Re: Recommendations for getting Parallel-like ::: behavior using Bash

[Rhys Ulerich]

> I like how GNU Parallel does its ::: magic ...
>
> Has anyone implemented something similar in pure bash?

My quick version of :::-like processing for bash looks like the following:

declare -a cmd
while [ $# -gt 0 ]; do
    [ "$1" = ":::" ] && break
    cmd+=("$1")
    shift
done
if [ "$1" = ":::" ]; then
    while shift && [ $# -gt 0 ]; do
        echo "${cmd[@]}" "$1"
    done
else
    while read line; do
        echo "${cmd[@]}" "$line"
    done
fi

This breaks on multiple ::: and totally ignores ::::.

An "...Only experts do this on purpose...." homage might go in that
final else clause.

- Rhys