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 SHA256 hash"
    echo "  extract             Extract the Zig binary package into the directory $TARGET_DIR if not already extracted"
}

fetch() {
    local url="$1"
    local sha256="$2"

    apk add --no-cache --virtual .fetch-deps curl \
        && curl -s -o /usr/src/zig.tar.xz "$url" \
        && echo "$sha256 *zig.tar.xz" | sha256sum -c - \
        && 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)
        if [ -z "$2" ] || [ -z "$3" ]; then
            echo "Error: URL and SHA256 are required for fetch."
            usage
            exit 1
        fi
        fetch "$2" "$3"
        ;;
    
    extract)
        extract
        ;;

    *)
        usage
        exit 1
        ;;
esac