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|
#! @runtimeShell@
# shellcheck shell=bash
if [ -x "@runtimeShell@" ]; then export SHELL="@runtimeShell@"; fi;
set -e
set -o pipefail
shopt -s inherit_errexit
export PATH=@path@:$PATH
showSyntax() {
exec man nixos-rebuild
exit 1
}
# Parse the command line.
origArgs=("$@")
copyFlags=()
extraBuildFlags=()
lockFlags=()
flakeFlags=(--extra-experimental-features 'nix-command flakes')
action=
buildNix=1
fast=
rollback=
upgrade=
upgrade_all=
profile=/nix/var/nix/profiles/system
specialisation=
buildHost=
targetHost=
remoteSudo=
verboseScript=
noFlake=
# comma separated list of vars to preserve when using sudo
preservedSudoVars=NIXOS_INSTALL_BOOTLOADER
json=
# log the given argument to stderr
log() {
echo "$@" >&2
}
while [ "$#" -gt 0 ]; do
i="$1"; shift 1
case "$i" in
--help)
showSyntax
;;
switch|boot|test|build|edit|repl|dry-build|dry-run|dry-activate|build-vm|build-vm-with-bootloader|list-generations)
if [ "$i" = dry-run ]; then i=dry-build; fi
# exactly one action mandatory, bail out if multiple are given
if [ -n "$action" ]; then showSyntax; fi
action="$i"
;;
--install-grub)
log "$0: --install-grub deprecated, use --install-bootloader instead"
export NIXOS_INSTALL_BOOTLOADER=1
;;
--install-bootloader)
export NIXOS_INSTALL_BOOTLOADER=1
;;
--no-build-nix)
buildNix=
;;
--rollback)
rollback=1
;;
--upgrade)
upgrade=1
;;
--upgrade-all)
upgrade=1
upgrade_all=1
;;
--use-substitutes|--substitute-on-destination|-s)
copyFlags+=("-s")
;;
-I|--max-jobs|-j|--cores|--builders|--log-format)
j="$1"; shift 1
extraBuildFlags+=("$i" "$j")
;;
--accept-flake-config|-j*|--quiet|--print-build-logs|-L|--no-build-output|-Q| --show-trace|--keep-going|-k|--keep-failed|-K|--fallback|--refresh|--repair|--impure|--offline|--no-net)
extraBuildFlags+=("$i")
;;
--verbose|-v|-vv|-vvv|-vvvv|-vvvvv)
verboseScript="true"
extraBuildFlags+=("$i")
;;
--option)
j="$1"; shift 1
k="$1"; shift 1
extraBuildFlags+=("$i" "$j" "$k")
;;
--fast)
buildNix=
fast=1
;;
--profile-name|-p)
if [ -z "$1" ]; then
log "$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
;;
--specialisation|-c)
if [ -z "$1" ]; then
log "$0: ‘--specialisation’ requires an argument"
exit 1
fi
specialisation="$1"
shift 1
;;
--build-host)
buildHost="$1"
shift 1
;;
--target-host)
targetHost="$1"
shift 1
;;
--use-remote-sudo)
remoteSudo=1
;;
--flake)
flake="$1"
shift 1
;;
--no-flake)
noFlake=1
;;
--recreate-lock-file|--no-update-lock-file|--no-write-lock-file|--no-registries|--commit-lock-file)
lockFlags+=("$i")
;;
--update-input)
j="$1"; shift 1
lockFlags+=("$i" "$j")
;;
--override-input)
j="$1"; shift 1
k="$1"; shift 1
lockFlags+=("$i" "$j" "$k")
;;
--json)
json=1
;;
*)
log "$0: unknown option \`$i'"
exit 1
;;
esac
done
sudoCommand=(sudo --preserve-env="$preservedSudoVars" --)
if [[ -n "$SUDO_USER" ]]; then
useSudo=1
fi
# log the given argument to stderr if verbose mode is on
logVerbose() {
if [ -n "$verboseScript" ]; then
echo "$@" >&2
fi
}
# Run a command, logging it first if verbose mode is on
runCmd() {
logVerbose "$" "$@"
"$@"
}
buildHostCmd() {
local c
if [[ "${useSudo:-x}" = 1 ]]; then
c=("${sudoCommand[@]}")
else
c=()
fi
if [ -z "$buildHost" ]; then
runCmd "$@"
elif [ -n "$remoteNix" ]; then
runCmd ssh $SSHOPTS "$buildHost" "${c[@]}" env PATH="$remoteNix":'$PATH' "$@"
else
runCmd ssh $SSHOPTS "$buildHost" "${c[@]}" "$@"
fi
}
targetHostCmd() {
local c
if [[ "${useSudo:-x}" = 1 ]]; then
c=("${sudoCommand[@]}")
else
c=()
fi
if [ -z "$targetHost" ]; then
runCmd "${c[@]}" "$@"
else
runCmd ssh $SSHOPTS "$targetHost" "${c[@]}" "$@"
fi
}
targetHostSudoCmd() {
if [ -n "$remoteSudo" ]; then
useSudo=1 SSHOPTS="$SSHOPTS -t" targetHostCmd "$@"
