[WIP] multiarch: Pull tarballs

build

@@ -99,18 +99,57 @@ push() {
 }
 
 library() {
+
+	convert() {
+		# takes a space-separated list of alpine-linux architectures, and returns a space-separated list of docker architectures
+		local i=0
+		for arch in $@; do
+			case "$arch" in # converts Alpine Linux arch strings to Docker arch strings
+				x86_64) echo -n "amd64";;
+				x86) echo -n "i386";;
+				armhf) echo -n "arm32v7";; # TODO: What about arm32v7
+				aarch64) echo -n "arm64v8";;
+				ppc64le) echo -n "ppc64le";;
+				s390x) echo -n "s390x";;
+				*) return 1;; # Fail on unknown archs
+			esac
+			if [[ i -ne $#-1 ]]; then
+				echo -n " "
+			fi
+			let i=$i+1
+		done
+	}
+
+	echo
+	echo "# maintainer: Glider Labs <[email protected]> (@gliderlabs)"
+	echo "# autogenerated by https://github.com/gliderlabs/docker-alpine/blob/master/build"
+	echo
+	echo "GitRepo: https://github.com/gliderlabs/docker-alpine.git"
+
 	for file in versions/library-*/options; do
 		# shellcheck source=versions/library-3.2/options
 		source "$file"
 		local refs
 		refs="$(git ls-remote --exit-code --heads origin rootfs/library-${RELEASE#v})"
 		: "${refs:?}"
-		for tag in "${TAGS[@]}"; do
-			echo "${tag#*:}:" \
-				"git://github.com/gliderlabs/docker-alpine@${refs:0:40}" \
-				"versions/library-${RELEASE#v}"
+		tags=${TAGS[@]}
+		[[ "$ARCHS" ]] || { # compatability with older configs that were only written for x86_64 architectures
+				ARCHS=("x86_64")
+		}
+		a=$(convert ${ARCHS[@]})
+
+		printf "\nTags:" && echo ${tags// /, }
+		echo "Architectures:" ${a// /, }
+		echo "GitCommit:" ${refs:0:40}
+
+		local i=0
+		for arch in $a; do
+			printf "%s-Directory: " "$arch"
+			echo "versions/library-${RELEASE#v}/${ARCHS[i]}"
+			let i=i+1
 		done
 	done
+	echo
 }
 
 main() {