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