update.sh

#!/usr/bin/env bash

set -e

BRANCH="nixos-unstable"
REMOTE="origin"
NIXPKGS="/nix/nixpkgs"

git submodule update --recursive --remote
nix flake update
git diff flake.lock
command -v niv && niv update
git diff nix/sources.json

if [[ -e "$NIXPKGS" ]]; then
  pushd . >& /dev/null
  cd "$NIXPKGS"

  current_branch="$(sudo git symbolic-ref --short HEAD 2>/dev/null)"
  if [[ $current_branch != "$BRANCH" ]]; then
    sudo git checkout "$BRANCH"
  fi

  sudo git fetch $REMOTE
  if sudo git diff $BRANCH $REMOTE/$BRANCH --quiet --exit-code; then
    echo "nixpkgs already up to date";
  else
    sudo git diff $BRANCH $REMOTE/$BRANCH --stat
  fi

  sudo git pull
  popd

  if [[ -e "/etc/nixos/options.json" ]]; then
    nix-build "$NIXPKGS/nixos/release.nix" -A options -o tmp/options
    diff -u --color=always <(jq keys /etc/nixos/options.json) <(jq keys tmp/options/share/doc/nixos/options.json) | less
    rm tmp/options
  fi
fi