else
# While a tty might not be necessary, we apply it to be consistent with
# sudo usage, and an experience that is more consistent with local deployment.
SSHOPTS="$SSHOPTS -t" targetHostCmd "$@"
fi
}
copyToTarget() {
if ! [ "$targetHost" = "$buildHost" ]; then
if [ -z "$targetHost" ]; then
logVerbose "Running nix-copy-closure with these NIX_SSHOPTS: $SSHOPTS"
NIX_SSHOPTS=$SSHOPTS runCmd nix-copy-closure "${copyFlags[@]}" --from "$buildHost" "$1"
elif [ -z "$buildHost" ]; then
logVerbose "Running nix-copy-closure with these NIX_SSHOPTS: $SSHOPTS"
NIX_SSHOPTS=$SSHOPTS runCmd nix-copy-closure "${copyFlags[@]}" --to "$targetHost" "$1"
else
buildHostCmd nix-copy-closure "${copyFlags[@]}" --to "$targetHost" "$1"
fi
fi
}
nixBuild() {
logVerbose "Building in legacy (non-flake) mode."
if [ -z "$buildHost" ]; then
logVerbose "No --build-host given, running nix-build locally"
runCmd nix-build "$@"
else
logVerbose "buildHost set to \"$buildHost\", running nix-build remotely"
local instArgs=()
local buildArgs=()
local drv=
while [ "$#" -gt 0 ]; do
local i="$1"; shift 1
case "$i" in
-o)
local out="$1"; shift 1
buildArgs+=("--add-root" "$out" "--indirect")
;;
-A)
local j="$1"; shift 1
instArgs+=("$i" "$j")
;;
-I) # We don't want this in buildArgs
shift 1
;;
--no-out-link) # We don't want this in buildArgs
;;
"<"*) # nix paths
instArgs+=("$i")
;;
*)
buildArgs+=("$i")
;;
esac
done
drv="$(runCmd nix-instantiate "${instArgs[@]}" "${extraBuildFlags[@]}")"
if [ -a "$drv" ]; then
logVerbose "Running nix-copy-closure with these NIX_SSHOPTS: $SSHOPTS"
NIX_SSHOPTS=$SSHOPTS runCmd nix-copy-closure --to "$buildHost" "$drv"
buildHostCmd nix-store -r "$drv" "${buildArgs[@]}"
else
log "nix-instantiate failed"
exit 1
fi
fi
}
nixFlakeBuild() {
logVerbose "Building in flake mode."
