.envrc

ssh-add -K &> /dev/null || true

my_ssh_auth_sock=$SSH_AUTH_SOCK


# Usage: use nix_shell
#
# Works like use_nix, except that it's only rebuilt if the shell.nix or shell.nix file changes.
# This avoids scenarios where the nix-channel is being updated and all the projects now need to be re-built.
#
# To force the reload the derivation, run `touch shell.nix`
use_nix_shell() {
  local nixcache=".direnv.cache"
  local tempfile=

  if [[ ! -e "$nixcache" ]] || [[ ".envrc" -nt "$nixcache" ]] || [[ "shell.nix" -nt "$nixcache" ]] || [[ "shell.nix" -nt "$nixcache" ]]; then
    tempfile="$(mktemp "$nixcache.XXXXXX")"
    nix-shell --show-trace --run 'direnv dump' > "$tempfile" && mv "$tempfile" "$nixcache"
    rm -f "$tempfile"
    tempfile=
  fi
  direnv_load cat "$nixcache"
  for f in $(git ls-files '*.nix'); do
    watch_file $f
  done
}

# Configure a custom nix Cache
export NIX_CONF_DIR="$(pwd)"

use_nix_shell

export SSH_AUTH_SOCK=$my_ssh_auth_sock