feat(manifest): add support for releasing root module

__snapshots__/manifest.js

@@ -1,3 +1,134 @@
+exports['Manifest pullRequest allows root module to be published, via special "." path: changes'] = `
+
+filename: node/pkg1/CHANGELOG.md
+# Changelog
+
+## [4.0.0](https://github.com/fake/repo/compare/pkg1-v3.2.1...pkg1-v4.0.0) (1983-10-10)
+
+
+### ⚠ BREAKING CHANGES
+
+* **@node/pkg1:** major new feature
+
+### Features
+
+* **@node/pkg1:** major new feature ([e3ab0ab](https://github.com/fake/repo/commit/e3ab0abfd66e66324f685ceeececf35c))
+
+filename: node/pkg1/package.json
+{
+  "name": "@node/pkg1",
+  "version": "4.0.0"
+}
+
+filename: node/pkg2/CHANGELOG.md
+# Changelog
+
+## [2.0.0](https://github.com/fake/repo/compare/pkg2-v1.2.3...pkg2-v2.0.0) (1983-10-10)
+
+
+### ⚠ BREAKING CHANGES
+
+* **@node/pkg2:** major new feature
+
+### Features
+
+* **@node/pkg2:** major new feature ([72f962d](https://github.com/fake/repo/commit/72f962d44ba0bcee15594ea6bdc67d8b))
+
+filename: node/pkg2/package.json
+{
+  "name": "@node/pkg2",
+  "version": "2.0.0"
+}
+
+filename: CHANGELOG.md
+# Changelog
+
+## [3.0.0](https://github.com/fake/repo/compare/googleapis-v2.0.0...googleapis-v3.0.0) (1983-10-10)
+
+
+### ⚠ BREAKING CHANGES
+
+* **@node/pkg2:** major new feature
+
+### Features
+
+* **@node/pkg2:** major new feature ([72f962d](https://github.com/fake/repo/commit/72f962d44ba0bcee15594ea6bdc67d8b))
+
+filename: package.json
+{
+  "name": "googleapis",
+  "version": "3.0.0"
+}
+
+filename: .release-please-manifest.json
+{
+  ".": "3.0.0",
+  "node/pkg1": "4.0.0",
+  "node/pkg2": "2.0.0"
+}
+
+`
+
+exports['Manifest pullRequest allows root module to be published, via special "." path: options'] = `
+
+upstreamOwner: fake
+upstreamRepo: repo
+title: chore: release
+branch: release-please/branches/main
+description: :robot: I have created a release \\*beep\\* \\*boop\\*
+
+---
+@node/pkg1: 4.0.0
+## [4.0.0](https://github.com/fake/repo/compare/pkg1-v3.2.1...pkg1-v4.0.0) (1983-10-10)
+
+
+### ⚠ BREAKING CHANGES
+
+* **@node/pkg1:** major new feature
+
+### Features
+
+* **@node/pkg1:** major new feature ([e3ab0ab](https://github.com/fake/repo/commit/e3ab0abfd66e66324f685ceeececf35c))
+---
+
+
+---
+@node/pkg2: 2.0.0
+## [2.0.0](https://github.com/fake/repo/compare/pkg2-v1.2.3...pkg2-v2.0.0) (1983-10-10)
+
+
+### ⚠ BREAKING CHANGES
+
+* **@node/pkg2:** major new feature
+
+### Features
+
+* **@node/pkg2:** major new feature ([72f962d](https://github.com/fake/repo/commit/72f962d44ba0bcee15594ea6bdc67d8b))
+---
+
+
+---
+googleapis: 3.0.0
+## [3.0.0](https://github.com/fake/repo/compare/googleapis-v2.0.0...googleapis-v3.0.0) (1983-10-10)
+
+
+### ⚠ BREAKING CHANGES
+
+* **@node/pkg2:** major new feature
+
+### Features
+
+* **@node/pkg2:** major new feature ([72f962d](https://github.com/fake/repo/commit/72f962d44ba0bcee15594ea6bdc67d8b))
+---
+
+
+This PR was generated with [Release Please](https://github.com/googleapis/release-please). See [documentation](https://github.com/googleapis/release-please#release-please).
+primary: main
+force: true
+fork: false
+message: chore: release
+`
+
 exports['Manifest pullRequest boostraps from HEAD manifest if first PR: changes'] = `
 