if [[ -z "$buildHost" && -z "$targetHost" && "$action" != switch && "$action" != boot && "$action" != test && "$action" != dry-activate ]]
then
runCmd nix "${flakeFlags[@]}" build "$@"
readlink -f ./result
elif [ -z "$buildHost" ]; then
runCmd nix "${flakeFlags[@]}" build "$@" --out-link "${tmpDir}/result"
readlink -f "${tmpDir}/result"
else
local attr="$1"
shift 1
local evalArgs=()
local buildArgs=()
local drv=
while [ "$#" -gt 0 ]; do
local i="$1"; shift 1
case "$i" in
--recreate-lock-file|--no-update-lock-file|--no-write-lock-file|--no-registries|--commit-lock-file)
evalArgs+=("$i")
;;
--update-input)
local j="$1"; shift 1
evalArgs+=("$i" "$j")
;;
--override-input)
local j="$1"; shift 1
local k="$1"; shift 1
evalArgs+=("$i" "$j" "$k")
;;
--impure) # We don't want this in buildArgs, it's only needed at evaluation time, and unsupported during realisation
;;
*)
buildArgs+=("$i")
;;
esac
done
drv="$(runCmd nix "${flakeFlags[@]}" eval --raw "${attr}.drvPath" "${evalArgs[@]}" "${extraBuildFlags[@]}")"
if [ -a "$drv" ]; then
logVerbose "Running nix with these NIX_SSHOPTS: $SSHOPTS"
NIX_SSHOPTS=$SSHOPTS runCmd nix "${flakeFlags[@]}" copy "${copyFlags[@]}" --derivation --to "ssh://$buildHost" "$drv"
buildHostCmd nix-store -r "$drv" "${buildArgs[@]}"
else
log "nix eval failed"
exit 1
fi
fi
}
if [ -z "$action" ]; then showSyntax; fi
# Only run shell scripts from the Nixpkgs tree if the action is
# "switch", "boot", or "test". With other actions (such as "build"),
# the user may reasonably expect that no code from the Nixpkgs tree is
# executed, so it's safe to run nixos-rebuild against a potentially
# untrusted tree.
canRun=
if [[ "$action" = switch || "$action" = boot || "$action" = test ]]; then
canRun=1
fi
# If ‘--upgrade’ or `--upgrade-all` is given,
# run ‘nix-channel --update nixos’.
if [[ -n $upgrade && -z $_NIXOS_REBUILD_REEXEC && -z $flake ]]; then
# If --upgrade-all is passed, or there are other channels that
# contain a file called ".update-on-nixos-rebuild", update them as
# well. Also upgrade the nixos channel.
for channelpath in /nix/var/nix/profiles/per-user/root/channels/*; do
channel_name=$(basename "$channelpath")
if [[ "$channel_name" == "nixos" ]]; then
runCmd nix-channel --update "$channel_name"
elif [ -e "$channelpath/.update-on-nixos-rebuild" ]; then
runCmd nix-channel --update "$channel_name"
elif [[ -n $upgrade_all ]] ; then
runCmd nix-channel --update "$channel_name"
fi
done
fi
# Make sure that we use the Nix package we depend on, not something
# else from the PATH for nix-{env,instantiate,build}. This is
# important, because NixOS defaults the architecture of the rebuilt
# system to the architecture of the nix-* binaries used. So if on an
# amd64 system the user has an i686 Nix package in her PATH, then we
# would silently downgrade the whole system to be i686 NixOS on the
# next reboot.
if [ -z "$_NIXOS_REBUILD_REEXEC" ]; then
export PATH=@nix@/bin:$PATH
fi
# Use /etc/nixos/flake.nix if it exists. It can be a symlink to the
# actual flake.
if [[ -z $flake && -e /etc/nixos/flake.nix && -z $noFlake ]]; then
flake="$(dirname "$(readlink -f /etc/nixos/flake.nix)")"
fi
# For convenience, use the hostname as the default configuration to
# build from the flake.
if [[ -n $flake ]]; then
if [[ $flake =~ ^(.*)\#([^\#\"]*)$ ]]; then
flake="${BASH_REMATCH[1]}"
flakeAttr="${BASH_REMATCH[2]}"
fi
if [[ -z $flakeAttr ]]; then
hostname="$(targetHostCmd cat /proc/sys/kernel/hostname)"
if [[ -z $hostname ]]; then
hostname=default
fi
flakeAttr="nixosConfigurations.\"$hostname\""
else
flakeAttr="nixosConfigurations.\"$flakeAttr\""
fi
fi
if [[ ! -z "$specialisation" && ! "$action" = switch && ! "$action" = test ]]; then
log "error: ‘--specialisation’ can only be used with ‘switch’ and ‘test’"
exit 1
fi
tmpDir=$(mktemp -t -d nixos-rebuild.XXXXXX)
cleanup() {
for ctrl in "$tmpDir"/ssh-*; do
ssh -o ControlPath="$ctrl" -O exit dummyhost 2>/dev/null || true
done
rm -rf "$tmpDir"
