feat: add input for the config repository

README.md

@@ -70,6 +70,7 @@ jobs:
         with:
           github-token: ${{secrets.GITHUB_TOKEN}} # optional, default to '${{ github.token }}'  
           config-path: .github/labeler.yml # optional, default to '.github/labeler.yml'
+          config-repo: my-org/my-repo # optional, default to '${{ github.repository }}'
 ```
 
 #### `.github/labeler.yml`
@@ -288,7 +289,10 @@ labels:
 ## Configuration
 
 Once you’ve added multi-labeler to your repository, it must be enabled by adding a `.github/labeler.yml` configuration
-file to the repository.
+file to the repository. If you want to use a configuration file shared across multiple repositories, you can set the
+`config-repo` input to point to a different repository. However, make sure to set a `github-token` that has permissions
+to access the provided repository, as the default `GITHUB_TOKEN` only has access to the repository the action is 
+running in.
 
 ## Matchers
 

__tests__/checks.test.ts

@@ -25,7 +25,7 @@ async function runChecks(
   configPath: string,
   labels: string[]
 ): Promise<StatusCheck[]> {
-  const config = await getConfig(client, configPath)
+  const config = await getConfig(client, configPath, 'owner-name/repo-name')
   return checks(client, config, labels)
 }
 

__tests__/labeler.test.ts

@@ -44,7 +44,7 @@ const client: InstanceType<typeof GitHub> = {
 }
 
 async function runLabels(configPath: string): Promise<string[]> {
-  const config = await getConfig(client, configPath)
+  const config = await getConfig(client, configPath, 'owner-name/repo-name')
   return labels(client, config)
 }
 

action.yml

@@ -10,6 +10,10 @@ inputs:
     description: 'The path for the label configurations'
     default: '.github/labeler.yml'
     required: false
+  config-repo:
+    description: 'The repository for the label configurations'
+    default: ${{ github.repository }}
+    required: false
   github-token:
     description: 'GITHUB_TOKEN or a `repo` scoped Personal Access Token (PAT)'
     required: false

src/config.ts

@@ -89,12 +89,17 @@ export function parse(content: string): Config {
 
 export async function getConfig(
   client: InstanceType<typeof GitHub>,
-  configPath: string
+  configPath: string,
+  configRepo: string
 ): Promise<Config> {
+  const [owner, repo] = configRepo.split('/')
   const response: any = await client.repos.getContent({
-    owner: github.context.repo.owner,
-    repo: github.context.repo.repo,
-    ref: github.context.sha,
+    owner,
+    repo,
+    ref:
+      configRepo === github.context.payload.repository?.full_name
+        ? github.context.sha
+        : undefined,
     path: configPath
   })
 

src/main.ts

@@ -6,6 +6,7 @@ import {checks, StatusCheck} from './checks'
 
 const githubToken = core.getInput('github-token')
 const configPath = core.getInput('config-path', {required: true})
+const configRepo = core.getInput('config-repo')
 
 const client = github.getOctokit(githubToken)
 const payload =
@@ -87,7 +88,7 @@ async function addChecks(checks: StatusCheck[]): Promise<void> {
   ])
 }
 
-getConfig(client, configPath)
+getConfig(client, configPath, configRepo)
   .then(async config => {
     const labeled = await labels(client, config)
     const finalLabels = mergeLabels(labeled, config)