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nixos-install: re-enable --chroot option

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I forgot to implement it the first time around. Whoops!
This commit is contained in:
Dan Peebles 2017-08-30 21:57:05 -04:00
parent fb18203450
commit 186c120bed
1 changed files with 28 additions and 5 deletions
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33
nixos/modules/installer/tools/nixos-install.sh
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@ -102,7 +102,7 @@ fi
extraBuildFlags+=(--option "build-users-group" "$buildUsersGroup")
# Inherit binary caches from the host
# TODO: will this still work with Nix 1.12 now that it has no perl? Probably not...
# TODO: will this still work with Nix 1.12 now that it has no perl? Probably not...
binary_caches="$(@perl@/bin/perl -I @nix@/lib/perl5/site_perl/*/* -e 'use Nix::Config; Nix::Config::readConfig; print $Nix::Config::config{"binary-caches"};')"
extraBuildFlags+=(--option "binary-caches" "$binary_caches")
@ -110,8 +110,33 @@ nixpkgs="$(readlink -f "$(nix-instantiate --find-file nixpkgs)")"
export NIX_PATH="nixpkgs=$nixpkgs:nixos-config=$mountPoint/$NIXOS_CONFIG"
unset NIXOS_CONFIG
# TODO: do I need to set NIX_SUBSTITUTERS here or is the --option binary-caches above enough?
# These get created in nixos-prepare-root as well, but we want to make sure they're here in case we're
# running with --chroot. TODO: --chroot should just be split into a separate tool.
mkdir -m 0755 -p "$mountPoint/dev" "$mountPoint/proc" "$mountPoint/sys"
# Set up some bind mounts we'll want regardless of chroot or not
mount --rbind /dev "$mountPoint/dev"
mount --rbind /proc "$mountPoint/proc"
mount --rbind /sys "$mountPoint/sys"
# If we asked for a chroot, that means we're not actually installing anything (yeah I was confused too)
# and we just want to run a command in the context of a $mountPoint that we're assuming has already been
# set up by a previous nixos-install invocation. In that case we set up some remaining bind mounts and
# exec the requested command, skipping the rest of the installation procedure.
if [ -n "$runChroot" ]; then
mount -t tmpfs -o "mode=0755" none $mountPoint/run
rm -rf $mountPoint/var/run
ln -s /run $mountPoint/var/run
for f in /etc/resolv.conf /etc/hosts; do rm -f $mountPoint/$f; [ -f "$f" ] && cp -Lf $f $mountPoint/etc/; done
for f in /etc/passwd /etc/group; do touch $mountPoint/$f; [ -f "$f" ] && mount --rbind -o ro $f $mountPoint/$f; done
if ! [ -L $mountPoint/nix/var/nix/profiles/system ]; then
echo "$0: installation not finished; cannot chroot into installation directory"
exit 1
fi
ln -s /nix/var/nix/profiles/system $mountPoint/run/current-system
exec chroot $mountPoint "${chrootCommand[@]}"
fi
# A place to drop temporary closures
trap "rm -rf $tmpdir" EXIT
@ -145,9 +170,7 @@ nix-store --export $channel_root > $channel_closure
# nixos-prepare-root doesn't currently do anything with file ownership, so we set it up here instead
chown @root_uid@:@nixbld_gid@ $mountPoint/nix/store
mount --rbind /dev $mountPoint/dev
mount --rbind /proc $mountPoint/proc
mount --rbind /sys $mountPoint/sys
# Grub needs an mtab.
ln -sfn /proc/mounts $mountPoint/etc/mtab