# Only execute this file once per shell.
if [ -n "${__ETC_PROFILE_NIX_SOURCED:-}" ]; then return; fi
__ETC_PROFILE_NIX_SOURCED=1

# Set up secure multi-user builds: non-root users build through the
# Nix daemon.
if [ "$USER" != root -o ! -w /nix/var/nix/db ]; then
    export NIX_REMOTE=daemon
fi

export NIX_USER_PROFILE_DIR="/nix/var/nix/profiles/per-user/$USER"
export NIX_PROFILES="/nix/var/nix/profiles/default $HOME/.nix-profile"

# Set up the per-user profile.
mkdir -m 0755 -p $NIX_USER_PROFILE_DIR
if ! test -O "$NIX_USER_PROFILE_DIR"; then
    echo "WARNING: bad ownership on $NIX_USER_PROFILE_DIR" >&2
fi

if test -w $HOME; then
  if ! test -L $HOME/.nix-profile; then
      if test "$USER" != root; then
          ln -s $NIX_USER_PROFILE_DIR/profile $HOME/.nix-profile
      else
          # Root installs in the system-wide profile by default.
          ln -s /nix/var/nix/profiles/default $HOME/.nix-profile
      fi
  fi

  # Subscribe the root user to the NixOS channel by default.
  if [ "$USER" = root -a ! -e $HOME/.nix-channels ]; then
      echo "https://nixos.org/channels/nixpkgs-unstable nixpkgs" > $HOME/.nix-channels
  fi

  # Create the per-user garbage collector roots directory.
  NIX_USER_GCROOTS_DIR=/nix/var/nix/gcroots/per-user/$USER
  mkdir -m 0755 -p $NIX_USER_GCROOTS_DIR
  if ! test -O "$NIX_USER_GCROOTS_DIR"; then
      echo "WARNING: bad ownership on $NIX_USER_GCROOTS_DIR" >&2
  fi

  # Set up a default Nix expression from which to install stuff.
  if [ ! -e $HOME/.nix-defexpr -o -L $HOME/.nix-defexpr ]; then
      rm -f $HOME/.nix-defexpr
      mkdir -p $HOME/.nix-defexpr
      if [ "$USER" != root ]; then
          ln -s /nix/var/nix/profiles/per-user/root/channels $HOME/.nix-defexpr/channels_root
      fi
  fi
fi


# Set $NIX_SSL_CERT_FILE so that Nixpkgs applications like curl work.
if [ ! -z "${NIX_SSL_CERT_FILE:-}" ]; then
    : # Allow users to override the NIX_SSL_CERT_FILE
elif [ -e /etc/ssl/certs/ca-certificates.crt ]; then # NixOS, Ubuntu, Debian, Gentoo, Arch
    export NIX_SSL_CERT_FILE=/etc/ssl/certs/ca-certificates.crt
elif [ -e /etc/ssl/ca-bundle.pem ]; then # openSUSE Tumbleweed
    export NIX_SSL_CERT_FILE=/etc/ssl/ca-bundle.pem
elif [ -e /etc/ssl/certs/ca-bundle.crt ]; then # Old NixOS
    export NIX_SSL_CERT_FILE=/etc/ssl/certs/ca-bundle.crt
elif [ -e /etc/pki/tls/certs/ca-bundle.crt ]; then # Fedora, CentOS
    export NIX_SSL_CERT_FILE=/etc/pki/tls/certs/ca-bundle.crt
else
  # Fall back to what is in the nix profiles, favouring whatever is defined last.
  for i in $NIX_PROFILES; do
    if [ -e $i/etc/ssl/certs/ca-bundle.crt ]; then
      export NIX_SSL_CERT_FILE=$i/etc/ssl/certs/ca-bundle.crt
    fi
  done
fi

export NIX_PATH="nixpkgs=/nix/var/nix/profiles/per-user/root/channels/nixpkgs:/nix/var/nix/profiles/per-user/root/channels"
export PATH="$HOME/.nix-profile/bin:/nix/var/nix/profiles/default/bin:$PATH"
