enhance configuration (#12, #15)

.vscode/settings.json

@@ -1,3 +1,5 @@
 {
-  "editor.formatOnSave": true
-}
+  "editor.formatOnSave": true,
+  "createTests.defaultLocationForTestFiles": "project root",
+  "createTests.testDirectoryName": "__tests__"
+}

README.md

@@ -20,6 +20,8 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: TimonVS/pr-labeler-action@v3
+        with:
+          configuration-path: .github/pr-labeler.yml # optional, .github/pr-labeler.yml is the default value
         env:
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
 ```
@@ -43,6 +45,16 @@ Then if a pull request is opened with the branch name `feature/218-add-emoji-sup
 
 You can use `*` as a wildcard for matching multiple branch names. See https://www.npmjs.com/package/matcher for more information about wildcard options.
 
+### Default configuration
+
+When no configuration is provided, the following defaults will be used:
+
+```yml
+feature: ['feature/*', 'feat/*'],
+fix: 'fix/*',
+chore: 'chore/*'
+```
+
 ## Contributors ✨
 
 Thanks goes to these wonderful people ([emoji key](https://allcontributors.org/docs/en/emoji-key)):

__tests__/action.test.ts

@@ -6,6 +6,12 @@ import action from '../src/action'
 nock.disableNetConnect()
 
 describe('pr-labeler-action', () => {
+  beforeEach(() => {
+    // configuration-path parameter is required
+    // parameters are exposed as environment variables: https://help.github.com/en/github/automating-your-workflow-with-github-actions/workflow-syntax-for-github-actions#jobsjob_idstepswith
+    process.env['INPUT_CONFIGURATION-PATH'] = '.github/pr-labeler.yml'
+  })
+
   it('adds the "fix" label for "fix/510-logging" branch', async () => {
     nock('https://api.github.com')
       .get('/repos/Codertocat/Hello-World/contents/.github/pr-labeler.yml?ref=fix%2F510-logging')
@@ -30,7 +36,7 @@ describe('pr-labeler-action', () => {
       .reply(200, configFixture())
       .post('/repos/Codertocat/Hello-World/issues/1/labels', body => {
         expect(body).toMatchObject({
-          labels: ['feature']
+          labels: ['🎉 feature']
         })
         return true
       })
@@ -42,6 +48,24 @@ describe('pr-labeler-action', () => {
     expect.assertions(1)
   })
 
+  it('adds the "release" label for "release/2.0" branch', async () => {
+    nock('https://api.github.com')
+      .get('/repos/Codertocat/Hello-World/contents/.github/pr-labeler.yml?ref=release%2F2.0')
+      .reply(200, configFixture())
+      .post('/repos/Codertocat/Hello-World/issues/1/labels', body => {
+        expect(body).toMatchObject({
+          labels: ['release']
+        })
+        return true
+      })
+      .reply(200)
+
+    await action({
+      payload: pullRequestOpenedFixture({ ref: 'release/2.0' })
+    })
+    expect.assertions(1)
+  })
+
   it('uses the default config when no config was provided', async () => {
     nock('https://api.github.com')
       .get('/repos/Codertocat/Hello-World/contents/.github/pr-labeler.yml?ref=fix%2F510-logging')

__tests__/fixtures/config.yml

@@ -1,3 +1,4 @@
-feature: ['feature/*', 'feat/*']
+'🎉 feature': ['feature/*', 'feat/*']
 fix: fix/*
 chore: chore/*
+release: release/*

__tests__/utils/config.test.ts

@@ -0,0 +1,31 @@
+import getConfig from '../../src/utils/config'
+
+describe('getConfig', () => {
+  it('returns default config when GitHub returns a 404 for given path', async () => {
+    const defaultConfig = {
+      foo: 'bar'
+    }
+
+    const githubMock = {
+      repos: {
+        getContents() {
+          throw new HTTPError(404)
+        }
+      }
+    }
+
+    const config = await getConfig(
+      githubMock as any,
+      'path/to/config',
+      { owner: 'repo-owner', repo: 'repo-name' },
+      'ref',
+      defaultConfig
+    )
+
+    expect(config).toBe(defaultConfig)
+  })
+})
+
+class HTTPError {
+  constructor(public status: number) {}
+}

action.yml

@@ -1,6 +1,10 @@
 name: 'PR Labeler'
 description: 'Automatically labels your PRs based on branch name patterns like feature/* or fix/*.'
 author: 'Timon van Spronsen'
+inputs:
+  configuration-path:
+    description: 'The path for the label configurations'
+    default: '.github/pr-labeler.yml'
 branding:
   icon: 'tag'
   color: 'white'

src/action.ts

@@ -5,8 +5,7 @@ import matcher from 'matcher'
 import getConfig from './utils/config'
 import { RepoInfo } from './utils/config'
 
-const CONFIG_FILENAME = 'pr-labeler.yml'
-const defaults = {
+const defaultConfig = {
   feature: ['feature/*', 'feat/*'],
   fix: 'fix/*',
   chore: 'chore/*'
@@ -20,6 +19,7 @@ async function action(context: Pick<Context, 'payload'> = github.context) {
       owner: context.payload.repository!.owner.login,
       repo: context.payload.repository!.name
     }
+    const configPath = core.getInput('configuration-path', { required: true })
 
     if (!context.payload.pull_request) {
       throw new Error(
@@ -28,22 +28,22 @@ async function action(context: Pick<Context, 'payload'> = github.context) {
     }
 
     const ref: string = context.payload.pull_request.head.ref
-    const config = {
-      ...defaults,
-      ...(await getConfig(octokit, CONFIG_FILENAME, repoInfo, ref))
-    }
+    const config = await getConfig(octokit, configPath, repoInfo, ref, defaultConfig)
 
-    const labelsToAdd = Object.entries(config).reduce((labels: string[], [label, patterns]) => {
-      if (
-        Array.isArray(patterns)
-          ? patterns.some(pattern => matcher.isMatch(ref, pattern))
-          : matcher.isMatch(ref, patterns)
-      ) {
-        labels.push(label)
-      }
+    const labelsToAdd = Object.entries(config).reduce(
+      (labels, [label, patterns]) => {
+        if (
+          Array.isArray(patterns)
+            ? patterns.some(pattern => matcher.isMatch(ref, pattern))
+            : matcher.isMatch(ref, patterns)
+        ) {
+          labels.push(label)
+        }
 
-      return labels
-    }, [])
+        return labels
+      },
+      [] as string[]
+    )
 
     if (labelsToAdd.length > 0) {
       await octokit.issues.addLabels({

src/utils/config.ts

@@ -1,26 +1,34 @@
-import path from 'path'
 import yaml from 'js-yaml'
 import { GitHub } from '@actions/github'
-const CONFIG_PATH = '.github'
 
 export interface RepoInfo {
   owner: string
   repo: string
 }
 
-export default async function getConfig(github: GitHub, fileName: string, { owner, repo }: RepoInfo, ref: string) {
+interface Config {
+  [k: string]: string | string[]
+}
+
+export default async function getConfig(
+  github: GitHub,
+  path: string,
+  { owner, repo }: RepoInfo,
+  ref: string,
+  defaultConfig: Config
+): Promise<Config> {
   try {
     const response = await github.repos.getContents({
       owner,
       repo,
-      path: path.posix.join(CONFIG_PATH, fileName),
+      path,
       ref
     })
 
     return parseConfig(response.data.content)
   } catch (error) {
     if (error.status === 404) {
-      return null
+      return defaultConfig
     }
 
     throw error