712 lines
20 KiB
Bash
712 lines
20 KiB
Bash
#!/usr/bin/env bash
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set -eu
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set -o pipefail
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# Sourced from:
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# - https://github.com/LnL7/nix-darwin/blob/8c29d0985d74b4a990238497c47a2542a5616b3c/bootstrap.sh
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# - https://gist.github.com/expipiplus1/e571ce88c608a1e83547c918591b149f/ac504c6c1b96e65505fbda437a28ce563408ecb0
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# - https://github.com/NixOS/nixos-org-configurations/blob/a122f418797713d519aadf02e677fce0dc1cb446/delft/scripts/nix-mac-installer.sh
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# - https://github.com/matthewbauer/macNixOS/blob/f6045394f9153edea417be90c216788e754feaba/install-macNixOS.sh
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# - https://gist.github.com/LnL7/9717bd6cdcb30b086fd7f2093e5f8494/86b26f852ce563e973acd30f796a9a416248c34a
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#
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# however tracking which bits came from which would be impossible.
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readonly ESC='\033[0m'
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readonly BOLD='\033[1m'
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readonly BLUE='\033[34m'
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readonly BLUE_UL='\033[4;34m'
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readonly GREEN='\033[32m'
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readonly GREEN_UL='\033[4;32m'
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readonly RED='\033[31m'
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# installer allows overriding build user count to speed up installation
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# as creating each user takes non-trivial amount of time on macos
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readonly NIX_USER_COUNT=${NIX_USER_COUNT:-32}
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readonly NIX_BUILD_GROUP_ID="30000"
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readonly NIX_BUILD_GROUP_NAME="nixbld"
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readonly NIX_FIRST_BUILD_UID="30001"
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# Please don't change this. We don't support it, because the
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# default shell profile that comes with Nix doesn't support it.
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readonly NIX_ROOT="/nix"
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readonly NIX_EXTRA_CONF=${NIX_EXTRA_CONF:-}
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readonly PROFILE_TARGETS=("/etc/bashrc" "/etc/profile.d/nix.sh" "/etc/zshenv")
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readonly PROFILE_BACKUP_SUFFIX=".backup-before-nix"
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readonly PROFILE_NIX_FILE="$NIX_ROOT/var/nix/profiles/default/etc/profile.d/nix-daemon.sh"
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readonly NIX_INSTALLED_NIX="@nix@"
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readonly NIX_INSTALLED_CACERT="@cacert@"
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readonly EXTRACTED_NIX_PATH="$(dirname "$0")"
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readonly ROOT_HOME=$(echo ~root)
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if [ -t 0 ]; then
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readonly IS_HEADLESS='no'
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else
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readonly IS_HEADLESS='yes'
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fi
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headless() {
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if [ "$IS_HEADLESS" = "yes" ]; then
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return 0
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else
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return 1
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fi
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}
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contactme() {
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echo "We'd love to help if you need it."
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echo ""
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echo "If you can, open an issue at https://github.com/nixos/nix/issues"
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echo ""
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echo "Or feel free to contact the team,"
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echo " - on IRC #nixos on irc.freenode.net"
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echo " - on twitter @nixos_org"
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}
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uninstall_directions() {
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subheader "Uninstalling nix:"
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local step=0
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if poly_service_installed_check; then
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step=$((step + 1))
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poly_service_uninstall_directions "$step"
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fi
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for profile_target in "${PROFILE_TARGETS[@]}"; do
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if [ -e "$profile_target" ] && [ -e "$profile_target$PROFILE_BACKUP_SUFFIX" ]; then
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step=$((step + 1))
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cat <<EOF
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$step. Restore $profile_target$PROFILE_BACKUP_SUFFIX back to $profile_target
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sudo mv $profile_target$PROFILE_BACKUP_SUFFIX $profile_target
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(after this one, you may need to re-open any terminals that were
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opened while it existed.)
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EOF
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fi
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done
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step=$((step + 1))
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cat <<EOF
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$step. Delete the files Nix added to your system:
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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
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and that is it.
