nixos-config/modules/system/applications/melonloader/update.sh

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#!/usr/bin/env nix-shell
#!nix-shell -I nixpkgs=./. -i bash -p curl jq common-updater-scripts
#shellcheck shell=bash
# Implementation lovingly referenced and adapted from cavalier package's update.sh
set -eu -o pipefail
version=$(curl -s ${GITHUB_TOKEN:+-u ":$GITHUB_TOKEN"} \
https://api.github.com/repos/LavaGang/MelonLoader.Installer/releases/latest | jq -e -r .tag_name)
old_version=$(nix-instantiate --eval -A melonloader-installer.version | jq -e -r)
if [[ $version == "$old_version" ]]; then
echo "New version same as old version, nothing to do." >&2
exit 0
fi
update-source-version melonloader-installer "$version"
$(nix-build -A melonloader-installer.fetch-deps --no-out-link) "$(dirname -- "${BASH_SOURCE[0]}")/deps.json"