graphql · IvanGoncharov · Jul 7, 2021 · Jun 30, 2021
diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
@@ -209,6 +209,30 @@ jobs:
       - name: Run Benchmark
         run: 'npm run benchmark -- --revs HEAD HEAD~1'
 
+  diff-npm-package:
+    name: Diff content of NPM package
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout repo
+        uses: actions/checkout@v2
+        with:
+          fetch-depth: 2
+
+      - name: Setup Node.js
+        uses: actions/setup-node@v2
+        with:
+          node-version: ${{ env.NODE_VERSION_USED_FOR_DEVELOPMENT }}
+
+      - name: Generate report
+        run: 'node resources/diff-npm-package.js ${{ github.event.pull_request.base.sha }} HEAD'
+
+      - name: Upload generated report
+        uses: actions/upload-artifact@v2
+        with:
+          name: npm-dist-diff.html
+          path: ./npm-dist-diff.html
+          if-no-files-found: ignore
+
   deploy-to-npm-branch:
     name: Deploy to `npm` branch
     runs-on: ubuntu-latest

diff --git a/.gitignore b/.gitignore
@@ -5,6 +5,7 @@
 # https://help.github.com/articles/ignoring-files/#create-a-global-gitignore
 # https://www.gitignore.io/
 
+/diff-npm-package.html
 /.eslintcache
 /node_modules
 /coverage

diff --git a/.prettierignore b/.prettierignore
@@ -1,4 +1,5 @@
 # Copied from '.gitignore', please keep it in sync.
+/diff-npm-package.html
 /.eslintcache
 /node_modules
 /coverage

diff --git a/cspell.yml b/cspell.yml
@@ -1,6 +1,7 @@
 language: en
 ignorePaths:
   # Copied from '.gitignore', please keep it in sync.
+  - diff-npm-package.html
   - .eslintcache
   - node_modules
   - coverage

diff --git a/resources/diff-npm-package.js b/resources/diff-npm-package.js
@@ -0,0 +1,104 @@
+'use strict';
+
+const os = require('os');
+const fs = require('fs');
+const path = require('path');
+const cp = require('child_process');
+
+const LOCAL = 'local';
+const localRepoDir = path.join(__dirname, '..');
+const tmpDir = path.join(os.tmpdir(), 'graphql-js-npm-diff');
+fs.rmSync(tmpDir, { recursive: true, force: true });
+fs.mkdirSync(tmpDir);
+
+const args = process.argv.slice(2);
+let [fromRevision, toRevision] = args;
+if (args.length < 2) {
+  fromRevision = fromRevision ?? 'HEAD';
+  toRevision = toRevision ?? LOCAL;
+  console.warn(
+    `Assuming you meant: diff-npm-package ${fromRevision} ${toRevision}`,
+  );
+}
+
+console.log(`📦 Building NPM package for ${fromRevision}...`);
+const fromPackage = prepareNPMPackage(fromRevision);
+
+console.log(`📦 Building NPM package for ${toRevision}...`);
+const toPackage = prepareNPMPackage(toRevision);
+
+console.log('➖➕ Generating diff...');
+const diff = exec(`npm diff --diff=${fromPackage} --diff=${toPackage}`);
+
+if (diff === '') {
+  console.log('No changes found!');
+} else {
+  const reportPath = path.join(localRepoDir, 'npm-dist-diff.html');
+  fs.writeFileSync(reportPath, generateReport(diff), 'utf-8');
+  console.log('Report saved to: ', reportPath);
+}
+
+function generateReport(diffString) {
+  return `
+    <!DOCTYPE html>
+    <html lang="en-us">
+      <head>
+        <meta charset="utf-8" />
+        <!-- Make sure to load the highlight.js CSS file before the Diff2Html CSS file -->
+        <link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/highlight.js/10.7.1/styles/github.min.css" />
+        <link
+          rel="stylesheet"
+          type="text/css"
+          href="https://cdn.jsdelivr.net/npm/diff2html/bundles/css/diff2html.min.css"
+        />
+        <script type="text/javascript" src="https://cdn.jsdelivr.net/npm/diff2html/bundles/js/diff2html-ui.min.js"></script>
+      </head>
+      <script>
+        const diffString = ${JSON.stringify(diffString)};
+
+        document.addEventListener('DOMContentLoaded', () => {
+          const targetElement = document.getElementById('myDiffElement');
+          const configuration = {
+            drawFileList: true,
+            fileContentToggle: true,
+            matching: 'lines',
+            outputFormat: 'side-by-side',
+            renderNothingWhenEmpty: false,
+          };
+          const diff2htmlUi = new Diff2HtmlUI(targetElement, diffString, configuration);
+          diff2htmlUi.draw();
+          diff2htmlUi.highlightCode();
+        });
+      </script>
+      <body>
+        <div id="myDiffElement"></div>
+      </body>
+    </html>
+  `;
+}
+function prepareNPMPackage(revision) {
+  if (revision === LOCAL) {
+    exec('npm --quiet run build:npm', { cwd: localRepoDir });
+    return path.join(localRepoDir, 'npmDist');
+  }
+
+  // Returns the complete git hash for a given git revision reference.
+  const hash = exec(`git rev-parse "${revision}"`);
+
+  const repoDir = path.join(tmpDir, hash);
+  fs.rmSync(repoDir, { recursive: true, force: true });
+  fs.mkdirSync(repoDir);
+  exec(`git archive "${hash}" | tar -xC "${repoDir}"`);
+  exec('npm --quiet ci', { cwd: repoDir });
+  exec('npm --quiet run build:npm', { cwd: repoDir });
+  return path.join(repoDir, 'npmDist');
+}
+
+function exec(command, options = {}) {
+  const result = cp.execSync(command, {
+    encoding: 'utf-8',
+    stdio: ['inherit', 'pipe', 'inherit'],
+    ...options,
+  });
+  return result?.trimEnd();
+}