blob: 79ed18c923c09361b17f12b19b26b0cbdb269efd (
plain) (
blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
|
#! @shell@
# - make Nix store etc.
# - copy closure of Nix to target device
# - register validity
# - with a chroot to the target device:
# * nix-env -p /nix/var/nix/profiles/system -i <nix-expr for the configuration>
# * install the boot loader
# Ensure a consistent umask.
umask 0022
# Re-exec ourselves in a private mount namespace so that our bind
# mounts get cleaned up automatically.
if [ "$(id -u)" = 0 ]; then
if [ -z "$NIXOS_INSTALL_REEXEC" ]; then
export NIXOS_INSTALL_REEXEC=1
exec unshare --mount --uts -- "$0" "$@"
else
mount --make-rprivate /
fi
fi
# Parse the command line for the -I flag
extraBuildFlags=()
chrootCommand=(/run/current-system/sw/bin/bash)
buildUsersGroup="nixbld"
while [ "$#" -gt 0 ]; do
i="$1"; shift 1
case "$i" in
--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")
;;
--root)
mountPoint="$1"; shift 1
;;
--closure)
closure="$1"; shift 1
buildUsersGroup=""
;;
--no-channel-copy)
noChannelCopy=1
;;
--no-root-passwd)
noRootPasswd=1
;;
--no-bootloader)
noBootLoader=1
;;
--show-trace)
extraBuildFlags+=("$i")
;;
--chroot)
runChroot=1
if [[ "$@" != "" ]]; then
chrootCommand=("$@")
fi
break
;;
--help)
exec man nixos-install
exit 1
;;
*)
echo "$0: unknown option \`$i'"
exit 1
;;
esac
done
set -e
shopt -s nullglob
if test -z "$mountPoint"; then
mountPoint=/mnt
fi
if ! test -e "$mountPoint"; then
echo "mount point $mountPoint doesn't exist"
exit 1
fi
# Get the path of the NixOS configuration file.
if test -z "$NIXOS_CONFIG"; then
NIXOS_CONFIG=/etc/nixos/configuration.nix
fi
if [ ! -e "$mountPoint/$NIXOS_CONFIG" ] && [ -z "$closure" ]; then
echo "configuration file $mountPoint/$NIXOS_CONFIG doesn't exist"
exit 1
fi
# Builds will use users that are members of this group
extraBuildFlags+=(--option "build-users-group" "$buildUsersGroup")
# Inherit binary caches from the host
# TODO: will this still work with Nix 1.12 now that it has no perl? Probably not...
binary_caches="$(@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")
# We only need nixpkgs in the path if we don't already have a system closure to install
if [[ -z "$closure" ]]; then
nixpkgs="$(readlink -f "$(nix-instantiate --find-file nixpkgs)")"
export NIX_PATH="nixpkgs=$nixpkgs:nixos-config=$mountPoint/$NIXOS_CONFIG"
fi
unset NIXOS_CONFIG
# TODO: do I need to set NIX_SUBSTITUTERS here or is the --option binary-caches above enough?
# A place to drop temporary closures
trap "rm -rf $tmpdir" EXIT
tmpdir="$(mktemp -d)"
# Build a closure (on the host; we then copy it into the guest)
function closure() {
nix-build "${extraBuildFlags[@]}" --no-out-link -E "with import <nixpkgs> {}; runCommand \"closure\" { exportReferencesGraph = [ \"x\" (buildEnv { name = \"env\"; paths = [ ($1) stdenv ]; }) ]; } \"cp x \$out\""
}
system_closure="$tmpdir/system.closure"
# Use a FIFO for piping nix-store --export into nix-store --import, saving disk
# I/O and space. nix-store --import is run by nixos-prepare-root.
mkfifo $system_closure
if [ -z "$closure" ]; then
expr="(import <nixpkgs/nixos> {}).system"
system_root="$(nix-build -E "$expr")"
system_closure="$(closure "$expr")"
else
system_root=$closure
# Create a temporary file ending in .closure (so nixos-prepare-root knows to --import it) to transport the store closure
# to the filesytem we're preparing. Also delete it on exit!
# Run in background to avoid blocking while trying to write to the FIFO
# $system_closure refers to
nix-store --export $(nix-store -qR $closure) > $system_closure &
fi
channel_root="$(nix-env -p /nix/var/nix/profiles/per-user/root/channels -q nixos --no-name --out-path 2>/dev/null || echo -n "")"
channel_closure="$tmpdir/channel.closure"
nix-store --export $channel_root > $channel_closure
# Populate the target root directory with the basics
@prepare_root@/bin/nixos-prepare-root "$mountPoint" "$channel_root" "$system_root" @nixClosure@ "$system_closure" "$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 $mountPoint/etc/mtab
# Switch to the new system configuration. This will install Grub with
# a menu default pointing at the kernel/initrd/etc of the new
# configuration.
echo "finalising the installation..."
if [ -z "$noBootLoader" ]; then
NIXOS_INSTALL_BOOTLOADER=1 chroot $mountPoint \
/nix/var/nix/profiles/system/bin/switch-to-configuration boot
fi
# Run the activation script.
chroot $mountPoint /nix/var/nix/profiles/system/activate
# Ask the user to set a root password.
if [ -z "$noRootPasswd" ] && chroot $mountPoint [ -x /run/wrappers/bin/passwd ] && [ -t 0 ]; then
echo "setting root password..."
chroot $mountPoint /run/wrappers/bin/passwd
fi
echo "installation finished!"
|