docs: Update getting-started-develop with comprehensive contributing guide

site/content/en/docs/getting-started-develop.md

@@ -7,12 +7,301 @@ description: >
 
 ## Contributing
 
+Thank you for your interest in contributing to Prow! This guide will help you understand how to contribute effectively.
+
 Please consider upstreaming any changes or additions you make! Contributions in any form (issues, pull requests, even constructive comments in discussions) are more than welcome!
 You can develop in-tree for more help and review, or out-of-tree if you need to for whatever reason. If you upstream a new feature or a change that impacts the default behavior of Prow, consider adding an [announcement](/docs/announcements/) about it and dropping an email at the [sig-testing](https://groups.google.com/forum/#!forum/kubernetes-sig-testing) mailing list.
 
 **New Contributors** should search for issues in kubernetes-sigs/prow with the `help-wanted` and/or `good first issue` labels. [(Query link)](https://github.com/kubernetes-sigs/prow/issues?utf8=%E2%9C%93&q=is%3Aopen+is%3Aissue+label%3A%22help+wanted%22). Before starting work please ensure that the issue is still active and then provide a short design overview of your planned solution.
 Also reach out on the Kubernetes slack in the `sig-testing` channel.
 
+## How to Contribute
+
+### 1. Fork and Clone
+
+```bash
+# Fork the repository on GitHub, then clone your fork
+git clone https://github.com/YOUR_USERNAME/prow.git
+cd prow
+
+# Add upstream remote
+git remote add upstream https://github.com/kubernetes-sigs/prow.git
+```
+
+### 2. Create a Branch
+
+```bash
+# Create a feature branch from main
+git checkout -b feature/my-feature
+
+# Or a bugfix branch
+git checkout -b fix/bug-description
+```
+
+### 3. Make Your Changes
+
+- Write clear, readable code
+- Follow Go conventions and style
+- Add tests for new functionality
+- Update documentation as needed
+
+### 4. Test Your Changes
+
+```bash
+# Run unit tests
+make test
+
+# Run linters
+make verify
+
+# Run integration tests
+go test ./test/integration/...
+```
+
+### 5. Commit Your Changes
+
+```bash
+# Stage changes
+git add .
+
+# Commit with descriptive message
+git commit -m "Add feature: description of changes"
+```
+
+**Commit Message Guidelines:**
+- Use imperative mood ("Add feature" not "Added feature")
+- Keep first line under 72 characters
+- Add detailed description if needed
+- Reference issues: "Fix #123: description"
+
+### 6. Push and Create Pull Request
+
+```bash
+# Push to your fork
+git push origin feature/my-feature
+```
+
+Then create a Pull Request on GitHub with:
+- Clear title and description
+- Reference to related issues
+- Screenshots/logs if applicable
+- Checklist of what was tested
+
+## Branching Model
+
+### Branch Naming
+
+- `feature/description` - New features
+- `fix/description` - Bug fixes
+- `docs/description` - Documentation updates
+- `refactor/description` - Code refactoring
+- `test/description` - Test improvements
+
+### Branch Strategy
+
+- **main** - Production-ready code
+- **Feature branches** - Created from main, merged back via PR
+- **Release branches** - For release-specific fixes (if needed)
+
+## Coding Standards
+
+### Go Style
+
+Follow [Effective Go](https://golang.org/doc/effective_go) and [Go Code Review Comments](https://github.com/golang/go/wiki/CodeReviewComments).
+
+**Formatting:**
+```bash
+# Use gofmt
+make update-gofmt
+
+# Or goimports (handles imports)
+goimports -w .
+```
+
+**Key Guidelines:**
+- Use `gofmt` for formatting
+- Run `goimports` to organize imports
+- Follow naming conventions
+- Keep functions focused and small
+- Add comments for exported functions/types
+
+### Code Organization
+
+- **Packages**: Group related functionality
+- **Files**: Keep files focused
+- **Tests**: `*_test.go` files alongside source
+- **Test Data**: Use `testdata/` directories
