An high level argument parsing library for bash
An high level argument parsing library for bash.
Inspired, by the python argparse module, bash-argsparse purpose is to replace the option-parsing and usage-describing functions commonly rewritten in all scripts.
This library is implemented for GNU bash version >= 4.2. Prior versions of bash will fail at interpreting that code.
Doxygen documentation is available online here.
Though Bash Argsparse is hosted at github, you can download tarballs at the following URL: http://argsparse.livna.org/
Though you can build your own package using the provided spec file, a bash-argsparse package is currently available in fedora repositories, for all releases from fedora 19 to rawhide. Ditto for RHEL/Centos 6 & 7, through the EPEL repository.
The argsparse library offers to script developpers the following features:
A basic argsparse run requires no external commands except the quite-common "getopt" command. Some argsparse-built-in type checkings may require some other (like "host" and "getent") but you do not have to use those types.
Argsparse relies on a lot of bash built-in commands ("printf", "[", "read", ...) and internal features such as arrays, associative arrays, extended (ksh-like) globbing. That's why the "extglob" shell option is automatically enabled and posix-mode is automatically disabled when loading the argsparse library.
The code has been tested on bash 4.1, 4.2 and 4.3 and is definitely not POSIX-compliant.
Compliance with the "nounset" and "failglob" bash settings is supported.
Here are the topics covered by scripts in tutorial directory:
Invoke each script without parameter or with --help to obtain usage message.