script analysis

Dependencies

The script starts by importing necessary modules:

• platform module to retrieve information about the operating system.

• re module for regular expressions.

• PackageNotFoundError and version from importlib.metadata for handling package versions.

• find_packages and setup from setuptools for package discovery and setup configuration.

Parse Requirements

The parse_requirements() function is defined to parse the requirements.txt file:

• It initializes two lists: _install_requires for standard package requirements and _dependency_links for custom index URLs.

• It opens the requirements.txt file, reads each line, and strips any whitespace.

• It checks each line to determine if it is an extra requirement (e.g., "flash-attn", "deepspeed", etc.) or a standard package requirement.

• If the line starts with "--extra-index-url", it extracts the URL and appends it to _dependency_links.

• If the line is not an extra requirement and is not empty or a comment, it appends the line to _install_requires.

Platform-specific requirements

• If the operating system is "Darwin" (macOS), it removes the "xformers==0.0.22" requirement from _install_requires.

• If the operating system is not "Darwin", it retrieves the version of the "torch" package using version("torch").

• It appends the "torch" package requirement with the specific version to _install_requires.

• It parses the "torch" version using a regular expression to extract the major, minor, and patch version numbers.

• If the "torch" version is greater than or equal to "2.1", it removes the "xformers==0.0.22" requirement and appends "xformers>=0.0.23" to _install_requires.

• If the "torch" package is not found, it skips this step.

The setup() function is called to configure the package

• It sets the package name to "axolotl".

• It specifies the version as "0.4.0".

• It provides a short description and a long description for the package.

• It sets the package directory to "src".

• It uses find_packages() to automatically discover packages within the "src" directory.

• It sets the install_requires parameter to the install_requires list obtained from parse_requirements().

• It sets the dependency_links parameter to the dependency_links list obtained from parse_requirements().

• It defines extra requirements using the extras_require parameter, specifying additional dependencies for different features like "flash-attn", "deepspeed", "mamba-ssm", "auto-gptq", "mlflow", "lion-pytorch", and "galore".

Overall, this setup.py script is responsible for configuring the "axolotl" package, specifying its dependencies, handling platform-specific requirements, and defining extra requirements for optional features.

It provides a flexible and customisable setup for the package, allowing users to install the necessary dependencies based on their specific needs.