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lix/scripts/install-multi-user.sh
Travis A. Everett f7859eef49 installer: improve existing rc backup nag
2021-11-09 08:14:51 -06:00

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#!/usr/bin/env bash
set -eu
set -o pipefail
# Sourced from:
# - https://github.com/LnL7/nix-darwin/blob/8c29d0985d74b4a990238497c47a2542a5616b3c/bootstrap.sh
# - https://gist.github.com/expipiplus1/e571ce88c608a1e83547c918591b149f/ac504c6c1b96e65505fbda437a28ce563408ecb0
# - https://github.com/NixOS/nixos-org-configurations/blob/a122f418797713d519aadf02e677fce0dc1cb446/delft/scripts/nix-mac-installer.sh
# - https://github.com/matthewbauer/macNixOS/blob/f6045394f9153edea417be90c216788e754feaba/install-macNixOS.sh
# - https://gist.github.com/LnL7/9717bd6cdcb30b086fd7f2093e5f8494/86b26f852ce563e973acd30f796a9a416248c34a
#
# however tracking which bits came from which would be impossible.
readonly ESC='\033[0m'
readonly BOLD='\033[1m'
readonly BLUE='\033[34m'
readonly BLUE_UL='\033[4;34m'
readonly GREEN='\033[32m'
readonly GREEN_UL='\033[4;32m'
readonly RED='\033[31m'
# installer allows overriding build user count to speed up installation
# as creating each user takes non-trivial amount of time on macos
readonly NIX_USER_COUNT=${NIX_USER_COUNT:-32}
readonly NIX_BUILD_GROUP_ID="30000"
readonly NIX_BUILD_GROUP_NAME="nixbld"
# darwin installer needs to override these
NIX_FIRST_BUILD_UID="30001"
NIX_BUILD_USER_NAME_TEMPLATE="nixbld%d"
# Please don't change this. We don't support it, because the
# default shell profile that comes with Nix doesn't support it.
readonly NIX_ROOT="/nix"
readonly NIX_EXTRA_CONF=${NIX_EXTRA_CONF:-}
readonly PROFILE_TARGETS=("/etc/bashrc" "/etc/profile.d/nix.sh" "/etc/zshrc" "/etc/bash.bashrc" "/etc/zsh/zshrc")
readonly PROFILE_BACKUP_SUFFIX=".backup-before-nix"
readonly PROFILE_NIX_FILE="$NIX_ROOT/var/nix/profiles/default/etc/profile.d/nix-daemon.sh"
readonly NIX_INSTALLED_NIX="@nix@"
readonly NIX_INSTALLED_CACERT="@cacert@"
#readonly NIX_INSTALLED_NIX="/nix/store/j8dbv5w6jl34caywh2ygdy88knx1mdf7-nix-2.3.6"
#readonly NIX_INSTALLED_CACERT="/nix/store/7dxhzymvy330i28ii676fl1pqwcahv2f-nss-cacert-3.49.2"
readonly EXTRACTED_NIX_PATH="$(dirname "$0")"
readonly ROOT_HOME=~root
if [ -t 0 ]; then
readonly IS_HEADLESS='no'
else
readonly IS_HEADLESS='yes'
fi
headless() {
if [ "$IS_HEADLESS" = "yes" ]; then
return 0
else
return 1
fi
}
contact_us() {
echo "You can open an issue at https://github.com/nixos/nix/issues"
echo ""
echo "Or feel free to contact the team:"
echo " - Matrix: #nix:nixos.org"
echo " - IRC: in #nixos on irc.libera.chat"
echo " - twitter: @nixos_org"
echo " - forum: https://discourse.nixos.org"
}
get_help() {
echo "We'd love to help if you need it."
echo ""
contact_us
}
uninstall_directions() {
subheader "Uninstalling nix:"
local step=0
if poly_service_installed_check; then
step=$((step + 1))
poly_service_uninstall_directions "$step"
fi
for profile_target in "${PROFILE_TARGETS[@]}"; do
if [ -e "$profile_target" ] && [ -e "$profile_target$PROFILE_BACKUP_SUFFIX" ]; then
step=$((step + 1))
cat <<EOF
$step. Restore $profile_target$PROFILE_BACKUP_SUFFIX back to $profile_target
sudo mv $profile_target$PROFILE_BACKUP_SUFFIX $profile_target
(after this one, you may need to re-open any terminals that were
opened while it existed.)
