mirror of
https://github.com/LnL7/nix-darwin.git
synced 2024-12-15 17:51:01 +00:00
346 lines
13 KiB
Nix
346 lines
13 KiB
Nix
{ config, lib, pkgs, ... }:
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with lib;
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let
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cfg = config.system.checks;
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darwinChanges = ''
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darwinChanges=/dev/null
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if test -e /run/current-system/darwin-changes; then
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darwinChanges=/run/current-system/darwin-changes
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fi
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darwinChanges=$(diff --changed-group-format='%>' --unchanged-group-format= /run/current-system/darwin-changes $systemConfig/darwin-changes 2> /dev/null) || true
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if test -n "$darwinChanges"; then
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echo >&2
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echo "[1;1mCHANGELOG[0m" >&2
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echo >&2
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echo "$darwinChanges" >&2
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echo >&2
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fi
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'';
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runLink = ''
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if [[ ! -e /run ]]; then
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printf >&2 '[1;31merror: directory /run does not exist, aborting activation[0m\n'
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exit 1
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fi
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'';
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oldBuildUsers = ''
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if dscl . -list /Users | grep -q '^nixbld'; then
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echo "[1;31merror: Detected old style nixbld users, aborting activation[0m" >&2
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echo "These can cause migration problems when upgrading to certain macOS versions" >&2
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echo "You can enable the following option to migrate to new style nixbld users" >&2
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echo >&2
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echo " nix.configureBuildUsers = true;" >&2
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echo >&2
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echo "or disable this check with" >&2
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echo >&2
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echo " system.checks.verifyBuildUsers = false;" >&2
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echo >&2
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exit 2
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fi
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'';
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preSequoiaBuildUsers = ''
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${lib.optionalString config.nix.configureBuildUsers ''
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# Don’t complain when we’re about to migrate old‐style build users…
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if ! dscl . -list /Users | grep -q '^nixbld'; then
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''}
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firstBuildUserID=$(dscl . -read /Users/_nixbld1 UniqueID | awk '{print $2}')
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if [[ $firstBuildUserID != ${toString (config.ids.uids.nixbld + 1)} ]]; then
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printf >&2 '\e[1;31merror: Build users have unexpected UIDs, aborting activation\e[0m\n'
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printf >&2 'The default Nix build user ID range has been adjusted for\n'
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printf >&2 'compatibility with macOS Sequoia 15. Your _nixbld1 user currently has\n'
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printf >&2 'UID %d rather than the new default of 351.\n' "$firstBuildUserID"
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printf >&2 '\n'
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printf >&2 'You can automatically migrate the users with the following command:\n'
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printf >&2 '\n'
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if [[ -e /nix/receipt.json ]]; then
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if
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${pkgs.jq}/bin/jq --exit-status \
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'try(.planner.settings | has("enable_flakes"))' \
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/nix/receipt.json \
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>/dev/null
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then
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installerUrl="https://install.lix.systems/lix"
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else
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installerUrl="https://install.determinate.systems/nix"
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fi
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printf >&2 " curl --proto '=https' --tlsv1.2 -sSf -L %s | sh -s -- repair sequoia --move-existing-users\n" \
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"$installerUrl"
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else
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printf >&2 " curl --proto '=https' --tlsv1.2 -sSf -L https://github.com/NixOS/nix/raw/master/scripts/sequoia-nixbld-user-migration.sh | bash -\n"
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fi
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printf >&2 '\n'
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printf >&2 'If you have no intention of upgrading to macOS Sequoia 15, or already\n'
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printf >&2 'have a custom UID range that you know is compatible with Sequoia, you\n'
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printf >&2 'can disable this check by setting:\n'
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printf >&2 '\n'
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printf >&2 ' ids.uids.nixbld = %d;\n' "$((firstBuildUserID - 1))"
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printf >&2 '\n'
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exit 2
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fi
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${lib.optionalString config.nix.configureBuildUsers "fi"}
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'';
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buildUsers = ''
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buildUser=$(dscl . -read /Groups/nixbld GroupMembership 2>&1 | awk '/^GroupMembership: / {print $2}') || true
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if [[ -z "$buildUser" ]]; then
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echo "[1;31merror: Using the nix-daemon requires build users, aborting activation[0m" >&2
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echo "Create the build users or disable the daemon:" >&2
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echo "$ darwin-install" >&2
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echo >&2
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echo "or set (this requires some manual intervention to restore permissions)" >&2
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echo >&2
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echo " services.nix-daemon.enable = false;" >&2
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echo >&2
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exit 2
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fi
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'';
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buildGroupID = ''
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buildGroupID=$(dscl . -read /Groups/nixbld PrimaryGroupID | awk '{print $2}')
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expectedBuildGroupID=${toString config.ids.gids.nixbld}
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if [[ $buildGroupID != "$expectedBuildGroupID" ]]; then
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printf >&2 '\e[1;31merror: Build user group has mismatching GID, aborting activation\e[0m\n'
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printf >&2 'The default Nix build user group ID was changed from 30000 to 350.\n'
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printf >&2 'You are currently managing Nix build users with nix-darwin, but your\n'
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printf >&2 'nixbld group has GID %d, whereas we expected %d.\n' \
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"$buildGroupID" "$expectedBuildGroupID"
