#!/usr/bin/env bash

########################################################################
# This install script will setup your development dependencies on OS X
# or Ubuntu. Ubuntu 18.04 is the only tested version.
#
# Usage: scripts/setup
########################################################################

_current_dir=$(cd "${BASH_SOURCE%/*}" && pwd)
source "$_current_dir/lib/setup/path-support.sh"

source_lib "output.sh"
source_lib "packages.sh"
source_lib "platform.sh"

exit_unless_os_supported

####
setup_header "Checking prerequisites..."

_need_curl=0
! is_nixos && ! program_exists nix && _need_curl=1

if _need_curl && ! program_exists "curl"; then
  cecho "@b@yellow[[Please install curl before running setup.]]"
  exit 1
fi

if is_linux && [ -z "$CI_ENVIRONMENT" ]; then
  watches=$(cat /proc/sys/fs/inotify/max_user_watches)
  required_watches=524288
  if [ $watches -lt $required_watches ]; then
    cecho "@b@cyan[[fs.inotify.max_user_watches limit is too low ($watches), increasing it]]"
    echo fs.inotify.max_user_watches=$required_watches | sudo tee -a /etc/sysctl.conf
    sudo sysctl -p
  fi

  if [ -f "/etc/arch-release" ]; then
    # Arch Linux
    userns=$(sysctl -n kernel.unprivileged_userns_clone)
    if [ "$userns" != '1' ]; then
      sudo sysctl kernel.unprivileged_userns_clone=1
    fi
  fi
fi

####
setup_header "Installing requirements..."

if [ "$IN_NIX_SHELL" != 'pure' ] && ! is_nixos && ! program_exists nix; then
  required_version=$(toolversion nix)
  NIX_INSTALLER_NO_MODIFY_PROFILE=1 bash <(curl https://nixos.org/releases/nix/nix-${required_version}/install) --no-daemon
  if [ $? -eq 0 ]; then
    echo -e "${YELLOW}**********************************************************************************************************"
    echo "The Nix package manager was successfully installed."
    echo -e "**********************************************************************************************************${NC}"
  else
    echo "Please see https://nixos.org/nix/manual/#chap-installation"
    exit
  fi
fi

####
setup_complete