#!/usr/bin/env nix-shell
#!nix-shell -i bash -p nix wget prefetch-yarn-deps nix-prefetch-github jq

if [ "$#" -gt 3 ] || [[ "$1" == -* ]]; then
  echo "Regenerates packaging data for the ERPNext packages."
  echo "Usage: $0 [git bench release tag] [git erpnext release tag] [git frappe release tag]"
  exit 1
fi

bench_version="$1"
erpnext_version="$2"
frappe_version="$3"

set -euo pipefail

if [ -z "$bench_version" ]; then
  bench_version="$(wget --quiet --output-document=- "https://api.github.com/repos/frappe/bench/releases?per_page=1" | jq --raw-output '.[0].tag_name')"
fi
if [ -z "$erpnext_version" ]; then
  erpnext_version="$(wget --quiet --output-document=- "https://api.github.com/repos/frappe/erpnext/releases?per_page=1" | jq --raw-output '.[0].tag_name')"
fi
if [ -z "$frappe_version" ]; then
  frappe_version="$(wget --quiet --output-document=- "https://api.github.com/repos/frappe/frappe/releases?per_page=1" | jq --raw-output '.[0].tag_name')"
fi

# strip leading "v"
bench_version="${bench_version#v}"
erpnext_version="${erpnext_version#v}"
frappe_version="${frappe_version#v}"

# Bench
echo "Prefetching bench source version $bench_version from GitHub ..."
bench_src_hash=$(nix-prefetch-github frappe bench --rev "v${bench_version}" | jq --raw-output .hash)

# Erpnext
echo "Prefetching erpnext source version $erpnext_version from GitHub ..."
erpnext_src="https://raw.githubusercontent.com/frappe/erpnext/v$erpnext_version"
erpnext_src_hash="$(nix-prefetch-github frappe erpnext --rev "v${erpnext_version}" | jq --raw-output .hash)"

erpnext_tmpdir=$(mktemp --directory)
trap 'rm -rf "$erpnext_tmpdir"' EXIT

pushd "$erpnext_tmpdir" &> /dev/null
wget --quiet "$erpnext_src/yarn.lock"
echo "Prefetching erpnext yarn dependencies ..."
erpnext_yarn_hash=$(prefetch-yarn-deps yarn.lock)
popd &> /dev/null

# Frappe
echo "Prefetching frappe source version $frappe_version from GitHub ..."
frappe_src="https://raw.githubusercontent.com/frappe/frappe/v$frappe_version"
frappe_src_hash="$(nix-prefetch-github frappe frappe --rev "v${frappe_version}" | jq --raw-output .hash)"

frappe_tmpdir=$(mktemp --directory)
trap 'rm -rf "$frappe_tmpdir"' EXIT

pushd "$frappe_tmpdir" &> /dev/null
wget --quiet "$frappe_src/yarn.lock"
echo "Prefetching frappe yarn dependencies ..."
frappe_yarn_hash=$(prefetch-yarn-deps yarn.lock)
popd &> /dev/null

echo "Saving updated versions and hashes to pin.nix file ..."
cat > pin.nix << EOF
{
  benchVersion = "$bench_version";
  erpnextVersion = "$erpnext_version";
  frappeVersion = "$frappe_version";
  hashes = {
    "benchSrcHash" = "$bench_src_hash";
    "erpnextSrcHash" = "$erpnext_src_hash";
    "erpnextYarnHash" = "$erpnext_yarn_hash";
    "frappeSrcHash" = "$frappe_src_hash";
    "frappeYarnHash" = "$frappe_yarn_hash";
  };
}
EOF