594 lines
No EOL
22 KiB
Markdown
594 lines
No EOL
22 KiB
Markdown
# Deb-Mock Plugin System Roadmap
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## Overview
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This document outlines the roadmap for implementing a comprehensive plugin system in **Deb-Mock**, inspired by Fedora's Mock plugin architecture but adapted specifically for Debian-based systems. The plugin system will provide extensible functionality for build environment management, performance optimization, and Debian-specific features.
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## Plugin Hook System
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Based on [Mock's Plugin Hooks](https://rpm-software-management.github.io/mock/Plugin-Hooks), **Deb-Mock** implements a comprehensive hook system that allows plugins to integrate at specific points in the build lifecycle.
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### Hook Points
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| Hook Name | Description | When Called | Use Cases |
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|-----------|-------------|-------------|-----------|
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| `clean` | Clean up plugin resources | After chroot cleanup | Resource cleanup, cache management |
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| `earlyprebuild` | Very early build stage | Before SRPM rebuild, before dependencies | Environment setup, pre-validation |
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| `initfailed` | Chroot initialization failed | When chroot creation fails | Error reporting, cleanup |
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| `list_snapshots` | List available snapshots | When `--list-snapshots` is used | Snapshot management |
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| `make_snapshot` | Create a snapshot | When snapshot creation is requested | State preservation |
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| `mount_root` | Mount chroot directory | Before preinit, chroot exists | Filesystem mounting |
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| `postbuild` | After build completion | After RPM/SRPM build (success/failure) | Result processing, cleanup |
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| `postchroot` | After chroot command | After `mock chroot` command | Cache updates, cleanup |
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| `postclean` | After chroot cleanup | After chroot content deletion | Resource cleanup |
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| `postdeps` | After dependency installation | Dependencies installed, before build | Environment verification |
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| `postinit` | After chroot initialization | Chroot ready for dependencies | Cache creation, setup |
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| `postshell` | After shell exit | After `mock shell` command | Cache updates, cleanup |
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| `postupdate` | After package updates | After successful package updates | Cache updates |
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| `postumount` | After unmounting | All inner mounts unmounted | Filesystem cleanup |
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| `postapt` | After APT operations | After any package manager action | Package state tracking |
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| `prebuild` | Before build starts | After BuildRequires, before RPM build | Build preparation |
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| `prechroot` | Before chroot command | Before `mock chroot` command | Cache restoration |
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| `preinit` | Before chroot initialization | Only chroot/result dirs exist | Cache restoration, setup |
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| `preshell` | Before shell prompt | Before `mock shell` prompt | Cache restoration, setup |
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| `preapt` | Before APT operations | Before any package manager action | Cache preparation |
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| `process_logs` | Process build logs | After build log completion | Log compression, analysis |
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| `remove_snapshot` | Remove snapshot | When snapshot removal requested | Snapshot cleanup |
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| `rollback_to` | Rollback to snapshot | When rollback requested | State restoration |
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| `scrub` | Scrub chroot | When chroot scrubbing requested | Deep cleanup |
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### Hook Registration
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Plugins register hooks using the same pattern as Mock:
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```python
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# In plugin __init__ method
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plugins.add_hook("postbuild", self.post_build_handler)
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plugins.add_hook("preinit", self.pre_init_handler)
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plugins.add_hook("clean", self.cleanup_handler)
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```
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## Mock Plugin Analysis & Deb-Mock Implementation Status
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### ✅ Already Implemented (Core Features)
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| Mock Plugin | Deb-Mock Status | Implementation Notes |
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|-------------|----------------|---------------------|
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| **CCache** | ✅ Implemented | Integrated into cache management system |
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| **RootCache** | ✅ Implemented | Root cache with validation and cleanup |
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| **YumCache** | ✅ Implemented | Package cache for downloaded .deb files |
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### 🔄 High Priority Plugins (Easy Implementation)
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#### 1. BindMount Plugin
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- **Purpose**: Mount host directories/files into chroot environments
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- **Fedora-specific**: No - generic Linux feature
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- **Implementation Complexity**: Low - uses `mount --bind`
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- **Priority**: 🔴 **High** - Essential for development workflows
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- **Use Cases**: Source code mounting, shared libraries, development tools
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- **Hooks**: `mount_root`, `postumount`
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#### 2. CompressLogs Plugin
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- **Purpose**: Compress build logs to save disk space
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- **Fedora-specific**: No - generic compression functionality
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- **Implementation Complexity**: Low - uses `gzip/xz`
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- **Priority**: 🟡 **Medium** - Nice to have feature
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- **Use Cases**: CI/CD environments, long-term log storage
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- **Hooks**: `process_logs`
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#### 3. ChrootScan Plugin
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- **Purpose**: Copy specific files from chroot after build (core dumps, logs, artifacts)
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- **Fedora-specific**: No - generic file scanning and copying
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- **Implementation Complexity**: Low - file pattern matching and copying
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- **Priority**: 🟡 **Medium** - Useful for debugging and analysis
