feat: add ignoreLabels option to force ignore errors

Signed-off-by: Kenji Miyake <kenji.miyake@tier4.jp>

.github/workflows/lint-pr-title-preview-ignoreLabels.yml

@@ -0,0 +1,25 @@
+name: 'Lint PR title preview (current branch, ignoreLabels enabled)'
+on:
+  pull_request:
+    types:
+      - opened
+      - edited
+      - synchronize
+
+jobs:
+  main:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+      - uses: actions/setup-node@v2
+        with:
+          node-version: 16
+      - run: yarn install
+      - run: yarn build
+      - uses: ./
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+        with:
+          ignoreLabels: |
+            bot
+            ignore-semantic-pull-request

README.md

@@ -82,6 +82,8 @@ The action works without configuration, however you can provide options for cust
           validateSingleCommitMatchesPrTitle: true
           # If you use GitHub Enterprise, you can set this to the URL of your server
           githubBaseUrl: https://github.myorg.com/api/v3
+          ignoreLabels: |
+            bot
 ```
 
 ## Event triggers

action.yml

@@ -35,3 +35,6 @@ inputs:
   githubBaseUrl:
     description: "If you use Github Enterprise, you can set this to the URL of your server (e.g. https://github.myorg.com/api/v3)"
     required: false
+  ignoreLabels:
+    description: "If specified labels are added to a PR, you can ignore the validation result. It is useful for PRs created by bots."
+    required: false

src/index.js

@@ -14,7 +14,8 @@ module.exports = async function run() {
       subjectPatternError,
       validateSingleCommit,
       validateSingleCommitMatchesPrTitle,
-      githubBaseUrl
+      githubBaseUrl,
+      ignoreLabels
     } = parseConfig();
 
     const client = github.getOctokit(process.env.GITHUB_TOKEN, {
@@ -115,6 +116,18 @@ module.exports = async function run() {
       }
     }
 
+    // Ignore errors if specified labels are added.
+    if (ignoreLabels && validationError) {
+      const label_names = pullRequest.labels.map((label) => label.name);
+      if (label_names.some((label_name) => ignoreLabels.includes(label_name))) {
+        core.info(
+          `The validation error was ignored because one of the PR label [${label_names}] was in [${ignoreLabels}].`
+        );
+        core.info(`The ignored error message is: ${validationError}`);
+        validationError = null;
+      }
+    }
+
     if (wip) {
       const newStatus =
         isWip || validationError != null ? 'pending' : 'success';

src/parseConfig.js

@@ -52,6 +52,11 @@ module.exports = function parseConfig() {
     githubBaseUrl = ConfigParser.parseString(process.env.INPUT_GITHUBBASEURL);
   }
 
+  let ignoreLabels;
+  if (process.env.INPUT_IGNORELABELS) {
+    ignoreLabels = ConfigParser.parseEnum(process.env.INPUT_IGNORELABELS);
+  }
+
   return {
     types,
     scopes,
@@ -61,6 +66,7 @@ module.exports = function parseConfig() {
     subjectPatternError,
     validateSingleCommit,
     validateSingleCommitMatchesPrTitle,
-    githubBaseUrl
+    githubBaseUrl,
+    ignoreLabels
   };
 };