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Revert "Revert "nixos-rebuild: Add option for building and/or deploying on a remote host""

This reverts commit 78be7f5a53.
This commit is contained in:
Rickard Nilsson 2016-01-11 19:41:48 +01:00
parent 23f5e3c90f
commit fb2eae08d5

View file

@ -19,6 +19,8 @@ rollback=
upgrade=
repair=
profile=/nix/var/nix/profiles/system
buildHost=
targetHost=
while [ "$#" -gt 0 ]; do
i="$1"; shift 1
@ -73,6 +75,14 @@ while [ "$#" -gt 0 ]; do
fi
shift 1
;;
--build-host|h)
buildHost="$1"
shift 1
;;
--target-host|t)
targetHost="$1"
shift 1
;;
*)
echo "$0: unknown option \`$i'"
exit 1
@ -80,6 +90,90 @@ while [ "$#" -gt 0 ]; do
esac
done
if [ -z "$buildHost" -a -n "$targetHost" ]; then
buildHost="$targetHost"
fi
if [ "$targetHost" = localhost ]; then
targetHost=
fi
if [ "$buildHost" = localhost ]; then
buildHost=
fi
buildHostCmd() {
if [ -z "$buildHost" ]; then
"$@"
elif [ -n "$remoteNix" ]; then
ssh $SSHOPTS "$buildHost" PATH="$remoteNix:$PATH" "$@"
else
ssh $SSHOPTS "$buildHost" "$@"
fi
}
targetHostCmd() {
if [ -z "$targetHost" ]; then
"$@"
else
ssh $SSHOPTS "$targetHost" "$@"
fi
}
copyToTarget() {
if ! [ "$targetHost" = "$buildHost" ]; then
if [ -z "$targetHost" ]; then
NIX_SSHOPTS=$SSH_OPTS nix-copy-closure --from "$buildHost" "$1"
elif [ -z "$buildHost" ]; then
NIX_SSHOPTS=$SSH_OPTS nix-copy-closure --to "$targetHost" "$1"
else
buildHostCmd nix-copy-closure --to "$targetHost" "$1"
fi
fi
}
nixBuild() {
if [ -z "$buildHost" ]; then
nix-build "$@"
else
local instArgs=()
local buildArgs=()
while [ "$#" -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" "$j")
;;
-I)
# We don't want this in buildArgs
shift 1
;;
"<"*) # nix paths
instArgs+=("$i")
;;
*)
buildArgs+=("$i")
;;
esac
done
local drv="$(nix-instantiate "${instArgs[@]}" "${extraBuildFlags[@]}")"
if [ -a "$drv" ]; then
NIX_SSHOPTS=$SSH_OPTS nix-copy-closure --to "$buildHost" "$drv"
buildHostCmd nix-store -r "$drv" "${buildArgs[@]}"
else
echo "nix-instantiate failed"
exit 1
fi
fi
}
if [ -z "$action" ]; then showSyntax; fi
# Only run shell scripts from the Nixpkgs tree if the action is
@ -128,7 +222,16 @@ fi
tmpDir=$(mktemp -t -d nixos-rebuild.XXXXXX)
trap 'rm -rf "$tmpDir"' EXIT
SSHOPTS="$NIX_SSHOPTS -o ControlMaster=auto -o ControlPath=$tmpDir/ssh-%n -o ControlPersist=60"
cleanup() {
for ctrl in "$tmpDir"/ssh-*; do
ssh -o ControlPath="$ctrl" -O exit dummyhost 2>/dev/null || true
done
rm -rf "$tmpDir"
}
trap cleanup EXIT
# If the Nix daemon is running, then use it. This allows us to use
@ -150,30 +253,56 @@ if [ -n "$rollback" -o "$action" = dry-build ]; then
buildNix=
fi
prebuiltNix() {
machine="$1"
if [ "$machine" = x86_64 ]; then
return /nix/store/xryr9g56h8yjddp89d6dw12anyb4ch7c-nix-1.10
elif [[ "$machine" =~ i.86 ]]; then
return /nix/store/2w92k5wlpspf0q2k9mnf2z42prx3bwmv-nix-1.10
else
echo "$0: unsupported platform"
exit 1
fi
}
remotePATH=
if [ -n "$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
if ! nix-build '<nixpkgs>' -A nix -o $tmpDir/nix "${extraBuildFlags[@]}" > /dev/null; then
machine="$(uname -m)"
if [ "$machine" = x86_64 ]; then
nixStorePath=/nix/store/xryr9g56h8yjddp89d6dw12anyb4ch7c-nix-1.10
elif [[ "$machine" =~ i.86 ]]; then
nixStorePath=/nix/store/2w92k5wlpspf0q2k9mnf2z42prx3bwmv-nix-1.10
else
echo "$0: unsupported platform"
exit 1
fi
nixDrv=
