Meta: Add action to tweet each commit on push

.github/workflows/twitter.yml

@@ -0,0 +1,24 @@
+name: Twitter notifications
+
+on: [ push ]
+
+jobs:
+  notify_twitter:
+    runs-on: ubuntu-20.04
+    if: always() && github.repository == 'SerenityOS/serenity' && github.ref == 'refs/heads/master'
+
+    steps:
+      - uses: actions/checkout@v2
+      - uses: actions/setup-node@v2
+        with:
+          node_version: '14'
+      - run: npm i twit
+      - run: |
+          node ${{ github.workspace }}/Meta/tweet-commits.js << EOF
+          ${{ toJSON(github.event) }}
+          EOF
+        env:
+          CONSUMER_KEY: ${{ secrets.CONSUMER_KEY }}
+          CONSUMER_SECRET: ${{ secrets.CONSUMER_SECRET }}
+          ACCESS_TOKEN: ${{ secrets.ACCESS_TOKEN }}
+          ACCESS_TOKEN_SECRET: ${{ secrets.ACCESS_TOKEN_SECRET }}

Meta/tweet-commits.js

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+const fs = require("fs");
+const Twit = require("twit");
+const { CONSUMER_KEY, CONSUMER_SECRET, ACCESS_TOKEN, ACCESS_TOKEN_SECRET } = process.env;
+
+const T = new Twit({
+    consumer_key: CONSUMER_KEY,
+    consumer_secret: CONSUMER_SECRET,
+    access_token: ACCESS_TOKEN,
+    access_token_secret: ACCESS_TOKEN_SECRET,
+});
+
+(async () => {
+    const githubEvent = JSON.parse(fs.readFileSync(0).toString());
+    const tweets = [];
+    for (const commit of githubEvent["commits"]) {
+        tweets.push(
+            `${commit["message"].substring(0, 240)}\nAuthor: ${commit["author"]["name"]}\n${
+                commit["url"]
+            }`
+        );
+    }
+    for (const tweet of tweets) {
+        try {
+            await T.post("statuses/update", { status: tweet });
+        } catch (e) {
+            console.error("Failed to post a tweet!", e.message);
+        }
+    }
+})();