# Function to configure brew constants.
configure_brew() {
  brew_path="$(command -v brew)"
  brew_path_dir="$(dirname "$brew_path")"
  brew_prefix="$brew_path_dir"/..
  brew_repo="$brew_path_dir/$(dirname "$(readlink "$brew_path")")"/..
  tap_dir="$brew_repo"/Library/Taps
  core_repo="$tap_dir"/homebrew/homebrew-core

  export HOMEBREW_CHANGE_ARCH_TO_ARM=1
  export HOMEBREW_DEVELOPER=1
  export HOMEBREW_NO_AUTO_UPDATE=1
  export HOMEBREW_NO_ENV_HINTS=1
  export HOMEBREW_NO_INSTALL_CLEANUP=1
  export HOMEBREW_NO_INSTALLED_DEPENDENTS_CHECK=1
  export brew_path
  export brew_path_dir
  export brew_prefix
  export brew_repo
  export tap_dir
  export core_repo
}

# Function to fetch a brew tap.
fetch_brew_tap() {
  tap=$1
  tap_user=$(dirname "$tap")
  tap_name=$(basename "$tap")
  mkdir -p "$tap_dir/$tap_user"
  branch="$(get -s -n "" "https://api.github.com/repos/$tap" | grep default_branch | cut -d: -f 2 | grep -Eo '[^\", ]+' | tr -d '\n')"
  get -s -n "" "https://github.com/$tap/archive/$branch.tar.gz" | sudo tar -xzf - -C "$tap_dir/$tap_user"
  sudo mv "$tap_dir/$tap_user/$tap_name-$branch" "$tap_dir/$tap_user/$tap_name"
}

# Function to add a brew tap.
add_brew_tap() {
  tap=$1
  if ! [ -d "$tap_dir/$tap" ]; then
    if [ "${runner:?}" = "self-hosted" ]; then
      brew tap "$tap" >/dev/null 2>&1
    else
      fetch_brew_tap "$tap" >/dev/null 2>&1
      if ! [ -d "$tap_dir/$tap" ]; then
        brew tap "$tap" >/dev/null 2>&1
      fi
    fi
  fi
}

# Function to configure brew constants.
configure_brew() {
  brew_path="$(command -v brew)"
  brew_path_dir="$(dirname "$brew_path")"
  brew_prefix="$brew_path_dir"/..
  brew_repo="$brew_path_dir/$(dirname "$(readlink "$brew_path")")"/..
  tap_dir="$brew_repo"/Library/Taps
  core_repo="$tap_dir"/homebrew/homebrew-core

  export HOMEBREW_CHANGE_ARCH_TO_ARM=1
  export HOMEBREW_DEVELOPER=1
  export HOMEBREW_NO_AUTO_UPDATE=1
  export HOMEBREW_NO_ENV_HINTS=1
  export HOMEBREW_NO_INSTALL_CLEANUP=1
  export HOMEBREW_NO_INSTALLED_DEPENDENTS_CHECK=1
  export brew_path
  export brew_path_dir
  export brew_prefix
  export brew_repo
  export tap_dir
  export core_repo
}