Initial version of the bot (#807)

Author: cortinico

.github/workflows/react-native-bot-merger.yml

@@ -0,0 +1,33 @@
+name: Handle @react-native-bot commands
+
+on:
+  issue_comment:
+    types: [created]
+
+jobs:
+  publish-message:
+    runs-on: ubuntu-latest
+    steps:
+      # Checkout the repo
+      - name: Checkout the repo
+        uses: actions/checkout@v4
+      - name: Run React Native Bot
+        uses: actions/github-script@v5
+        env:
+          REACT_NATIVE_BOT_GITHUB_TOKEN: ${{ secrets.REACT_NATIVE_BOT_GITHUB_TOKEN }}
+        with:
+          github-token: ${{ secrets.REACT_NATIVE_BOT_GITHUB_TOKEN }}
+          script: |
+            // List of allowed GitHub users to interact with @react-native-bot
+            const allowedUsers = [
+              'cortinico',
+              'cipolleschi'
+            ];
+
+            const commentBody = context.payload.comment.body;
+            const commenterUsername = context.payload.comment.user.login;
+            
+            if (allowedUsers.includes(commenterUsername) && commentBody.includes('@react-native-bot')) {
+              const script = require('./.github/workflows/scripts/react-native-bot.js')
+              script({github, context})
+            }

.github/workflows/scripts/react-native-bot.js

@@ -0,0 +1,141 @@
+function writeComment(context, github, commentBody) {
+  github.rest.issues.createComment({
+    owner: context.repo.owner,
+    repo: context.repo.repo,
+    issue_number: context.payload.issue.number,
+    body: commentBody,
+  });
+}
+
+function handleFailure(context, github) {
+  writeComment(
+    context,
+    github,
+    "⚠️ Sorry but I couldn't understand your request."
+  );
+}
+
+function handleError(context, github, message, consoleOutput) {
+  console.log(`❌ Error: ${message}`);
+  let composedMessage = `❌ I failed to process your request with this error:\n\`\`\`\n${message}\n\`\`\``;
+  if (consoleOutput) {
+    composedMessage += `\n**console output:**\n\`\`\`\n${consoleOutput}\n\`\`\``;
+  }
+  writeComment(context, github, composedMessage);
+}
+
+// First parse the command as if it is a react-native-bot merge <SHA> <branch>
+function handleMergeCommand(context, github, commentBody) {
+  const [botName, command, sha, branch] = commentBody.trim().split(" ");
+  if (
+    botName !== "@react-native-bot" ||
+    command !== "merge" ||
+    !sha ||
+    !branch
+  ) {
+    handleFailure(context, github);
+    return;
+  }
+  const execSync = require("child_process").execSync;
+
+  const tokenSecret = process.env.REACT_NATIVE_BOT_GITHUB_TOKEN;
+
+  try {
+    console.log(`▶️ Cloning react-native repository...`);
+    execSync(
+      `git clone -b main --single-branch https://${tokenSecret}@github.com/facebook/react-native.git`,
+      {
+        stdio: "inherit",
+      }
+    );
+  } catch (error) {
+    handleError(
+      context,
+      github,
+      `Failed to clone with: ${error.status} with '${error.message}'`
+    );
+    return;
+  }
+
+  try {
+    console.log(`▶️ Checking out to the requested branch: ${branch}`);
+    execSync(`cd react-native; git fetch origin ${branch}:${branch}`, {
+      stdio: "inherit",
+    });
+    execSync(`cd react-native; git checkout ${branch}`, {
+      stdio: "inherit",
+    });
+  } catch (error) {
+    handleError(
+      context,
+      github,
+      `Failed to checkout branch ${branch} with: ${error.status} with '${error.message}'`
+    );
+    return;
+  }
+
+  try {
+    console.log(`▶️ Attempting to cherry pick: ${sha}`);
+    execSync(`git config --global user.email "[email protected]"`);
+    execSync(`git config --global user.name "React Native Bot"`);
+    execSync(`cd react-native; git cherry-pick ${sha}`, {
+      stdio: "inherit",
+    });
+  } catch (error) {
+    let consoleOutput = execSync(`cd react-native; git status`).toString();
+    console.log("Console output is ", consoleOutput);
+    handleError(
+      context,
+      github,
+      `Failed to cherry-pick ${sha} on branch ${branch} with: ${error.status} with '${error.message}'`,
+      consoleOutput
+    );
+    return;
+  }
+
+  try {
+    console.log(`▶️ Attempting to push on the remote branch: ${branch}`);
+    execSync(`cd react-native; git push origin HEAD`, {
+      stdio: "inherit",
+    });
+  } catch (error) {
+    handleError(
+      context,
+      github,
+      `Failed to push the pick on branch ${branch} with: ${error.status} with '${error.message}'`
+    );
+    return;
+  }
+
+  writeComment(
+    context,
+    github,
+    `✅ Successfully picked up your commit https://github.com/facebook/react-native/commit/${sha} on the branch https://github.com/facebook/react-native/commits/${branch}`
+  );
+
+  github.rest.issues.update({
+    owner: context.repo.owner,
+    repo: context.repo.repo,
+    issue_number: context.payload.issue.number,
+    state: "closed",
+  });
+}
+
+module.exports = ({ github, context }) => {
+  const commentBody = context.payload.comment.body;
+  if (commentBody.trim() === "@react-native-bot help") {
+    writeComment(
+      context,
+      github,
+      "ℹ️ Usage: `react-native-bot merge <SHA> <branch>`"
+    );
+  } else if (commentBody.trim().startsWith("@react-native-bot merge")) {
+    handleMergeCommand(context, github, commentBody);
+  } else {
+    writeComment(
+      context,
+      github,
+      "⚠️ Sorry, I didn't understand that. Please try again or type `@react-native-bot help` for more information."
+    );
+  }
+};