}
trap cleanup EXIT
# Re-execute nixos-rebuild from the Nixpkgs tree.
if [[ -z $_NIXOS_REBUILD_REEXEC && -n $canRun && -z $fast ]]; then
if [[ -z $flake ]]; then
if p=$(runCmd nix-build --no-out-link --expr 'with import <nixpkgs/nixos> {}; config.system.build.nixos-rebuild' "${extraBuildFlags[@]}"); then
SHOULD_REEXEC=1
fi
else
runCmd nix "${flakeFlags[@]}" build --out-link "${tmpDir}/nixos-rebuild" "$flake#$flakeAttr.config.system.build.nixos-rebuild" "${extraBuildFlags[@]}" "${lockFlags[@]}"
if p=$(readlink -e "${tmpDir}/nixos-rebuild"); then
SHOULD_REEXEC=1
fi
fi
if [[ -n $SHOULD_REEXEC ]]; then
export _NIXOS_REBUILD_REEXEC=1
# Manually call cleanup as the EXIT trap is not triggered when using exec
cleanup
runCmd exec "$p/bin/nixos-rebuild" "${origArgs[@]}"
exit 1
fi
fi
# Find configuration.nix and open editor instead of building.
if [ "$action" = edit ]; then
if [[ -z $flake ]]; then
NIXOS_CONFIG=${NIXOS_CONFIG:-$(runCmd nix-instantiate --find-file nixos-config)}
if [[ -d $NIXOS_CONFIG ]]; then
NIXOS_CONFIG=$NIXOS_CONFIG/default.nix
fi
runCmd exec ${EDITOR:-nano} "$NIXOS_CONFIG"
else
runCmd exec nix "${flakeFlags[@]}" edit "${lockFlags[@]}" -- "$flake#$flakeAttr"
fi
exit 1
fi
SSHOPTS="$NIX_SSHOPTS -o ControlMaster=auto -o ControlPath=$tmpDir/ssh-%n -o ControlPersist=60"
# First build Nix, since NixOS may require a newer version than the
# current one.
if [[ -n "$rollback" || "$action" = dry-build ]]; then
buildNix=
fi
nixSystem() {
machine="$(uname -m)"
if [[ "$machine" =~ i.86 ]]; then
machine=i686
fi
echo $machine-linux
}
prebuiltNix() {
machine="$1"
if [ "$machine" = x86_64 ]; then
echo @nix_x86_64_linux@
elif [[ "$machine" =~ i.86 ]]; then
echo @nix_i686_linux@
elif [[ "$machine" = aarch64 ]]; then
echo @nix_aarch64_linux@
else
log "$0: unsupported platform"
exit 1
fi
}
if [[ -n $buildNix && -z $flake ]]; then
log "building Nix..."
nixDrv=
if ! nixDrv="$(runCmd nix-instantiate '<nixpkgs/nixos>' --add-root "$tmpDir/nix.drv" --indirect -A config.nix.package.out "${extraBuildFlags[@]}")"; then
if ! nixDrv="$(runCmd nix-instantiate '<nixpkgs>' --add-root "$tmpDir/nix.drv" --indirect -A nix "${extraBuildFlags[@]}")"; then
if ! nixStorePath="$(runCmd nix-instantiate --eval '<nixpkgs/nixos/modules/installer/tools/nix-fallback-paths.nix>' -A "$(nixSystem)" | sed -e 's/^"//' -e 's/"$//')"; then
nixStorePath="$(prebuiltNix "$(uname -m)")"
fi
if ! runCmd nix-store -r "$nixStorePath" --add-root "${tmpDir}/nix" --indirect \
--option extra-binary-caches https://cache.nixos.org/; then
log "warning: don't know how to get latest Nix"
