119 lines
		
	
	
		
			3.6 KiB
		
	
	
	
		
			Nix
		
	
	
	
	
	
			
		
		
	
	
			119 lines
		
	
	
		
			3.6 KiB
		
	
	
	
		
			Nix
		
	
	
	
	
	
{ config, lib, pkgs, ... }:
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with lib;
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let
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  inherit (config.security) wrapperDir;
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  cfg = config.services.kbfs;
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in {
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  ###### interface
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  options = {
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    services.kbfs = {
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      enable = mkOption {
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        type = types.bool;
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        default = false;
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        description = "Whether to mount the Keybase filesystem.";
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      };
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      enableRedirector = mkOption {
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        type = types.bool;
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        default = false;
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        description = ''
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          Whether to enable the Keybase root redirector service, allowing
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          any user to access KBFS files via <literal>/keybase</literal>,
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          which will show different contents depending on the requester.
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        '';
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      };
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      mountPoint = mkOption {
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        type = types.str;
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        default = "%h/keybase";
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        example = "/keybase";
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        description = "Mountpoint for the Keybase filesystem.";
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      };
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      extraFlags = mkOption {
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        type = types.listOf types.str;
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        default = [];
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        example = [
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          "-label kbfs"
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          "-mount-type normal"
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        ];
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        description = ''
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          Additional flags to pass to the Keybase filesystem on launch.
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        '';
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      };
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    };
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  };
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  ###### implementation
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  config = mkIf cfg.enable (mkMerge [
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    {
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      # Upstream: https://github.com/keybase/client/blob/master/packaging/linux/systemd/kbfs.service
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      systemd.user.services.kbfs = {
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        description = "Keybase File System";
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        # Note that the "Requires" directive will cause a unit to be restarted whenever its dependency is restarted.
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        # Do not issue a hard dependency on keybase, because kbfs can reconnect to a restarted service.
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        # Do not issue a hard dependency on keybase-redirector, because it's ok if it fails (e.g., if it is disabled).
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        wants = [ "keybase.service" ] ++ optional cfg.enableRedirector "keybase-redirector.service";
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        path = [ "/run/wrappers" ];
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        unitConfig.ConditionUser = "!@system";
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        serviceConfig = {
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          Type = "notify";
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          # Keybase notifies from a forked process
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          EnvironmentFile = [
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            "-%E/keybase/keybase.autogen.env"
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            "-%E/keybase/keybase.env"
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          ];
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          ExecStartPre = [
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            "${pkgs.coreutils}/bin/mkdir -p \"${cfg.mountPoint}\""
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            "-${wrapperDir}/fusermount -uz \"${cfg.mountPoint}\""
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          ];
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          ExecStart = "${pkgs.kbfs}/bin/kbfsfuse ${toString cfg.extraFlags} \"${cfg.mountPoint}\"";
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          ExecStop = "${wrapperDir}/fusermount -uz \"${cfg.mountPoint}\"";
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          Restart = "on-failure";
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          PrivateTmp = true;
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        };
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        wantedBy = [ "default.target" ];
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      };
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      services.keybase.enable = true;
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      environment.systemPackages = [ pkgs.kbfs ];
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    }
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    (mkIf cfg.enableRedirector {
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      security.wrappers."keybase-redirector".source = "${pkgs.kbfs}/bin/redirector";
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      systemd.tmpfiles.rules = [ "d /keybase 0755 root root 0" ];
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      # Upstream: https://github.com/keybase/client/blob/master/packaging/linux/systemd/keybase-redirector.service
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      systemd.user.services.keybase-redirector = {
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        description = "Keybase Root Redirector for KBFS";
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        wants = [ "keybase.service" ];
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        unitConfig.ConditionUser = "!@system";
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        serviceConfig = {
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          EnvironmentFile = [
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            "-%E/keybase/keybase.autogen.env"
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            "-%E/keybase/keybase.env"
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          ];
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          # Note: The /keybase mount point is not currently configurable upstream.
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          ExecStart = "${wrapperDir}/keybase-redirector /keybase";
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          Restart = "on-failure";
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          PrivateTmp = true;
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        };
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        wantedBy = [ "default.target" ];
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      };
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    })
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  ]);
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}
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