LiteBuild 0.3.2

Lightweight build engine

LiteBuild

⚠️ THIS IS BETA SOFTWARE

LiteBuild is a lightweight build system for data processing and general-purpose shell workflows.

LiteBuild is optimized for workflows where the primary actions are running templated shell commands that transform data files, image manipulation, or scientific computing tasks. It provides a clean and powerful way to orchestrate complex data pipelines.

Features

1. Declarative Workflow in a Single File

The build process is fully defined in one structured LB_config.yml file. This makes your workflow easy to understand, version control, and reproduce. LiteBuild has no implicit steps. Everything is explicitly defined in the config file.

2. Powerful Parameter Management

• Templated Commands: Construct complex shell commands dynamically from a hierarchy of parameters.
• Hierarchical Configuration: A three-tiered parameter system (Step > Profile > General) maximizes reusability and minimizes boilerplate.
• Flexible Parameter Styles: Natively supports single-dash, double-dash, quoted, and unquoted command-line arguments.

3. Intelligent Build Engine

• True Incremental Builds: The engine tracks file timestamps as well as hashes of commands, inputs, and parameters, ensuring that steps are re-run when anything that affects their output has changed.
• Automatic Parallel Execution: LiteBuild analyzes your dependencies and runs independent branches of your workflow simultaneously to minimize build times.
• Atomic Outputs: Each step must produce a single, primary output file, which serves as a clean and reliable caching key for its state.
• Automatic Workflow Documentation: A built-in "describe" function generates a Markdown file with a Mermaid diagram of your workflow, detailed information about each step, and a complete, ordered list of the shell commands for a full, clean build and integrated readme file if provided.
• Flexible Invocation:

• GUI - LiteBuild can be run from a simple GUI
• Command Line - LiteBuild can be launched from the command line
• Embedded - The LiteBuild engine library can be incorporated into an app. Configuration can be managed via the structured YAML file or passed as a dictionary.

Configuration

The config file is organized into five sections.

A detailed description is in configuration.md

1. OVERVIEW: A brief description of the workflow's purpose.

2. README: The file path to a more detailed Markdown file. The contents of this file will be embedded in the describe output.

3. GENERAL:

   • Defines global parameters (e.g., PROJECT_NAME, PREVIEW) available for templating throughout the file.
   • Can contain a PARAMETERS sub-section to define default parameters for any rule (lowest precedence).

4. PROFILES:

   • Each key under PROFILES defines a specific set of parameters.
   • Contains the data unique to that profile, such as source file lists.
   • Can contain a PARAMETERS sub-section to provide profile-specific parameter overrides (medium precedence).

5. `WORKFLOW:

   • Defines the build workflow as a list of steps.
   • Each step defines:
     • RULE: The name of the rule.
     • REQUIRES: A list of other step names this step depends on.
     • OUTPUT: A single, templated output file path.
   • Each step can optionally define:
     • INPUTS: A list of input files or the outputs of dependency steps.
     • PARAMETERS: A dictionary of parameters that override all other defaults (highest precedence). See configuration.md for details.

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Installation:

The LiteBuild package and all its dependencies are directly installable from PyPI via pip.