feat: add support for monorepos/releasing from alternate folders

README.md

@@ -148,10 +148,12 @@ release-please release-pr --package-name=@google-cloud/firestore" \
 
 | option            | description                                             |
 |-------------------|---------------------------------------------------------|
-| `--package-name`  | is the name of the package to publish to publish to  an upstream registry such as npm. |
+| `--package-name`  | is the name of the package to publish to publish to an upstream registry such as npm. |
 | `--repo-url`      | is the URL of the repository on GitHub.                 |
 | `--token`         | a token with write access to `--repo-url`.              |
 | `--default-branch`| branch to open pull release PR against (detected by default). |
+| `--path`          | create a release from a path other than the repository's root |
+| `--monorepo-tags` | add prefix to tags and branches, allowing multiple libraries to be released from the same repository. |
 
 ### Creating a release on GitHub
 
@@ -165,6 +167,7 @@ release-please github-release --repo-url=googleapis/nodejs-firestore \
 | `--package-name`  | is the name of the package to publish to publish to  an upstream registry such as npm. |
 | `--repo-url`      | is the URL of the repository on GitHub.                 |
 | `--token`         | a token with write access to `--repo-url`.              |
+| `--path`          | create a release from a path other than the repository's root |
 
 ### Running as a GitHub App
 

__snapshots__/node.js

@@ -9,11 +9,11 @@ exports['papckage-lock-json-node-with'] = `
 
 `
 
-exports['CHANGELOG-node-message-no-package-lock'] = `
+exports['CHANGELOG-node-message-with-package-lock'] = `
 chore: created CHANGELOG.md [ci skip]
 `
 
-exports['CHANGELOG-node-no-package-lock'] = `
+exports['CHANGELOG-node-with-package-lock'] = `
 # Changelog
 
 ### [0.123.5](https://www.github.com/googleapis/node-test-repo/compare/v0.123.4...v0.123.5) 
@@ -26,11 +26,11 @@ exports['CHANGELOG-node-no-package-lock'] = `
 
 `
 
-exports['package-json-node-message-no-package-lock'] = `
+exports['package-json-node-message-with-package-lock'] = `
 chore: updated package.json
 `
 
-exports['package-json-node-no-package-lock'] = `
+exports['package-json-node-with-package-lock'] = `
 {
   "name": "node-test-repo",
   "version": "0.123.5",
@@ -41,11 +41,37 @@ exports['package-json-node-no-package-lock'] = `
 
 `
 
-exports['CHANGELOG-node-message-with-package-lock'] = `
+exports['package-lock-json-node-message'] = `
+chore: updated package-lock.json [ci skip]
+`
+
+exports['PR body-node-with-package-lock'] = `
+:robot: I have created a release \\*beep\\* \\*boop\\* 
+---
+### [0.123.5](https://www.github.com/googleapis/node-test-repo/compare/v0.123.4...v0.123.5) 
+
+
+### Bug Fixes
+
+* **deps:** update dependency com.google.cloud:google-cloud-spanner to v1.50.0 ([1f9663c](https://www.github.com/googleapis/node-test-repo/commit/1f9663cf08ab1cf3b68d95dee4dc99b7c4aac373))
+* **deps:** update dependency com.google.cloud:google-cloud-storage to v1.120.0 ([fcd1c89](https://www.github.com/googleapis/node-test-repo/commit/fcd1c890dc1526f4d62ceedad561f498195c8939))
+---
+
+
+This PR was generated with [Release Please](https://github.com/googleapis/release-please).
+`
+
+exports['labels-node-with-package-lock'] = {
+  'labels': [
+    'autorelease: pending'
+  ]
+}
+
+exports['CHANGELOG-node-message-'] = `
 chore: created CHANGELOG.md [ci skip]
 `
 
-exports['CHANGELOG-node-with-package-lock'] = `
+exports['CHANGELOG-node-'] = `
 # Changelog
 
