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POSIX helper functions
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| # Fish-like contains (https://fishshell.com/docs/current/cmds/contains.html) | |
| contains() {( | |
| while getopts "i" opt; do | |
| case "$opt" in | |
| i) o_index=1 ;; | |
| *) return 1 ;; | |
| esac | |
| done | |
| shift $(( OPTIND - 1 )) | |
| if [ "$#" -eq 0 ]; then | |
| echo >&2 "contains: key not specified" | |
| return 1 | |
| fi | |
| key="$1"; shift | |
| index=0 | |
| for val in "$@"; do | |
| index=$(( index + 1 )) | |
| if [ "$val" = "$key" ]; then | |
| [ -n "$o_index" ] && echo $index | |
| return 0 | |
| fi | |
| done | |
| return 1 | |
| )} |
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| # POSIX test for function existance. | |
| is_function() { | |
| [ "$#" -eq 1 ] || return 1 | |
| type "$1" | sed "s/$1//" | grep -qwi function | |
| } |
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