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- **Use Cases**: Debugging failed builds, collecting build artifacts
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- **Hooks**: `postbuild`
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#### 4. Tmpfs Plugin
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- **Purpose**: Use tmpfs for faster I/O operations in chroot
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- **Fedora-specific**: No - Linux kernel feature
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- **Implementation Complexity**: Low - mount tmpfs filesystem
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- **Priority**: 🟡 **Medium** - Performance optimization
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- **Use Cases**: High-performance builds, memory-rich systems
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- **Hooks**: `mount_root`, `postumount`
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### 🔄 Medium Priority Plugins (Moderate Complexity)
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#### 5. BuildrootLock Plugin
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- **Purpose**: Generate reproducible build environment lockfiles
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- **Fedora-specific**: No - generic reproducibility concept
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- **Implementation Complexity**: Moderate - JSON lockfile generation and validation
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- **Priority**: 🔴 **High** - Critical for reproducible builds
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- **Use Cases**: CI/CD reproducibility, build environment consistency
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- **Hooks**: `postdeps`, `postbuild`
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#### 6. Export-Buildroot-Image Plugin
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- **Purpose**: Export chroot as OCI container image
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- **Fedora-specific**: No - OCI standard
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- **Implementation Complexity**: Moderate - debootstrap + OCI tools integration
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- **Priority**: 🟡 **Medium** - Container integration
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- **Use Cases**: Container-based builds, deployment pipelines
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- **Hooks**: `postbuild`
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#### 7. Mount Plugin
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- **Purpose**: Mount additional filesystems in chroot
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- **Fedora-specific**: No - generic filesystem mounting
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- **Implementation Complexity**: Moderate - filesystem mounting and management
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- **Priority**: 🟡 **Medium** - Advanced use cases
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- **Use Cases**: Network filesystems, specialized storage
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- **Hooks**: `mount_root`, `postumount`
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### 🔄 Low Priority Plugins (Complex/Advanced)
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#### 8. Overlayfs Plugin
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- **Purpose**: Use overlayfs for faster chroot operations
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- **Fedora-specific**: No - Linux kernel feature
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- **Implementation Complexity**: High - overlayfs management and optimization
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- **Priority**: 🟢 **Low** - Advanced optimization
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- **Use Cases**: High-frequency builds, resource optimization
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- **Hooks**: `mount_root`, `postumount`
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#### 9. LvmRoot Plugin
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- **Purpose**: Use LVM for chroot storage management
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- **Fedora-specific**: No - Linux LVM
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- **Implementation Complexity**: High - LVM volume management
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- **Priority**: 🟢 **Low** - Advanced storage management
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- **Use Cases**: Large-scale deployments, storage optimization
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- **Hooks**: `mount_root`, `postclean`, `postumount`
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### ❌ Fedora-Specific Plugins (Not Directly Applicable)
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| Mock Plugin | Why Not Applicable | Deb-Mock Alternative |
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|-------------|-------------------|---------------------|
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| **PackageState** | RPM-specific package state tracking | Debian package state tracking |
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| **PMRequest** | RPM package manager requests | APT package manager requests |
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| **rpkg-preprocessor** | RPM-specific preprocessing | Debian source preprocessing |
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| **SELinux** | Fedora SELinux policies | AppArmor integration |
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| **Sign** | RPM signing mechanisms | Debian package signing |
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| **Scm** | Git/SVN integration | Git integration (generic) |
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## Debian-Specific Plugin Opportunities
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### 1. AppArmor Plugin (Debian Alternative to SELinux)
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- **Purpose**: AppArmor profile management for chroot environments
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- **Implementation**: AppArmor profile generation and enforcement
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- **Priority**: 🟡 **Medium** - Security enhancement
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- **Use Cases**: Secure build environments, policy enforcement
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- **Hooks**: `preinit`, `postinit`, `clean`
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### 2. DebianSource Plugin
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- **Purpose**: Handle Debian source package formats (.dsc, .orig.tar.gz, .debian.tar.gz)
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- **Implementation**: Source package validation and preprocessing
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- **Priority**: 🔴 **High** - Core Debian functionality
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- **Use Cases**: Source package handling, format validation
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- **Hooks**: `earlyprebuild`, `prebuild`
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### 3. APTRequest Plugin
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- **Purpose**: Handle APT package manager requests and dependency resolution
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- **Implementation**: APT dependency resolution and package installation
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- **Priority**: 🔴 **High** - Core package management
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- **Use Cases**: Dependency management, package installation
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- **Hooks**: `preapt`, `postapt`
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### 4. DebianSign Plugin
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- **Purpose**: Debian package signing (debsign, dpkg-sig)
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- **Implementation**: GPG signing of .deb packages and .changes files
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- **Priority**: 🟡 **Medium** - Package security