 ### [0.123.5](https://www.github.com/googleapis/node-test-repo/compare/v0.123.4...v0.123.5) 
@@ -58,11 +84,11 @@ exports['CHANGELOG-node-with-package-lock'] = `
 
 `
 
-exports['package-json-node-message-with-package-lock'] = `
+exports['package-json-node-message-'] = `
 chore: updated package.json
 `
 
-exports['package-json-node-with-package-lock'] = `
+exports['package-json-node-'] = `
 {
   "name": "node-test-repo",
   "version": "0.123.5",
@@ -73,11 +99,7 @@ exports['package-json-node-with-package-lock'] = `
 
 `
 
-exports['package-lock-json-node-message'] = `
-chore: updated package-lock.json [ci skip]
-`
-
-exports['PR body-node-no-package-lock'] = `
+exports['PR body-node-'] = `
 :robot: I have created a release \\*beep\\* \\*boop\\* 
 ---
 ### [0.123.5](https://www.github.com/googleapis/node-test-repo/compare/v0.123.4...v0.123.5) 
@@ -93,13 +115,45 @@ exports['PR body-node-no-package-lock'] = `
 This PR was generated with [Release Please](https://github.com/googleapis/release-please).
 `
 
-exports['labels-node-no-package-lock'] = {
+exports['labels-node-'] = {
   'labels': [
     'autorelease: pending'
   ]
 }
 
-exports['PR body-node-with-package-lock'] = `
+exports['CHANGELOG-node-message-with-path'] = `
+chore: created packages/foo/CHANGELOG.md [ci skip]
+`
+
+exports['CHANGELOG-node-with-path'] = `
+# Changelog
+
+### [0.123.5](https://www.github.com/googleapis/node-test-repo/compare/v0.123.4...v0.123.5) 
+
+
+### Bug Fixes
+
+* **deps:** update dependency com.google.cloud:google-cloud-spanner to v1.50.0 ([1f9663c](https://www.github.com/googleapis/node-test-repo/commit/1f9663cf08ab1cf3b68d95dee4dc99b7c4aac373))
+* **deps:** update dependency com.google.cloud:google-cloud-storage to v1.120.0 ([fcd1c89](https://www.github.com/googleapis/node-test-repo/commit/fcd1c890dc1526f4d62ceedad561f498195c8939))
+
+`
+
+exports['package-json-node-message-with-path'] = `
+chore: updated packages/foo/package.json
+`
+
+exports['package-json-node-with-path'] = `
+{
+  "name": "node-test-repo",
+  "version": "0.123.5",
+  "repository": {
+    "url": "git@github.com:samples/node-test-repo.git"
+  }
+}
+
+`
+
+exports['PR body-node-with-path'] = `
 :robot: I have created a release \\*beep\\* \\*boop\\* 
 ---
 ### [0.123.5](https://www.github.com/googleapis/node-test-repo/compare/v0.123.4...v0.123.5) 
@@ -115,7 +169,7 @@ exports['PR body-node-with-package-lock'] = `
 This PR was generated with [Release Please](https://github.com/googleapis/release-please).
 `
 
-exports['labels-node-with-package-lock'] = {
+exports['labels-node-with-path'] = {
   'labels': [
     'autorelease: pending'
   ]

src/bin/release-please.ts

@@ -72,6 +72,15 @@ const argv = yargs
         .option('default-branch', {
           describe: 'default branch to open release PR against',
           type: 'string',
+        })
+        .option('path', {
+          describe: 'release from path other than root directory',
+          type: 'string',
+        })
+        .option('monorepo-tags', {
+          describe: 'include library name in tags and release branches',
+          type: 'boolean',
+          default: false,
         });
     },
     (argv: ReleasePROptions) => {
@@ -99,6 +108,10 @@ const argv = yargs
           describe: 'what type of repo is a release being created for?',
           choices: getReleaserNames(),
           default: 'node',
+        })
+        .option('path', {
+          describe: 'release from path other than root directory',
+          type: 'string',
         });
     },
     (argv: GitHubReleaseOptions) => {

src/github-release.ts

@@ -13,6 +13,7 @@
 // limitations under the License.
 
