n8n Workflow: GitHub Repository Sync

This n8n workflow provides a robust framework for synchronizing data related to GitHub repositories. It is designed to be a modular and extensible solution, allowing for various operations on GitHub data to be integrated and executed.

What it does

This workflow acts as a dispatcher, taking an input (likely from another workflow or a manual trigger) and processing it based on a defined operation. While the specific "operations" are not fully defined in this base workflow, it sets up the structure for handling different types of GitHub-related tasks.

Here's a breakdown of its key steps:

1. Trigger: The workflow can be initiated either manually, on a schedule, or by being called as a sub-workflow from another n8n workflow.
2. Edit Fields (Set): It prepares the incoming data by setting or modifying fields, likely to standardize the input for subsequent operations.
3. Code: Executes custom JavaScript code, potentially for advanced data manipulation or validation before routing.
4. Switch: This is the core routing mechanism. It evaluates a condition (likely an operation field in the incoming data) and directs the flow to different branches based on the value.
5. No Operation, do nothing: This node serves as a placeholder or a default path for the Switch node, indicating that no specific action is taken for certain operation values.
6. Execute Sub-workflow: This node is designed to call other n8n workflows, allowing for modularity and reuse of logic. Each branch of the Switch node can trigger a different sub-workflow to handle specific GitHub operations (e.g., "create issue", "update pull request", "list repositories").
7. Merge: After individual sub-workflow executions, this node merges the results back together, ensuring a unified output from the overall process.
8. Loop Over Items (Split in Batches): This node suggests that the workflow might process multiple items (e.g., multiple repositories or issues) in batches, allowing for efficient handling of large datasets.
9. Split Out: This node is typically used to flatten nested data structures or to process individual items from an array, ensuring each item is handled separately if needed.
10. HTTP Request: This node is the primary way the workflow interacts with external APIs, specifically the GitHub API, to perform actions like fetching data or making changes.
11. If: This node provides conditional logic, allowing the workflow to make decisions based on data values at various points in the flow.

Prerequisites/Requirements

• n8n Instance: A running n8n instance to host and execute the workflow.
• GitHub Account: Access to a GitHub account and a Personal Access Token (PAT) with appropriate permissions for the repositories you intend to interact with.
• n8n GitHub Credential: A configured GitHub credential within n8n to authenticate HTTP requests to the GitHub API.
• Sub-workflows (Optional but Recommended): This workflow is designed to call other sub-workflows for specific GitHub operations. You will need to create and configure these sub-workflows based on your specific use cases.

Setup/Usage

1. Import the Workflow: Import the provided JSON into your n8n instance.
2. Configure Credentials:
   • Add a new GitHub credential in n8n if you don't have one already. This credential will be used by the "GitHub" node.
   • Ensure any HTTP Request nodes that interact with the GitHub API are configured to use this GitHub credential or an appropriate API key/token.
3. Define Sub-workflows: Create and configure the sub-workflows that this main workflow will execute (e.g., workflows for creating issues, listing repositories, etc.). The Execute Sub-workflow nodes will need to be configured with the IDs of these sub-workflows.
4. Configure the Trigger:
   • If using the Manual Trigger, simply click "Execute Workflow" to run it.
   • If using the Schedule Trigger, configure the desired interval for automatic execution.
   • If using the Execute Workflow Trigger, ensure another workflow is set up to call this workflow and pass the necessary input data, including the operation field for routing.
5. Customize the Logic:
   • Edit Fields (Set) and Code nodes can be modified to transform input data as needed.
   • Switch node: Adjust the conditions to match the operation values you expect and add or modify branches to call different sub-workflows or perform unique actions.
   • HTTP Request nodes: Configure the specific GitHub API endpoints, methods, and body data for your desired operations.
   • If nodes: Add or modify conditions to introduce more complex decision-making.
6. Activate the Workflow: Once configured, activate the workflow to enable its scheduled or triggered execution.