feat(config): add 'extends' configuration option

.github/workflows/ci.yml

@@ -1,11 +1,8 @@
 name: CI
-
-on:
-  pull_request:
-  push:
-
+"on":
+  pull_request: null
+  push: null
 jobs:
-
   build:
     runs-on: ${{ matrix.os }}
     strategy:
@@ -16,25 +13,23 @@ jobs:
           - 14
           - 16
           - 17
-        os: [ubuntu-latest, macos-latest, windows-latest]
-
+        os:
+          - ubuntu-latest
+          - macos-latest
+          - windows-latest
     steps:
       - name: 🛑 Cancel Previous Runs
         uses: styfle/cancel-workflow-action@0.9.1
         with:
           access_token: ${{ secrets.GITHUB_TOKEN }}
-
       - name: ⬇️ Checkout
-        uses: actions/checkout@v2
-
+        uses: actions/checkout@v3
       - name: ⎔ Setup node ${{ matrix.node }}
-        uses: actions/setup-node@v2
+        uses: actions/setup-node@v3
         with:
           node-version: ${{ matrix.node }}
           cache: npm
-
       - name: 📥 Download deps
         run: npm ci
-
       - name: Test
         run: npm test

index.js

@@ -3,6 +3,7 @@
 var engine = require('./engine');
 var conventionalCommitTypes = require('conventional-commit-types');
 var configLoader = require('commitizen').configLoader;
+var merge = require('lodash.merge');
 
 var config = configLoader.load() || {};
 var options = {
@@ -28,6 +29,13 @@ var options = {
     100
 };
 
+if (!!config.extends) {
+  options = merge(
+    options,
+    typeof config.extends == 'string' ? require(config.extends) : config.extends
+  );
+}
+
 (function(options) {
   try {
     var commitlintLoad = require('@commitlint/load');

package.json

@@ -25,6 +25,7 @@
     "commitizen": "^4.0.3",
     "conventional-commit-types": "^3.0.0",
     "lodash.map": "^4.5.1",
+    "lodash.merge": "^4.6.2",
     "longest": "^2.0.1",
     "word-wrap": "^1.0.3"
   },