fix: allow configuring multiple, separate linked-versions plugins (#1961)

* test: failing test for configuring multiple, separate linked-versions plugins

* fix: allow configuring multiple, separate linked-versions plugins

* test: failing test for having separate branch names

* fix: grouped pull requests should have different branch names

* chore: remove debugging logs

* 🦉 Updates from OwlBot post-processor

See https://github.com/googleapis/repo-automation-bots/blob/main/packages/owl-bot/README.md

---------

Co-authored-by: Owl Bot <gcf-owl-bot[bot]@users.noreply.github.com>

Author: chingor13

__snapshots__/linked-versions.js

@@ -46,6 +46,64 @@ exports['LinkedVersions plugin can skip grouping pull requests 3'] = `
 This PR was generated with [Release Please](https://github.com/googleapis/release-please). See [documentation](https://github.com/googleapis/release-please#release-please).
 `
 
+exports['LinkedVersions plugin should allow multiple groups of linked versions 1'] = `
+:robot: I have created a release *beep* *boop*
+---
+
+
+<details><summary>pkg1: 1.0.1</summary>
+
+## [1.0.1](https://github.com/fake-owner/fake-repo/compare/pkg1-v1.0.0...pkg1-v1.0.1) (1983-10-10)
+
+
+### Bug Fixes
+
+* some bugfix ([aaaaaa](https://github.com/fake-owner/fake-repo/commit/aaaaaa))
+</details>
+
+<details><summary>pkg4: 1.0.1</summary>
+
+## [1.0.1](https://github.com/fake-owner/fake-repo/compare/pkg4-v1.0.0...pkg4-v1.0.1) (1983-10-10)
+
+
+### Miscellaneous Chores
+
+* **pkg4:** Synchronize second group name versions
+</details>
+
+---
+This PR was generated with [Release Please](https://github.com/googleapis/release-please). See [documentation](https://github.com/googleapis/release-please#release-please).
+`
+
+exports['LinkedVersions plugin should allow multiple groups of linked versions 2'] = `
+:robot: I have created a release *beep* *boop*
+---
+
+
+<details><summary>pkg2: 0.2.4</summary>
+
+## [0.2.4](https://github.com/fake-owner/fake-repo/compare/pkg2-v0.2.3...pkg2-v0.2.4) (1983-10-10)
+
+
+### Bug Fixes
+
+* some bugfix ([bbbbbb](https://github.com/fake-owner/fake-repo/commit/bbbbbb))
+</details>
+
+<details><summary>pkg3: 0.2.4</summary>
+
+## [0.2.4](https://github.com/fake-owner/fake-repo/compare/pkg3-v0.2.3...pkg3-v0.2.4) (1983-10-10)
+
+
+### Miscellaneous Chores
+
+* **pkg3:** Synchronize group name versions
+</details>
+
+---
+This PR was generated with [Release Please](https://github.com/googleapis/release-please). See [documentation](https://github.com/googleapis/release-please#release-please).
+`
+
 exports['LinkedVersions plugin should group pull requests 1'] = `
 :robot: I have created a release *beep* *boop*
 ---

src/manifest.ts

@@ -746,12 +746,9 @@ export class Manifest {
     // pull requests
     if (!this.separatePullRequests) {
       this.plugins.push(
-        new Merge(
-          this.github,
-          this.targetBranch,
-          this.repositoryConfig,
-          this.groupPullRequestTitlePattern
-        )
+        new Merge(this.github, this.targetBranch, this.repositoryConfig, {
+          pullRequestTitlePattern: this.groupPullRequestTitlePattern,
+        })
       );
     }
 

src/plugins/linked-versions.ts

@@ -22,6 +22,7 @@ import {Release} from '../release';
 import {Version} from '../version';
 import {buildStrategy} from '../factory';
 import {Merge} from './merge';
+import {BranchName} from '../util/branch-name';
 
