nix/scripts/gcroots.sh from status-im/status-go

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 --add-root "${_NIX_GCROOTS}/${TARGET}" \
    "${@}" "${GIT_ROOT}/shell.nix" >/dev/null