Automated Changelog System - Developer Guide

This guide explains how to use the new automated changelog system for the Fabric project.

Overview

The automated changelog system allows developers to pre-process their PR changelog entries during development, which are then automatically aggregated during the release process. This eliminates manual CHANGELOG.md editing and reduces merge conflicts.

Developer Workflow

Step 1: Create Your Feature Branch and PR

Work on your feature as usual and create a pull request.

Step 2: Generate Changelog Entry

Once your PR is ready for review, generate a changelog entry:

cd cmd/generate_changelog
go build -o generate_changelog .
./generate_changelog --incoming-pr YOUR_PR_NUMBER

For example, if your PR number is 1672:

./generate_changelog --incoming-pr 1672

Step 3: Validation

The tool will validate:

• ✅ PR exists and is open
• ✅ PR is mergeable (no conflicts)
• ✅ Your working directory is clean

If any validation fails, fix the issues and try again.

Step 4: Review Generated Entry

The tool will:

1. Create ./cmd/generate_changelog/incoming/1672.txt
2. Generate an AI-enhanced summary (if --ai-summarize is enabled)
3. Auto-commit the file to your branch (use --push to also push to remote)

Review the generated file and edit if needed:

cat ./cmd/generate_changelog/incoming/1672.txt

Step 5: Include in PR

The incoming changelog entry is now part of your PR and will be reviewed along with your code changes.

Example Generated Entry

### PR [#1672](https://github.com/danielmiessler/fabric/pull/1672) by [ksylvan](https://github.com/ksylvan): Changelog Generator Enhancement

- Added automated CI/CD integration for changelog generation
- Implemented pre-processing of PR entries during development
- Enhanced caching system for better performance
- Added validation for mergeable PR states

Command Options

--incoming-pr

Pre-process a specific PR for changelog generation.

Usage: ./generate_changelog --incoming-pr PR_NUMBER

Requirements:

• PR must be open
• PR must be mergeable (no conflicts)
• Working directory must be clean (no uncommitted changes)
• GitHub token must be available (GITHUB_TOKEN env var or --token flag)

Mutual Exclusivity: Cannot be used with --process-prs flag

--incoming-dir

Specify custom directory for incoming PR files (default: ./cmd/generate_changelog/incoming).

Usage: ./generate_changelog --incoming-pr 1672 --incoming-dir ./custom/path

--process-prs

Process all incoming PR files for release aggregation. Used by CI/CD during release creation.

Usage: ./generate_changelog --process-prs {new_version_string}

Mutual Exclusivity: Cannot be used with --incoming-pr flag

--ai-summarize

Enable AI-enhanced summaries using Fabric integration.

Usage: ./generate_changelog --incoming-pr 1672 --ai-summarize

--push

Enable automatic git push after creating an incoming entry. By default, the commit is created locally but not pushed to the remote repository.

Usage: ./generate_changelog --incoming-pr 1672 --push

Note: When using --push, ensure you have proper authentication configured (SSH keys or GITHUB_TOKEN environment variable).

Troubleshooting

"PR is not open"

Your PR has been closed or merged. Only open PRs can be processed.

"PR is not mergeable"

Your PR has merge conflicts or other issues preventing it from being merged. Resolve conflicts and ensure the PR is in a mergeable state.

"Working directory is not clean"

You have uncommitted changes. Commit or stash them before running the tool.

"Failed to fetch PR"

Check your GitHub token and network connection. Ensure the PR number exists.

CI/CD Integration

The system automatically processes all incoming PR files during the release workflow. No manual intervention is required.

When a release is created:

1. All incoming/*.txt files are aggregated using --process-prs
2. Version is detected from version.nix or latest git tag
3. A new version entry is created in CHANGELOG.md
4. Incoming files are cleaned up (removed)
5. Changes are staged for the release commit (CHANGELOG.md and cache file)

Best Practices

1. Run early: Generate your changelog entry as soon as your PR is ready for review
2. Review content: Always review the generated entry and edit if necessary
3. Keep it updated: If you make significant changes to your PR, regenerate the entry
4. Use AI summaries: Enable --ai-summarize for more professional, consistent formatting

Advanced Usage

Custom GitHub Token

./generate_changelog --incoming-pr 1672 --token YOUR_GITHUB_TOKEN

Custom Repository Path

./generate_changelog --incoming-pr 1672 --repo /path/to/repo

Disable Caching

./generate_changelog --incoming-pr 1672 --no-cache

Enable Auto-Push

./generate_changelog --incoming-pr 1672 --push

This creates the commit locally and pushes it to the remote repository. By default, commits are only created locally, allowing you to review changes before pushing manually.

Authentication: The tool automatically detects GitHub repositories and uses the GITHUB_TOKEN environment variable for authentication when pushing. For SSH repositories, ensure your SSH keys are properly configured.

Integration with Existing Workflow

This system is fully backward compatible. The existing changelog generation continues to work unchanged. The new features are opt-in and only activated when using the new flags.

Support

If you encounter issues:

1. Check this documentation
2. Verify your GitHub token has appropriate permissions
3. Ensure your PR meets the validation requirements
4. Check the tool's help: ./generate_changelog --help

For bugs or feature requests, please create an issue in the repository.