EOF
fi
done
step=$((step + 1))
cat <<EOF
$step. Delete the files Nix added to your system:
sudo rm -rf /etc/nix $NIX_ROOT $ROOT_HOME/.nix-profile $ROOT_HOME/.nix-defexpr $ROOT_HOME/.nix-channels $HOME/.nix-profile $HOME/.nix-defexpr $HOME/.nix-channels
and that is it.
EOF
}
nix_user_for_core() {
printf "$NIX_BUILD_USER_NAME_TEMPLATE" "$1"
}
nix_uid_for_core() {
echo $((NIX_FIRST_BUILD_UID + $1 - 1))
}
_textout() {
echo -en "$1"
shift
if [ "$*" = "" ]; then
cat
else
echo "$@"
fi
echo -en "$ESC"
}
header() {
follow="---------------------------------------------------------"
header=$(echo "---- $* $follow$follow$follow" | head -c 80)
echo ""
_textout "$BLUE" "$header"
}
warningheader() {
follow="---------------------------------------------------------"
header=$(echo "---- $* $follow$follow$follow" | head -c 80)
echo ""
_textout "$RED" "$header"
}
subheader() {
echo ""
_textout "$BLUE_UL" "$*"
}
row() {
printf "$BOLD%s$ESC:\\t%s\\n" "$1" "$2"
}
task() {
echo ""
ok "~~> $1"
}
bold() {
echo "$BOLD$*$ESC"
}
ok() {
_textout "$GREEN" "$@"
}
warning() {
warningheader "warning!"
cat
echo ""
}
failure() {
header "oh no!"
_textout "$RED" "$@"
echo ""
_textout "$RED" "$(get_help)"
trap finish_cleanup EXIT
exit 1
}
ui_confirm() {
_textout "$GREEN$GREEN_UL" "$1"
if headless; then
echo "No TTY, assuming you would say yes :)"
return 0
fi
local prompt="[y/n] "
echo -n "$prompt"
while read -r y; do
if [ "$y" = "y" ]; then
echo ""
return 0
elif [ "$y" = "n" ]; then
echo ""
return 1
else
_textout "$RED" "Sorry, I didn't understand. I can only understand answers of y or n"
echo -n "$prompt"
fi
done
echo ""
return 1
}
printf -v _UNCHANGED_GRP_FMT "%b" $'\033[2m%='"$ESC" # "dim"
# bold+invert+red and bold+invert+green just for the +/- below
# red/green foreground for rest of the line
printf -v _OLD_LINE_FMT "%b" $'\033[1;7;31m-'"$ESC ${RED}%L${ESC}"
printf -v _NEW_LINE_FMT "%b" $'\033[1;7;32m+'"$ESC ${GREEN}%L${ESC}"
_diff() {
# simple colorized diff comatible w/ pre `--color` versions
diff --unchanged-group-format="$_UNCHANGED_GRP_FMT" --old-line-format="$_OLD_LINE_FMT" --new-line-format="$_NEW_LINE_FMT" --unchanged-line-format=" %L" "$@"
}
confirm_rm() {
local path="$1"
if ui_confirm "Can I remove $path?"; then
_sudo "to remove $path" rm "$path"
fi
}
confirm_edit() {
local path="$1"
local edit_path="$2"
cat <<EOF
Nix isn't the only thing in $path,
but I think I know how to edit it out.
