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Bashly - Bash CLI Framework and Generator

Create feature-rich bash scripts using simple YAML configuration

Gem Version Build Status Maintainability


Bashly is a command line application (written in Ruby) that lets you generate feature-rich bash command line tools.

Bashly lets you focus on your specific code, without worrying about command line argument parsing, usage texts, error messages and other functions that are usually handled by a framework in any other programming language.

It is available both as a ruby gem and as a docker image.


How it works

  1. You provide a YAML configuration file, describing commands, sub-commands, arguments, and flags. Running bashly init creates an initial sample YAML file for you (example).
  2. Bashly then automatically generates a bash script (when you run bashly generate) that can parse and validate user input, provide help messages, and run your code for each command.
  3. Your code for each command is kept in a separate file, and can be merged again if you change it (example).


Bashly is responsible for:

  • Generating a single, standalone bash script.
  • Generating usage texts and help screens, showing your tool's arguments, flags and commands (works for sub-commands also).
  • Parsing the user's command line and extracting:
    • Optional or required positional arguments.
    • Optional or required option flags (with or without flag arguments).
    • Commands (and sub-commands).
    • Standard flags (like --help and --version).
  • Preventing your script from running unless the command line is valid.
  • Providing you with a place to input your code for each of the functions your tool performs, and merging it back to the final script.
  • Providing you with additional (optional) framework-style, standard library functions:
    • Color output.
    • Config file management (INI format).
    • YAML parsing.
    • Bash completions.
    • and more.

Contributing / Support

If you experience any issue, have a question or a suggestion, or if you wish to contribute, feel free to open an issue or start a discussion.

Visit the How to contribute page for more information.

Stargazers and Forkers

Stargazers repo roster for @DannyBen/bashly

Forkers repo roster for @DannyBen/bashly