Nix path setup file for fish (based on the bash version)

nix.fish

if [ -n "$HOME" ]
  set NIX_LINK "$HOME/.nix-profile"

  # Set the default profile.
  if not [ -L "$NIX_LINK" ]
    echo "creating $NIX_LINK" >&2
    set _NIX_DEF_LINK /nix/var/nix/profiles/default
    /nix/store/rznhi2hyzcgckk7yb2662lr57sb906ps-coreutils-8.24/bin/ln -s "$_NIX_DEF_LINK" "$NIX_LINK"
    end

    set -x PATH $NIX_LINK/bin $NIX_LINK/sbin $PATH

    # Subscribe the user to the Nixpkgs channel by default.
    if [ ! -e $HOME/.nix-channels ]
        echo "https://nixos.org/channels/nixpkgs-unstable nixpkgs" > $HOME/.nix-channels
    end

    # Append ~/.nix-defexpr/channels/nixpkgs to $NIX_PATH so that
    # <nixpkgs> paths work when the user has fetched the Nixpkgs
    # channel.
    set -x NIX_PATH (echo $NIX_PATH:)nixpkgs=$HOME/.nix-defexpr/channels/nixpkgs

    # Set $SSL_CERT_FILE so that Nixpkgs applications like curl work.
    if [ -e /etc/ssl/certs/ca-certificates.crt ] # NixOS, Ubuntu, Debian, Gentoo, Arch
        set -x SSL_CERT_FILE /etc/ssl/certs/ca-certificates.crt
    else if [ -e /etc/ssl/certs/ca-bundle.crt ] # Old NixOS
        set -x SSL_CERT_FILE /etc/ssl/certs/ca-bundle.crt
    else if [ -e /etc/pki/tls/certs/ca-bundle.crt ] # Fedora, CentOS
        set -x SSL_CERT_FILE /etc/pki/tls/certs/ca-bundle.crt
    else if [ -e "$NIX_LINK/etc/ssl/certs/ca-bundle.crt" ] # fall back to cacert in Nix profile
        set -x SSL_CERT_FILE "$NIX_LINK/etc/ssl/certs/ca-bundle.crt"
    else if [ -e "$NIX_LINK/etc/ca-bundle.crt" ] # old cacert in Nix profile
        set -x SSL_CERT_FILE "$NIX_LINK/etc/ca-bundle.crt"
    end
end