if ! nixDrv="$(nix-instantiate '<nixpkgs/nixos>' --add-root $tmpDir/nixdrv --indirect -A config.nix.package "${extraBuildFlags[@]}")"; then
if ! nixDrv="$(nix-instantiate '<nixpkgs/nixos>' --add-root $tmpDir/nixdrv --indirect -A nixFallback "${extraBuildFlags[@]}")"; then
if ! nixDrv="$(nix-instantiate '<nixpkgs>' --add-root $tmpDir/nixdrv --indirect -A nix "${extraBuildFlags[@]}")"; then
nixStorePath="$(prebuiltNix "$(uname -m)")"
if ! nix-store -r $nixStorePath --add-root $tmpDir/nix --indirect \
--option extra-binary-caches https://cache.nixos.org/; then
echo "warning: don't know how to get latest Nix" >&2
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="$(prebuiltNix "$(buildHostCmd uname -m)")"
remoteNix="$remoteNixStorePath/bin"
if ! buildHostCmd nix-store -r $remoteNixStorePath \
--option extra-binary-caches https://cache.nixos.org/ >/dev/null; then
remoteNix=
echo "warning: don't know how to get latest Nix" >&2
fi
fi
fi
fi
fi
PATH=$tmpDir/nix/bin:$PATH
if [ -a "$nixDrv" ]; then
nix-store -r "$nixDrv" --add-root $tmpDir/nix --indirect >/dev/null
if [ -n "$buildHost" ]; then
nix-copy-closure --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:$PATH"
fi
@ -200,31 +329,35 @@ fi
if [ -z "$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="$profile"
pathToConfig="$(nixBuild '<nixpkgs/nixos>' -A system "${extraBuildFlags[@]}")"
copyToTarget "$pathToConfig"
targetHostCmd nix-env -p "$profile" --set "$pathToConfig"
elif [ "$action" = test -o "$action" = build -o "$action" = dry-build -o "$action" = dry-activate ]; then
nix-build '<nixpkgs/nixos>' -A system -k "${extraBuildFlags[@]}" > /dev/null
pathToConfig=./result
pathToConfig="$(nixBuild '<nixpkgs/nixos>' -A system -k "${extraBuildFlags[@]}")"
elif [ "$action" = build-vm ]; then
nix-build '<nixpkgs/nixos>' -A vm -k "${extraBuildFlags[@]}" > /dev/null
pathToConfig=./result
pathToConfig="$(nixBuild '<nixpkgs/nixos>' -A vm -k "${extraBuildFlags[@]}")"
elif [ "$action" = build-vm-with-bootloader ]; then
nix-build '<nixpkgs/nixos>' -A vmWithBootLoader -k "${extraBuildFlags[@]}" > /dev/null
pathToConfig=./result
pathToConfig="$(nixBuild '<nixpkgs/nixos>' -A vmWithBootLoader -k "${extraBuildFlags[@]}")"
else
showSyntax
fi
# Copy build to target host if we haven't already done it
if ! [ "$action" = switch -o "$action" = boot ]; then
copyToTarget "$pathToConfig"
fi
else # [ -n "$rollback" ]
if [ "$action" = switch -o "$action" = boot ]; then
nix-env --rollback -p "$profile"
targetHostCmd nix-env --rollback -p "$profile"
pathToConfig="$profile"
elif [ "$action" = test -o "$action" = build ]; then
systemNumber=$(
nix-env -p "$profile" --list-generations |
targetHostCmd nix-env -p "$profile" --list-generations |
sed -n '/current/ {g; p;}; s/ *\([0-9]*\).*/\1/; h'
)
ln -sT "$profile"-${systemNumber}-link ./result
pathToConfig=./result
pathToConfig="$profile"-${systemNumber}-link
if [ -z "$targetHost" ]; then
ln -sT "$pathToConfig" ./result
fi
else
showSyntax
fi
@ -234,7 +367,7 @@ 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 "$action" = test -o "$action" = dry-activate ]; then
if ! $pathToConfig/bin/switch-to-configuration "$action"; then
if ! targetHostCmd $pathToConfig/bin/switch-to-configuration "$action"; then
echo "warning: error(s) occurred while switching to the new configuration" >&2
exit 1
fi