 interface LinkedVersionsPluginOptions {
   merge?: boolean;
@@ -154,6 +155,7 @@ export class LinkedVersions extends ManifestPlugin {
       (collection, candidate) => {
         if (!candidate.pullRequest.version) {
           this.logger.warn('pull request missing version', candidate);
+          collection[1].push(candidate);
           return collection;
         }
         if (this.components.has(candidate.config.component || '')) {
@@ -175,7 +177,14 @@ export class LinkedVersions extends ManifestPlugin {
         this.github,
         this.targetBranch,
         this.repositoryConfig,
-        `chore\${scope}: release ${this.groupName} libraries`
+        {
+          pullRequestTitlePattern: `chore\${scope}: release ${this.groupName} libraries`,
+          forceMerge: true,
+          headBranchName: BranchName.ofGroupTargetBranch(
+            this.groupName,
+            this.targetBranch
+          ).toString(),
+        }
       );
       const merged = await merge.run(inScopeCandidates);
       outOfScopeCandidates.push(...merged);

src/plugins/merge.ts

@@ -26,6 +26,13 @@ import {Update} from '../update';
 import {mergeUpdates} from '../updaters/composite';
 import {GitHub} from '../github';
 
+interface MergeOptions {
+  pullRequestTitlePattern?: string;
+  pullRequestHeader?: string;
+  headBranchName?: string;
+  forceMerge?: boolean;
+}
+
 /**
  * This plugin merges multiple pull requests into a single
  * release pull request.
@@ -35,18 +42,21 @@ import {GitHub} from '../github';
 export class Merge extends ManifestPlugin {
   private pullRequestTitlePattern?: string;
   private pullRequestHeader?: string;
+  private headBranchName?: string;
+  private forceMerge: boolean;
 
   constructor(
     github: GitHub,
     targetBranch: string,
     repositoryConfig: RepositoryConfig,
-    pullRequestTitlePattern?: string,
-    pullRequestHeader?: string
+    options: MergeOptions = {}
   ) {
     super(github, targetBranch, repositoryConfig);
     this.pullRequestTitlePattern =
-      pullRequestTitlePattern || MANIFEST_PULL_REQUEST_TITLE_PATTERN;
-    this.pullRequestHeader = pullRequestHeader;
+      options.pullRequestTitlePattern ?? MANIFEST_PULL_REQUEST_TITLE_PATTERN;
+    this.pullRequestHeader = options.pullRequestHeader;
+    this.headBranchName = options.headBranchName;
+    this.forceMerge = options.forceMerge ?? false;
   }
 
   async run(
@@ -61,7 +71,7 @@ export class Merge extends ManifestPlugin {
       Array<Array<CandidateReleasePullRequest>>
     >(
       (collection, candidate) => {
-        if (candidate.config.separatePullRequests) {
+        if (candidate.config.separatePullRequests && !this.forceMerge) {
           collection[1].push(candidate);
         } else {
           collection[0].push(candidate);
@@ -101,7 +111,9 @@ export class Merge extends ManifestPlugin {
       }),
       updates,
       labels: Array.from(labels),
-      headRefName: BranchName.ofTargetBranch(this.targetBranch).toString(),
+      headRefName:
+        this.headBranchName ??
+        BranchName.ofTargetBranch(this.targetBranch).toString(),
       draft: !candidates.some(candidate => !candidate.pullRequest.draft),
     };
 

src/util/branch-name.ts

@@ -28,6 +28,7 @@ function getAllResourceNames(): BranchNameType[] {
   return [
     AutoreleaseBranchName,
     ComponentBranchName,
+    GroupBranchName,
     DefaultBranchName,
     V12ComponentBranchName,
     V12DefaultBranchName,
@@ -78,6 +79,13 @@ export class BranchName {
       `${RELEASE_PLEASE}--branches--${targetBranch}--components--${component}`
     );
   }
+  static ofGroupTargetBranch(group: string, targetBranch: string): BranchName {
+    return new GroupBranchName(
+      `${RELEASE_PLEASE}--branches--${targetBranch}--groups--${safeBranchName(
+        group
+      )}`
+    );
+  }
   constructor(_branchName: string) {}
 
