[Issue #4] Retrigger action on PR update (#10)

.github/workflows/main.yml

@@ -1,6 +1,8 @@
 name: main
 # This workflow is triggered on pushes to the repository.
-on: [pull_request]
+on:
+  pull_request:
+    types: [opened, edited, synchronize, reopened]
 
 jobs:
   build:
@@ -15,4 +17,6 @@ jobs:
           node-version: '10.x'      # This step prints an output (time) from the previous step's action.
       - run: npm install
       - name: Validate
-        run: node index.js
+        uses: ./
+        with:
+          github_token: ${{ github.token }}

Readme.md

@@ -12,11 +12,25 @@ steps:
 - uses: deepakputhraya/action-pr-title@master
   with:
     regex: '([a-z])+\/([a-z])+' # Regex the title should match.
-    allowed_prefixes: 'feature,stable,fix' # title should start with the given prefix
+    allowed_prefixes: 'feature,fix,JIRA' # title should start with the given prefix
+    disallowed_prefixes: 'feat/,hotfix' # title should not start with the given prefix
     prefix_case_sensitive: false # title prefix are case insensitive
     min_length: 5 # Min length of the title
     max_length: 20 # Max length of the title
+    github_token: ${{ github.token }} # Default: ${{ github.token }}
 ```
 
+### Note:
+Ensure to add `types` to the Pull requests webhook event as by default workflows are triggered only 
+for `opened`, `synchronize`, or `reopened` pull request events. Read more about 
+it [here](https://docs.github.com/en/free-pro-team@latest/actions/reference/events-that-trigger-workflows#pull_request). 
+```yaml
+on:
+  pull_request:
+    types: [opened, edited, synchronize, reopened]
+```
+
+Triggering the action on anything other than `pull_request` will cause a failure.
+
 ## License
 The scripts and documentation in this project are released under the [MIT License](./LICENSE)

action.yml

@@ -26,6 +26,15 @@ inputs:
     description: 'Max length of title. -1 to ignore the rule'
     required: false
     default: '-1'
+  github_token:
+    description: >
+      Personal access token (PAT) used to fetch the repository. The PAT is configured
+      with the local git config, which enables your scripts to run authenticated git
+      commands. The post-job step removes the PAT.
+      We recommend using a service account with the least permissions necessary.
+      Also when generating a new PAT, select the least scopes necessary.
+    required: false
+    default: ${{ github.token }}
 
 runs:
   using: 'node12'

index.js

@@ -13,14 +13,30 @@ function validateTitlePrefix(title, prefix, caseSensitive) {
 
 async function run() {
     try {
+        const authToken = core.getInput('github_token', {required: true})
         const eventName = github.context.eventName;
         core.info(`Event name: ${eventName}`);
         if (validEvent.indexOf(eventName) < 0) {
             core.setFailed(`Invalid event: ${eventName}`);
             return;
         }
 
-        const title = github.context.payload.pull_request.title;
+        const owner = github.context.payload.pull_request.base.user.login;
+        const repo = github.context.payload.pull_request.base.repo.name;
+
+        const client = new github.GitHub(authToken);
+        // The pull request info on the context isn't up to date. When
+        // the user updates the title and re-runs the workflow, it would
+        // be outdated. Therefore fetch the pull request via the REST API
+        // to ensure we use the current title.
+        const {data: pullRequest} = await client.pulls.get({
+          owner,
+          repo,
+          pull_number: github.context.payload.pull_request.number
+        });
+
+        const title = pullRequest.title;
+
         core.info(`Pull Request title: "${title}"`);
 
         // Check if title pass regex