#!/usr/bin/env -S nix shell nixpkgs#coreutils nixpkgs#bundix nixpkgs#nix-prefetch-github nixpkgs#jq unstable#yarn-berry_4.yarn-berry-fetcher nixpkgs#git -c bash

set -euo pipefail

cd "$(dirname "$0")"

echo "Retrieving latest TheEssem/mastodon commit..."
commit_json="$(curl -SsL 'https://api.github.com/repos/TheEssem/mastodon/branches/main')"
rev="$(jq -r '.commit.sha' <<<"$commit_json")"
echo "Latest commit is $rev."

echo
echo "Prefetching TheEssem/mastodon source via nix-prefetch-github..."
prefetch_json="$(nix-prefetch-github TheEssem mastodon --rev "$rev")"
hash="$(jq -r '.hash' <<<"$prefetch_json")"
echo "Source hash is $hash."

echo
echo "Cloning source into tempdir..."
tmpdir="$(mktemp -d)"
trap 'rm -rf "$tmpdir"' EXIT

git clone --quiet --depth 1 --branch main https://github.com/TheEssem/mastodon.git "$tmpdir"
pushd "$tmpdir" > /dev/null
git checkout "$rev"
popd > /dev/null

echo
echo "Generating gemset.nix..."
rm -f gemset.nix
bundix --quiet --lockfile "$tmpdir/Gemfile.lock" --gemfile "$tmpdir/Gemfile"

echo
echo "Generating missing-hashes.json for yarn..."
rm -f missing-hashes.json
yarn-berry-fetcher missing-hashes "$tmpdir/yarn.lock" > missing-hashes.json 2>/dev/null

echo
echo "Prefetching yarn deps..."
yarn_hash="$(yarn-berry-fetcher prefetch "$tmpdir/yarn.lock" ./missing-hashes.json 2>/dev/null)"

echo
echo "Generating version_data.nix..."
cat > version_data.nix <<EOF
# This file was generated by update.sh.
{
  rev = "$rev";
  hash = "$hash";
  yarnHash = "$yarn_hash";
}
EOF

echo
echo "Done."