Add a automatic PR-revert utility for failing buildbots

Signed-off-by: Pablo Galindo <[email protected]>

buildbothammer/README.md

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+# BuildbotHammer
+
+This app automatically creates revert Pull Requests for failing builds in the
+CPython project. It monitors Buildbot for failing builds, identifies the
+commit that caused the failure, and creates a revert PR on GitHub. It also sends
+notifications to Discord.
+
+## Prerequisites
+
+- Python 3.11+
+- Git
+- A GitHub account with fork of the CPython repository
+- A Discord server with webhook set up (for notifications)
+
+## Installation
+
+1. Clone this repository:
+   ```
+   git clone https://github.com/python/buildmasterconf.git
+   cd buildmasterconf/buildbot-hammer
+   ```
+
+2. Install the required Python packages:
+   ```
+   pip install -e .
+   ```
+
+3. Set up environment variables:
+   ```
+   export GITHUB_TOKEN="your-github-personal-access-token"
+   export DISCORD_WEBHOOK_URL="your-discord-webhook-url"
+   ```
+
+4. Update the script with your GitHub username:
+   Open the script and replace `FORK_OWNER` variable with your GitHub username.
+
+5. (Optional) Update the `REPO_CLONE_DIR` path if you want to use a different location for the local CPython clone.
+
+## Usage
+
+Run the script with:
+
+```
+python -m buildbothammer
+```
+
+The script will:
+1. Check Buildbot for failing builds
+2. For each failing build, it will:
+   - Identify the commit that caused the failure
+   - Create a new branch in your fork
+   - Revert the problematic commit
+   - Create a Pull Request to the main CPython repository
+   - Send a notification to the configured Discord channel
+
+## Configuration
+
+- `BUILDBOT_API`: The Buildbot API endpoint (default: "http://buildbot.python.org/api/v2")
+- `BUILDBOT_URL`: The Buildbot URL for generating links (default: "http://buildbot.python.org/#/")
+- `REPO_OWNER`: The owner of the main repository (default: "python")
+- `REPO_NAME`: The name of the repository (default: "cpython")
+- `FORK_OWNER`: Your GitHub username (default: "$REPO_OWNER")
+- `REPO_CLONE_DIR`: The directory for the local clone of the repository

buildbothammer/pyproject.toml

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+[project]
+name = "buildbothammer"
+version = "0.1.0"
+description = "Automatic revert failing CPython PRs"
+readme = "README.md"
+requires-python = ">=3.12"
+dependencies = [
+    "requests>=2.32.3",
+    "pygithub>=2.4.0",
+    "filelock>=3.16.1",
+    "aiohttp",
+]
+
+[build-system]
+requires = ["hatchling"]
+build-backend = "hatchling.build"