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EOF
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}
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nix_user_for_core() {
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printf "nixbld%d" "$1"
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}
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nix_uid_for_core() {
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echo $((NIX_FIRST_BUILD_UID + $1 - 1))
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}
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_textout() {
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echo -en "$1"
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shift
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if [ "$*" = "" ]; then
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cat
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else
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echo "$@"
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fi
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echo -en "$ESC"
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}
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header() {
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follow="---------------------------------------------------------"
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header=$(echo "---- $* $follow$follow$follow" | head -c 80)
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echo ""
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_textout "$BLUE" "$header"
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}
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warningheader() {
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follow="---------------------------------------------------------"
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header=$(echo "---- $* $follow$follow$follow" | head -c 80)
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echo ""
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_textout "$RED" "$header"
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}
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subheader() {
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echo ""
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_textout "$BLUE_UL" "$*"
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}
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row() {
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printf "$BOLD%s$ESC:\\t%s\\n" "$1" "$2"
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}
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task() {
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echo ""
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ok "~~> $1"
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}
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bold() {
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echo "$BOLD$*$ESC"
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}
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ok() {
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_textout "$GREEN" "$@"
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}
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warning() {
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warningheader "warning!"
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cat
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echo ""
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}
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failure() {
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header "oh no!"
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_textout "$RED" "$@"
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echo ""
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_textout "$RED" "$(contactme)"
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trap finish_cleanup EXIT
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exit 1
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}
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ui_confirm() {
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_textout "$GREEN$GREEN_UL" "$1"
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if headless; then
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echo "No TTY, assuming you would say yes :)"
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return 0
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fi
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local prompt="[y/n] "
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echo -n "$prompt"
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while read -r y; do
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if [ "$y" = "y" ]; then
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echo ""
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return 0
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elif [ "$y" = "n" ]; then
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echo ""
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return 1
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else
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_textout "$RED" "Sorry, I didn't understand. I can only understand answers of y or n"
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echo -n "$prompt"
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fi
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done
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echo ""
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return 1
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}
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__sudo() {
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local expl="$1"
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local cmd="$2"
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shift
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header "sudo execution"
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echo "I am executing:"
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echo ""
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printf " $ sudo %s\\n" "$cmd"
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echo ""
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echo "$expl"
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echo ""
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return 0
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}
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_sudo() {
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local expl="$1"
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shift
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if ! headless; then
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__sudo "$expl" "$*"
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fi
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sudo "$@"
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}
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readonly SCRATCH=$(mktemp -d -t tmp.XXXXXXXXXX)
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function finish_cleanup {
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rm -rf "$SCRATCH"
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}
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function finish_fail {
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finish_cleanup
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failure <<EOF
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Jeeze, something went wrong. If you can take all the output and open
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an issue, we'd love to fix the problem so nobody else has this issue.
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:(
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EOF
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}
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trap finish_fail EXIT
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channel_update_failed=0
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function finish_success {
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finish_cleanup
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ok "Alright! We're done!"
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if [ "x$channel_update_failed" = x1 ]; then
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echo ""
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echo "But fetching the nixpkgs channel failed. (Are you offline?)"
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echo "To try again later, run \"sudo -i nix-channel --update nixpkgs\"."
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fi
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cat <<EOF
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Before Nix will work in your existing shells, you'll need to close
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them and open them again. Other than that, you should be ready to go.
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Try it! Open a new terminal, and type:
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$ nix-shell -p nix-info --run "nix-info -m"
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Thank you for using this installer. If you have any feedback, don't
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hesitate:
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$(contactme)
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EOF
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}
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validate_starting_assumptions() {
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poly_validate_assumptions
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if [ $EUID -eq 0 ]; then
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failure <<EOF
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Please do not run this script with root privileges. We will call sudo
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when we need to.
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EOF
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fi
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if type nix-env 2> /dev/null >&2; then
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warning <<EOF
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Nix already appears to be installed. This installer may run into issues.
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If an error occurs, try manually uninstalling, then rerunning this script.
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$(uninstall_directions)
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EOF
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fi
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for profile_target in "${PROFILE_TARGETS[@]}"; do
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if [ -e "$profile_target$PROFILE_BACKUP_SUFFIX" ]; then
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failure <<EOF
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When this script runs, it backs up the current $profile_target to
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$profile_target$PROFILE_BACKUP_SUFFIX. This backup file already exists, though.
