tzst/docs/api/core.md

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Core API

The core module provides the main functionality for working with tzst archives, including the primary TzstArchive class and high-level convenience functions.

.. automodule:: tzst.core
   :members:
   :undoc-members:
   :show-inheritance:
   :no-index:

TzstArchive Class

The main class for handling .tzst/.tar.zst archives with comprehensive functionality for creation, extraction, and manipulation.

.. autoclass:: tzst.TzstArchive
   :members:
   :undoc-members:
   :show-inheritance:
   :special-members: __init__, __enter__, __exit__

Key Features

• Context Manager Support: Use with with statements for automatic resource management
• Multiple Access Modes: Read ('r'), write ('w'), and append ('a') modes
• Streaming Support: Memory-efficient processing for large archives
• Security Features: Built-in protection against path traversal attacks
• Flexible Extraction: Support for selective extraction and conflict resolution

Usage Examples

# Create a new archive
with TzstArchive("backup.tzst", "w", compression_level=6) as archive:
    archive.add("important_file.txt")
    archive.add("documents/", recursive=True)

# Read an existing archive
with TzstArchive("backup.tzst", "r") as archive:
    contents = archive.list(verbose=True)
    is_valid = archive.test()
    archive.extractall("restore/")

Convenience Functions

High-level functions for common archive operations without needing to instantiate the TzstArchive class directly.

create_archive

.. autofunction:: tzst.create_archive

Creates a new tzst archive from the specified files and directories.

Key Features:

• Configurable compression levels (1-22)
• Atomic creation using temporary files
• Automatic path validation and normalization
• Support for both files and directories

extract_archive

.. autofunction:: tzst.extract_archive

Extracts files from a tzst archive with advanced options for handling conflicts and filtering.

Key Features:

• Selective extraction with member filtering
• Multiple conflict resolution strategies
• Flatten option to extract all files to a single directory
• Streaming mode for memory efficiency
• Security filters to prevent path traversal attacks

list_archive

.. autofunction:: tzst.list_archive

Lists the contents of a tzst archive with optional detailed information.

Returns:

• List of dictionaries containing file information
• Each entry includes name, size, modification time, and type
• Verbose mode provides additional metadata

test_archive

.. autofunction:: tzst.test_archive

Tests the integrity of a tzst archive to verify it can be successfully decompressed.

Returns:

• True if the archive is valid and can be extracted
• False if the archive is corrupted or cannot be processed

Enums and Supporting Classes

ConflictResolution

Enumeration for handling file conflicts during extraction:

• REPLACE: Overwrite existing files
• SKIP: Skip existing files
• REPLACE_ALL: Overwrite all existing files without prompting
• SKIP_ALL: Skip all existing files without prompting
• AUTO_RENAME: Automatically rename conflicting files
• AUTO_RENAME_ALL: Automatically rename all conflicting files
• ASK: Prompt user for each conflict (interactive mode)
• EXIT: Stop extraction on first conflict

ConflictResolutionState

State management class for tracking conflict resolution decisions during batch operations.