for-each

#!/usr/bin/env bash

print_help() {
	cat <<EOF
usage: for-each [--help|-h] '<commands>'

commands can use a special string \`{}\`, which will be replaced with
the name of the current component.

examples:
# single  command example
for-each 'git status'

# multiple command example
for-each 'bower version path && git push origin --tags'

# conditional commands and use of \`{}\`
for-each 'if ! { git tag -l | grep "0.0.0"; } &> /dev/null; then echo "{}"; fi'

# a more complex example that shows the repo status more specifically
for-each 'printf "%-30s: %s\n" "{}" "$(git status | grep -oiE "untracked|modified|deleted" | head -n 1)"'

EOF
	exit 1
}

if (($# < 1)); then
	print_help
fi

for opt in "${@:1}"; do
	case "$opt" in
		--help)
			print_help
		;;
		-h)
			print_help
		;;
		*)
			cmd="$opt"
		;;
	esac
done

for dir in t-*
do
	if ! [[ -d "$dir" ]]; then
		continue
	fi

	pushd "$dir" &>/dev/null

	ex_cmd="$(sed -r "s:\{\}:$dir:gi" <<<"$cmd")";
	eval "$ex_cmd"

	popd &>/dev/null
done