Here's the diff:
EOF
# could technically test the diff, but caller should do it
_diff "$path" "$edit_path"
if ui_confirm "Does the change above look right?"; then
_sudo "remove nix from $path" cp "$edit_path" "$path"
fi
}
_SERIOUS_BUSINESS="${RED}%s:${ESC} "
password_confirm() {
local do_something_consequential="$1"
if ui_confirm "Can I $do_something_consequential?"; then
# shellcheck disable=SC2059
sudo -kv --prompt="$(printf "${_SERIOUS_BUSINESS}" "Enter your password to $do_something_consequential")"
else
return 1
fi
}
# Support accumulating reminders over the course of a run and showing
# them at the end. An example where this helps: the installer changes
# something, but it won't work without a reboot. If you tell the user
# when you do it, they may miss it in the stream. The value of the
# setting isn't enough to decide whether to message because you only
# need to message if you *changed* it.
# reminders stored in array delimited by empty entry; if ! headless,
# user is asked to confirm after each delimiter.
_reminders=()
((_remind_num=1))
remind() {
# (( arithmetic expression ))
if (( _remind_num > 1 )); then
header "Reminders"
for line in "${_reminders[@]}"; do
echo "$line"
if ! headless && [ "${#line}" = 0 ]; then
if read -r -p "Press enter/return to acknowledge."; then
printf $'\033[A\33[2K\r'
fi
fi
done
fi
}
reminder() {
printf -v label "${BLUE}[ %d ]${ESC}" "$_remind_num"
_reminders+=("$label")
if [[ "$*" = "" ]]; then
while read -r line; do
_reminders+=("$line")
done
else
# this expands each arg to an array entry (and each entry will
# ultimately be a separate line in the output)
_reminders+=("$@")
fi
_reminders+=("")
((_remind_num++))
}
__sudo() {
local expl="$1"
local cmd="$2"
shift
header "sudo execution"
echo "I am executing:"
echo ""
printf " $ sudo %s\\n" "$cmd"
echo ""
echo "$expl"
echo ""
return 0
}
_sudo() {
local expl="$1"
shift
if ! headless; then
__sudo "$expl" "$*" >&2
fi
sudo "$@"
}
readonly SCRATCH=$(mktemp -d "${TMPDIR:-/tmp/}tmp.XXXXXXXXXX")
finish_cleanup() {
rm -rf "$SCRATCH"
}
finish_fail() {
finish_cleanup
failure <<EOF
Jeeze, something went wrong. If you can take all the output and open
an issue, we'd love to fix the problem so nobody else has this issue.
:(
EOF
}
trap finish_fail EXIT
finish_success() {
ok "Alright! We're done!"
cat <<EOF
Try it! Open a new terminal, and type:
$(poly_extra_try_me_commands)
$ nix-shell -p nix-info --run "nix-info -m"
Thank you for using this installer. If you have any feedback or need
help, don't hesitate:
$(contact_us)
EOF
remind
finish_cleanup
}
finish_uninstall_success() {
ok "Alright! Nix should be removed!"
cat <<EOF
If you spot anything this uninstaller missed or have feedback,
don't hesitate:
$(contact_us)
EOF
remind
finish_cleanup
}
remove_nix_artifacts() {
failure "Not implemented yet"
}
cure_artifacts() {
poly_cure_artifacts
# remove_nix_artifacts (LATER)
}
validate_starting_assumptions() {
if type nix-env 2> /dev/null >&2; then
warning <<EOF
Nix already appears to be installed. This installer may run into issues.
If an error occurs, try manually uninstalling, then rerunning this script.
$(uninstall_directions)
EOF
fi
for profile_target in "${PROFILE_TARGETS[@]}"; do
# TODO: I think it would be good to accumulate a list of all
# of the copies so that people don't hit this 2 or 3x in
# a row for different files.
if [ -e "$profile_target$PROFILE_BACKUP_SUFFIX" ]; then
# this backup process first released in Nix 2.1
failure <<EOF
I back up shell profile/rc scripts before I add Nix to them.
I need to back up $profile_target to $profile_target$PROFILE_BACKUP_SUFFIX,
but the latter already exists.
Here's how to clean up the old backup file:
1. Back up (copy) $profile_target and $profile_target$PROFILE_BACKUP_SUFFIX
to another location, just in case.
2. Ensure $profile_target$PROFILE_BACKUP_SUFFIX does not have anything
Nix-related in it. If it does, something is probably quite
wrong. Please open an issue or get in touch immediately.
