Merge branch 'unsupported-arch' into 'master'

feat: allow building for unsupported architecture

See merge request archlinux/devtools!294

src/lib/build/build.sh

@@ -124,6 +124,7 @@ pkgctl_build() {
 	local RELEASE=0
 	local DB_UPDATE=0
 	local INSTALL_TO_HOST=none
+	local UNSUPPORTED_ARCH=0
 
 	local REPO=
 	local PKGVER=
@@ -165,7 +166,8 @@ pkgctl_build() {
 					BUILD_ARCH=("${DEVTOOLS_VALID_ARCHES[0]}")
 				elif ! in_array "${2}" "${BUILD_ARCH[@]}"; then
 					if ! in_array "${2}" "${DEVTOOLS_VALID_ARCHES[@]}"; then
-						die 'invalid architecture: %s' "${2}"
+						warning 'unsupported architecture: %s' "${2}"
+						UNSUPPORTED_ARCH=1
 					fi
 					BUILD_ARCH+=("${2}")
 				fi
@@ -312,6 +314,9 @@ pkgctl_build() {
 
 	# Update pacman cache for auto-detection
 	if [[ -z ${REPO} ]]; then
+		if (( UNSUPPORTED_ARCH )); then
+			die "Unsupported architecture specified, cannot auto-detect repository"
+		fi
 		update_pacman_repo_cache multilib
 	# Check valid repos if not resolved dynamically
 	elif ! in_array "${REPO}" "${DEVTOOLS_VALID_REPOS[@]}"; then
@@ -343,7 +348,7 @@ pkgctl_build() {
 		fi
 
 		# fail if an existing package specifies --repo
-		if [[ -n "${repo}" ]] && [[ -n ${pkgrepo} ]]; then
+		if [[ -n "${repo}" ]] && [[ -n ${pkgrepo} ]] && (( ! UNSUPPORTED_ARCH )); then
 			# allow unstable to use --repo
 			if [[ ${pkgrepo} == *unstable ]]; then
 				repo=${pkgrepo}