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#! @shell@ -e
showSyntax() {
exec man nixos-rebuild
exit 1
}
# Parse the command line.
extraBuildFlags=()
action=
buildNix=1
rollback=
upgrade=
repair=
profile=/nix/var/nix/profiles/system
while [ "$#" -gt 0 ]; do
i="$1"; shift 1
case "$i" in
--help)
showSyntax
;;
switch|boot|test|build|dry-run|build-vm|build-vm-with-bootloader)
action="$i"
;;
--install-grub)
export NIXOS_INSTALL_GRUB=1
;;
--no-build-nix)
buildNix=
;;
--rollback)
rollback=1
;;
--upgrade)
upgrade=1
;;
--repair)
repair=1
extraBuildFlags+=("$i")
;;
--show-trace|--no-build-hook|--keep-failed|-K|--keep-going|-k|--verbose|-v|-vv|-vvv|-vvvv|-vvvvv|--fallback|--repair)
extraBuildFlags+=("$i")
;;
--max-jobs|-j|--cores|-I)
j="$1"; shift 1
extraBuildFlags+=("$i" "$j")
;;
--option)
j="$1"; shift 1
k="$1"; shift 1
extraBuildFlags+=("$i" "$j" "$k")
;;
--fast)
buildNix=
extraBuildFlags+=(--show-trace)
;;
--profile-name|-p)
if [ -z "$1" ]; then
echo "$0: ‘--profile-name’ requires an argument"
exit 1
fi
if [ "$1" != system ]; then
profile="/nix/var/nix/profiles/system-profiles/$1"
mkdir -p -m 0755 "$(dirname "$profile")"
fi
shift 1
;;
*)
echo "$0: unknown option \`$i'"
exit 1
;;
esac
done
if [ -z "$action" ]; then showSyntax; fi
if [ -n "$rollback" ]; then
buildNix=
fi
tmpDir=$(mktemp -t -d nixos-rebuild.XXXXXX)
trap 'rm -rf "$tmpDir"' EXIT
# If the Nix daemon is running, then use it. This allows us to use
# the latest Nix from Nixpkgs (below) for expression evaluation, while
# still using the old Nix (via the daemon) for actual store access.
# This matters if the new Nix in Nixpkgs has a schema change. It
# would upgrade the schema, which should only happen once we actually
# switch to the new configuration.
# If --repair is given, don't try to use the Nix daemon, because the
# flag can only be used directly.
if [ -z "$repair" ] && systemctl show nix-daemon.socket nix-daemon.service | grep -q ActiveState=active; then
export NIX_REMOTE=${NIX_REMOTE:-daemon}
fi
# If ‘--upgrade’ is given, run ‘nix-channel --update nixos’.
if [ -n "$upgrade" ]; then
nix-channel --update nixos
fi
# First build Nix, since NixOS may require a newer version than the
# current one. Of course, the same goes for Nixpkgs, but Nixpkgs is
# more conservative.
if [ "$action" != dry-run -a -n "$buildNix" ]; then
echo "building Nix..." >&2
if ! nix-build '<nixpkgs/nixos>' -A config.nix.package -o $tmpDir/nix "${extraBuildFlags[@]}" > /dev/null; then
if ! nix-build '<nixpkgs/nixos>' -A nixFallback -o $tmpDir/nix "${extraBuildFlags[@]}" > /dev/null; then
nix-build '<nixpkgs>' -A nixUnstable -o $tmpDir/nix "${extraBuildFlags[@]}" > /dev/null
fi
fi
PATH=$tmpDir/nix/bin:$PATH
fi
# Update the version suffix if we're building from Git (so that
# nixos-version shows something useful).
if nixpkgs=$(nix-instantiate --find-file nixpkgs "${extraBuildFlags[@]}"); then
suffix=$(@shell@ $nixpkgs/nixos/modules/installer/tools/get-version-suffix "${extraBuildFlags[@]}" || true)
if [ -n "$suffix" ]; then
echo -n "$suffix" > "$nixpkgs/.version-suffix" || true
fi
fi
if [ "$action" = dry-run ]; then
extraBuildFlags+=(--dry-run)
fi
# Either upgrade the configuration in the system profile (for "switch"
# or "boot"), or just build it and create a symlink "result" in the
# current directory (for "build" and "test").
if [ -z "$rollback" ]; then
echo "building the system configuration..." >&2
if [ "$action" = switch -o "$action" = boot ]; then
nix-env "${extraBuildFlags[@]}" -p "$profile" -f '<nixpkgs/nixos>' --set -A system
pathToConfig="$profile"
elif [ "$action" = test -o "$action" = build -o "$action" = dry-run ]; then
nix-build '<nixpkgs/nixos>' -A system -K -k "${extraBuildFlags[@]}" > /dev/null
pathToConfig=./result
elif [ "$action" = build-vm ]; then
nix-build '<nixpkgs/nixos>' -A vm -K -k "${extraBuildFlags[@]}" > /dev/null
pathToConfig=./result
elif [ "$action" = build-vm-with-bootloader ]; then
nix-build '<nixpkgs/nixos>' -A vmWithBootLoader -K -k "${extraBuildFlags[@]}" > /dev/null
pathToConfig=./result
else
showSyntax
fi
else # [ -n "$rollback" ]
if [ "$action" = switch -o "$action" = boot ]; then
nix-env --rollback -p "$profile"
pathToConfig="$profile"
elif [ "$action" = test -o "$action" = build ]; then
systemNumber=$(
nix-env -p "$profile" --list-generations |
sed -n '/current/ {g; p;}; s/ *\([0-9]*\).*/\1/; h'
)
ln -sT "$profile"-${systemNumber}-link ./result
pathToConfig=./result
else
showSyntax
fi
fi
# If we're not just building, then make the new configuration the boot
# default and/or activate it now.
if [ "$action" = switch -o "$action" = boot -o "$action" = test ]; then
$pathToConfig/bin/switch-to-configuration "$action"
fi
if [ "$action" = build-vm ]; then
cat >&2 <<EOF
Done. The virtual machine can be started by running $(echo $pathToConfig/bin/run-*-vm).
EOF
fi
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