Skip to content
forked from nk412/optparse

Simple command line arguments parser for BASH

License

Notifications You must be signed in to change notification settings

qboster/optparse

 
 

Folders and files

NameName
Last commit message
Last commit date

Latest commit

 

History

22 Commits
 
 
 
 
 
 
 
 

Repository files navigation

Optparse

A BASH wrapper for getopts, for simple command-line argument parsing

( ! ) ATTENTION MAC USERS

Optparse requires gnu-sed instead of the default Mac version of sed, which you can do with the following:

brew install gnu-sed --with-default-names

What is this?

A wrapper that provides a clean and easy way to parse arguments to your BASH scripts. It lets you define short and long option names, handle flag variables, and set default values for optional arguments, all while aiming to be as minimal as possible: One line per argument definition.

Usage

See sample_head.sh for a demonstration of optparse

1. Define your arguments

Each argument to the script is defined with optparse.define, which specifies the option names, a short description, the variable it sets and the default value (if any).

optparse.define short=f long=file desc="The input file" variable=filename

Flags are defined in exactly the same way, but with an extra parameter value that is assigned to the variable.

optparse.define short=v long=verbose desc="Set flag for verbose mode" variable=verbose_mode value=true default=false

2. Evaluate your arguments

The optparse.build function creates a temporary header script based on the provided argument definitions. Simply source the file the function returns, to parse the arguments.

source $( optparse.build )

That's it!

The script can now make use of the variables. Running the script (without any arguments) should give you a neat usage description.

usage: ./script.sh [OPTIONS]

OPTIONS:

    -f --file  :  The input file
	-v --verbose  :  Set flag for verbose mode

	-? --help  :  usage

Supported definition parameters

All definition parameters for optparse.define are provided as key=value pairs, seperated by an = sign.

short

a short, single-letter name for the option

long

a longer expanded option name

variable

the target variable that the argument represents

value(optional)

the value to set the variable to. If unspecified, user is expected to provide a value.

desc(optional)

a short description of the argument (to build the usage description)

default(optional)

the default value to set the variable to if argument not specified

Installation

  1. Download/clone optparse.bash
  2. Add
`source /path/to/optparse.bash` 

to ~/.bashrc

About

Simple command line arguments parser for BASH

Resources

License

Stars

Watchers

Forks

Releases

No releases published

Packages

No packages published

Languages

  • Shell 100.0%