unified list command for all scripts

e.g. ./build boot roms list
./update blobs inject listboards
./build boot list
./build clean list

also this is now possible:
./build list
or maybe
./update list
^ would list directories in resources/scripts/build
and resources/scripts/update respectively

this script is added:
resources/scripts/build/command/options

call it like so, e.g.
./build command options resources/coreboot

this script is now used, for list functions in
other scripts.

Signed-off-by: Leah Rowe <leah@libreboot.org>

resources/scripts/build/boot/roms

@@ -42,7 +42,8 @@ main()
 
 	firstoption="${1}"
 	[ "${firstoption}" = "help" ] && usage && exit 0
-	[ "${firstoption}" = "list" ] && listboards && exit 0
+	[ "${firstoption}" = "list" ] && \
+	    ./build command options resources/coreboot && exit 0
 
 	while [ $# -gt 0 ]; do
 		case ${1} in
@@ -65,8 +66,8 @@ main()
 	printf "Building %s ROM images\n" "${projectname}"
 
 	if [ "${firstoption}" = "all" ]; then
-		for boardname in $(listboards); do
-			buildrom "${boardname}" || err "build/roms (1): error"
+		for target in $(./build command options resources/coreboot); do
+			buildrom "${target}" || err "build/roms (1): error"
 		done
 	else
 		for board in ${boards}; do
@@ -80,7 +81,7 @@ main()
 usage()
 {
 	cat <<- EOF
-	USAGE:	./build boot roms boardname
+	USAGE:	./build boot roms target
 	To build *all* boards, do this: ./build boot roms all
 	To list *all* boards, do this: ./build boot roms list
 	
@@ -94,23 +95,13 @@ usage()
 		./build boot roms x200_8mb x60
 		./build boot roms x60 -p grub -d corebootfb -k usqwerty
 
-	possible values for 'boardname':
-	$(listboards)
+	possible values for 'target':
+	$(./build command options "resources/coreboot")
 
 	Refer to the ${projectname} documentation for more information.
 	EOF
 }
 
-listboards()
-{
-	for boarddir in resources/coreboot/*; do
-		[ -d "${boarddir}" ] || continue
-		board="${boarddir##resources/coreboot/}"
-		board="${board%/}"
-		printf '%s\n' "${board##*/}"
-	done
-}
-
 # Build ROM images for supported boards
 buildrom() {
 	[ -d "resources/coreboot/${1}/" ] || \

resources/scripts/build/command/options

@@ -0,0 +1,31 @@
+#!/usr/bin/env sh
+
+# Copyright (c) 2023 Leah Rowe <info@minifree.org>
+# SPDX-License-Identifier: MIT
+
+. "include/err.sh"
+
+items=1
+
+main()
+{
+	[ $# -gt 0 ] || \
+		err "No argument given"
+	listitems "${1}" || err "No items present under: ${1}"
+}
+
+listitems()
+{
+	[ -d "${1}" ] || \
+		err "Directory not does exist: ${1}"
+	for x in "${1}/"*; do
+		# -e used because this is for files *or* directories
+		[ -e "${x}" ] || continue
+		[ "${x##*/}" = "build.list" ] && continue
+		printf "%s\n" "${x##*/}"
+		items=0
+	done
+	return ${items}
+}
+
+main $@

resources/scripts/handle/make/config

@@ -76,17 +76,13 @@ main()
 	[ -f "${listfile}" ] || fail "list file, ${listfile}, does not exist"
 
 	# Build for all targets if no argument is given
-	if [ "$#" -eq 0 ]; then
-		for target_dir in "${cfgsdir}"/*; do
-			[ -d "${target_dir}/config/" ] || continue
-			set -- "$@" "${target_dir#${cfgsdir}/}"
-		done
-	fi
+	targets=$(./build command options "${cfgsdir}")
+	[ $# -gt 0 ] && targets=$@
 
 	[ -d "${elfdir}" ] || [ "${mode}" != "all" ] || \
 		mkdir -p "${elfdir}/" || fail "can't create directory ${elfdir}"
 
-	for x in "$@"; do
+	for x in ${targets}; do
 		target="${x}"
 		printf "Running 'make %s' for project '%s, target '%s''\n" \
 		    "${mode}" "${project}" "${target}"

resources/scripts/update/blobs/inject

@@ -44,7 +44,8 @@ main()
 	sname="${0}"
 
 	[ $# -lt 1 ] && err "No options specified."
-	[ "${1}" = "listboards" ] && listboards && exit 0
+	[ "${1}" = "listboards" ] && \
+		./build command options resources/coreboot && exit 0
 
 	archive="${1}"
 
@@ -345,16 +346,6 @@ modify_gbe()
 	rm -f "${_gbe_tmp}"
 }
 
-listboards()
-{
-	for boarddir in "${cbcfgsdir}"/*; do
-		[ -d "${boarddir}" ] || continue
-		board="${boarddir##${cbcfgsdir}/}"
-		board="${board%/}"
-		printf "%s\n" "${board##*/}"
-	done
-}
-
 usage()
 {
 	cat <<- EOF