findpath

#!/bin/bash

script="$(basename "$0")"
searchFuncsAndAliases=false
searchAll=false

usage() {
	cat <<-DOC
	Usage: $script [-fa] <regex>

	Check if a binary exists in your PATH. The default is binaries only (including duplicates).

	Options:
        -f, --funcs             search only functions + aliases
        -a, --all               search all (binaries, funcs, aliases)
DOC
}

binaries() {
	IFS=: read -ra pathEntries <<< "$PATH"
	for pathEntry in "${pathEntries[@]}"; do
		if [[ -d $pathEntry ]]; then
			binaries=$(find "$pathEntry" -type f -executable -printf '%f\n' 2> /dev/null | grep -P "$regex" | sort)

			if [[ -n $binaries ]]; then
				printf "\e[38;5;9mBinaries in %s:\e[0m\n" "$pathEntry"
				echo "$binaries"
			fi
		fi
	done
}

funcs() {
	mkfifo pipe

	headerPrinted=false

	while IFS= read -r line; do
		if ! $headerPrinted; then
			printf "\e[38;5;9mFunctions and aliases:\e[0m\n"
			headerPrinted=true
		fi
		echo "$line"
	done < pipe &

	readOutputPID=$!

	findfunc "$regex" > pipe
	exitCode=$?

	wait $readOutputPID
	rm pipe

	if [[ $exitCode = 1 ]]; then
		echo -e "\nNo matching functions or aliases found."
	fi
}

if [[ $# -eq 0 || $1 =~ -[fa] && $# -eq 1 ]]; then
	usage
	exit 1
fi

while [ $# -gt 0 ]; do
	case $1 in
	-f | --funcs)
		searchFuncsAndAliases=true
		;;
	-a | --all)
		searchAll=true
		;;
	-h | --help)
		usage
		exit
		;;
	*)
		regex=$1
		;;
	esac
	shift
done

if $searchFuncsAndAliases; then
	funcs
elif $searchAll; then
	binaries
	funcs
else
	binaries
fi