 filename: node/pkg1/CHANGELOG.md

src/manifest.ts

@@ -293,7 +293,9 @@ export class Manifest {
     const missingVersionPaths = [];
     const defaultBranch = await this.gh.getDefaultBranch();
     for (const pkg of packages) {
-      const commits = commitsPerPath[pkg.path];
+      // The special path of '.' indicates the root module is being released
+      // in this case, use the entire list of commits:
+      commits = pkg.path === '.' ? commits : commitsPerPath[pkg.path];
       if (!commits || commits.length === 0) {
         continue;
       }

src/release-pr.ts

@@ -87,7 +87,9 @@ export class ReleasePR {
   constructor(options: ReleasePRConstructorOptions) {
     this.bumpMinorPreMajor = options.bumpMinorPreMajor || false;
     this.labels = options.labels ?? DEFAULT_LABELS;
-    this.path = options.path;
+    // undefined represents the root path of the library, if the special
+    // '.' path is provided, simply ignore it:
+    this.path = options.path !== '.' ? options.path : undefined;
     this.packageName = options.packageName || '';
     this.monorepoTags = options.monorepoTags || false;
     this.releaseAs = options.releaseAs;

test/fixtures/manifest/repo/package.json

@@ -0,0 +1,4 @@
+{
+  "name": "googleapis",
+  "version": "3.3.3"
+}

test/manifest.ts

@@ -145,6 +145,9 @@ describe('Manifest', () => {
         'node/pkg2/CHANGELOG.md',
         'python/CHANGELOG.md',
         'python/HISTORY.md',
+        'package-lock.json',
+        'samples/package.json',
+        'CHANGELOG.md',
       ];
       for (const notFound of expectedNotFound) {
         mock
@@ -283,6 +286,77 @@ describe('Manifest', () => {
       ]);
     });
 
+    it('allows root module to be published, via special "." path', async function () {
+      const manifest = JSON.stringify({
+        'node/pkg1': '3.2.1',
+        'node/pkg2': '1.2.3',
+        '.': '2.0.0',
+      });
+      const config = JSON.stringify({
+        packages: {
+          'node/pkg1': {},
+          'node/pkg2': {},
+          '.': {},
+        },
+      });
+      const commits = [
+        buildMockCommit('feat(@node/pkg1)!: major new feature', [
+          'node/pkg1/src/foo.ts',
+        ]),
+        buildMockCommit('feat(@node/pkg2)!: major new feature', [
+          'node/pkg2/src/bar.ts',
+        ]),
+      ];
+
+      const github = new GitHub({
+        owner: 'fake',
+        repo: 'repo',
+        defaultBranch,
+      });
+      const mock = mockGithub(github);
+      expectManifest(mock, {manifest, lastReleaseSha});
+      expectPR(mock, {lastReleaseSha});
+      expectCommitsSinceSha(mock, {commits, lastReleaseSha});
+      expectGetFiles(mock, {
+        fixtureFiles: [
+          'node/pkg1/package.json',
+          'node/pkg2/package.json',
+          'package.json',
+        ],
+        inlineFiles: [
+          ['release-please-config.json', config],
+          ['.release-please-manifest.json', manifest],
+        ],
+      });
+      expectLabelAndComment(mock, {addLabel});
+      stubSuggesterWithSnapshot(sandbox, this.test!.fullTitle());
+      const logs: [string, CheckpointType][] = [];
+      const checkpoint = (msg: string, type: CheckpointType) =>
+        logs.push([msg, type]);
+
+      const pr = await new Manifest({github, checkpoint}).pullRequest();
+
+      mock.verify();
+      expect(pr).to.equal(22);
+      expect(logs).to.eql([
+        [
+          'Found version 3.2.1 for node/pkg1 in .release-please-manifest.json at abc123 of main',
+          CheckpointType.Success,
+        ],
+        [
+          'Found version 1.2.3 for node/pkg2 in .release-please-manifest.json at abc123 of main',
+          CheckpointType.Success,
+        ],
+        [
+          'Found version 2.0.0 for . in .release-please-manifest.json at abc123 of main',
+          CheckpointType.Success,
+        ],
+        ['Processing package: Node(@node/pkg1)', CheckpointType.Success],
+        ['Processing package: Node(@node/pkg2)', CheckpointType.Success],
+        ['Processing package: Node(googleapis)', CheckpointType.Success],
+      ]);
+    });
+
     it('respects python releaser specific config over defaults', async function () {
       // https://github.com/googleapis/release-please/pull/790#issuecomment-783792069
       if (process.versions.node.split('.')[0] === '10') {