fi
# Older version of nix-store -r don't support --add-root.
[ -e "$tmpDir/nix" ] || ln -sf "$nixStorePath" "$tmpDir/nix"
if [ -n "$buildHost" ]; then
remoteNixStorePath="$(runCmd prebuiltNix "$(buildHostCmd uname -m)")"
remoteNix="$remoteNixStorePath/bin"
if ! buildHostCmd nix-store -r "$remoteNixStorePath" \
--option extra-binary-caches https://cache.nixos.org/ >/dev/null; then
remoteNix=
log "warning: don't know how to get latest Nix"
fi
fi
fi
fi
if [ -a "$nixDrv" ]; then
nix-store -r "$nixDrv"'!'"out" --add-root "$tmpDir/nix" --indirect >/dev/null
if [ -n "$buildHost" ]; then
nix-copy-closure "${copyFlags[@]}" --to "$buildHost" "$nixDrv"
# The nix build produces multiple outputs, we add them all to the remote path
for p in $(buildHostCmd nix-store -r "$(readlink "$nixDrv")" "${buildArgs[@]}"); do
remoteNix="$remoteNix${remoteNix:+:}$p/bin"
done
fi
fi
PATH="$tmpDir/nix/bin:$PATH"
fi
# Update the version suffix if we're building from Git (so that
# nixos-version shows something useful).
if [[ -n $canRun && -z $flake ]]; then
if nixpkgs=$(runCmd nix-instantiate --find-file nixpkgs "${extraBuildFlags[@]}"); then
suffix=$(runCmd $SHELL "$nixpkgs/nixos/modules/installer/tools/get-version-suffix" "${extraBuildFlags[@]}" || true)
if [ -n "$suffix" ]; then
echo -n "$suffix" > "$nixpkgs/.version-suffix" || true
fi
fi
fi
if [ "$action" = dry-build ]; then
extraBuildFlags+=(--dry-run)
fi
if [ "$action" = repl ]; then
# This is a very end user command, implemented using sub-optimal means.
# You should feel free to improve its behavior, as well as resolve tech
# debt in "breaking" ways. Humans adapt quite well.
if [[ -z $flake ]]; then
exec nix repl '<nixpkgs/nixos>' "${extraBuildFlags[@]}"
else
if [[ -n "${lockFlags[0]}" ]]; then
# nix repl itself does not support locking flags
log "nixos-rebuild repl does not support locking flags yet"
exit 1
fi
d='$'
q='"'
bold="$(echo -e '\033[1m')"
blue="$(echo -e '\033[34;1m')"
attention="$(echo -e '\033[35;1m')"
reset="$(echo -e '\033[0m')"
# This nix repl invocation is impure, because usually the flakeref is.
# For a solution that preserves the motd and custom scope, we need
# something like https://github.com/NixOS/nix/issues/8679.
exec nix repl --impure --expr "
let flake = builtins.getFlake ''$flake'';
configuration = flake.$flakeAttr;
motd = ''
$d{$q\n$q}
Hello and welcome to the NixOS configuration
$flakeAttr
in $flake
The following is loaded into nix repl's scope:
- ${blue}config${reset} All option values
- ${blue}options${reset} Option data and metadata
- ${blue}pkgs${reset} Nixpkgs package set
- ${blue}lib${reset} Nixpkgs library functions
- other module arguments
- ${blue}flake${reset} Flake outputs, inputs and source info of $flake
Use tab completion to browse around ${blue}config${reset}.
Use ${bold}:r${reset} to ${bold}reload${reset} everything after making a change in the flake.
(assuming $flake is a mutable flake ref)
See ${bold}:?${reset} for more repl commands.
${attention}warning:${reset} nixos-rebuild repl does not currently enforce pure evaluation.
