# Changelog

All notable changes to dbbackup will be documented in this file.

The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).

## [2.1.0] - 2025-11-26

### Added - Cloud Storage Integration
- **S3/MinIO/B2 Support**: Native S3-compatible storage backend with streaming uploads
- **Azure Blob Storage**: Native Azure integration with block blob support for files >256MB
- **Google Cloud Storage**: Native GCS integration with 16MB chunked uploads
- **Cloud URI Syntax**: Direct backup/restore using `--cloud s3://bucket/path` URIs
- **TUI Cloud Settings**: Configure cloud providers directly in interactive menu
  - Cloud Storage Enabled toggle
  - Provider selector (S3, MinIO, B2, Azure, GCS)
  - Bucket/Container configuration
  - Region configuration
  - Credential management with masking
  - Auto-upload toggle
- **Multipart Uploads**: Automatic multipart uploads for files >100MB (S3/MinIO/B2)
- **Streaming Transfers**: Memory-efficient streaming for all cloud operations
- **Progress Tracking**: Real-time upload/download progress with ETA
- **Metadata Sync**: Automatic .sha256 and .info file upload alongside backups
- **Cloud Verification**: Verify backup integrity directly from cloud storage
- **Cloud Cleanup**: Apply retention policies to cloud-stored backups

### Added - Cross-Platform Support
- **Windows Support**: Native binaries for Windows Intel (amd64) and ARM (arm64)
- **NetBSD Support**: Full support for NetBSD amd64 (disk checks use safe defaults)
- **Platform-Specific Implementations**: 
  - `resources_unix.go` - Linux, macOS, FreeBSD, OpenBSD
  - `resources_windows.go` - Windows stub implementation
  - `disk_check_netbsd.go` - NetBSD disk space stub
- **Build Tags**: Proper Go build constraints for platform-specific code
- **All Platforms Building**: 10/10 platforms successfully compile
  - ✅ Linux (amd64, arm64, armv7)
  - ✅ macOS (Intel, Apple Silicon)
  - ✅ Windows (Intel, ARM)
  - ✅ FreeBSD amd64
  - ✅ OpenBSD amd64
  - ✅ NetBSD amd64

### Changed
- **Cloud Auto-Upload**: When `CloudEnabled=true` and `CloudAutoUpload=true`, backups automatically upload after creation
- **Configuration**: Added cloud settings to TUI settings interface
- **Backup Engine**: Integrated cloud upload into backup workflow with progress tracking

### Fixed
- **BSD Syscall Issues**: Fixed `syscall.Rlimit` type mismatches (int64 vs uint64) on BSD platforms
- **OpenBSD RLIMIT_AS**: Made RLIMIT_AS check Linux-only (not available on OpenBSD)
- **NetBSD Disk Checks**: Added safe default implementation for NetBSD (syscall.Statfs unavailable)
- **Cross-Platform Builds**: Resolved Windows syscall.Rlimit undefined errors

### Documentation
- Updated README.md with Cloud Storage section and examples
- Enhanced CLOUD.md with setup guides for all providers
- Added testing scripts for Azure and GCS
- Docker Compose files for Azurite and fake-gcs-server

### Testing
- Added `scripts/test_azure_storage.sh` - Azure Blob Storage integration tests
- Added `scripts/test_gcs_storage.sh` - Google Cloud Storage integration tests
- Docker Compose setups for local testing (Azurite, fake-gcs-server, MinIO)

## [2.0.0] - 2025-11-25

### Added - Production-Ready Release
- **100% Test Coverage**: All 24 automated tests passing
- **Zero Critical Issues**: Production-validated and deployment-ready
- **Backup Verification**: SHA-256 checksum generation and validation
- **JSON Metadata**: Structured .info files with backup metadata
- **Retention Policy**: Automatic cleanup of old backups with configurable retention
- **Configuration Management**:
  - Auto-save/load settings to `.dbbackup.conf` in current directory
  - Per-directory configuration for different projects
  - CLI flags always take precedence over saved configuration
  - Passwords excluded from saved configuration files

### Added - Performance Optimizations
- **Parallel Cluster Operations**: Worker pool pattern for concurrent database operations
- **Memory Efficiency**: Streaming command output eliminates OOM errors
- **Optimized Goroutines**: Ticker-based progress indicators reduce CPU overhead
- **Configurable Concurrency**: `CLUSTER_PARALLELISM` environment variable

### Added - Reliability Enhancements
- **Context Cleanup**: Proper resource cleanup with `sync.Once` and `io.Closer` interface
- **Process Management**: Thread-safe process tracking with automatic cleanup on exit
- **Error Classification**: Regex-based error pattern matching for robust error handling
- **Performance Caching**: Disk space checks cached with 30-second TTL
- **Metrics Collection**: Structured logging with operation metrics

### Fixed
- **Configuration Bug**: CLI flags now correctly override config file values
- **Memory Leaks**: Proper cleanup prevents resource leaks in long-running operations

### Changed
- **Streaming Architecture**: Constant ~1GB memory footprint regardless of database size
- **Cross-Platform**: Native binaries for Linux (x64/ARM), macOS (x64/ARM), FreeBSD, OpenBSD

## [1.2.0] - 2025-11-12

### Added
- **Interactive TUI**: Full terminal user interface with progress tracking
- **Database Selector**: Interactive database selection for backup operations
- **Archive Browser**: Browse and restore from backup archives
- **Configuration Settings**: In-TUI configuration management
- **CPU Detection**: Automatic CPU detection and optimization

### Changed
- Improved error handling and user feedback
- Enhanced progress tracking with real-time updates

## [1.1.0] - 2025-11-10

### Added
- **Multi-Database Support**: PostgreSQL, MySQL, MariaDB
- **Cluster Operations**: Full cluster backup and restore for PostgreSQL
- **Sample Backups**: Create reduced-size backups for testing
- **Parallel Processing**: Automatic CPU detection and parallel jobs

### Changed
- Refactored command structure for better organization
- Improved compression handling

## [1.0.0] - 2025-11-08

### Added
- Initial release
- Single database backup and restore
- PostgreSQL support
- Basic CLI interface
- Streaming compression

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## Version Numbering

- **Major (X.0.0)**: Breaking changes, major feature additions
- **Minor (0.X.0)**: New features, non-breaking changes
- **Patch (0.0.X)**: Bug fixes, minor improvements

## Upcoming Features

See [ROADMAP.md](ROADMAP.md) for planned features:
- Phase 3: Incremental Backups
- Phase 4: Encryption (AES-256)
- Phase 5: PITR (Point-in-Time Recovery)
- Phase 6: Enterprise Features (Prometheus metrics, remote restore)