dev": true, + "inBundle": true, + "license": "ISC", + "dependencies": { + "isexe": "^2.0.0" + }, + "bin": { + "node-which": "bin/node-which" + }, + "engines": { + "node": ">= 8" + } + } + } +} diff --git a/package.json b/package.json new file mode 100644 index 0000000..c3664a6 --- /dev/null +++ b/package.json @@ -0,0 +1,18 @@ +{ + "type": "module", + "devDependencies": { + "@actions/core": "^1.10.1", + "@types/node": "^20.9.0", + "execa": "^8.0.1", + "typescript": "^5.0.0", + "vite": "^4.5.0" + }, + "scripts": { + "build": "vite build", + "typecheck": "tsc --noEmit" + }, + "bundleDependencies": [ + "@actions/core", + "execa" + ] +} diff --git a/src/main.ts b/src/main.ts new file mode 100644 index 0000000..828161c --- /dev/null +++ b/src/main.ts @@ -0,0 +1,230 @@ +import * as core from "@actions/core"; +import { chmodSync, mkdtempSync, writeFileSync } from "node:fs"; +import { join } from "node:path"; +import { tmpdir } from "node:os"; +import { execa } from "execa"; + +const gitTokenEnvName = "SETUP_GIT_CREDENTIALS_TOKEN"; +const gitAuthConfigPattern = + "^(credential\\.helper|http(\\..*)?\\.extraheader|url\\..*\\.insteadof)$"; + +type GitConfigEntry = { + key: string; + value: string; +}; + +function createGitCredentialDir() { + return mkdtempSync( + join(process.env.RUNNER_TEMP ?? tmpdir(), "setup-git-credentials-"), + ); +} + +function escapeGitConfigSubsection(value: string) { + return value.replace(/\\/g, "\\\\").replace(/"/g, '\\"'); +} + +function createAskpassScript(gitCredentialDir: string) { + const askpassPath = join( + gitCredentialDir, + process.platform === "win32" ? "git-askpass.cmd" : "git-askpass.sh", + ); + const script = + process.platform === "win32" + ? `@echo off +setlocal EnableExtensions +set "prompt=%~1" +echo(%prompt%| findstr /I "Username" >nul +if not errorlevel 1 ( + echo x-access-token + exit /b 0 +) +echo(%prompt%| findstr /I "Password" >nul +if not errorlevel 1 ( + echo(%${gitTokenEnvName}% + exit /b 0 +) +echo( +exit /b 0 +` + : `#!/usr/bin/env sh +case "$1" in + *Username*) printf '%s\\n' 'x-access-token' ;; + *Password*) printf '%s\\n' "\${${gitTokenEnvName}}" ;; + *) printf '\\n' ;; +esac +`; + + writeFileSync(askpassPath, script, { mode: 0o700 }); + chmodSync(askpassPath, 0o700); + return askpassPath; +} + +function createTempGlobalGitConfig(gitCredentialDir: string, serverUrl: URL) { + const gitConfigPath = join(gitCredentialDir, "gitconfig"); + const httpsBaseUrl = `${serverUrl.protocol}//${serverUrl.host}/`; + const sshUrlHost = serverUrl.host; + const sshScpHost = serverUrl.port ? serverUrl.hostname : serverUrl.host; + const config = [ + "[credential]", + "\thelper =", + "", + `[url "${escapeGitConfigSubsection(httpsBaseUrl)}"]`, + `\tinsteadOf = git@${sshScpHost}:`, + `\tinsteadOf = ssh://git@${sshUrlHost}/`, + "", + ].join("\n"); + + writeFileSync(gitConfigPath, config, { mode: 0o600 }); + return gitConfigPath; +} + +function sanitizeSecretBearingText(value: string) { + return value + .replace(/(https?:\/\/)(?:[^/\s@]+@)/gi, "$1***@") + .replace(/(x-access-token:)[^@/\s]+/gi, "$1***") + .replace(/(authorization:\s*(?:basic|bearer)\s+)\S+/gi, "$1***") + .replace(/(oauth_token[:=]\s*)\S+/gi, "$1***"); +} + +async function debugGitAuthConfigOrigins(label: string) { + if (!core.isDebug()) return; + + const result = await execa( + "git", + [ + "config", + "--show-origin", + "--show-scope", + "--name-only", + "--get-regexp", + gitAuthConfigPattern, + ], + { reject: false }, + ); + + if (result.exitCode === 1) { + core.debug(`${label}: no matching git auth config entries`); + return; + } + + if (result.exitCode !== 0) { + core.debug(`${label}: unable to inspect git auth config origins`); + return; + } + + for (const line of result.stdout.split(/\r?\n/).filter(Boolean)) { + core.debug(`${label}: ${sanitizeSecretBearingText(line)}`); + } +} + +async function getLocalGitConfigEntries(pattern: string): Promise { + const result = await execa( + "git", + ["config", "--local", "--get-regexp", pattern], + { reject: false }, + ); + + if (result.exitCode === 1) return []; + if (result.exitCode !== 0) { + core.debug("Unable to inspect local git auth config entries"); + return []; + } + + return result.stdout + .split(/\r?