argp for bash
A wrapper for getopt(1) which provides the major features of argp_parse(3) to bash scripts. Scripts pipe their option descriptions (flat file or XML) to argp.sh to generate the code for getopt(1). Also, argp.sh automatically generates help (--help) or a man-page skeleton. Requires bash-3+. There is a c-version argp.c which calls argp_parse(3) directly if speed is an issue.
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