add Github Action to build project

Author: livetocode

.github/workflows/build.yaml

@@ -0,0 +1,24 @@
+
+name: Build
+on:
+  push:
+    branches:
+      - main
+  pull_request:
+    types: [opened, synchronize, reopened]
+jobs:
+  sonarcloud:
+    name: Run unit tests
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+        with:
+          fetch-depth: 0  # Shallow clones should be disabled for a better relevancy of analysis
+      - name: Use Node.js
+        uses: actions/setup-node@v1
+        with:
+          node-version: '18.x'
+      - run: npm ci
+      - run: npm test
+        env:
+          CI: true

.github/workflows/npm-publish.yml

@@ -0,0 +1,34 @@
+# This workflow will run tests using node and then publish a package to GitHub Packages when a release is created
+# For more information see: https://help.github.com/actions/language-and-framework-guides/publishing-nodejs-packages
+
+name: Node.js Package
+
+on:
+  release:
+    types: [created]
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+      - uses: actions/setup-node@v2
+        with:
+          node-version: 18
+      - run: npm ci
+      - run: npm test
+
+  publish-npm:
+    needs: build
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+      - uses: actions/setup-node@v2
+        with:
+          node-version: 18
+          registry-url: https://registry.npmjs.org/
+      - run: npm ci
+      - run: npm run compile
+      - run: npm publish --access=public
+        env:
+          NODE_AUTH_TOKEN: ${{secrets.NPM_TOKEN}}

src/differ.ts

@@ -618,7 +618,6 @@ export class DifferContext {
     }
 
     private async getNextPair():Promise<RowPair> {
-        // TODO: parallelize
         const oldRow = await this.getNextOldRow();
         const newRow = await this.getNextNewRow();
         return { oldRow, newRow };