From fae3027f30cc8d9bd3270d44ded9937f97bb4b60 Mon Sep 17 00:00:00 2001
From: Fredrik Nicol <fredrik.nicol@gmail.com>
Date: Thu, 27 Nov 2025 11:16:06 +0100
Subject: [PATCH] Add automated update workflow

---
 .github/workflows/checks.yaml |  2 +-
 .github/workflows/update.yaml | 21 ++++++++++
 update.ts                     | 76 ++++++++++++++++++++++++-----------
 3 files changed, 74 insertions(+), 25 deletions(-)
 create mode 100644 .github/workflows/update.yaml

diff --git a/.github/workflows/checks.yaml b/.github/workflows/checks.yaml
index 09d9c91..ef0f4e0 100644
--- a/.github/workflows/checks.yaml
+++ b/.github/workflows/checks.yaml
@@ -2,7 +2,7 @@ name: 'CI checks'
 
 on:
   push:
-    branches: ['*']
+    branches: ['master']
   pull_request:
     branches: ['master']
 
diff --git a/.github/workflows/update.yaml b/.github/workflows/update.yaml
new file mode 100644
index 0000000..f67281a
--- /dev/null
+++ b/.github/workflows/update.yaml
@@ -0,0 +1,21 @@
+name: 'Update types'
+
+on:
+  schedule:
+    - cron: '0 6 * * *'
+
+jobs:
+  update:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - name: Run tests
+        uses: actions/setup-node@v4
+        with:
+          node-version: 24.x
+          cache: 'npm'
+
+      - run: npm ci
+      - run: npm run update -- --auto
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
diff --git a/update.ts b/update.ts
index ed97e8c..a8305b3 100644
--- a/update.ts
+++ b/update.ts
@@ -48,12 +48,11 @@ async function update() {
 
     await writeFileAsync('./package.json', JSON.stringify(nextPackageJson, null, 2) + '\n');
     await install();
-
     await build();
 
     const [indexDtsDiff, indexFlowDiff] = [
-      await spawnAsync('git', '--no-pager', 'diff', '--color', TYPESCRIPT_FILENAME),
-      await spawnAsync('git', '--no-pager', 'diff', '--color', FLOW_FILENAME),
+      await spawnAsync('git', '--no-pager', 'diff', TYPESCRIPT_FILENAME),
+      await spawnAsync('git', '--no-pager', 'diff', FLOW_FILENAME),
     ];
 
     if (indexDtsDiff !== '' || indexFlowDiff !== '') {
@@ -61,35 +60,64 @@ async function update() {
       console.info(indexDtsDiff);
       console.info(indexFlowDiff);
 
-      const doPrepare = await questionAsync('Do you want to prepare a release for this? (y/n) ');
-
-      if (doPrepare === 'y') {
+      if (process.argv.includes('--auto')) {
         await spawnAsync('git', 'commit', '-am', 'Bump MDN');
+        await spawnAsync('git', 'push', 'origin', 'HEAD');
+
+        let body = 'Automated update of types based on the latest MDN data:';
 
-        const [major, minor, patch] = nextPackageJson.version.split('.');
-        const version = `${major}.${minor}.${Number(patch) + 1}`;
-        const tag = `v${version}`;
+        if (currentMdnDataVersion !== latestMdnDataVersion) {
+          body += `\n- ${MDN_DATA}: ${currentMdnDataVersion} → ${latestMdnDataVersion}`;
+        }
 
-        nextPackageJson.version = version;
+        if (currentMdnCompatVersion !== latestMdnCompatVersion) {
+          body += `\n- ${MDN_COMPAT}: ${currentMdnCompatVersion} → ${latestMdnCompatVersion}`;
+        }
 
-        await writeFileAsync('./package.json', JSON.stringify(nextPackageJson, null, 2) + '\n');
-        await spawnAsync('git', 'commit', '-am', tag);
-        await spawnAsync('git', 'tag', tag);
+        await spawnAsync(
+          'gh',
+          'pr',
+          'create',
+          '-B',
+          'master',
+          '-H',
+          'HEAD',
+          '--title',
+          '"Update types"',
+          '--body',
+          JSON.stringify(body),
+        );
+      } else {
+        const doPrepare = await questionAsync('Do you want to prepare a release for this? (y/n) ');
 
-        console.info(`The changes are committed and tagged with: ${tag}`);
+        if (doPrepare === 'y') {
+          await spawnAsync('git', 'commit', '-am', 'Bump MDN');
 
-        const doPush = await questionAsync('Do you want to push now? (y/n) ');
+          const [major, minor, patch] = nextPackageJson.version.split('.');
+          const version = `${major}.${minor}.${Number(patch) + 1}`;
+          const tag = `v${version}`;
 
-        if (doPush === 'y') {
-          console.info('Pushing...');
-          await spawnAsync('git', 'push', 'origin', 'HEAD', '--tags');
+          nextPackageJson.version = version;
+
+          await writeFileAsync('./package.json', JSON.stringify(nextPackageJson, null, 2) + '\n');
+          await spawnAsync('git', 'commit', '-am', tag);
+          await spawnAsync('git', 'tag', tag);
+
+          console.info(`The changes are committed and tagged with: ${tag}`);
+
+          const doPush = await questionAsync('Do you want to push now? (y/n) ');
+
+          if (doPush === 'y') {
+            console.info('Pushing...');
+            await spawnAsync('git', 'push', 'origin', 'HEAD', '--tags');
+          }
+        } else {
+          console.info('Maybe next time!');
+          console.info('Resetting...');
+          await reset();
+          console.info('Downgrading...');
+          await install(true);
         }
-      } else {
-        console.info('Maybe next time!');
-        console.info('Resetting...');
-        await reset();
-        console.info('Downgrading...');
-        await install(true);
       }
     } else {
       console.info('No changes detected!');