README.md

Development

Outside of docs

• CONTRIBUTING.md main contributing guide
• PROCESS.md contributing process
• GitLab Development Kit (GDK) to install a development version

Styleguides

• API styleguide Use this styleguide if you are contributing to the API.
• Documentation styleguide Use this styleguide if you are contributing to documentation.
• Writing documentation
  • Distinction between general documentation and technical articles
• SQL Migration Style Guide for creating safe SQL migrations
• Testing standards and style guidelines
• UX guide for building GitLab with existing CSS styles and elements
• Frontend guidelines
• SQL guidelines for working with SQL queries
• Sidekiq guidelines for working with Sidekiq workers
• Gemfile guidelines

Process

• Generate a changelog entry with bin/changelog
• Limit conflicts with EE when developing on CE
• Code review guidelines for reviewing code and having code reviewed.
• Merge request performance guidelines for ensuring merge requests do not negatively impact GitLab performance

Backend howtos

• Architecture of GitLab
• Gotchas to avoid
• How to dump production data to staging
• Instrumentation
• Performance guidelines
• Rake tasks for development
• Shell commands in the GitLab codebase
• Sidekiq debugging
• Object state models
• Building a package for testing purposes
• Manage feature flags
• View sent emails or preview mailers

Databases

• Merge Request Checklist
• What requires downtime?
• Adding database indexes
• Post Deployment Migrations
• Foreign Keys & Associations
• Serializing Data
• Polymorphic Associations
• Single Table Inheritance
• Background Migrations
• Storing SHA1 Hashes As Binary
• Iterating Tables In Batches
• Ordering Table Columns
• Verifying Database Capabilities
• Hash Indexes
• Swapping Tables

i18n

• Internationalization for GitLab

Compliance

• Licensing for ensuring license compliance