Initial commit of a working Chucya flake?

chuckya/update.sh

@@ -0,0 +1,54 @@
+#!/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."