chore: add update script for opencode-antigravity-auth

pkgs/opencode-antigravity-auth/update.sh

@@ -0,0 +1,35 @@
+#!/usr/bin/env nix-shell
+#!nix-shell -i bash -p curl jq bun nix-prefetch
+
+set -euo pipefail
+
+cd "$(dirname "$0")"
+
+echo "Fetching latest version info from npm..."
+LATEST_VERSION=$(curl -s "https://registry.npmjs.org/opencode-antigravity-auth/latest" | jq -r .version)
+echo "Latest version is: $LATEST_VERSION"
+
+URL="https://registry.npmjs.org/opencode-antigravity-auth/-/opencode-antigravity-auth-${LATEST_VERSION}.tgz"
+
+echo "Fetching tarball to calculate hash..."
+# nix-prefetch-url outputs base32 sha256; convert to SRI
+HASH=$(nix hash convert --to sri --hash-algo sha256 $(nix-prefetch-url $URL 2>/dev/null))
+echo "New tarball hash: $HASH"
+
+echo "Updating default.nix..."
+sed -i "s/version = \".*\";/version = \"$LATEST_VERSION\";/" default.nix
+sed -i "s|hash = \"sha256-.*\";|hash = \"$HASH\";|" default.nix
+
+echo "Generating new bun.lock..."
+TMPDIR=$(mktemp -d)
+trap 'rm -rf "$TMPDIR"' EXIT
+
+curl -sL "$URL" | tar xz -C "$TMPDIR"
+pushd "$TMPDIR/package" > /dev/null
+bun install --lockfile-only --no-progress
+popd > /dev/null
+
+cp "$TMPDIR/package/bun.lock" ./bun.lock
+
+echo "Update complete! Remember to commit the changes:"
+echo "  git add default.nix bun.lock"