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#!/usr/bin/env bash
# Remove old NixOS, home-manager and user profile generations, then run
# a full garbage collection and store optimisation.
set -euo pipefail
info() { printf '\033[1;34m==>\033[0m %s\n' "$*"; }
warn() { printf '\033[1;33m==> warning:\033[0m %s\n' "$*" >&2; }
error() { printf '\033[1;31m==> error:\033[0m %s\n' "$*" >&2; }
die() { error "$*"; exit 1; }
info "Starting Nix Deep Clean (keeping only current generations)"
if [[ $EUID -eq 0 ]]; then
die "Do not run this script with sudo.
Run it as your normal user; it will ask for sudo when required."
fi
info "Removing old NixOS system generations..."
sudo nix-env -p /nix/var/nix/profiles/system --delete-generations +1
info "Removing old Home Manager generations..."
if command -v home-manager &> /dev/null; then
home-manager generations | \
awk 'NR>1 {print $1}' | \
xargs -r home-manager remove-generations
fi
info "Removing old user profile generations..."
nix-env --delete-generations +1
info "Removing result symlinks..."
find . -name "result" -type l -delete
info "Running garbage collector..."
sudo nix-collect-garbage -d
nix-collect-garbage -d
info "Optimising Nix store..."
nix store optimise
info "Cleanup Complete."
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