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printf >&2 '\n'
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printf >&2 'Possible causes include setting up a new Nix installation with an\n'
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printf >&2 'existing nix-darwin configuration, setting up a new nix-darwin\n'
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printf >&2 'installation with an existing Nix installation, or manually increasing\n'
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# shellcheck disable=SC2016
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printf >&2 'your `system.stateVersion` setting.\n'
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printf >&2 '\n'
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printf >&2 'You can set the configured group ID to match the actual value:\n'
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printf >&2 '\n'
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printf >&2 ' ids.gids.nixbld = %d;\n' "$buildGroupID"
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printf >&2 '\n'
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printf >&2 'We do not recommend trying to change the group ID with macOS user\n'
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printf >&2 'management tools without a complete uninstallation and reinstallation\n'
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printf >&2 'of Nix.\n'
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exit 2
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fi
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'';
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singleUser = ''
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if grep -q 'build-users-group =' /etc/nix/nix.conf; then
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echo "[1;31merror: The daemon is not enabled but this is a multi-user install, aborting activation[0m" >&2
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echo "Enable the nix-daemon service:" >&2
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echo >&2
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echo " services.nix-daemon.enable = true;" >&2
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echo >&2
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echo "or set" >&2
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echo >&2
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echo " nix.useDaemon = true;" >&2
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echo >&2
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exit 2
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fi
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'';
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nixChannels = ''
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channelsLink=$(readlink "$HOME/.nix-defexpr/channels") || true
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case "$channelsLink" in
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*"$USER"*)
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;;
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"")
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;;
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*)
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echo "[1;31merror: The ~/.nix-defexpr/channels symlink does not point your users channels, aborting activation[0m" >&2
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echo "Running nix-channel will regenerate it" >&2
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echo >&2
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echo " rm ~/.nix-defexpr/channels" >&2
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echo " nix-channel --update" >&2
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echo >&2
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exit 2
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;;
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esac
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'';
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nixInstaller = ''
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if grep -q 'etc/profile.d/nix-daemon.sh' /etc/profile; then
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echo "[1;31merror: Found nix-daemon.sh reference in /etc/profile, aborting activation[0m" >&2
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echo "This will override options like nix.nixPath because it runs later," >&2
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echo "remove this snippet from /etc/profile:" >&2
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echo >&2
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echo " # Nix" >&2
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echo " if [ -e '/nix/var/nix/profiles/default/etc/profile.d/nix-daemon.sh' ]; then" >&2
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echo " . '/nix/var/nix/profiles/default/etc/profile.d/nix-daemon.sh'" >&2
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echo " fi" >&2
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echo " # End Nix" >&2
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echo >&2
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exit 2
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fi
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'';
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nixPath = ''
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nixPath=${concatStringsSep ":" config.nix.nixPath}:$HOME/.nix-defexpr/channels
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darwinConfig=$(NIX_PATH=$nixPath nix-instantiate --find-file darwin-config) || true
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if ! test -e "$darwinConfig"; then
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echo "[1;31merror: Changed <darwin-config> but target does not exist, aborting activation[0m" >&2
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echo "Create ''${darwinConfig:-~/.nixpkgs/darwin-configuration.nix} or set environment.darwinConfig:" >&2
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echo >&2
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echo " environment.darwinConfig = \"$(nix-instantiate --find-file darwin-config 2> /dev/null || echo '***')\";" >&2
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echo >&2
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echo "And rebuild using (only required once)" >&2
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echo "$ darwin-rebuild switch -I \"darwin-config=$(nix-instantiate --find-file darwin-config 2> /dev/null || echo '***')\"" >&2
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echo >&2
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echo >&2
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exit 2
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fi
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darwinPath=$(NIX_PATH=$nixPath nix-instantiate --find-file darwin) || true
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if ! test -e "$darwinPath"; then
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echo "[1;31merror: Changed <darwin> but target does not exist, aborting activation[0m" >&2
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echo "Add the darwin repo as a channel or set nix.nixPath:" >&2
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echo "$ nix-channel --add https://github.com/LnL7/nix-darwin/archive/master.tar.gz darwin" >&2
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echo "$ nix-channel --update" >&2
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echo >&2
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echo "or set" >&2
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echo >&2
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echo " nix.nixPath = [ \"darwin=$(nix-instantiate --find-file darwin 2> /dev/null || echo '***')\" ];" >&2
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echo >&2
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exit 2
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fi
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nixpkgsPath=$(NIX_PATH=$nixPath nix-instantiate --find-file nixpkgs) || true
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if ! test -e "$nixpkgsPath"; then
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echo "[1;31merror: Changed <nixpkgs> but target does not exist, aborting activation[0m" >&2
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echo "Add a nixpkgs channel or set nix.nixPath:" >&2
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echo "$ nix-channel --add http://nixos.org/channels/nixpkgs-unstable nixpkgs" >&2
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echo "$ nix-channel --update" >&2
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echo >&2
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echo "or set" >&2
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echo >&2
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echo " nix.nixPath = [ \"nixpkgs=$(nix-instantiate --find-file nixpkgs 2> /dev/null || echo '***')\" ];" >&2
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echo >&2
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exit 2
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fi
