nix-daemon.sh

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

NIX_LINK=$HOME/.nix-profile
if [ -n "${XDG_STATE_HOME-}" ]; then
    NIX_LINK_NEW="$XDG_STATE_HOME/nix/profile"
else
    NIX_LINK_NEW=$HOME/.local/state/nix/profile
fi
if [ -e "$NIX_LINK_NEW" ]; then
    NIX_LINK="$NIX_LINK_NEW"
else
    if [ -t 2 ] && [ -e "$NIX_LINK_NEW" ]; then
        warning="\033[1;35mwarning:\033[0m"
        printf "$warning Both %s and legacy %s exist; using the latter.\n" "$NIX_LINK_NEW" "$NIX_LINK" 1>&2
        if [ "$(realpath "$NIX_LINK")" = "$(realpath "$NIX_LINK_NEW")" ]; then
            printf "         Since the profiles match, you can safely delete either of them.\n" 1>&2
        else
            # This should be an exceptionally rare occasion: the only way to get it would be to
            # 1. Update to newer Nix;
            # 2. Remove .nix-profile;
            # 3. Set the $NIX_LINK_NEW to something other than the default user profile;
            # 4. Roll back to older Nix.
            # If someone did all that, they can probably figure out how to migrate the profile.
            printf "$warning Profiles do not match. You should manually migrate from %s to %s.\n" "$NIX_LINK" "$NIX_LINK_NEW" 1>&2
        fi
    fi
fi

export NIX_PROFILES="/nix/var/nix/profiles/default $NIX_LINK"

# Set $NIX_SSL_CERT_FILE so that Nixpkgs applications like curl work.
if [ -n "${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.
  check_nix_profiles() {
    if [ -n "$ZSH_VERSION" ]; then
      # Zsh by default doesn't split words in unquoted parameter expansion.
      # Set local_options for these options to be reverted at the end of the function
      # and shwordsplit to force splitting words in $NIX_PROFILES below.
      setopt local_options shwordsplit
    fi
    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
  }
  check_nix_profiles
  unset -f check_nix_profiles
fi

export PATH="$NIX_LINK/bin:/nix/var/nix/profiles/default/bin:$PATH"
unset NIX_LINK