3. Once you confirm $profile_target is backed up and doesn't already
mention Nix, replace it with $profile_target$PROFILE_BACKUP_SUFFIX.
EOF
fi
done
}
setup_report() {
header "Nix config report"
row " Temp Dir" "$SCRATCH"
row " Nix Root" "$NIX_ROOT"
row " Build Users" "$NIX_USER_COUNT"
row " Build Group ID" "$NIX_BUILD_GROUP_ID"
row "Build Group Name" "$NIX_BUILD_GROUP_NAME"
if [ "${ALLOW_PREEXISTING_INSTALLATION:-}" != "" ]; then
row "Preexisting Install" "Allowed"
fi
subheader "build users:"
row " Username" "UID"
for i in $(seq 1 "$NIX_USER_COUNT"); do
row " $(nix_user_for_core "$i")" "$(nix_uid_for_core "$i")"
done
echo ""
}
create_build_group() {
local primary_group_id
task "Setting up the build group $NIX_BUILD_GROUP_NAME"
if ! poly_group_exists "$NIX_BUILD_GROUP_NAME"; then
poly_create_build_group
row " Created" "Yes"
else
primary_group_id=$(poly_group_id_get "$NIX_BUILD_GROUP_NAME")
if [ "$primary_group_id" -ne "$NIX_BUILD_GROUP_ID" ]; then
failure <<EOF
It seems the build group $NIX_BUILD_GROUP_NAME already exists, but
with the UID $primary_group_id. This script can't really handle
that right now, so I'm going to give up.
You can fix this by editing this script and changing the
NIX_BUILD_GROUP_ID variable near the top to from $NIX_BUILD_GROUP_ID
to $primary_group_id and re-run.
EOF
else
row " Exists" "Yes"
fi
fi
}
create_build_user_for_core() {
local coreid
local username
local uid
coreid="$1"
username=$(nix_user_for_core "$coreid")
uid=$(nix_uid_for_core "$coreid")
task "Setting up the build user $username"
if ! poly_user_exists "$username"; then
poly_create_build_user "$username" "$uid" "$coreid"
row " Created" "Yes"
else
actual_uid=$(poly_user_id_get "$username")
if [ "$actual_uid" != "$uid" ]; then
failure <<EOF
It seems the build user $username already exists, but with the UID
with the UID '$actual_uid'. This script can't really handle that right
now, so I'm going to give up.
If you already created the users and you know they start from
$actual_uid and go up from there, you can edit this script and change
NIX_FIRST_BUILD_UID near the top of the file to $actual_uid and try
again.
EOF
else
row " Exists" "Yes"
fi
fi
if [ "$(poly_user_hidden_get "$username")" = "1" ]; then
row " Hidden" "Yes"
else
poly_user_hidden_set "$username"
row " Hidden" "Yes"
fi
if [ "$(poly_user_home_get "$username")" = "/var/empty" ]; then
row " Home Directory" "/var/empty"
else
poly_user_home_set "$username" "/var/empty"
row " Home Directory" "/var/empty"
fi
# We use grep instead of an equality check because it is difficult
# to extract _just_ the user's note, instead it is prefixed with
# some plist junk. This was causing the user note to always be set,
# even if there was no reason for it.
if ! poly_user_note_get "$username" | grep -q "Nix build user $coreid"; then
row " Note" "Nix build user $coreid"
else
poly_user_note_set "$username" "Nix build user $coreid"
row " Note" "Nix build user $coreid"
fi
if [ "$(poly_user_shell_get "$username")" = "/sbin/nologin" ]; then
row " Logins Disabled" "Yes"
else
poly_user_shell_set "$username" "/sbin/nologin"
row " Logins Disabled" "Yes"
fi
if poly_user_in_group_check "$username" "$NIX_BUILD_GROUP_NAME"; then
row " Member of $NIX_BUILD_GROUP_NAME" "Yes"
else
poly_user_in_group_set "$username" "$NIX_BUILD_GROUP_NAME"
row " Member of $NIX_BUILD_GROUP_NAME" "Yes"
fi
if [ "$(poly_user_primary_group_get "$username")" = "$NIX_BUILD_GROUP_ID" ]; then
row " PrimaryGroupID" "$NIX_BUILD_GROUP_ID"
else
poly_user_primary_group_set "$username" "$NIX_BUILD_GROUP_ID"
row " PrimaryGroupID" "$NIX_BUILD_GROUP_ID"
fi
}
create_build_users() {
for i in $(seq 1 "$NIX_USER_COUNT"); do
create_build_user_for_core "$i"
