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-rw-r--r--krebs/3modules/bindfs.nix61
1 files changed, 61 insertions, 0 deletions
diff --git a/krebs/3modules/bindfs.nix b/krebs/3modules/bindfs.nix
new file mode 100644
index 000000000..7e3730e86
--- /dev/null
+++ b/krebs/3modules/bindfs.nix
@@ -0,0 +1,61 @@
+with import <stockholm/lib>;
+{ config, pkgs, ... }:
+let
+ cfg = config.krebs.bindfs;
+in {
+ options.krebs.bindfs = mkOption {
+ type = types.attrsOf (types.submodule ({ config, ... }: {
+ options = {
+ target = mkOption {
+ description = ''
+ destination where bindfs mounts to.
+ second positional argument to bindfs.
+ '';
+ default = config._module.args.name;
+ type = types.absolute-pathname;
+ };
+ source = mkOption {
+ description = ''
+ source folder where the mounted directory is originally.
+ first positional argument to bindfs.
+ '';
+ type = types.absolute-pathname;
+ };
+ options = mkOption {
+ description = ''
+ additional arguments to bindfs
+ '';
+ type = types.listOf types.str;
+ default = [];
+ };
+ clearTarget = mkOption {
+ description = ''
+ whether to clear the target folder before mounting
+ '';
+ type = types.bool;
+ default = false;
+ };
+ };
+ }));
+ default = {};
+ };
+
+ config = mkIf (cfg != {}) {
+ systemd.services = mapAttrs' (n: mount: let
+ name = replaceStrings [ "/" ] [ "_" ] n;
+ in nameValuePair "bindfs-${name}" {
+ wantedBy = [ "local-fs.target" ];
+ path = [ pkgs.coreutils ];
+ serviceConfig = {
+ ExecStartPre = pkgs.writeDash "bindfs-init-${name}" ''
+ ${optionalString mount.clearTarget ''
+ rm -rf '${mount.target}'
+ ''}
+ mkdir -p '${mount.source}'
+ mkdir -p '${mount.target}'
+ '';
+ ExecStart = "${pkgs.bindfs}/bin/bindfs -f ${concatStringsSep " " mount.options} ${mount.source} ${mount.target}";
+ };
+ }) cfg;
+ };
+}