apt-ostree/.notes/development_phases.md

APT-OSTree Development Phases

🎯 Project Overview

APT-OSTree is a 1:1 CLI-compatible alternative to rpm-ostree using APT package management.

✅ Completed Development Phases (8/8 - 100% Complete)

Phase 1: Core Infrastructure ✅

• Research rpm-ostree architecture and libdnf integration
• Research libapt-pkg API and DEB package handling
• Create project structure and build system
• Implement basic Rust CLI with command structure
• Create APT manager module for package operations
• Create OSTree manager module for deployment operations
• Implement basic system integration module

Phase 2: CLI Commands ✅

• Implement all core CLI commands
• Add dry-run support for all operations
• Fix APT FFI safety issues and segfaults
• Test basic CLI functionality

Phase 3: Daemon Architecture ✅

• Design daemon/client architecture
• Implement systemd service (apt-ostreed.service)
• Create D-Bus interface definition
• Implement daemon main process
• Create client library for D-Bus communication
• Add D-Bus service activation support
• Implement D-Bus policy file
• Test D-Bus communication between client and daemon

Phase 4: Real Package Management Integration ✅

• Expand D-Bus interface with real methods
• Wire up CLI commands to use daemon
• Add fallback to direct system calls if daemon fails
• Implement real APT integration for all operations

Phase 5: Critical APT-OSTree Integration Nuances ✅

• APT Database Management in OSTree Context
• Bubblewrap Integration for Script Sandboxing
• OSTree Commit Management
• Filesystem Assembly
• Dependency Resolution
• Script Execution

Phase 6: Package Management Integration ✅

• Package Manager Integration Module
• Real Package Installation Flow
• Package Removal Flow
• Transaction Management
• Layer Management
• State Synchronization
• Build System Fixes
• Integration Testing

Phase 7: Permissions and CLI Mirroring ✅

• Permissions System
• Real Package Installation Testing
• 100% rpm-ostree CLI compatibility

Phase 8: Architecture Fix and Bubblewrap Completion ✅

• Daemon-Client Architecture Fix
• D-Bus Communication
• Bubblewrap Integration Completion
• Transaction Management
• Security Model
• Error Handling

✅ Completed Milestones from todo.md

1. CLI Compatibility (100% Complete)

• ✅ All rpm-ostree commands and subcommands implemented
• ✅ 1:1 CLI parity with rpm-ostree
• ✅ Help output matches rpm-ostree exactly
• ✅ Command structure and argument parsing complete

2. Local Commands Implementation (100% Complete)

• ✅ All db subcommands implemented with real functionality
• ✅ All compose subcommands implemented with real functionality
• ✅ Mock implementations replaced with real backend integration
• ✅ Package management, treefile processing, OCI image generation

3. Daemon Commands Implementation (100% Complete)

• ✅ All daemon-based commands implemented with fallback mechanisms
• ✅ System management commands (upgrade, rollback, deploy, rebase, status)
• ✅ Package management commands (install, remove, uninstall)
• ✅ System configuration commands (initramfs, kargs, cleanup, cancel)
• ✅ Graceful fallback to direct system calls when daemon unavailable

4. Real Backend Integration (100% Complete)

• ✅ Real OSTree integration using ostree Rust crate
• ✅ Real APT integration for package management
• ✅ Real status command with OSTree sysroot loading
• ✅ Real package installation with dry-run support
• ✅ Fallback mechanisms for when OSTree sysroot unavailable

5. Enhanced Real Backend Integration (100% Complete)

• ✅ Real OSTree package extraction from commit metadata
• ✅ Real APT upgrade functionality with OSTree layering
• ✅ Real rollback functionality with OSTree deployment management
• ✅ Real transaction management and state tracking
• ✅ Enhanced error handling and fallback mechanisms
• ✅ Real package diff functionality between deployments
• ✅ Real deployment staging and management

6. Advanced Features Implementation (100% Complete)

• ✅ Real D-Bus Daemon: Complete daemon implementation for privileged operations
• ✅ Advanced OSTree Features:
  • ✅ Real commit metadata extraction with package information
  • ✅ Advanced deployment management with staging and validation
  • ✅ Real package layering with atomic operations
  • ✅ Filesystem traversal and analysis
  • ✅ Rollback support with deployment tracking
• ✅ Performance Optimizations:
  • ✅ Caching mechanisms with adaptive eviction
  • ✅ Parallel processing with semaphores
  • ✅ Memory optimization with intelligent management
  • ✅ Performance metrics and monitoring
• ✅ Testing Suite:
  • ✅ Unit tests for all modules
  • ✅ Integration tests for workflows
  • ✅ Performance benchmarks and stress tests
  • ✅ Security tests and vulnerability scanning
• ✅ Comprehensive Error Handling:
  • ✅ Send trait compatibility for async operations
  • ✅ Borrow checker compliance
  • ✅ Serialization trait derives
  • ✅ API compatibility fixes

7. Monitoring & Logging System (100% Complete) 🆕

• ✅ Structured Logging System:
  • ✅ JSON-formatted logs with timestamps and context
  • ✅ Configurable log levels (trace, debug, info, warn, error)
  • ✅ Thread-safe logging with tracing-subscriber
  • ✅ Support for multiple output formats
• ✅ Metrics Collection:
  • ✅ System metrics (CPU, memory, disk usage)
  • ✅ Performance metrics (operation duration, success rates)
  • ✅ Transaction metrics (package operations, deployment changes)
  • ✅ Health check metrics (system component status)
• ✅ Health Monitoring:
  • ✅ OSTree health checks (repository status, deployment validation)
  • ✅ APT health checks (package database integrity)
  • ✅ System resource monitoring (disk space, memory usage)
  • ✅ Daemon health checks (service status, communication)
• ✅ Real-time Monitoring Service:
  • ✅ Background monitoring service (apt-ostree-monitoring)
  • ✅ Continuous metrics collection and health checks
  • ✅ Systemd service integration
  • ✅ Automated alerting and reporting
• ✅ Monitoring Commands:
  • ✅ apt-ostree monitoring --export - Export metrics as JSON
  • ✅ apt-ostree monitoring --health - Run health checks
  • ✅ apt-ostree monitoring --performance - Show performance metrics
• ✅ Comprehensive Documentation:
  • ✅ Monitoring architecture documentation
  • ✅ Configuration guide
  • ✅ Troubleshooting guide
  • ✅ Integration examples

8. Security Hardening System (100% Complete) 🆕

• ✅ Input Validation System:
  • ✅ Path traversal protection (../, .., etc.)
  • ✅ Command injection protection (|, &, ;, `, eval, exec)
  • ✅ SQL injection protection (SELECT, INSERT, etc.)
  • ✅ XSS protection (