Use checkout v4 to silence node16 deprecation warnings

.github/workflows/test.yml

@@ -1,11 +1,18 @@
 name: "test"
-on: push
+on:
+  push:
+    branches: [ master ]
+  pull_request:
+    branches: [ master ]
+
+  # allow running manually
+  workflow_dispatch:
 
 jobs:
   test:
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v1
+    - uses: actions/checkout@v4
     - run: npm ci
     - uses: ./
     - run: echo $BRANCH_NAME

.gitignore

@@ -2,6 +2,7 @@ node_modules/
 
 # Editors
 .vscode
+.idea
 
 # Logs
 logs

README.md

@@ -11,7 +11,7 @@ jobs:
   build:
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v1
+    - uses: actions/checkout@v4
     - run: npm ci
     - uses: nelonoel/[email protected]
     # Use branch name for whatever purpose

action.yml

@@ -4,5 +4,5 @@ branding:
   icon: 'git-branch'
   color: 'blue'
 runs:
-  using: 'node12'
+  using: 'node20'
   main: 'dist/index.js'

index.js

@@ -2,7 +2,15 @@ const core = require('@actions/core');
 
 async function run() {
   try {
-    core.exportVariable('BRANCH_NAME', process.env.GITHUB_REF.split('/').slice(2).join('/'));
+    const event = JSON.parse( readFileSync( GITHUB_EVENT_PATH, 'utf8' ) );
+		const isPullRequest = !! event.pull_request;
+    let branchName;
+    if ( this.isPullRequest ) {
+      branchName = event.pull_request.head.ref;
+    } else {
+      branchName = event.ref.substr( 11 );
+    }
+    core.exportVariable('BRANCH_NAME', branchName);
   }
   catch (error) {
     core.setFailed(error.message);

package.json

@@ -24,7 +24,7 @@
   },
   "homepage": "https://github.com/nelonoel/branch-name#readme",
   "dependencies": {
-    "@actions/core": "^1.2.6"
+    "@actions/core": "^1.9.1"
   },
   "devDependencies": {
     "@zeit/ncc": "^0.20.5",