+
+### Error Handling
+
+```go
+// Good: Wrap errors with context
+if err != nil {
+    return fmt.Errorf("failed to load config: %w", err)
+}
+
+// Good: Use errors.Is and errors.As
+if errors.Is(err, os.ErrNotExist) {
+    // handle
+}
+```
+
+### Logging
+
+```go
+// Use logrus for structured logging
+import "github.com/sirupsen/logrus"
+
+logrus.WithFields(logrus.Fields{
+    "config": configPath,
+    "error": err,
+}).Error("Failed to load config")
+```
+
+### Testing
+
+**Unit Tests:**
+```go
+func TestFunction(t *testing.T) {
+    // Arrange
+    input := "test"
+
+    // Act
+    result := Function(input)
+
+    // Assert
+    if result != expected {
+        t.Errorf("Expected %v, got %v", expected, result)
+    }
+}
+```
+
+## PR Guidelines
+
+### PR Requirements
+
+1. **Description**: Clear description of what and why
+2. **Tests**: All tests pass
+3. **Linting**: Code passes linting
+4. **Documentation**: Updated if needed
+5. **Size**: Keep PRs focused and reasonably sized
+
+### PR Template
+
+```markdown
+## Description
+Brief description of changes
+
+## Problem
+What problem does this solve?
+
+## Solution
+How does this solve the problem?
+
+## Testing
+- [ ] Unit tests added/updated
+- [ ] Integration tests pass
+- [ ] Manual testing performed
+
+## Related Issues
+Fixes #123
+Related to #456
+```
+
+### Review Process
+
+1. **Automated Checks**: Must pass (tests, linting, etc.)
+2. **Code Review**: At least one approval required
+3. **LGTM**: Reviewer says `/lgtm` when satisfied
+4. **Approve**: Approver says `/approve` for final approval
+5. **Merge**: Automated merge by Tide when all conditions met
+
+## Code Review Guidelines
+
+### For Reviewers
+
+**What to Look For:**
+- Code correctness and logic
+- Test coverage
+- Error handling
+- Performance considerations
+- Security implications
+- Documentation completeness
+
+**Review Checklist:**
+- [ ] Code follows style guidelines
+- [ ] Tests are adequate
+- [ ] Error handling is proper
+- [ ] Documentation is updated
+- [ ] No security issues
+- [ ] Performance is acceptable
+
+### For Authors
+
+**Before Requesting Review:**
+- Self-review your code
+- Run all tests
+- Check linting
+- Update documentation
+- Write clear PR description
+
+**During Review:**
+- Respond promptly to comments
+- Be open to suggestions
+- Ask for clarification if needed
+- Update code based on feedback
+
+## Testing Requirements
+
+### Unit Tests
+
+- Required for new functionality
+- Aim for >80% coverage for new code
+- Test edge cases and error conditions
+
+### Integration Tests
+
+- Required for components that modify external state
+- Use test data in `test/integration/`
+- Test with real Kubernetes clusters when possible
+
+## Documentation
+
+### Code Documentation
+
+- Document exported functions/types
+- Use Go doc comments
+- Include examples for complex APIs
+
+### User Documentation
+
+- Update README.md for component changes
+- Add examples for new features
+- Update this contributing guide if process changes
+
+## Getting Help
+
+### Communication Channels
+
+- **GitHub Issues**: Bug reports and feature requests
+- **Pull Requests**: Code contributions and discussions
+- **Slack**: #sig-testing on Kubernetes Slack
+
+### Resources
+
+- [Go Documentation](https://golang.org/doc/)
+- [Kubernetes Contributing Guide](https://github.com/kubernetes/community/blob/master/contributors/guide/README.md)
+- [Prow Documentation](https://docs.prow.k8s.io/)
+
+## Code of Conduct
+
+- Be respectful and inclusive
+- Welcome newcomers
+- Focus on constructive feedback
+- Follow the [Kubernetes Code of Conduct](https://github.com/kubernetes/community/blob/master/code-of-conduct.md)
+
+Thank you for contributing to Prow! 🎉
+
 ## Prow Integration Points
 
 There are a number of ways that you can write code for Prow or integrate existing code with Prow.