'';
scope =
assert configuration._type or null == ''configuration'';
assert configuration.class or ''nixos'' == ''nixos'';
configuration._module.args //
configuration._module.specialArgs //
{
inherit (configuration) config options;
lib = configuration.lib or configuration.pkgs.lib;
inherit flake;
};
in builtins.seq scope builtins.trace motd scope
" "${extraBuildFlags[@]}"
fi
fi
if [ "$action" = list-generations ]; then
if [ ! -L "$profile" ]; then
log "No profile \`$(basename "$profile")' found"
exit 1
fi
generation_from_dir() {
generation_dir="$1"
generation_base="$(basename "$generation_dir")" # Has the format "system-123-link" for generation 123
no_link_gen="${generation_base%-link}" # remove the "-link"
echo "${no_link_gen##*-}" # remove everything before the last dash
}
describe_generation(){
generation_dir="$1"
generation_number="$(generation_from_dir "$generation_dir")"
nixos_version="$(cat "$generation_dir/nixos-version" 2> /dev/null || echo "Unknown")"
kernel_dir="$(dirname "$(realpath "$generation_dir/kernel")")"
kernel_version="$(ls "$kernel_dir/lib/modules" || echo "Unknown")"
configurationRevision="$("$generation_dir/sw/bin/nixos-version" --configuration-revision 2> /dev/null || true)"
# Old nixos-version output ignored unknown flags and just printed the version
# therefore the following workaround is done not to show the default output
nixos_version_default="$("$generation_dir/sw/bin/nixos-version")"
if [ "$configurationRevision" == "$nixos_version_default" ]; then
configurationRevision=""
fi
# jq automatically quotes the output => don't try to quote it in output!
build_date="$(stat "$generation_dir" --format=%W | jq 'todate')"
pushd "$generation_dir/specialisation/" > /dev/null || :
specialisation_list=(*)
popd > /dev/null || :
specialisations="$(jq --compact-output --null-input '$ARGS.positional' --args -- "${specialisation_list[@]}")"
if [ "$(basename "$generation_dir")" = "$(readlink "$profile")" ]; then
current_generation_tag="true"
else
current_generation_tag="false"
fi
# Escape userdefined strings
nixos_version="$(jq -aR <<< "$nixos_version")"
kernel_version="$(jq -aR <<< "$kernel_version")"
configurationRevision="$(jq -aR <<< "$configurationRevision")"
cat << EOF
{
"generation": $generation_number,
"date": $build_date,
"nixosVersion": $nixos_version,
"kernelVersion": $kernel_version,
"configurationRevision": $configurationRevision,
"specialisations": $specialisations,
"current": $current_generation_tag
}
EOF
}
find "$(dirname "$profile")" -regex "$profile-[0-9]+-link" |
sort -Vr |
while read -r generation_dir; do
describe_generation "$generation_dir"
done |
if [ -z "$json" ]; then
jq --slurp -r '.[] | [
([.generation, (if .current == true then "current" else "" end)] | join(" ")),
(.date | fromdate | strflocaltime("%Y-%m-%d %H:%M:%S")),
.nixosVersion, .kernelVersion, .configurationRevision,
(.specialisations | join(" "))
] | @tsv' |
column --separator $'\t' --table --table-columns "Generation,Build-date,NixOS version,Kernel,Configuration Revision,Specialisation" |
${PAGER:cat}
else
jq --slurp .
fi
exit 0
fi
# Either upgrade the configuration in the system profile (for "switch"
# or "boot"), or just build it and create a symlink "result" in the
# current directory (for "build" and "test").
if [ -z "$rollback" ]; then
log "building the system configuration..."
