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{
git,
jq,
lib,
nix,
nvd,
openssh,
symlinkJoin,
writeShellApplication,
writeTextDir,
xdg-utils,
}:
let
bin = writeShellApplication {
name = "nixfiles";
runtimeInputs = [
git
jq
nix
nvd
openssh
xdg-utils
];
# Shamelessly appropriated from https://github.com/ncfavier/config.
# Hopefully Naïm will not sue me for copyright infrigment.
text = ''
nixfiles="''${NIXFILES:-.}"
rebuild="nixos-rebuild"
rebuild_opts=(--fast --use-remote-sudo)
cmd=$1
shift
case $cmd in
repl|eval|nix-build|rev)
args=() flakeArgs=()
for arg do case $arg in
-w|--wip)
flakeArgs+=(--override-flake nixfiles "$nixfiles")
;;
*)
args+=("$arg")
;;
esac done
set -- "''${args[@]}"
;;&
compare)
if command -v xdg-open >/dev/null; then
open="xdg-open"
else
open="open"
fi
input=$1
# shellcheck disable=SC1090
. <(nix flake metadata --json nixfiles | jq -r --arg open "$open" --arg input "$input" '
def browse($url): @sh "$open \($url)";
.locks.nodes[$input] |
if .locked.type == "github" then
browse("https://github.com/\(.locked.owner)/\(.locked.repo)/compare/\(.locked.rev)...\(.original.ref // "master")")
elif .locked.type == "gitlab" then
browse("https://gitlab.com/\(.locked.owner)/\(.locked.repo)/-/compare/\(.locked.rev)...\(.original.ref // "master")")
else
"echo unsupported input type \(.locked.type) (supported: github, gitlab)"
end
')
;;
update)
if (( $# )); then
args=()
for input do args+=(--update-input "$input"); done
exec nix flake lock --refresh "''${args[@]}" "$nixfiles"
else
# https://github.com/NixOS/nix/issues/6095
exec nix flake update -v --refresh "$nixfiles"
fi
;;
rev)
if (( $# )); then
expr=inputs.''${1//'/'/.inputs.}.rev
else
expr=self.revision
fi
nix eval "''${flakeArgs[@]}" -f ~/.nix-defexpr --raw "$expr"
echo
;;
repl)
exec nix repl "''${flakeArgs[@]}" -f ~/.nix-defexpr "$@"
;;
eval)
exec nix eval "''${flakeArgs[@]}" -f ~/.nix-defexpr --json "$@" | jq -r .
;;
nix-build)
# https://github.com/NixOS/nix/issues/6661
exec nix-build --log-format bar-with-logs "''${flakeArgs[@]}" ~/.nix-defexpr -A "$@"
;;
specialise)
name=$1
shift
# Assumes that sudo is already configured. Has setuid baked in if needed and etc.
exec sudo /run/current-system/specialisation/"$name"/bin/switch-to-configuration switch
;;
revert)
exec sudo /nix/var/nix/profiles/system/bin/switch-to-configuration switch
;;
home)
attr=nixosConfigurations."$HOSTNAME".config.hm.home.activationPackage
export VERBOSE=1
exec nix shell -v ".#$attr" "$@" -c home-manager-generation
;;
diff)
exec nvd diff /run/current-system "$nixfiles/result"
;;
@*)
# Assumes that hosts are configured in the OpenSSH configuration.
host=''${cmd#@}
hostname=$(ssh -q "$host" 'echo "$HOSTNAME"')
exec "$rebuild" -v --flake "$nixfiles#$hostname" --target-host "$host" "''${rebuild_opts[@]}" --show-trace "$@"
;;
*)
exec "$rebuild" -v --flake "$nixfiles" "''${rebuild_opts[@]}" --show-trace "$cmd" "$@"
;;
esac
'';
};
bashCompletion = writeTextDir "/share/bash-completion/completions/nixfiles" ''
__compreply() {
local completion
while IFS= read -r completion; do
COMPREPLY+=("$completion")
done < <(compgen "$@" -- "$cur")
}
__complete_nix_cmd() {
local skip=$1
shift
COMP_WORDS=("$@" "''${COMP_WORDS[@]:skip}")
(( COMP_CWORD += $# - skip ))
_completion_loader nix
_complete_nix
}
_nixfiles() {
local cur prev words cword
local nixfiles="''${NIXFILES:-.}"
_init_completion -n ':=&'
if [[ "$cword" == 1 ]] || [[ "$cword" == 2 && "$prev" == @* ]]; then
if [[ $cur == @* ]]; then
_known_hosts_real -a -- "$cur"
else
__compreply -W 'compare update repl eval nix-build specialise revert home boot build build-vm build-vm-with-bootloader dry-activate dry-build edit switch test'
fi
else case ''${words[1]} in
compare|update|rev)
__complete_nix_cmd "$cword" nix flake lock "$nixfiles" --update-input
;;
repl|eval|nix-build)
__compreply -W '-w --wip'
;;&
repl)
__complete_nix_cmd 2 nix repl ~/.nix-defexpr
;;
eval)
__complete_nix_cmd 2 nix eval -f ~/.nix-defexpr --json
;;
build)
__complete_nix_cmd 2 nix build -f ~/.nix-defexpr --json
;;
home)
__complete_nix_cmd 2 nix shell "$nixfiles"
;;
switch)
__complete_nix_cmd 2 nix build "$nixfiles"
;;
esac fi
}
complete -F _nixfiles nixfiles
'';
in
symlinkJoin {
name = "nixfiles";
paths = [
bin
bashCompletion
];
meta = with lib; {
description = "A helper utility to manage NixOS configurations with Nix flakes";
homepage = "https://git.azahi.cc/nixfiles";
license = licenses.wtfpl;
platforms = platforms.unix;
maintainers = with maintainers; [ azahi ];
mainProgram = "nixfiles";
};
}
|