\n/) + .filter(Boolean) + .map((line) => { + const separator = line.search(/\s/); + if (separator === -1) return { key: line, value: "" }; + return { + key: line.slice(0, separator), + value: line.slice(separator).trim(), + }; + }); +} + +function isServerRelatedConfig(value: string, serverUrl: URL) { + const normalized = value.toLowerCase(); + return ( + normalized.includes(serverUrl.host.toLowerCase()) || + normalized.includes(serverUrl.hostname.toLowerCase()) + ); +} + +function shouldUnsetLocalGitAuthConfig(entry: GitConfigEntry, serverUrl: URL) { + const key = entry.key.toLowerCase(); + if (key === "credential.helper") return true; + if (key === "http.extraheader") return true; + if (key.startsWith("http.") && key.endsWith(".extraheader")) { + return isServerRelatedConfig(key, serverUrl); + } + if (key.startsWith("url.") && key.endsWith(".insteadof")) { + return isServerRelatedConfig(`${entry.key} ${entry.value}`, serverUrl); + } + return false; +} + +async function scrubLocalGitAuthConfig(serverUrl: URL) { + const workTreeResult = await execa( + "git", + ["rev-parse", "--is-inside-work-tree"], + { reject: false }, + ); + + if (workTreeResult.exitCode !== 0 || workTreeResult.stdout.trim() !== "true") { + core.debug("Skipping local git auth config cleanup outside a git worktree"); + return 0; + } + + const entries = await getLocalGitConfigEntries(gitAuthConfigPattern); + const keysToUnset = [ + ...new Set( + entries + .filter((entry) => shouldUnsetLocalGitAuthConfig(entry, serverUrl)) + .map((entry) => entry.key), + ), + ]; + + for (const key of keysToUnset) { + const result = await execa("git", ["config", "--local", "--unset-all", key], { + reject: false, + }); + if (result.exitCode !== 0 && result.exitCode !== 5) { + core.debug( + `Unable to unset local git config key ${sanitizeSecretBearingText(key)}`, + ); + } + } + + return keysToUnset.length; +} + +async function configureGitCredentials(serverUrl: URL, token: string) { + core.debug("setup-git-credentials: enabled"); + await debugGitAuthConfigOrigins("git auth config before setup"); + + const gitCredentialDir = createGitCredentialDir(); + const askpassPath = createAskpassScript(gitCredentialDir); + const gitConfigPath = createTempGlobalGitConfig(gitCredentialDir, serverUrl); + + core.setSecret(token); + core.exportVariable(gitTokenEnvName, token); + core.exportVariable("GIT_ASKPASS", askpassPath); + core.exportVariable("GIT_TERMINAL_PROMPT", "0"); + core.exportVariable("GIT_CONFIG_GLOBAL", gitConfigPath); + core.exportVariable("GIT_CONFIG_NOSYSTEM", "1"); + + const scrubbedLocalKeys = await scrubLocalGitAuthConfig(serverUrl); + core.debug(`git credential temp config: ${gitConfigPath}`); + core.debug(`git askpass script: ${askpassPath}`); + core.debug(`local git auth config keys scrubbed: ${scrubbedLocalKeys}`); + await debugGitAuthConfigOrigins("git auth config after setup"); +} + +try { + const token = core.getInput("token", { required: true }); + const serverUrl = new URL(core.getInput("github-server-url")); + await configureGitCredentials(serverUrl, token); +} catch (error) { + core.setFailed(error instanceof Error ? error.message : String(error)); +} diff --git a/tsconfig.json b/tsconfig.json new file mode 100644 index 0000000..5e17e93 --- /dev/null +++ b/tsconfig.json @@ -0,0 +1,21 @@ +{ + "compilerOptions": { + "target": "ES2020", + "useDefineForClassFields": true, + "module": "ESNext", + "lib": ["ES2020", "DOM", "DOM.Iterable"], + "skipLibCheck": true, + + "moduleResolution": "bundler", + "allowImportingTsExtensions": true, + "resolveJsonModule": true, + "isolatedModules": true, + "noEmit": true, + + "strict": true, + "noUnusedLocals": true, + "noUnusedParameters": true, + "noFallthroughCasesInSwitch": true + }, + "include": ["src"] +} diff --git a/vite.config.ts b/vite.config.ts new file mode 100644 index 0000000..8ab5498 --- /dev/null +++ b/vite.config.ts @@ -0,0 +1,15 @@ +import { defineConfig } from "vite"; + +export default defineConfig({ + build: { + minify: false, + target: "node20", + ssr: true, + rollupOptions: { + input: ["src/main.ts"], + }, + }, + ssr: { + noExternal: /^(?!node:)/, + }, +});