shell/helpers/arg-parser

Argument parser for bash scripts

More info:

• 🇷🇺 axenov.dev/bash-args
• 🇺🇸 axenov.dev/en/bash-processing-arguments-in-a-script-when-called-from-the-shell/

Tested in Ubuntu 20.04.2 LTS in:

bash 5.0.17(1)-release (x86_64-pc-linux-gnu)
zsh 5.8 (x86_64-ubuntu-linux-gnu)

Version history

v1.0 - initial
v1.1 - arg(): improved skipping uninteresting args
     - arg(): check next arg to be valid value
v1.2 - removed all 'return' statements
     - arg(): error message corrected
     - new examples
v1.3 - argl(): improved flag check
     - some text corrections
v1.4 - new function argn()
     - some text corrections
v1.5 - arg(), grep_match(): fixed searching for -e argument
     - grep_match(): redirect output into /dev/null