github: add serverURL annd provenanceBuilderID

Signed-off-by: CrazyMax <crazy-max@users.noreply.github.com>

__tests__/github.test.ts

@@ -1,10 +1,11 @@
-import {describe, expect, jest, it, beforeEach} from '@jest/globals';
+import {describe, expect, jest, it, beforeEach, afterEach} from '@jest/globals';
-import {Context} from '@actions/github/lib/context';
 
+import {Context} from '@actions/github/lib/context';
 import {GitHub, Payload, ReposGetResponseData} from '../src/github';
 
 beforeEach(() => {
   jest.clearAllMocks();
+  GitHub.getInstance().reset();
 });
 
 jest.spyOn(GitHub.prototype, 'context').mockImplementation((): Context => {
@@ -24,12 +25,39 @@ jest.spyOn(GitHub.prototype as any, 'ref').mockImplementation((): string => {
   return 'refs/heads/master';
 });
 
+describe('serverURL', () => {
+  const originalEnv = process.env;
+  beforeEach(() => {
+    jest.resetModules();
+    process.env = {
+      ...originalEnv,
+      GITHUB_SERVER_URL: 'https://foo.github.com'
+    };
+  });
+  afterEach(() => {
+    process.env = originalEnv;
+  });
+  it('returns default', async () => {
+    process.env.GITHUB_SERVER_URL = '';
+    expect(GitHub.getInstance().serverURL()).toEqual('https://github.com');
+  });
+  it('returns from env', async () => {
+    expect(GitHub.getInstance().serverURL()).toEqual('https://foo.github.com');
+  });
+});
+
 describe('gitContext', () => {
   it('returns refs/heads/master', async () => {
     expect(GitHub.getInstance().gitContext()).toEqual('https://github.com/docker/test-docker-action.git#refs/heads/master');
   });
 });
 
+describe('provenanceBuilderID', () => {
+  it('returns 123', async () => {
+    expect(GitHub.getInstance().provenanceBuilderID()).toEqual('https://github.com/docker/test-docker-action/actions/runs/123');
+  });
+});
+
 describe('repo', () => {
   it('returns GitHub repository', async () => {
     const repo = await GitHub.getInstance().repo(process.env.GITHUB_TOKEN || '');

jest.config.ts

@@ -1,5 +1,6 @@
 process.env = Object.assign({}, process.env, {
   GITHUB_REPOSITORY: 'docker/test-docker-action',
+  GITHUB_RUN_ID: '123',
   RUNNER_TEMP: '/tmp/github_runner',
   RUNNER_TOOL_CACHE: '/tmp/github_tool_cache'
 }) as {

src/github.ts

@@ -14,7 +14,9 @@ interface Jwt extends JwtPayload {
 export class GitHub {
   private static instance?: GitHub;
   static getInstance = (): GitHub => (GitHub.instance = GitHub.instance ?? new GitHub());
+  private static _serverURL: string;
   private static _gitContext: string;
+  private static _provenanceBuilderID: string;
 
   private constructor() {
     let ref = this.ref();
@@ -24,7 +26,13 @@ export class GitHub {
     if (github.context.sha && !ref.startsWith(`refs/pull/`)) {
       ref = github.context.sha;
     }
-    GitHub._gitContext = `${process.env.GITHUB_SERVER_URL || 'https://github.com'}/${github.context.repo.owner}/${github.context.repo.repo}.git#${ref}`;
+    GitHub._serverURL = process.env.GITHUB_SERVER_URL || 'https://github.com';
+    GitHub._gitContext = `${GitHub._serverURL}/${github.context.repo.owner}/${github.context.repo.repo}.git#${ref}`;
+    GitHub._provenanceBuilderID = `${GitHub._serverURL}/${github.context.repo.owner}/${github.context.repo.repo}/actions/runs/${github.context.runId}`;
+  }
+
+  public reset() {
+    GitHub.instance = undefined;
   }
 
   public context(): Context {
@@ -35,10 +43,18 @@ export class GitHub {
     return github.context.ref;
   }
 
+  public serverURL() {
+    return GitHub._serverURL;
+  }
+
   public gitContext() {
     return GitHub._gitContext;
   }
 
+  public provenanceBuilderID() {
+    return GitHub._provenanceBuilderID;
+  }
+
   private payload(): Payload {
     return github.context.payload;
   }