Files
netbird/client/internal/updatemanager/doc.go
2025-12-19 19:57:39 +01:00

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// Package updatemanager provides automatic update management for the NetBird client.
// It monitors for new versions, handles update triggers from management server directives,
// and orchestrates the download and installation of client updates.
//
// # Overview
//
// The update manager operates as a background service that continuously monitors for
// available updates and automatically initiates the update process when conditions are met.
// It integrates with the installer package to perform the actual installation.
//
// # Update Flow
//
// The complete update process follows these steps:
//
// 1. Manager receives update directive via SetVersion() or detects new version
// 2. Manager validates update should proceed (version comparison, rate limiting)
// 3. Manager publishes "updating" event to status recorder
// 4. Manager persists UpdateState to track update attempt
// 5. Manager downloads installer file (.msi or .exe) to temporary directory
// 6. Manager triggers installation via installer.RunInstallation()
// 7. Installer package handles the actual installation process
// 8. On next startup, CheckUpdateSuccess() verifies update completion
// 9. Manager publishes success/failure event to status recorder
// 10. Manager cleans up UpdateState
//
// # State Management
//
// Update state is persisted across restarts to track update attempts:
//
// - PreUpdateVersion: Version before update attempt
// - TargetVersion: Version attempting to update to
//
// This enables verification of successful updates and appropriate user notification
// after the client restarts with the new version.
package updatemanager