done
}
create_directories() {
# FIXME: remove all of this because it duplicates LocalStore::LocalStore().
task "Setting up the basic directory structure"
if [ -d "$NIX_ROOT" ]; then
# if /nix already exists, take ownership
#
# Caution: notes below are macOS-y
# This is a bit of a goldilocks zone for taking ownership
# if there are already files on the volume; the volume is
# now mounted, but we haven't added a bunch of new files
# this is probably a bit slow; I've been seeing 3.3-4s even
# when promptly installed over a fresh single-user install.
# In case anyone's aware of a shortcut.
# `|| true`: .Trashes errors w/o full disk perm
# rumor per #4488 that macOS 11.2 may not have
# sbin on path, and that's where chown is, but
# since this bit is cross-platform:
# - first try with `command -vp` to try and find
# chown in the usual places
# - fall back on `command -v` which would find
# any chown on path
# if we don't find one, the command is already
# hiding behind || true, and the general state
# should be one the user can repair once they
# figure out where chown is...
local get_chr_own="$(command -vp chown)"
if [[ -z "$get_chr_own" ]]; then
get_chr_own="$(command -v chown)"
fi
_sudo "to take root ownership of existing Nix store files" \
"$get_chr_own" -R "root:$NIX_BUILD_GROUP_NAME" "$NIX_ROOT" || true
fi
_sudo "to make the basic directory structure of Nix (part 1)" \
install -dv -m 0755 /nix /nix/var /nix/var/log /nix/var/log/nix /nix/var/log/nix/drvs /nix/var/nix{,/db,/gcroots,/profiles,/temproots,/userpool} /nix/var/nix/{gcroots,profiles}/per-user
_sudo "to make the basic directory structure of Nix (part 2)" \
install -dv -g "$NIX_BUILD_GROUP_NAME" -m 1775 /nix/store
_sudo "to place the default nix daemon configuration (part 1)" \
install -dv -m 0555 /etc/nix
}
place_channel_configuration() {
if [ -z "${NIX_INSTALLER_NO_CHANNEL_ADD:-}" ]; then
echo "https://nixos.org/channels/nixpkgs-unstable nixpkgs" > "$SCRATCH/.nix-channels"
_sudo "to set up the default system channel (part 1)" \
install -m 0664 "$SCRATCH/.nix-channels" "$ROOT_HOME/.nix-channels"
fi
}
welcome_to_nix() {
ok "Welcome to the Multi-User Nix Installation"
cat <<EOF
This installation tool will set up your computer with the Nix package
manager. This will happen in a few stages:
1. Make sure your computer doesn't already have Nix. If it does, I
will show you instructions on how to clean up your old install.
2. Show you what I am going to install and where. Then I will ask
if you are ready to continue.
3. Create the system users and groups that the Nix daemon uses to run
builds.
4. Perform the basic installation of the Nix files daemon.
5. Configure your shell to import special Nix Profile files, so you
can use Nix.
6. Start the Nix daemon.
EOF
if ui_confirm "Would you like to see a more detailed list of what I will do?"; then
cat <<EOF
I will:
- make sure your computer doesn't already have Nix files
(if it does, I will tell you how to clean them up.)