   static matches(_branchName: string): boolean {
@@ -211,3 +219,28 @@ class ComponentBranchName extends BranchName {
     return `${RELEASE_PLEASE}--branches--${this.targetBranch}--components--${this.component}`;
   }
 }
+
+const GROUP_PATTERN = `^${RELEASE_PLEASE}--branches--(?<branch>.+)--groups--(?<group>.+)$`;
+class GroupBranchName extends BranchName {
+  static matches(branchName: string): boolean {
+    return !!branchName.match(GROUP_PATTERN);
+  }
+  constructor(branchName: string) {
+    super(branchName);
+    const match = branchName.match(GROUP_PATTERN);
+    if (match?.groups) {
+      this.targetBranch = match.groups['branch'];
+      this.component = match.groups['group'];
+    }
+  }
+  toString(): string {
+    return `${RELEASE_PLEASE}--branches--${this.targetBranch}--groups--${this.component}`;
+  }
+}
+
+function safeBranchName(branchName: string): string {
+  // convert disallowed characters in branch names, replacing them with '-'.
+  // replace multiple consecutive '-' with a single '-' to avoid interfering with
+  // our regexes for parsing the branch names
+  return branchName.replace(/[^\w\d]/g, '-').replace(/-+/g, '-');
+}

test/plugins/linked-versions.ts

@@ -75,6 +75,12 @@ describe('LinkedVersions plugin', () => {
         tagName: 'pkg3-v0.2.3',
         url: 'https://github.com/fake-owner/fake-repo/releases/tag/pkg3-v0.2.3',
       },
+      {
+        id: 4,
+        sha: 'abc123',
+        tagName: 'pkg4-v1.0.0',
+        url: 'https://github.com/fake-owner/fake-repo/releases/tag/pkg1-v1.0.0',
+      },
     ]);
     mockCommits(sandbox, github, [
       {
@@ -265,4 +271,79 @@ describe('LinkedVersions plugin', () => {
       safeSnapshot(pullRequest.body.toString());
     }
   });
+  it('should allow multiple groups of linked versions', async () => {
+    const manifest = new Manifest(
+      github,
+      'target-branch',
+      {
+        'path/a': {
+          releaseType: 'simple',
+          component: 'pkg1',
+        },
+        'path/b': {
+          releaseType: 'simple',
+          component: 'pkg2',
+        },
+        'path/c': {
+          releaseType: 'simple',
+          component: 'pkg3',
+        },
+        'path/d': {
+          releaseType: 'simple',
+          component: 'pkg4',
+        },
+      },
+      {
+        'path/a': Version.parse('1.0.0'),
+        'path/b': Version.parse('0.2.3'),
+        'path/c': Version.parse('0.2.3'),
+        'path/d': Version.parse('1.0.0'),
+      },
+      {
+        separatePullRequests: true,
+        plugins: [
+          {
+            type: 'linked-versions',
+            groupName: 'group name',
+            components: ['pkg2', 'pkg3'],
+          },
+          {
+            type: 'linked-versions',
+            groupName: 'second group name',
+            components: ['pkg1', 'pkg4'],
+          },
+        ],
+      }
+    );
+    const pullRequests = await manifest.buildPullRequests();
+    expect(pullRequests).lengthOf(2);
+    const groupPullRequest1 = pullRequests[1];
+    const packageData1 = groupPullRequest1.body.releaseData.find(
+      data => data.component === 'pkg1'
+    );
+    expect(packageData1).to.not.be.undefined;
+    const packageData4 = groupPullRequest1.body.releaseData.find(
+      data => data.component === 'pkg4'
+    );
+    expect(packageData4).to.not.be.undefined;
+    safeSnapshot(groupPullRequest1.body.toString());
+
+    const groupPullRequest2 = pullRequests[0];
+    const packageData2 = groupPullRequest2.body.releaseData.find(
+      data => data.component === 'pkg2'
+    );
+    expect(packageData2).to.not.be.undefined;
+    const packageData3 = groupPullRequest2.body.releaseData.find(
+      data => data.component === 'pkg3'
+    );
+    expect(packageData3).to.not.be.undefined;
+    expect(packageData2?.version).to.eql(packageData3?.version);
+    safeSnapshot(groupPullRequest2.body.toString());
+
+    expect(groupPullRequest1.headRefName).not.to.eql(
+      groupPullRequest2.headRefName
+    );
+    expect(groupPullRequest1.headRefName).to.not.include(' ');
+    expect(groupPullRequest2.headRefName).to.not.include(' ');
+  });
 });