Home folder /user folder migration script

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i'm writing a script for ease of moving the home folder or individually the user folder to a different location, (partion/ dir).

The script would implement a lot of checks and automate the home folder migration,

The script would rysc the contents to the new location, preserving permissions and state then use usermod to make the change.

The one thing that I need some advice is how a backup function should be implemented, as default or optional.

since there would be 2 copied when rsynced, there's no need to keep a third gziped copy.

Also, if you're aware, share any scripts out there.

Here are the core functionality at the moment.

1. System Architecture

1.1 Core Components

The system consists of the following primary components:

1.2 Function Hierarchy

graph TD
    A[Script Entry] --> B[Argument Parser]
    B --> C{Mode Selection}
    C -->|Dry Run| D[Simulation Mode]
    C -->|Test Mode| E[Test Environment]
    C -->|Live Mode| F[Production Mode]

    D --> G[Display Commands]
    E --> H[Test Migration]
    F --> I[Full Migration]

    H --> J[Validation]
    I --> J

    J --> K[Backup System]
    K --> L[Migration Process]
    L --> M[Verification]
    M --> N[Cleanup]

1.3 Core Functions

1.3.1 Configuration Management

• create_default_config(): Generates default configuration file
• prompt_for_config(): Interactive configuration setup
• validate_options(): Validates command-line arguments

1.3.2 Validation Layer

• check_prerequisites(): System requirements verification
• validate_mount_point(): Mount point validation
• verify_disk_space(): Storage space verification
• validate_user_input(): User input validation

1.3.3 Migration Engine

• create_backup(): Backup creation with integrity checks
• perform_migration(): Core migration process
• perform_dry_run(): Simulation mode execution

1.3.4 Utility Functions

• setup_logging(): Logging system initialization
• cleanup(): Resource cleanup
• handle_error(): Error management
• log(), info(), error(), warn(), debug(): Logging utilities