docker-zig-manager

#!/bin/sh

set -eux

TARGET_DIR=/usr/local/bin/zig

usage() {
	echo "usage $0 COMMAND"
	echo
	echo "Manage zig binary packages"
	echo
	echo "Commands:"
	echo "  fetch url sha256 Fetch a Zig binary package from the given URL with the given sha hash"
	echo "  extract Extract Zig binary package into directory $TARGET_DIRECTORY if not already extracted"
}

fetch() {
	apk add --no-cache --virtual .fetch-deps curl \
		&& curl -s -o zig.tar.xz "$1" ; \
		if [[ -n "$2" ]]; then
			echo "$2 *zig.tar.xz" | sha256sum -c - ;
		fi \
		&& apk del .fetch-deps
}

extract() {
	apk add --no-cache --virtual .extract-deps tar xz \
		&& mkdir -p "$TARGET_DIR" ; \
		if [[ ! -f "$TARGET_DIR/.extracted" ]]; then
			tar -Jxf /usr/src/zig.tar.xz -C "$TARGET_DIR" --strip-components=1 ; \
			touch "$TARGET_DIR/.extracted" ;
		fi \
		&& rm /usr/src/zig.tar.xz \
		&& apk del .extract-deps
}

case "$1" in
	fetch)
		fetch $2 $3
		;;

	extract)
		extract
		;;

	*)
		usage
		exit 1
		;;
esac