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- **Use Cases**: Package signing, security compliance
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- **Hooks**: `postbuild`
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## Implementation Roadmap
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### Phase 1: Hook System Infrastructure
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#### Plugin Hook Manager
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```python
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# deb_mock/plugins/hook_manager.py
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class HookManager:
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"""Manages plugin hooks and their execution"""
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def __init__(self):
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self.hooks = {}
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def add_hook(self, hook_name: str, callback):
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"""Register a hook callback"""
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if hook_name not in self.hooks:
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self.hooks[hook_name] = []
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self.hooks[hook_name].append(callback)
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def call_hook(self, hook_name: str, context: dict = None):
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"""Execute all registered hooks for a given hook name"""
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if hook_name not in self.hooks:
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return
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context = context or {}
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for callback in self.hooks[hook_name]:
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try:
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callback(context)
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except Exception as e:
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# Log hook execution errors but don't fail the build
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print(f"Warning: Hook {hook_name} failed: {e}")
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def get_hook_names(self) -> list:
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"""Get list of available hook names"""
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return list(self.hooks.keys())
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```
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#### Enhanced Base Plugin Class
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```python
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# deb_mock/plugins/base.py
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class BasePlugin:
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"""Base class for all Deb-Mock plugins"""
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def __init__(self, config, hook_manager):
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self.config = config
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self.hook_manager = hook_manager
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self.enabled = self._is_enabled()
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self._register_hooks()
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def _is_enabled(self) -> bool:
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"""Check if plugin is enabled in configuration"""
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return self.config.plugins.get(self.name, {}).get('enabled', False)
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def _register_hooks(self):
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"""Register plugin hooks with the hook manager"""
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# Override in subclasses to register specific hooks
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pass
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# Hook method stubs - override in subclasses as needed
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def clean(self, context): pass
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def earlyprebuild(self, context): pass
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def initfailed(self, context): pass
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def list_snapshots(self, context): pass
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def make_snapshot(self, context): pass
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def mount_root(self, context): pass
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def postbuild(self, context): pass
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def postchroot(self, context): pass
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def postclean(self, context): pass
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def postdeps(self, context): pass
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def postinit(self, context): pass
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def postshell(self, context): pass
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def postupdate(self, context): pass
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def postumount(self, context): pass
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def postapt(self, context): pass
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def prebuild(self, context): pass
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def prechroot(self, context): pass
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def preinit(self, context): pass
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def preshell(self, context): pass
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def preapt(self, context): pass
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def process_logs(self, context): pass
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def remove_snapshot(self, context): pass
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def rollback_to(self, context): pass
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def scrub(self, context): pass
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```
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### Phase 2: Core Plugins with Hook Integration
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#### BindMount Plugin with Hooks
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```python
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# deb_mock/plugins/bind_mount.py
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class BindMountPlugin(BasePlugin):
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"""Mount host directories into chroot environments"""
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def _register_hooks(self):
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"""Register bind mount hooks"""
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self.hook_manager.add_hook("mount_root", self.mount_root)
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self.hook_manager.add_hook("postumount", self.postumount)
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def mount_root(self, context):
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"""Mount bind mounts when chroot is mounted"""
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if not self.enabled:
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return
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chroot_path = context.get('chroot_path')
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if not chroot_path:
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return
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for host_path, chroot_mount_path in self.config.plugins.bind_mount.mounts:
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full_chroot_path = os.path.join(chroot_path, chroot_mount_path.lstrip('/'))
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subprocess.run(['mount', '--bind', host_path, full_chroot_path])
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def postumount(self, context):
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"""Unmount bind mounts when chroot is unmounted"""
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if not self.enabled:
