132 lines
4.2 KiB
Bash
Executable file
132 lines
4.2 KiB
Bash
Executable file
#!/usr/bin/env zsh
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# I don't believe the interface for Nix's utility scripts are very good. Guix's,
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# on the other hand, is excellent. Management of your OS is done by a single
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# program with simpler, more intuitive commands. This script is a rudimentary
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# attempt at giving me that.
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#
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# dots cd|check -> nix flake check $DOTFILES
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# dots sh|show -> nix flake show $DOTFILES
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# dots u|update -> nix flake update --recreate-lock-file $DOTFILES
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# dots re|rebuild -> nixos-rebuild --flake $DOTFILES#$HOSTNAME ${1:-build}
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# dots rollback -> dots rebuild --rollback switch
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# dots vm -> dots rebuild vm
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# dots up|upgrade -> dots update && dots rebuild switch
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# dots gc -> GC user profile, optimise nix store
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# sudo dots gc -> GC, optimise nix store, & delete old boot entries
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# dots push REMOTE -> push flake to remote (over SSH) and rebuild remotely
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# dots gen|generations -> explore, manage, diff across generations (WIP)
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#
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# dots (with no sub-command) can also be used as an alternative to nix-env:
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#
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# dots -q
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# dots -iA nixos.htop
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# dots -e htop
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set -e
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REMOTE=${REMOTE:-"~/.config/dotfiles"}
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DOTFILES="${0:a:h}/.."
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#
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function main {
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function _do { [[ $DRYRUN ]] && echo "$@" || "$@" }
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### Helpers
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function _usage {
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echo "Usage: dots COMMAND [FLAGS...] [ARGS...]"
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echo
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echo "Available commands:"
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echo " init TODO"
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echo " upgrade (up) TODO"
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echo " rebuild (re) TODO"
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echo " rollback TODO"
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echo " gc TODO"
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echo " vm TODO"
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echo " push Push thie config to a remote NixOS system and rebuild it"
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echo " generations (gen) TODO"
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}
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function _rebuild {
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# Move to $DOTFILES to prevent polluting the system with result links
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pushd $DOTFILES >/dev/null
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_do sudo nixos-rebuild --flake ".#$HOSTNAME" ${@:-build}
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popd >/dev/null
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}
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function _update {
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echo "Updating NixOS flake"
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_do nix flake update --recreate-lock-file "$DOTFILES"
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}
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function _gc {
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if [[ $EUID == 0 ]]; then
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echo "Cleaning up your system..."
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_do sudo nix-collect-garbage ${@:--d}
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# nix-collect-garbage is a Nix tool, not a NixOS tool. It won't delete old
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# boot entries until you do a nixos-rebuild (which means we'll always have
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# 2 boot entries at any time). Instead, we properly delete them by
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# reloading the current environment.
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_do sudo nix-env --delete-generations old --profile /nix/var/nix/profiles/system
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_do sudo /nix/var/nix/profiles/system/bin/switch-to-configuration switch
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else
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echo "Cleaning up your user profile..."
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_do nix-collect-garbage ${@:--d}
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fi
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_do nix-store --optimise
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}
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###
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cmd="$1"
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[[ $# > 0 ]] && shift
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case "$cmd" in
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# TODO Repl/shell for nixos+dotfiles
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# sh|shell) _do nix-shell "$@" ;;
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# repl) _do nix develop "$@" ;;
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ch|check) _do nix flake check "$DOTFILES";;
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sh|show) _do nix flake show "$DOTFILES" ;;
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re|rebuild) _rebuild "${@:-switch}" ;;
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rollback) _rebuild --rollback switch ;;
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vm) _rebuild "$@" vm ;;
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u|update) _update "$@" ;;
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up|upgrade) _update && _rebuild switch ;;
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gc) _gc "$@" ;;
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push)
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rsync -avzh ./ "$1:$REMOTE/"
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ssh -t -l "$USERNAME" "$1" "$REMOTE/hey re" "${@[2,-1]}"
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;;
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gen|generations)
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profile=/nix/var/nix/profiles/system
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case "$1" in
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switch) >&2 echo "Targeted rollback not supported yet" ;; # TODO Is this true?
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diff)
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to=/nix/var/nix/profiles/system-${2}-link
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diff \
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<(nix-store -q --references $profile) \
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<(nix-store -q --references $to)
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;;
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remove)
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shift
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_do sudo nix-env --delete-generations --profile $profile $@
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;;
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"")
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_do sudo nix-env --list-generations --profile $profile
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;;
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esac
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;;
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h|help|-h|--help) _usage ;;
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-*) _do nix-env "$cmd" "$@" ;;
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"") _usage ;;
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*) echo "Couldn't find command: $cmd" 1>&2
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exit 1
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;;
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esac
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}
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main "$@"
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