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Please follow these instructions to clean up the old backup file:
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1. Copy $profile_target and $profile_target$PROFILE_BACKUP_SUFFIX to another place, just
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in case.
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2. Take care to make sure that $profile_target$PROFILE_BACKUP_SUFFIX doesn't look like
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it has anything nix-related in it. If it does, something is probably
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quite wrong. Please open an issue or get in touch immediately.
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EOF
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fi
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done
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}
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setup_report() {
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header "Nix config report"
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row " Temp Dir" "$SCRATCH"
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row " Nix Root" "$NIX_ROOT"
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row " Build Users" "$NIX_USER_COUNT"
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row " Build Group ID" "$NIX_BUILD_GROUP_ID"
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row "Build Group Name" "$NIX_BUILD_GROUP_NAME"
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if [ "${ALLOW_PREEXISTING_INSTALLATION:-}" != "" ]; then
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row "Preexisting Install" "Allowed"
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fi
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subheader "build users:"
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row " Username" "UID"
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for i in $(seq 1 "$NIX_USER_COUNT"); do
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row " $(nix_user_for_core "$i")" "$(nix_uid_for_core "$i")"
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done
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echo ""
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}
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create_build_group() {
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local primary_group_id
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task "Setting up the build group $NIX_BUILD_GROUP_NAME"
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if ! poly_group_exists "$NIX_BUILD_GROUP_NAME"; then
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poly_create_build_group
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row " Created" "Yes"
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else
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primary_group_id=$(poly_group_id_get "$NIX_BUILD_GROUP_NAME")
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if [ "$primary_group_id" -ne "$NIX_BUILD_GROUP_ID" ]; then
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failure <<EOF
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It seems the build group $NIX_BUILD_GROUP_NAME already exists, but
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with the UID $primary_group_id. This script can't really handle
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that right now, so I'm going to give up.
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You can fix this by editing this script and changing the
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NIX_BUILD_GROUP_ID variable near the top to from $NIX_BUILD_GROUP_ID
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to $primary_group_id and re-run.
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EOF
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else
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row " Exists" "Yes"
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fi
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fi
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}
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create_build_user_for_core() {
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local coreid
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local username
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local uid
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coreid="$1"
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username=$(nix_user_for_core "$coreid")
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uid=$(nix_uid_for_core "$coreid")
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task "Setting up the build user $username"
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if ! poly_user_exists "$username"; then
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poly_create_build_user "$username" "$uid" "$coreid"
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row " Created" "Yes"
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else
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actual_uid=$(poly_user_id_get "$username")
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if [ "$actual_uid" != "$uid" ]; then
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failure <<EOF
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It seems the build user $username already exists, but with the UID
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with the UID '$actual_uid'. This script can't really handle that right
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now, so I'm going to give up.
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If you already created the users and you know they start from
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$actual_uid and go up from there, you can edit this script and change
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NIX_FIRST_BUILD_UID near the top of the file to $actual_uid and try
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again.
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EOF
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else
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row " Exists" "Yes"
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fi
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fi
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if [ "$(poly_user_hidden_get "$username")" = "1" ]; then
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row " Hidden" "Yes"
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else
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poly_user_hidden_set "$username"
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row " Hidden" "Yes"
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fi
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if [ "$(poly_user_home_get "$username")" = "/var/empty" ]; then
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row " Home Directory" "/var/empty"
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else
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poly_user_home_set "$username" "/var/empty"
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row " Home Directory" "/var/empty"
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fi
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# We use grep instead of an equality check because it is difficult
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# to extract _just_ the user's note, instead it is prefixed with
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# some plist junk. This was causing the user note to always be set,
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# even if there was no reason for it.