 import chalk = require('chalk');
+import {join} from 'path';
 
 import {checkpoint, CheckpointType} from './util/checkpoint';
 import {ReleasePRFactory} from './release-pr-factory';
@@ -30,6 +31,7 @@ const GITHUB_RELEASE_LABEL = 'autorelease: tagged';
 export interface GitHubReleaseOptions {
   label: string;
   repoUrl: string;
+  path?: string;
   packageName?: string;
   token?: string;
   apiUrl: string;
@@ -44,6 +46,7 @@ export class GitHubRelease {
   gh: GitHub;
   labels: string[];
   repoUrl: string;
+  path?: string;
   packageName?: string;
   token?: string;
   proxyKey?: string;
@@ -55,6 +58,7 @@ export class GitHubRelease {
     this.labels = options.label.split(',');
     this.repoUrl = options.repoUrl;
     this.token = options.token;
+    this.path = options.path;
     this.packageName = options.packageName;
     this.releaseType = options.releaseType;
 
@@ -76,11 +80,13 @@ export class GitHubRelease {
       );
 
       const changelogContents = (
-        await this.gh.getFileContents(this.changelogPath)
+        await this.gh.getFileContents(this.addPath(this.changelogPath))
       ).parsedContent;
+      console.info(changelogContents, gitHubReleasePR.version);
       const latestReleaseNotes = GitHubRelease.extractLatestReleaseNotes(
         changelogContents,
-        gitHubReleasePR.version
+        // For monorepo releases, the library name is prepended to the tag and branch:
+        gitHubReleasePR.version.split('-').pop() || gitHubReleasePR.version
       );
       checkpoint(
         `found release notes: \n---\n${chalk.grey(latestReleaseNotes)}\n---\n`,
@@ -117,6 +123,14 @@ export class GitHubRelease {
     }
   }
 
+  addPath(file: string) {
+    if (this.path === undefined) {
+      return file;
+    } else {
+      return join(this.path, `./${file}`);
+    }
+  }
+
   private gitHubInstance(octokitAPIs?: OctokitAPIs): GitHub {
     const [owner, repo] = parseGithubRepoUrl(this.repoUrl);
     return new GitHub({

src/github.ts

@@ -426,8 +426,8 @@ export class GitHub {
     return refResponse.data.object.sha;
   }
 
-  async latestTag(): Promise<GitHubTag | undefined> {
-    const tags: {[version: string]: GitHubTag} = await this.allTags();
+  async latestTag(prefix?: string): Promise<GitHubTag | undefined> {
+    const tags: {[version: string]: GitHubTag} = await this.allTags(prefix);
     const versions = Object.keys(tags).filter(t => {
       // remove any pre-releases from the list:
       return !t.includes('-');
@@ -517,7 +517,9 @@ export class GitHub {
     return openReleasePRs;
   }
 
-  private async allTags(): Promise<{[version: string]: GitHubTag}> {
+  private async allTags(
+    prefix?: string
+  ): Promise<{[version: string]: GitHubTag}> {
     const tags: {[version: string]: GitHubTag} = {};
     for await (const response of this.octokit.paginate.iterator(
       this.decoratePaginateOpts({
@@ -528,8 +530,11 @@ export class GitHub {
       })
     )) {
       response.data.forEach((data: ReposListTagsResponseItems) => {
-        const version = semver.valid(data.name);
-        if (version) {
+        // For monorepos, a prefix can be provided, indicating that only tags
+        // matching the prefix should be returned:
+        if (prefix && !data.name.startsWith(prefix)) return;
+        let version = data.name.replace(prefix, '');
+        if ((version = semver.valid(version))) {
           tags[version] = {sha: data.commit.sha, name: data.name, version};
         }
       });