121 lines
3.7 KiB
Bash
121 lines
3.7 KiB
Bash
#! @shell@ -e
|
|
|
|
# Allow the location of NixOS sources and the system configuration
|
|
# file to be overridden.
|
|
NIXOS=${NIXOS:-@defaultNIXOS@}
|
|
NIXPKGS=${NIXPKGS:-@defaultNIXPKGS@}
|
|
NIXOS_CONFIG=${NIXOS_CONFIG:-/etc/nixos/configuration.nix}
|
|
|
|
showSyntax() {
|
|
# !!! more or less cut&paste from
|
|
# system/switch-to-configuration.sh (which we call, of course).
|
|
cat <<EOF
|
|
Usage: $0 [switch|boot|test|build|dry-run]
|
|
|
|
switch: make the configuration the boot default and activate now
|
|
boot: make the configuration the boot default
|
|
test: activate the configuration, but don't make it the boot default
|
|
build: build the configuration, but don't make it the default or
|
|
activate it
|
|
dry-run: just show what store paths would be built/downloaded
|
|
|
|
Environment variables affecting nixos-rebuild:
|
|
|
|
Path to NixOS: NIXOS=${NIXOS}
|
|
Path to Nixpkgs: NIXPKGS=${NIXPKGS}
|
|
Path to configuration: NIXOS_CONFIG=${NIXOS_CONFIG}
|
|
EOF
|
|
exit 1
|
|
}
|
|
|
|
|
|
# Parse the command line.
|
|
extraBuildFlags=
|
|
action=
|
|
|
|
for i in "$@"; do
|
|
if test "$i" = "--help"; then
|
|
showSyntax
|
|
elif test "$i" = switch -o "$i" = boot -o "$i" = test -o "$i" = build -o "$i" = dry-run; then
|
|
action="$i"
|
|
else
|
|
echo "$0: unknown option \`$i'"
|
|
exit 1
|
|
fi
|
|
done
|
|
|
|
if test -z "$action"; then showSyntax; fi
|
|
|
|
if test "$action" = dry-run; then
|
|
extraBuildFlags="$extraBuildFlags --dry-run"
|
|
fi
|
|
|
|
|
|
# If the Nix daemon is running, then use it. This allows us to use
|
|
# the latest Nix from Nixpkgs (below) for expression evaluation, while
|
|
# still using the old Nix (via the daemon) for actual store access.
|
|
# This matters if the new Nix in Nixpkgs has a schema change. It
|
|
# would upgrade the schema, which should only happen once we actually
|
|
# switch to the new configuration.
|
|
if initctl status nix-daemon 2>&1 | grep -q ' running'; then
|
|
export NIX_REMOTE=${NIX_REMOTE:-daemon}
|
|
fi
|
|
|
|
|
|
# Pull the manifests defined in the configuration (the "manifests"
|
|
# attribute). Wonderfully hacky.
|
|
if test "${NIXOS_PULL:-1}" != 0; then
|
|
manifests=$(nix-instantiate --eval-only --xml --strict $NIXOS -A manifests \
|
|
| grep '<string' | sed 's^.*"\(.*\)".*^\1^g')
|
|
|
|
mkdir -p /nix/var/nix/channel-cache
|
|
for i in $manifests; do
|
|
NIX_DOWNLOAD_CACHE=/nix/var/nix/channel-cache nix-pull $i || true
|
|
done
|
|
fi
|
|
|
|
|
|
# First build Nix, since NixOS may require a newer version than the
|
|
# current one. Of course, the same goes for Nixpkgs, but Nixpkgs is
|
|
# more conservative.
|
|
if test "${NIXOS_BUILD_NIX:-1}" != 0; then
|
|
if ! nix-build $NIXOS -A nixFallback -o $HOME/nix-tmp; then
|
|
nix-build $NIXPKGS -A nixUnstable -o $HOME/nix-tmp
|
|
fi
|
|
PATH=$HOME/nix-tmp/bin:$PATH
|
|
fi
|
|
|
|
|
|
# Either upgrade the configuration in the system profile (for "switch"
|
|
# or "boot"), or just build it and create a symlink "result" in the
|
|
# current directory (for "build" and "test").
|
|
if test "$action" = switch -o "$action" = boot; then
|
|
nix-env -p /nix/var/nix/profiles/system -f $NIXOS --set -A system $extraBuildFlags
|
|
pathToConfig=/nix/var/nix/profiles/system
|
|
elif test "$action" = test -o "$action" = build -o "$action" = dry-run; then
|
|
nix-build $NIXOS -A system -K -k $extraBuildFlags
|
|
pathToConfig=./result
|
|
else
|
|
showSyntax
|
|
fi
|
|
|
|
|
|
# If we're not just building, then make the new configuration the boot
|
|
# default and/or activate it now.
|
|
if test "$action" = switch -o "$action" = boot -o "$action" = test; then
|
|
$pathToConfig/bin/switch-to-configuration "$action"
|
|
fi
|
|
|
|
|
|
if test "$action" = "test"; then
|
|
cat >&2 <<EOF
|
|
|
|
Warning: if you remove or overwrite the symlink \`$pathToConfig', the
|
|
active system configuration may be garbage collected! This may render
|
|
the system inoperable (though a reboot will fix things).
|
|
EOF
|
|
fi
|
|
|
|
|
|
rm -f $HOME/nix-tmp
|