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if ! poly_user_note_get "$username" | grep -q "Nix build user $coreid"; then
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row " Note" "Nix build user $coreid"
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else
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poly_user_note_set "$username" "Nix build user $coreid"
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row " Note" "Nix build user $coreid"
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fi
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if [ "$(poly_user_shell_get "$username")" = "/sbin/nologin" ]; then
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row " Logins Disabled" "Yes"
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else
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poly_user_shell_set "$username" "/sbin/nologin"
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row " Logins Disabled" "Yes"
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fi
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if poly_user_in_group_check "$username" "$NIX_BUILD_GROUP_NAME"; then
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row " Member of $NIX_BUILD_GROUP_NAME" "Yes"
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else
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poly_user_in_group_set "$username" "$NIX_BUILD_GROUP_NAME"
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row " Member of $NIX_BUILD_GROUP_NAME" "Yes"
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fi
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if [ "$(poly_user_primary_group_get "$username")" = "$NIX_BUILD_GROUP_ID" ]; then
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row " PrimaryGroupID" "$NIX_BUILD_GROUP_ID"
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else
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poly_user_primary_group_set "$username" "$NIX_BUILD_GROUP_ID"
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row " PrimaryGroupID" "$NIX_BUILD_GROUP_ID"
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fi
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}
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create_build_users() {
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for i in $(seq 1 "$NIX_USER_COUNT"); do
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create_build_user_for_core "$i"
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done
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}
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create_directories() {
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# FIXME: remove all of this because it duplicates LocalStore::LocalStore().
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_sudo "to make the basic directory structure of Nix (part 1)" \
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mkdir -pv -m 0755 /nix /nix/var /nix/var/log /nix/var/log/nix /nix/var/log/nix/drvs /nix/var/nix{,/db,/gcroots,/profiles,/temproots,/userpool} /nix/var/nix/{gcroots,profiles}/per-user
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_sudo "to make the basic directory structure of Nix (part 2)" \
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mkdir -pv -m 1775 /nix/store
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_sudo "to make the basic directory structure of Nix (part 3)" \
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chgrp "$NIX_BUILD_GROUP_NAME" /nix/store
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_sudo "to place the default nix daemon configuration (part 1)" \
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mkdir -pv -m 0555 /etc/nix
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}
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place_channel_configuration() {
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if [ -z "${NIX_INSTALLER_NO_CHANNEL_ADD:-}" ]; then
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echo "https://nixos.org/channels/nixpkgs-unstable nixpkgs" > "$SCRATCH/.nix-channels"
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_sudo "to set up the default system channel (part 1)" \
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install -m 0664 "$SCRATCH/.nix-channels" "$ROOT_HOME/.nix-channels"
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fi
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}
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welcome_to_nix() {
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ok "Welcome to the Multi-User Nix Installation"
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cat <<EOF
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This installation tool will set up your computer with the Nix package
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manager. This will happen in a few stages:
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1. Make sure your computer doesn't already have Nix. If it does, I
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will show you instructions on how to clean up your old one.
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2. Show you what we are going to install and where. Then we will ask
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if you are ready to continue.
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3. Create the system users and groups that the Nix daemon uses to run
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builds.
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4. Perform the basic installation of the Nix files daemon.
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5. Configure your shell to import special Nix Profile files, so you
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can use Nix.
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6. Start the Nix daemon.
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EOF
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if ui_confirm "Would you like to see a more detailed list of what we will do?"; then
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cat <<EOF
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We will:
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- make sure your computer doesn't already have Nix files
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(if it does, I will tell you how to clean them up.)
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- create local users (see the list above for the users we'll make)
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- create a local group ($NIX_BUILD_GROUP_NAME)
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- install Nix in to $NIX_ROOT
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- create a configuration file in /etc/nix
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- set up the "default profile" by creating some Nix-related files in
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$ROOT_HOME
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EOF
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for profile_target in "${PROFILE_TARGETS[@]}"; do
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if [ -e "$profile_target" ]; then
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cat <<EOF
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- back up $profile_target to $profile_target$PROFILE_BACKUP_SUFFIX
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- update $profile_target to include some Nix configuration
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EOF
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fi
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done
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poly_service_setup_note
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if ! ui_confirm "Ready to continue?"; then
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failure <<EOF
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Okay, maybe you would like to talk to the team.
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EOF
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fi
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fi
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}
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chat_about_sudo() {
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header "let's talk about sudo"
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if headless; then
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cat <<EOF
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This script is going to call sudo a lot. Normally, it would show you
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exactly what commands it is running and why. However, the script is
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run in a headless fashion, like this:
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$ curl https://nixos.org/nix/install | sh
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or maybe in a CI pipeline. Because of that, we're going to skip the
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verbose output in the interest of brevity.