- create local users (see the list above for the users I'll make)
- create a local group ($NIX_BUILD_GROUP_NAME)
- install Nix in to $NIX_ROOT
- create a configuration file in /etc/nix
- set up the "default profile" by creating some Nix-related files in
$ROOT_HOME
EOF
for profile_target in "${PROFILE_TARGETS[@]}"; do
if [ -e "$profile_target" ]; then
cat <<EOF
- back up $profile_target to $profile_target$PROFILE_BACKUP_SUFFIX
- update $profile_target to include some Nix configuration
EOF
fi
done
poly_service_setup_note
if ! ui_confirm "Ready to continue?"; then
failure <<EOF
Okay, maybe you would like to talk to the team.
EOF
fi
fi
}
chat_about_sudo() {
header "let's talk about sudo"
if headless; then
cat <<EOF
This script is going to call sudo a lot. Normally, it would show you
exactly what commands it is running and why. However, the script is
run in a headless fashion, like this:
$ curl -L https://nixos.org/nix/install | sh
or maybe in a CI pipeline. Because of that, I'm going to skip the
verbose output in the interest of brevity.
If you would like to
see the output, try like this:
$ curl -L -o install-nix https://nixos.org/nix/install
$ sh ./install-nix
EOF
return 0
fi
cat <<EOF
This script is going to call sudo a lot. Every time I do, it'll
output exactly what it'll do, and why.
Just like this:
EOF
__sudo "to demonstrate how our sudo prompts look" \
echo "this is a sudo prompt"
cat <<EOF
This might look scary, but everything can be undone by running just a
few commands. I used to ask you to confirm each time sudo ran, but it
was too many times. Instead, I'll just ask you this one time:
EOF
if ui_confirm "Can I use sudo?"; then
ok "Yay! Thanks! Let's get going!"
else
failure <<EOF
That is okay, but I can't install.
EOF
fi
}
install_from_extracted_nix() {
task "Installing Nix"
(
cd "$EXTRACTED_NIX_PATH"
_sudo "to copy the basic Nix files to the new store at $NIX_ROOT/store" \
cp -RLp ./store/* "$NIX_ROOT/store/"
_sudo "to make the new store non-writable at $NIX_ROOT/store" \
chmod -R ugo-w "$NIX_ROOT/store/"
if [ -d "$NIX_INSTALLED_NIX" ]; then
echo " Alright! We have our first nix at $NIX_INSTALLED_NIX"
else
failure <<EOF
Something went wrong, and I didn't find Nix installed at
$NIX_INSTALLED_NIX.
EOF
fi
_sudo "to load data for the first time in to the Nix Database" \
"$NIX_INSTALLED_NIX/bin/nix-store" --load-db < ./.reginfo
echo " Just finished getting the nix database ready."
)
}
shell_source_lines() {
cat <<EOF
# Nix
if [ -e '$PROFILE_NIX_FILE' ]; then
. '$PROFILE_NIX_FILE'
fi
# End Nix
EOF
}
configure_shell_profile() {
task "Setting up shell profiles: ${PROFILE_TARGETS[*]}"
for profile_target in "${PROFILE_TARGETS[@]}"; do
if [ -e "$profile_target" ]; then
_sudo "to back up your current $profile_target to $profile_target$PROFILE_BACKUP_SUFFIX" \
cp "$profile_target" "$profile_target$PROFILE_BACKUP_SUFFIX"
else
# try to create the file if its directory exists
target_dir="$(dirname "$profile_target")"
if [ -d "$target_dir" ]; then
_sudo "to create a stub $profile_target which will be updated" \
touch "$profile_target"
fi
fi
if [ -e "$profile_target" ]; then
shell_source_lines \
| _sudo "extend your $profile_target with nix-daemon settings" \
tee -a "$profile_target"
fi
done
# TODO: should we suggest '. $PROFILE_NIX_FILE'? It would get them on
# their way less disruptively, but a counter-argument is that they won't
# immediately notice if something didn't get set up right?
reminder "Nix won't work in active shell sessions until you restart them."