if [[ "$action" = switch || "$action" = boot ]]; then
if [[ -z $flake ]]; then
pathToConfig="$(nixBuild '<nixpkgs/nixos>' --no-out-link -A system "${extraBuildFlags[@]}")"
else
pathToConfig="$(nixFlakeBuild "$flake#$flakeAttr.config.system.build.toplevel" "${extraBuildFlags[@]}" "${lockFlags[@]}")"
fi
copyToTarget "$pathToConfig"
targetHostSudoCmd nix-env -p "$profile" --set "$pathToConfig"
elif [[ "$action" = test || "$action" = build || "$action" = dry-build || "$action" = dry-activate ]]; then
if [[ -z $flake ]]; then
pathToConfig="$(nixBuild '<nixpkgs/nixos>' -A system -k "${extraBuildFlags[@]}")"
else
pathToConfig="$(nixFlakeBuild "$flake#$flakeAttr.config.system.build.toplevel" "${extraBuildFlags[@]}" "${lockFlags[@]}")"
fi
elif [ "$action" = build-vm ]; then
if [[ -z $flake ]]; then
pathToConfig="$(nixBuild '<nixpkgs/nixos>' -A vm -k "${extraBuildFlags[@]}")"
else
pathToConfig="$(nixFlakeBuild "$flake#$flakeAttr.config.system.build.vm" "${extraBuildFlags[@]}" "${lockFlags[@]}")"
fi
elif [ "$action" = build-vm-with-bootloader ]; then
if [[ -z $flake ]]; then
pathToConfig="$(nixBuild '<nixpkgs/nixos>' -A vmWithBootLoader -k "${extraBuildFlags[@]}")"
else
pathToConfig="$(nixFlakeBuild "$flake#$flakeAttr.config.system.build.vmWithBootLoader" "${extraBuildFlags[@]}" "${lockFlags[@]}")"
fi
else
showSyntax
fi
# Copy build to target host if we haven't already done it
if ! [[ "$action" = switch || "$action" = boot ]]; then
copyToTarget "$pathToConfig"
fi
else # [ -n "$rollback" ]
if [[ "$action" = switch || "$action" = boot ]]; then
targetHostSudoCmd nix-env --rollback -p "$profile"
pathToConfig="$profile"
elif [[ "$action" = test || "$action" = build ]]; then
systemNumber=$(
targetHostCmd nix-env -p "$profile" --list-generations |
sed -n '/current/ {g; p;}; s/ *\([0-9]*\).*/\1/; h'
)
pathToConfig="$profile"-${systemNumber}-link
if [ -z "$targetHost" ]; then
ln -sT "$pathToConfig" ./result
fi
else
showSyntax
fi
fi
# If we're not just building, then make the new configuration the boot
# default and/or activate it now.
if [[ "$action" = switch || "$action" = boot || "$action" = test || "$action" = dry-activate ]]; then
# Using systemd-run here to protect against PTY failures/network
# disconnections during rebuild.
# See: https://github.com/NixOS/nixpkgs/issues/39118
cmd=(
"systemd-run"
"-E" "LOCALE_ARCHIVE" # Will be set to new value early in switch-to-configuration script, but interpreter starts out with old value
"-E" "NIXOS_INSTALL_BOOTLOADER"
"--collect"
"--no-ask-password"
"--pty"
"--quiet"
"--same-dir"
"--service-type=exec"
"--unit=nixos-rebuild-switch-to-configuration"
"--wait"
)
# Check if we have a working systemd-run. In chroot environments we may have
# a non-working systemd, so we fallback to not using systemd-run.
# You may also want to explicitly set NIXOS_SWITCH_USE_DIRTY_ENV environment
# variable, since systemd-run runs inside an isolated environment and
# this may break some post-switch scripts. However keep in mind that this
# may be dangerous in remote access (e.g. SSH).
if [[ -n "$NIXOS_SWITCH_USE_DIRTY_ENV" ]]; then
log "warning: skipping systemd-run since NIXOS_SWITCH_USE_DIRTY_ENV is set. This environment variable will be ignored in the future"
cmd=()
elif ! targetHostSudoCmd "${cmd[@]}" true; then
logVerbose "Skipping systemd-run to switch configuration since it is not working in target host."
cmd=(
"env"
"-i"
"LOCALE_ARCHIVE=$LOCALE_ARCHIVE"
"NIXOS_INSTALL_BOOTLOADER=$NIXOS_INSTALL_BOOTLOADER"
)
else
logVerbose "Using systemd-run to switch configuration."
fi
if [[ -z "$specialisation" ]]; then
cmd+=("$pathToConfig/bin/switch-to-configuration")
else
cmd+=("$pathToConfig/specialisation/$specialisation/bin/switch-to-configuration")
if [[ ! -f "${cmd[-1]}" ]]; then
log "error: specialisation not found: $specialisation"
exit 1
fi
fi
if ! targetHostSudoCmd "${cmd[@]}" "$action"; then
log "warning: error(s) occurred while switching to the new configuration"
exit 1
fi
fi
if [[ "$action" = build-vm || "$action" = build-vm-with-bootloader ]]; then
cat >&2 <<EOF
Done. The virtual machine can be started by running $(echo "${pathToConfig}/bin/"run-*-vm)
EOF
fi
|