Hi,
We’re using Nix for managing dependencies for our team’s project. Though from time to time some members have random issues, and the easiest solution is just re-installing Nix.
But unfortunately, the official install command-lines (Download Nix / NixOS | Nix & NixOS) refuse to install if it’s already installed, and there is no uninstall script available to my knowledge.
So the script below was my attempt to create a no-interrupt install & reinstall script, and it sort of worked. Though I wish there is a better way than relying on this half-baked hacky script.
Any advice? Thanks in advance!
#!/usr/bin/env bash
set -Eeuxo pipefail
# Supported OS check
case "$(uname)" in
Linux)
if ! [ -x "$(command -v apt-get)" ]; then
echo 'Only Debain based linux are supported.'
exit 1
fi
;;
Darwin)
;;
*)
echo "Unsupported OS"
exit 1
;;
esac
if [[ "$(uname)" == "Linux" ]]; then
# Install `sudo` command for container build.
(apt-get update && apt-get install -y sudo) && :
# Deps needed to download & run Nix install script.
sudo apt-get install -y curl xz-utils
fi
# Stop Nix services
case "$(uname)" in
Linux)
# https://github.com/NixOS/nix/blob/b7e712f9fd3b35e7b75180fcfbe90dce6c9b06a4/scripts/install-systemd-multi-user.sh
sudo systemctl stop nix-daemon.socket || :
sudo systemctl stop nix-daemon.service || :
sudo systemctl disable nix-daemon.socket || :
sudo systemctl disable nix-daemon.service || :
sudo systemctl daemon-reload || :
;;
Darwin)
# https://github.com/NixOS/nix/blob/b7e712f9fd3b35e7b75180fcfbe90dce6c9b06a4/doc/manual/src/installation/uninstall.md
sudo launchctl unload /Library/LaunchDaemons/org.nixos.nix-daemon.plist || :
sudo rm /Library/LaunchDaemons/org.nixos.nix-daemon.plist || :
sudo launchctl unload /Library/LaunchDaemons/org.nixos.darwin-store.plist || :
sudo rm /Library/LaunchDaemons/org.nixos.darwin-store.plist || :
;;
esac
# If Nix is previously installed, new nix installation will complain these files
# already exist and fail. So restore them if they exist
sudo mv /etc/zshrc.backup-before-nix /etc/zshrc || :
sudo mv /etc/bashrc.backup-before-nix /etc/bashrc || :
sudo mv /etc/bash.bashrc.backup-before-nix /etc/bash.bashrc || :
sudo mv /etc/profile.d/nix.sh.backup-before-nix /etc/profile.d/nix.sh || :
# Install Nix https://nixos.org/download.html
sh <(curl -L https://nixos.org/nix/install --connect-timeout 5 --retry 3) --daemon --no-channel-add --no-modify-profile --yes
set +u # the following script has an intended unbound variable.
# shellcheck disable=SC1091 # /nix/var/nix/profiles/default/etc/profile.d/nix-daemon.sh is generated.
. /nix/var/nix/profiles/default/etc/profile.d/nix-daemon.sh
set -u
# https://nixos.org/manual/nix/stable/command-ref/conf-file.html
mkdir -p ~/.config/nix/
echo "experimental-features = nix-command flakes" > ~/.config/nix/nix.conf