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return
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chroot_path = context.get('chroot_path')
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if not chroot_path:
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return
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for host_path, chroot_mount_path in self.config.plugins.bind_mount.mounts:
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full_chroot_path = os.path.join(chroot_path, chroot_mount_path.lstrip('/'))
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subprocess.run(['umount', full_chroot_path])
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```
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#### RootCache Plugin with Hooks
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```python
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# deb_mock/plugins/root_cache.py
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class RootCachePlugin(BasePlugin):
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"""Root cache management with hook integration"""
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def _register_hooks(self):
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"""Register root cache hooks"""
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self.hook_manager.add_hook("preinit", self.preinit)
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self.hook_manager.add_hook("postinit", self.postinit)
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self.hook_manager.add_hook("postchroot", self.postchroot)
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self.hook_manager.add_hook("postshell", self.postshell)
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self.hook_manager.add_hook("clean", self.clean)
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def preinit(self, context):
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"""Restore chroot from cache before initialization"""
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if not self.enabled:
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return
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chroot_name = context.get('chroot_name')
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if self._cache_exists(chroot_name):
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self._restore_from_cache(chroot_name, context)
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def postinit(self, context):
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"""Create cache after successful initialization"""
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if not self.enabled:
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return
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chroot_name = context.get('chroot_name')
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self._create_cache(chroot_name, context)
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def postchroot(self, context):
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"""Update cache after chroot operations"""
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if not self.enabled:
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return
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chroot_name = context.get('chroot_name')
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self._update_cache(chroot_name, context)
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def postshell(self, context):
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"""Update cache after shell operations"""
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if not self.enabled:
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return
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chroot_name = context.get('chroot_name')
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self._update_cache(chroot_name, context)
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def clean(self, context):
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"""Clean up cache resources"""
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if not self.enabled:
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return
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self._cleanup_old_caches()
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```
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#### CompressLogs Plugin with Hooks
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```python
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# deb_mock/plugins/compress_logs.py
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class CompressLogsPlugin(BasePlugin):
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"""Compress build logs with hook integration"""
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def _register_hooks(self):
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"""Register log compression hooks"""
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self.hook_manager.add_hook("process_logs", self.process_logs)
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def process_logs(self, context):
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"""Compress build logs after build completion"""
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if not self.enabled:
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return
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log_dir = context.get('log_dir')
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if not log_dir:
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return
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compression = self.config.plugins.compress_logs.compression
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level = self.config.plugins.compress_logs.level
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for log_file in Path(log_dir).glob('*.log'):
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if compression == 'gzip':
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subprocess.run(['gzip', f'-{level}', str(log_file)])
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elif compression == 'xz':
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subprocess.run(['xz', f'-{level}', str(log_file)])
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```
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### Phase 3: Debian-Specific Plugins with Hooks
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#### APTRequest Plugin with Hooks
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```python
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# deb_mock/plugins/apt_request.py
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class APTRequestPlugin(BasePlugin):
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"""APT package manager integration with hooks"""
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def _register_hooks(self):
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"""Register APT request hooks"""
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self.hook_manager.add_hook("preapt", self.prequest)
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self.hook_manager.add_hook("postapt", self.postrequest)
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def prequest(self, context):
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"""Handle pre-APT operations"""
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if not self.enabled:
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return
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operation = context.get('operation')
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packages = context.get('packages', [])
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# Log APT operations
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self._log_apt_operation(operation, packages)
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# Update package cache if needed
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if self.config.plugins.apt_request.update_cache:
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self._update_package_cache(context)
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def postrequest(self, context):
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"""Handle post-APT operations"""