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'';
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nixStore = ''
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if test -w /nix/var/nix/db -a ! -O /nix/store; then
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echo >&2 "[1;31merror: the store is not owned by this user, but /nix/var/nix/db is writable[0m"
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echo >&2 "If you are using the daemon:"
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echo >&2
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echo >&2 " sudo chown -R root:wheel /nix/var/nix/db"
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echo >&2
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echo >&2 "Otherwise:"
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echo >&2
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echo >&2 " sudo chown -R $USER:staff /nix/store"
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echo >&2
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exit 2
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fi
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'';
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nixGarbageCollector = ''
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if test -O /nix/store; then
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echo "[1;31merror: A single-user install can't run gc as root, aborting activation[0m" >&2
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echo "Configure the garbage collector to run as the current user:" >&2
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echo >&2
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echo " nix.gc.user = \"$USER\";" >&2
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echo >&2
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exit 2
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fi
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'';
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nixStoreOptimiser = ''
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if test -O /nix/store; then
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echo "[1;31merror: A single-user install can't run optimiser as root, aborting activation[0m" >&2
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echo "Configure the optimiser to run as the current user:" >&2
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echo >&2
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echo " nix.optimise.user = \"$USER\";" >&2
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echo >&2
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exit 2
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fi
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'';
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# TODO: Remove this a couple years down the line when we can assume
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# that anyone who cares about security has upgraded.
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oldSshAuthorizedKeysDirectory = ''
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if [[ -d /etc/ssh/authorized_keys.d ]]; then
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printf >&2 '\e[1;31merror: /etc/ssh/authorized_keys.d exists, aborting activation\e[0m\n'
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printf >&2 'SECURITY NOTICE: The previous implementation of the\n'
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# shellcheck disable=SC2016
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printf >&2 '`users.users.<name>.openssh.authorizedKeys.*` options would not delete\n'
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printf >&2 'authorized keys files when the setting for a given user was removed.\n'
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printf >&2 '\n'
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printf >&2 "This means that if you previously stopped managing a user's authorized\n"
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printf >&2 'SSH keys with nix-darwin, or intended to revoke their access by\n'
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printf >&2 'removing the option, the previous set of keys could still be used to\n'
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printf >&2 'log in as that user.\n'
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printf >&2 '\n'
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printf >&2 'You can check the /etc/ssh/authorized_keys.d directory to see which\n'
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printf >&2 'keys were permitted; afterwards, please remove the directory and\n'
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printf >&2 're-run activation. The options continue to be supported and will now\n'
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printf >&2 'correctly permit only the keys in your current system configuration.\n'
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exit 2
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fi
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'';
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in
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{
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options = {
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system.checks.verifyNixPath = mkOption {
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type = types.bool;
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default = true;
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description = "Whether to run the NIX_PATH validation checks.";
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};
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system.checks.verifyNixChannels = mkOption {
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type = types.bool;
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default = config.nix.channel.enable;
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description = "Whether to run the nix-channels validation checks.";
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};
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system.checks.verifyBuildUsers = mkOption {
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type = types.bool;
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default =
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(config.nix.useDaemon && !(config.nix.settings.auto-allocate-uids or false))
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|| config.nix.configureBuildUsers;
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description = "Whether to run the Nix build users validation checks.";
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};
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system.checks.text = mkOption {
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internal = true;
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type = types.lines;
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default = "";
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};
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};
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config = {
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system.checks.text = mkMerge [
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darwinChanges
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runLink
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(mkIf (cfg.verifyBuildUsers && !config.nix.configureBuildUsers) oldBuildUsers)
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(mkIf cfg.verifyBuildUsers buildUsers)
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(mkIf cfg.verifyBuildUsers preSequoiaBuildUsers)
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(mkIf config.nix.configureBuildUsers buildGroupID)
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(mkIf (!config.nix.useDaemon) singleUser)
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nixStore
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(mkIf (config.nix.gc.automatic && config.nix.gc.user == null) nixGarbageCollector)
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(mkIf (config.nix.optimise.automatic && config.nix.optimise.user == null) nixStoreOptimiser)
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(mkIf cfg.verifyNixChannels nixChannels)
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nixInstaller
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(mkIf cfg.verifyNixPath nixPath)
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oldSshAuthorizedKeysDirectory
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];
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system.activationScripts.checks.text = ''
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${cfg.text}
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if [[ "''${checkActivation:-0}" -eq 1 ]]; then
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echo "ok" >&2
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exit 0
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fi
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'';
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};
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}
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