}
cert_in_store() {
# in a subshell
# - change into the cert-file dir
# - get the phyiscal pwd
# and test if this path is in the Nix store
[[ "$(cd -- "$(dirname "$NIX_SSL_CERT_FILE")" && exec pwd -P)" == "$NIX_ROOT/store/"* ]]
}
setup_default_profile() {
task "Setting up the default profile"
_sudo "to install a bootstrapping Nix in to the default profile" \
HOME="$ROOT_HOME" "$NIX_INSTALLED_NIX/bin/nix-env" -i "$NIX_INSTALLED_NIX"
if [ -z "${NIX_SSL_CERT_FILE:-}" ] || ! [ -f "${NIX_SSL_CERT_FILE:-}" ] || cert_in_store; then
_sudo "to install a bootstrapping SSL certificate just for Nix in to the default profile" \
HOME="$ROOT_HOME" "$NIX_INSTALLED_NIX/bin/nix-env" -i "$NIX_INSTALLED_CACERT"
export NIX_SSL_CERT_FILE=/nix/var/nix/profiles/default/etc/ssl/certs/ca-bundle.crt
fi
if [ -z "${NIX_INSTALLER_NO_CHANNEL_ADD:-}" ]; then
# Have to explicitly pass NIX_SSL_CERT_FILE as part of the sudo call,
# otherwise it will be lost in environments where sudo doesn't pass
# all the environment variables by default.
if ! _sudo "to update the default channel in the default profile" \
HOME="$ROOT_HOME" NIX_SSL_CERT_FILE="$NIX_SSL_CERT_FILE" "$NIX_INSTALLED_NIX/bin/nix-channel" --update nixpkgs; then
reminder <<EOF
I had trouble fetching the nixpkgs channel (are you offline?)
To try again later, run: sudo -i nix-channel --update nixpkgs
EOF
fi
fi
}
place_nix_configuration() {
cat <<EOF > "$SCRATCH/nix.conf"
$NIX_EXTRA_CONF
build-users-group = $NIX_BUILD_GROUP_NAME
EOF
_sudo "to place the default nix daemon configuration (part 2)" \
install -m 0664 "$SCRATCH/nix.conf" /etc/nix/nix.conf
}
main() {
# TODO: I've moved this out of validate_starting_assumptions so we
# can fail faster in this case. Sourcing install-darwin... now runs
# `touch /` to detect Read-only root, but it could update times on
# pre-Catalina macOS if run as root user.
if [ $EUID -eq 0 ]; then
failure <<EOF
Please do not run this script with root privileges. I will call sudo
when I need to.
EOF
fi
if [ "$(uname -s)" = "Darwin" ]; then
# shellcheck source=./install-darwin-multi-user.sh
. "$EXTRACTED_NIX_PATH/install-darwin-multi-user.sh"
elif [ "$(uname -s)" = "Linux" ]; then
# shellcheck source=./install-systemd-multi-user.sh
. "$EXTRACTED_NIX_PATH/install-systemd-multi-user.sh" # most of this works on non-systemd distros also
else
failure "Sorry, I don't know what to do on $(uname)"
fi
welcome_to_nix
chat_about_sudo
cure_artifacts
# TODO: there's a tension between cure and validate. I moved the
# the sudo/root check out of validate to the head of this func.
# Cure is *intended* to subsume the validate-and-abort approach,
# so it may eventually obsolete it.
validate_starting_assumptions
setup_report
if ! ui_confirm "Ready to continue?"; then
ok "Alright, no changes have been made :)"
get_help
trap finish_cleanup EXIT
exit 1
fi
poly_prepare_to_install
create_build_group
create_build_users
create_directories
place_channel_configuration
install_from_extracted_nix
configure_shell_profile
set +eu
# shellcheck disable=SC1091
. /etc/profile
set -eu
setup_default_profile
place_nix_configuration
poly_configure_nix_daemon_service
trap finish_success EXIT
}
# set an empty initial arg for bare invocations in case we need to
# disambiguate someone directly invoking this later.
if [ "${#@}" = 0 ]; then
set ""
fi
# ACTION for override
case "${1-}" in
# uninstall)
# shift
# uninstall "$@";;
# install == same as the no-arg condition for now (but, explicit)
""|install)
main;;
*) # holding space for future options (like uninstall + install?)
failure "install-multi-user: invalid argument";;
esac
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