adelie-build-cd: Actually, truly remove all remaining Bashisms

adelie-build-cd

@@ -2,7 +2,7 @@
 
 def_arch=$(uname -m)
 def_ver="1.0-rc1"
-declare -r PROGNAME=$(basename $0)
+readonly PROGNAME=$(basename $0)
 
 
 warn() {
@@ -75,29 +75,29 @@ while [ -n "$1" ]; do
     case $1 in
 	-a | --arch)
 	    shift
-	    declare -r MY_ARCH=$1
+	    readonly MY_ARCH=$1
 	    ;;
 	-h | --help)
 	    usage
 	    exit
 	    ;;
 	-f | --full)
-	    declare -r DO_FULL=full
+	    readonly DO_FULL=full
 	    ;;
 	-k | --kind)
 	    shift
-	    declare -r MY_KIND=$1
+	    readonly MY_KIND=$1
 	    ;;
 	-p | --phase)
 	    shift
-	    declare -r MY_PHASE=$1
+	    readonly MY_PHASE=$1
 	    ;;
 	-s | --sign)
-	    declare -r SIGN=yes
+	    readonly SIGN=yes
 	    ;;
 	-v | --version)
 	    shift
-	    declare -r MY_VER=$1
+	    readonly MY_VER=$1
 	    ;;
 	*)
 	    usage >&2
@@ -108,13 +108,13 @@ while [ -n "$1" ]; do
 done
 
 set -a
-declare -r ARCH=${MY_ARCH:-$def_arch}
-declare -r KIND=${MY_KIND:-live}
-declare -r LDARCH=${LDARCH:-$ARCH}
-declare -r PHASE=${MY_PHASE:-all}
-declare -r VERSION=${MY_VER:-$def_ver}
-declare -r APKVER=${MY_APKVER:-$VERSION}
-declare -r URL=${MY_URL:-https://distfiles.adelielinux.org/adelie/$APKVER/}
+readonly ARCH=${MY_ARCH:-$def_arch}
+readonly KIND=${MY_KIND:-live}
+readonly LDARCH=${LDARCH:-$ARCH}
+readonly PHASE=${MY_PHASE:-all}
+readonly VERSION=${MY_VER:-$def_ver}
+readonly APKVER=${MY_APKVER:-$VERSION}
+readonly URL=${MY_URL:-https://distfiles.adelielinux.org/adelie/$APKVER/}
 set +a
 
 ensure_commands
@@ -144,9 +144,9 @@ clean_dirs() {
 install_pkgs() {
 	header "Installing base system to squash root..."
 
-	declare -r PACKAGES=$(cat packages/base 2>/dev/null || fatal 'No core packages specified')
-	declare -r ARCH_PKGS=$(cat packages/arch/$ARCH 2>/dev/null || echo '')
-	declare -r KIND_PKGS=$(cat packages/kind/$KIND 2>/dev/null || echo '')
+	readonly PACKAGES=$(cat packages/base 2>/dev/null || fatal 'No core packages specified')
+	readonly ARCH_PKGS=$(cat packages/arch/$ARCH 2>/dev/null || echo '')
+	readonly KIND_PKGS=$(cat packages/kind/$KIND 2>/dev/null || echo '')
 
 	mkdir -p squashroot-$ARCH/etc/apk/keys
 	cp 'packages@adelielinux.org.pub' squashroot-$ARCH/etc/apk/keys/
@@ -167,7 +167,9 @@ make_structure() {
 	chown 1000:1000 squashroot-$ARCH/home/live/.zshrc
 	mkdir squashroot-$ARCH/target
 	mkdir -p squashroot-$ARCH/media/live
-	mkdir -p squashroot-$ARCH/etc/runlevels/{sysinit,boot,default,shutdown}
+	for _runlevel in sysinit boot default shutdown; do
+		mkdir -p squashroot-$ARCH/etc/runlevels/$_runlevel
+	done
 
 	echo 'adelie-live' > squashroot-$ARCH/etc/hostname
 	echo 'mtab_is_file=no' > squashroot-$ARCH/etc/conf.d/mtab
@@ -233,7 +235,7 @@ make_structure() {
 			-X "$URL/system/$EXTRA_MIRROR" \
 			-X "$URL/user/$EXTRA_MIRROR" \
 			--root squashroot-$ARCH add docs
-		declare -r PACKAGES_DIR=squashroot-$ARCH/packages/$ARCH
+		readonly PACKAGES_DIR=squashroot-$ARCH/packages/$ARCH
 		mkdir -p $PACKAGES_DIR
 		# Fetch all APKs.
 		apk --arch $ARCH \
@@ -263,8 +265,10 @@ make_initrd() {
 	# mount points
 	mkdir initrd-$ARCH/dev
 	mkdir initrd-$ARCH/media
-	mkdir initrd-$ARCH/{newroot,lowerroot,upperroot}
-	chmod 755 initrd-$ARCH/{newroot,lowerroot,upperroot}
+	for _rootdir in newroot lowerroot upperroot; do
+		mkdir initrd-$ARCH/$_rootdir
+		chmod 755 initrd-$ARCH/$_rootdir
+	done
 	mkdir initrd-$ARCH/proc
 	mkdir initrd-$ARCH/sys
 
@@ -322,10 +326,10 @@ prepare_cdroot() {
 }
 
 create_iso() {
-	local CD_VERSION="$VERSION"
+	CD_VERSION="$VERSION"
 	header 'Creating the CD...'
 
-	declare -r CD_PARAMS=$(cat iso-params-$ARCH)
+	readonly CD_PARAMS=$(cat iso-params-$ARCH)
 	CD_VERSION=$(echo $CD_VERSION | sed s/-alpha/a/)
 	CD_VERSION=$(echo $CD_VERSION | sed s/-beta/b/)
 	CD_VERSION=$(echo $CD_VERSION | sed s/-rc/rc/)