800 lines
		
	
	
	
		
			22 KiB
		
	
	
	
		
			Bash
		
	
	
	
	
	
			
		
		
	
	
			800 lines
		
	
	
	
		
			22 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[38;1m'
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readonly BLUE='\033[38;34m'
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readonly BLUE_UL='\033[38;4;34m'
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readonly GREEN='\033[38;32m'
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readonly GREEN_UL='\033[38;4;32m'
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readonly RED='\033[38;31m'
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readonly RED_UL='\033[38;4;31m'
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readonly YELLOW='\033[38;33m'
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readonly YELLOW_UL='\033[38;4;33m'
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readonly 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 PROFILE_TARGETS=("/etc/bashrc" "/etc/profile.d/nix.sh" "/etc/zshrc")
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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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function finish_success {
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    finish_cleanup
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    ok "Alright! We're done!"
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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 [ $EUID -eq 0 ]; then
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        failure <<EOF
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Please do not run this script with root privileges. We will call sudo
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when we need to.
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EOF
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    fi
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    if type nix-env 2> /dev/null >&2; then
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        failure <<EOF
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Nix already appears to be installed, and this tool assumes it is
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_not_ yet installed.
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$(uninstall_directions)
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EOF
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    fi
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    if [ "${NIX_REMOTE:-}" != "" ]; then
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        failure <<EOF
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For some reason, \$NIX_REMOTE is set. It really should not be set
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before this installer runs, and it hints that Nix is currently
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installed. Please delete the old Nix installation and start again.
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Note: You might need to close your shell window and open a new shell
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to clear the variable.
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EOF
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    fi
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    if echo "${SSL_CERT_FILE:-}" | grep -qE "(nix/var/nix|nix-profile)"; then
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        failure <<EOF
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It looks like \$SSL_CERT_FILE is set to a path that used to be part of
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the old Nix installation. Please unset that variable and try again:
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  $ unset SSL_CERT_FILE
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EOF
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    fi
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    for file in ~/.bash_profile ~/.bash_login ~/.profile ~/.zshenv ~/.zprofile ~/.zshrc ~/.zlogin; do
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        if [ -f "$file" ]; then
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            if grep -l "^[^#].*.nix-profile" "$file"; then
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                failure <<EOF
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I found a reference to a ".nix-profile" in $file.
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This has a high chance of breaking a new nix installation. It was most
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likely put there by a previous Nix installer.
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Please remove this reference and try running this again. You should
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also look for similar references in:
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 - ~/.bash_profile
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 - ~/.bash_login
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 - ~/.profile
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or other shell init files that you may have.
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$(uninstall_directions)
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EOF
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            fi
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        fi
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    done
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    if [ -d /nix ]; then
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        failure <<EOF
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There are some relics of a previous installation of Nix at /nix, and
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this scripts assumes Nix is _not_ yet installed. Please delete the old
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Nix installation and start again.
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$(uninstall_directions)
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EOF
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    fi
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    if [ -d /etc/nix ]; then
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        failure <<EOF
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There are some relics of a previous installation of Nix at /etc/nix, and