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If you would like to
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see the output, try like this:
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$ curl -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 we 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. We 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 we use sudo?"; then
|
|
ok "Yay! Thanks! Let's get going!"
|
|
else
|
|
failure <<EOF
|
|
That is okay, but we can't install.
|
|
EOF
|
|
fi
|
|
}
|
|
|
|
install_from_extracted_nix() {
|
|
(
|
|
cd "$EXTRACTED_NIX_PATH"
|
|
|
|
_sudo "to copy the basic Nix files to the new store at $NIX_ROOT/store" \
|
|
rsync -rlpt --chmod=-w ./store/* "$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
|
|
$NIX_INSTALLED_NIX.
|
|
EOF
|
|
fi
|
|
|
|
cat ./.reginfo \
|
|
| _sudo "to load data for the first time in to the Nix Database" \
|
|
"$NIX_INSTALLED_NIX/bin/nix-store" --load-db
|
|
|
|
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() {
|
|
# If there is an /etc/profile.d directory, we want to ensure there
|
|
# is a nix.sh within it, so we can use the following loop to add
|
|
# the source lines to it. Note that I'm _not_ adding the source
|
|
# lines here, because we want to be using the regular machinery.
|
|
#
|
|
# If we go around that machinery, it becomes more complicated and
|
|
# adds complications to the uninstall instruction generator and
|
|
# old instruction sniffer as well.
|
|
if [ -d /etc/profile.d ]; then
|
|
_sudo "create a stub /etc/profile.d/nix.sh which will be updated" \
|
|
touch /etc/profile.d/nix.sh
|
|
fi
|
|
|
|
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"
|
|
|
|
shell_source_lines \
|
|
| _sudo "extend your $profile_target with nix-daemon settings" \
|
|
tee -a "$profile_target"
|
|
fi
|
|
done
|
|
}
|
|
|
|
setup_default_profile() {
|
|
_sudo "to installing 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 "${NIX_SSL_CERT_FILE:-}" ]; then
|
|
_sudo "to installing a bootstrapping SSL certificate just for Nix in to the default Profile" \
|
|
HOME="$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 "${NIX_INSTALLER_NO_CHANNEL_ADD:-}" ]; then
|
|
# Have to explicitly pass NIX_SSL_CERT_FILE as part of the sudo call,
|
|
# otherwise it will be lost in environments where sudo doesn't pass
|
|
# all the environment variables by default.
|
|
_sudo "to update the default channel in the default profile" \
|
|
HOME="$ROOT_HOME" NIX_SSL_CERT_FILE="$NIX_SSL_CERT_FILE" "$NIX_INSTALLED_NIX/bin/nix-channel" --update nixpkgs \
|
|
|| channel_update_failed=1
|
|
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() {
|
|
if [ "$(uname -s)" = "Darwin" ]; then
|
|
# shellcheck source=./install-darwin-multi-user.sh
|
|
. "$EXTRACTED_NIX_PATH/install-darwin-multi-user.sh"
|
|
elif [ "$(uname -s)" = "Linux" ]; then
|
|
if [ -e /run/systemd/system ]; then
|
|
# shellcheck source=./install-systemd-multi-user.sh
|
|
. "$EXTRACTED_NIX_PATH/install-systemd-multi-user.sh"
|
|
else
|
|
failure "Sorry, the multi-user installation requires systemd on Linux (detected using /run/systemd/system)"
|
|
fi
|
|
else
|
|
failure "Sorry, I don't know what to do on $(uname)"
|
|
fi
|
|
|
|
welcome_to_nix
|
|
chat_about_sudo
|
|
|
|
validate_starting_assumptions
|
|
|
|
setup_report
|
|
|
|
if ! ui_confirm "Ready to continue?"; then
|
|
ok "Alright, no changes have been made :)"
|
|
contactme
|
|
trap finish_cleanup EXIT
|
|
exit 1
|
|
fi
|
|
|
|
create_build_group
|
|
create_build_users
|
|
create_directories
|
|
place_channel_configuration
|
|
install_from_extracted_nix
|
|
|
|
configure_shell_profile
|
|
|
|
set +eu
|
|
. /etc/profile
|
|
set -eu
|
|
|
|
setup_default_profile
|
|
place_nix_configuration
|
|
poly_configure_nix_daemon_service
|
|
|
|
trap finish_success EXIT
|
|
}
|
|
|
|
|
|
main
|