#!/bin/zsh
set -euo pipefail

PROJECT_DIR="${0:A:h:h}"
ARCHIVES_DIR="${1:-$PROJECT_DIR/dist/updates}"
DOWNLOAD_PREFIX="${PUTER_UPDATE_DOWNLOAD_PREFIX:-}"
PRIVATE_KEY="${PUTER_SPARKLE_PRIVATE_KEY:-}"
GENERATOR="$PROJECT_DIR/.build/artifacts/sparkle/Sparkle/bin/generate_appcast"

if [[ -z "$DOWNLOAD_PREFIX" || -z "$PRIVATE_KEY" ]]; then
    print -u2 "Set PUTER_UPDATE_DOWNLOAD_PREFIX and PUTER_SPARKLE_PRIVATE_KEY."
    exit 2
fi
if [[ ! -x "$GENERATOR" ]]; then
    swift package resolve --package-path "$PROJECT_DIR"
fi
mkdir -p "$ARCHIVES_DIR"
print -rn -- "$PRIVATE_KEY" | "$GENERATOR" \
    --ed-key-file - \
    --download-url-prefix "$DOWNLOAD_PREFIX" \
    "$ARCHIVES_DIR"
print "Generated $ARCHIVES_DIR/appcast.xml"