status-mobile/nix/scripts/gcroots.sh

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#!/usr/bin/env bash
set -Ee
GIT_ROOT=$(cd "${BASH_SOURCE%/*}" && git rev-parse --show-toplevel)
source "${GIT_ROOT}/nix/scripts/source.sh"
source "${GIT_ROOT}/scripts/colors.sh"
_NIX_GCROOTS="${_NIX_GCROOTS:-${GIT_ROOT}/.nix-gcroots}"
TARGET="${1}"
shift
if [[ -z "${TARGET}" ]]; then
echo -e "${RED}No target specified for gcroots.sh!${RST}" >&2
exit 1
fi
# Creates a symlink to derivation in _NIX_GCROOTS directory.
# This prevents it from being removed by 'gc-collect-garbage'.
nix-instantiate --attr "${TARGET}" \
--add-root "${_NIX_GCROOTS}/${TARGET}" \
"${@}" "${GIT_ROOT}/default.nix" >/dev/null