aports/scripts: Make it possible to build ARM from other architecture

scripts/mkimage.sh

@@ -261,6 +261,7 @@ for ARCH in $req_arch; do
 		# create root for caching packages
 		mkdir -p "$APKROOT/etc/apk/cache"
 		cp -Pr /etc/apk/keys "$APKROOT/etc/apk/"
+		cp /usr/share/apk/keys/*.pub "$APKROOT/etc/apk/keys/"
 		abuild-apk --arch "$ARCH" --root "$APKROOT" add --initdb
 
 		if [ -z "$REPOS" ]; then

scripts/mkimg.arm.sh

+_apk_fetch() {
+        apk fetch --root "$APKROOT" "$@"
+}
+
 build_rpi_blobs() {
-	apk fetch --quiet --stdout raspberrypi-bootloader | tar -C "${DESTDIR}" -zx --strip=1 boot/
+	_apk_fetch --quiet --stdout raspberrypi-bootloader | tar -C "${DESTDIR}" -zx --strip=1 boot/
 }
 
 rpi_gen_cmdline() {
@@ -96,9 +100,9 @@ profile_rpi() {
 build_uboot() {
 	set -x
 	# FIXME: Fix apk-tools to extract packages directly
-	local pkg pkgs="$(apk fetch  --simulate --root "$APKROOT" --recursive u-boot-all | sed -ne "s/^Downloading \(.*\)\-[0-9].*$/\1/p")"
+	local pkg pkgs="$(_apk_fetch --simulate --recursive u-boot-all | sed -ne "s/^Downloading \(.*\)\-[0-9].*$/\1/p")"
 	for pkg in $pkgs; do
-		[ "$pkg" = "u-boot-all" ] || apk fetch --root "$APKROOT" --stdout $pkg | tar -C "$DESTDIR" -xz usr
+		[ "$pkg" = "u-boot-all" ] || _apk_fetch --stdout $pkg | tar -C "$DESTDIR" -xz usr
 	done
 	mkdir -p "$DESTDIR"/u-boot
 	mv "$DESTDIR"/usr/sbin/update-u-boot "$DESTDIR"/usr/share/u-boot/* "$DESTDIR"/u-boot
@@ -107,7 +111,7 @@ build_uboot() {
 
 section_uboot() {
 	[ -n "$uboot_install" ] || return 0
-	build_section uboot $ARCH $(apk fetch --root "$APKROOT" --simulate --recursive u-boot-all | sort | checksum)
+	build_section uboot $ARCH $(_apk_fetch --simulate --recursive u-boot-all | sort | checksum)
 }
 
 profile_uboot() {

scripts/mkimg.base.sh

@@ -14,6 +14,7 @@ build_kernel() {
 		--feature "$initfs_features" \
 		--modloopfw "$modloopfw" \
 		--repositories-file "$APKROOT/etc/apk/repositories" \
+		--keys-dir "$APKROOT/etc/apk/keys" \
 		"$DESTDIR"
 }