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this scripts assumes Nix is _not_ yet installed. Please delete the old
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Nix installation and start again.
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$(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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3. Take care to make sure that $profile_target doesn't look like it has
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anything nix-related in it. If it does, and $profile_target _did not_,
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run:
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  $ /usr/bin/sudo /bin/mv $profile_target$PROFILE_BACKUP_SUFFIX $profile_target
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and try again.
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EOF
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        fi
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        if [ -e "$profile_target" ] && grep -qi "nix" "$profile_target"; then
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            failure <<EOF
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It looks like $profile_target already has some Nix configuration in
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there. There should be no reason to run this again. If you're having
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trouble, please open an issue.
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EOF
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        fi
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    done
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    danger_paths=("$ROOT_HOME/.nix-defexpr" "$ROOT_HOME/.nix-channels" "$ROOT_HOME/.nix-profile")
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    for danger_path in "${danger_paths[@]}"; do
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        if _sudo "making sure that $danger_path doesn't exist" \
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           test -e "$danger_path"; then
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            failure <<EOF
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I found a file at $danger_path, which is a relic of a previous
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installation. You must first delete this file before continuing.
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$(uninstall_directions)
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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 "$username")" = "1" ]; then
 | 
						|
        row "            Hidden" "Yes"
 | 
						|
    else
 | 
						|
        poly_user_hidden_set "$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 "$i"
 | 
						|
    done
 | 
						|
}
 | 
						|
 | 
						|
create_directories() {
 | 
						|
    _sudo "to make the basic directory structure of Nix (part 1)" \
 | 
						|
          mkdir -pv -m 0755 /nix /nix/var /nix/var/log /nix/var/log/nix /nix/var/log/nix/drvs /nix/var/nix{,/db,/gcroots,/profiles,/temproots,/userpool}
 | 
						|
 | 
						|
    _sudo "to make the basic directory structure of Nix (part 2)" \
 | 
						|
          mkdir -pv -m 1777 /nix/var/nix/{gcroots,profiles}/per-user
 | 
						|
 | 
						|
    _sudo "to make the basic directory structure of Nix (part 3)" \
 | 
						|
          mkdir -pv -m 1775 /nix/store
 | 
						|
 | 
						|
    _sudo "to make the basic directory structure of Nix (part 4)" \
 | 
						|
          chgrp "$NIX_BUILD_GROUP_NAME" /nix/store
 | 
						|
 | 
						|
    _sudo "to set up the root user's profile (part 1)" \
 | 
						|
          mkdir -pv -m 0755 /nix/var/nix/profiles/per-user/root
 | 
						|
 | 
						|
    _sudo "to set up the root user's profile (part 2)" \
 | 
						|
          mkdir -pv -m 0700 "$ROOT_HOME/.nix-defexpr"
 | 
						|
 | 
						|
    _sudo "to place the default nix daemon configuration (part 1)" \
 | 
						|
          mkdir -pv -m 0555 /etc/nix
 | 
						|
}
 | 
						|
 | 
						|
place_channel_configuration() {
 | 
						|
    echo "https://nixos.org/channels/nixpkgs-unstable nixpkgs" > "$SCRATCH/.nix-channels"
 | 
						|
    _sudo "to set up the default system channel (part 1)" \
 | 
						|
          install -m 0664 "$SCRATCH/.nix-channels" "$ROOT_HOME/.nix-channels"
 | 
						|
}
 | 
						|
 | 
						|
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 one.
 | 
						|
 | 
						|
2. Show you what we are going to install and where. Then we 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 we will do?"; then
 | 
						|
        cat <<EOF
 | 
						|
 | 
						|
We 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 we'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 https://nixos.org/nix/install | sh
 | 
						|
 | 
						|
or maybe in a CI pipeline. Because of that, we're going to skip the
 | 
						|
verbose output in the interest of brevity.
 | 
						|
 | 
						|
If you would like to
 | 
						|
see the output, try like this:
 | 
						|
 | 
						|
  $ 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 $NIX_ROOT/store" \
 | 
						|
              rsync -rlpt ./store/* "$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
 | 
						|
 | 
						|
    # 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" "$NIX_INSTALLED_NIX/bin/nix-channel" --update nixpkgs
 | 
						|
}
 | 
						|
 | 
						|
 | 
						|
place_nix_configuration() {
 | 
						|
    cat <<EOF > "$SCRATCH/nix.conf"
 | 
						|
build-users-group = $NIX_BUILD_GROUP_NAME
 | 
						|
 | 
						|
max-jobs = $NIX_USER_COUNT
 | 
						|
cores = 1
 | 
						|
sandbox = false
 | 
						|
EOF
 | 
						|
    _sudo "to place the default nix daemon configuration (part 2)" \
 | 
						|
          install -m 0664 "$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 [ "$(uname -s)" = "Linux" ] && [ -e /run/systemd/system ]; then
 | 
						|
        # shellcheck source=./install-systemd-multi-user.sh
 | 
						|
        . "$EXTRACTED_NIX_PATH/install-systemd-multi-user.sh"
 | 
						|
    else
 | 
						|
        failure "Sorry, I don't know what to do on $(uname)"
 | 
						|
    fi
 | 
						|
 | 
						|
    welcome_to_nix
 | 
						|
    chat_about_sudo
 | 
						|
 | 
						|
    if [ "${ALLOW_PREEXISTING_INSTALLATION:-}" = "" ]; then
 | 
						|
        validate_starting_assumptions
 | 
						|
    fi
 | 
						|
 | 
						|
    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
 |