status-react/nix/scripts/purge.sh

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#!/usr/bin/env bash
# This script removes all Nix files.
GIT_ROOT=$(cd "${BASH_SOURCE%/*}" && git rev-parse --show-toplevel)
source "${GIT_ROOT}/nix/scripts/lib.sh"
source "${GIT_ROOT}/scripts/colors.sh"
nix_purge_linux_multi_user_service() {
NIX_SERVICES=(nix-daemon.service nix-daemon.socket)
for NIX_SERVICE in "${NIX_SERVICES[@]}"; do
sudo systemctl stop "${NIX_SERVICE}"
sudo systemctl disable "${NIX_SERVICE}"
done
sudo systemctl daemon-reload
}
nix_purge_linux_multi_user_users() {
for NIX_USER in $(awk -F: '/nixbld/{print $1}' /etc/passwd); do
sudo userdel "${NIX_USER}"
done
sudo groupdel nixbld
}
nix_purge_darwin_multi_user_service() {
cd /Library/LaunchDaemons
NIX_SERVICES=(org.nixos.darwin-store.plist org.nixos.nix-daemon.plist)
for NIX_SERVICE in "${NIX_SERVICES[@]}"; do
sudo launchctl unload "${NIX_SERVICE}"
sudo launchctl remove "${NIX_SERVICE}"
done
}
nix_purge_darwin_multi_user_users() {
for NIX_USER in $(dscl . list /Users | grep nixbld); do
sudo dscl . -delete "/Users/${NIX_USER}"
done
sudo dscl . -delete /Groups/nixbld
}
# This still leaves an empty /nix, which will disappear after reboot.
nix_purge_darwin_multi_user_volumes() {
sudo sed -i.bkp '/nix/d' /etc/synthetic.conf
sudo sed -i.bkp '/nix/d' /etc/fstab
sudo diskutil apfs deleteVolume /nix
echo -e "${YLW}You will need to reboot your system!${RST}" >&2
}
nix_purge_multi_user() {
if [[ $(uname -s) == "Darwin" ]]; then
nix_purge_darwin_multi_user_service
nix_purge_darwin_multi_user_users
nix_purge_darwin_multi_user_volumes
else
nix_purge_linux_multi_user_service
nix_purge_linux_multi_user_users
fi
sudo rm -fr /etc/nix
sudo rm -f /etc/profile.d/nix.sh*
# Restore old shell profiles
NIX_PROFILE_FILES=(
/etc/bash.bashrc /etc/bashrc /etc/bash/bashrc
/etc/zsh.zshhrc /etc/zshrc /etc/zsh/zshrc
)
for NIX_FILE in "${NIX_PROFILE_FILES[@]}"; do
if [[ -f "${NIX_FILE}.backup-before-nix" ]]; then
sudo mv -f "${NIX_FILE}.backup-before-nix" "${NIX_FILE}"
fi
done
}
nix_purge_user_profile() {
sudo rm -rf \
~/.nix-* \
~/.cache/nix \
~/.config/nixpkgs \
"${GIT_ROOT}/.nix-gcroots"
}
nix_purge_root() {
NIX_ROOT=$(nix_root)
if [[ -z "${NIX_ROOT}" ]]; then
echo -e "${RED}Unable to identify Nix root!${RST}" >&2
exit 1
fi
sudo rm -fr "${NIX_ROOT}"
}
# Don't run anything if script is just sourced.
if (return 0 2>/dev/null); then
echo -e "${YLW}Script sourced, not running purge.${RST}"
return
fi
# Confirm user decission, unless --force is used.
if [[ "${1}" != "--force" ]]; then
echo -e "${YLW}Are you sure you want to purge Nix?${RST}" >&2
read -p "[y/n]: " -n 1 -r
echo
if [[ $REPLY =~ ^[^Yy]$ ]]; then
echo -e "${GRN}Aborting Nix purge!${RST}" >&2
exit 0
fi
fi
NIX_INSTALL_TYPE=$(nix_install_type)
# Purging /nix on NixOS would be disasterous.
if [[ "${NIX_INSTALL_TYPE}" == "nixos" ]]; then
echo -e "${RED}You should not purge Nix files on NixOS!${RST}" >&2
exit
elif [[ "${NIX_INSTALL_TYPE}" == "none" ]] && [[ "${1}" != "--force" ]]; then
echo -e "${YLW}Nothing to remove, Nix not installed.${RST}" >&2
exit
elif [[ "${NIX_INSTALL_TYPE}" == "multi" ]] || [[ "${1}" == "--force" ]]; then
echo -e "${YLW}Detected multi-user Nix installation.${RST}" >&2
nix_purge_multi_user
elif [[ "${NIX_INSTALL_TYPE}" == "single" ]] || [[ "${1}" == "--force" ]]; then
echo -e "${YLW}Detected single-user Nix installation.${RST}" >&2
nix_purge_user_profile
fi
nix_purge_root
echo -e "${GRN}Purged all Nix files from your system.${RST}" >&2