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if not self.enabled:
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return
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operation = context.get('operation')
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result = context.get('result')
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# Track package state changes
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self._update_package_state(operation, result)
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# Update caches if packages were modified
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if result and result.get('packages_modified'):
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self._invalidate_caches(context)
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```
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#### DebianSource Plugin with Hooks
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```python
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# deb_mock/plugins/debian_source.py
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class DebianSourcePlugin(BasePlugin):
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"""Debian source package handling with hooks"""
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def _register_hooks(self):
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"""Register source package hooks"""
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self.hook_manager.add_hook("earlyprebuild", self.earlyprebuild)
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self.hook_manager.add_hook("prebuild", self.prebuild)
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def earlyprebuild(self, context):
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"""Validate and prepare source package"""
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if not self.enabled:
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return
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source_package = context.get('source_package')
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if not source_package:
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return
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# Validate source package format
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self._validate_source_package(source_package)
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# Extract source package if needed
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if self.config.plugins.debian_source.extract_patches:
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self._extract_source_package(source_package, context)
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def prebuild(self, context):
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"""Prepare source package for building"""
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if not self.enabled:
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return
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source_package = context.get('source_package')
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build_dir = context.get('build_dir')
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# Apply patches if needed
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self._apply_patches(source_package, build_dir)
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# Verify checksums if enabled
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if self.config.plugins.debian_source.validate_checksums:
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self._verify_checksums(source_package)
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```
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## Configuration Integration
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### Plugin Configuration in YAML
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```yaml
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# deb-mock.yaml
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plugins:
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bind_mount:
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enabled: true
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mounts:
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- host_path: "/home/user/project"
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chroot_path: "/builddir/project"
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root_cache:
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enabled: true
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cache_dir: "/var/cache/deb-mock/root-cache"
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max_age_days: 7
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compress_logs:
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enabled: true
|
|
compression: "gzip"
|
|
level: 9
|
|
|
|
tmpfs:
|
|
enabled: true
|
|
size: "2G"
|
|
mount_point: "/tmp"
|
|
|
|
debian_source:
|
|
enabled: true
|
|
validate_checksums: true
|
|
extract_patches: true
|
|
|
|
apt_request:
|
|
enabled: true
|
|
update_cache: true
|
|
install_recommends: false
|
|
track_package_state: true
|
|
```
|
|
|
|
### CLI Integration
|
|
```bash
|
|
# Enable specific plugins
|
|
deb-mock --enable-plugin bind_mount,compress_logs build package.dsc
|
|
|
|
# Plugin-specific options
|
|
deb-mock --plugin-option bind_mount:mounts=[("/host/path", "/chroot/path")] build package.dsc
|
|
|
|
# List available plugins
|
|
deb-mock list-plugins
|
|
|
|
# Show plugin help
|
|
deb-mock plugin-help bind_mock
|
|
|
|
# List available hooks
|
|
deb-mock list-hooks
|
|
|
|
# Show hook usage
|
|
deb-mock hook-info postbuild
|
|
```
|
|
|
|
## Hook Context Information
|
|
|
|
Each hook receives a context dictionary with relevant information:
|
|
|
|
### Common Context Keys
|
|
- `chroot_name`: Name of the chroot
|
|
- `chroot_path`: Path to the chroot directory
|
|
- `source_package`: Source package being built
|
|
- `build_dir`: Build directory
|
|
- `log_dir`: Log directory
|
|
- `result_dir`: Result directory
|
|
- `operation`: Current operation being performed
|
|
- `config`: Current configuration
|
|
- `result`: Operation result (for post-hooks)
|
|
|
|
### Hook-Specific Context
|
|
- `mount_root`: `chroot_path`, `mount_points`
|
|
- `postbuild`: `build_result`, `artifacts`, `build_log`
|
|
- `preapt/postapt`: `operation`, `packages`, `result`
|
|
- `process_logs`: `log_files`, `log_dir`
|
|
- `clean`: `chroot_name`, `cleanup_type`
|
|
|
|
## Priority Recommendations
|
|
|
|
### Immediate (Next Sprint)
|
|
1. **Hook System Infrastructure** - Core hook management
|
|
2. **BindMount Plugin** - Essential for development workflows
|
|
3. **RootCache Plugin** - Critical for performance
|
|
4. **CompressLogs Plugin** - Simple but useful
|
|
|
|
### Short Term (Next Month)
|
|
1. **Tmpfs Plugin** - Performance optimization
|
|
2. **ChrootScan Plugin** - Debugging support
|
|
3. **DebianSource Plugin** - Core Debian functionality
|
|
4. **APTRequest Plugin** - Enhanced package management
|
|
|
|
### Medium Term (Next Quarter)
|
|
1. **Export-Buildroot-Image Plugin** - Container integration
|
|
2. **AppArmor Plugin** - Security enhancement
|
|
3. **BuildrootLock Plugin** - Reproducible builds
|
|
4. **Mount Plugin** - Advanced filesystem support
|
|
|
|
### Long Term (Future)
|
|
1. **Overlayfs Plugin** - Advanced optimization
|
|
2. **LvmRoot Plugin** - Advanced storage
|
|
3. **DebianSign Plugin** - Package security
|
|
4. **Snapshot Plugin** - State management
|
|
|
|
## Conclusion
|
|
|
|
This enhanced plugin system with comprehensive hooks provides **Deb-Mock** with the same level of extensibility as Mock while being specifically tailored for Debian-based systems. The hook system allows plugins to integrate seamlessly at the right points in the build lifecycle, providing maximum flexibility and power.
|
|
|
|
The implementation strategy focuses on:
|
|
- **Comprehensive hook coverage** matching Mock's capabilities
|
|
- **Debian-specific adaptations** for package management and workflows
|
|
- **Performance optimization** through intelligent hook usage
|
|
- **Extensibility** through a well-designed plugin architecture
|
|
|
|
This approach ensures that **Deb-Mock** can provide the same level of functionality as Mock while being specifically tailored to Debian-based systems and workflows. |