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nixpkgs/nixos/modules/services/network-filesystems/kbfs.nix

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Nix

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