impermanence: enable hyphenated folder names

modules/home-manager/neovim.nix

@@ -2,8 +2,7 @@
 
 lib.mkIf config.sane.home-manager.enable
 {
-  # TODO(impermanence): re-enable!
-  # sane.impermanence.home-dirs = [ ".cache/vim-swap" ];
+  sane.impermanence.home-dirs = [ ".cache/vim-swap" ];
 
   home-manager.users.colin.programs.neovim = {
     # neovim: https://github.com/neovim/neovim

modules/impermanence/default.nix

@@ -2,7 +2,7 @@
 #   https://xeiaso.net/blog/paranoid-nixos-2021-07-18
 #   https://elis.nu/blog/2020/05/nixos-tmpfs-as-root/
 #   https://github.com/nix-community/impermanence
-{ config, lib, pkgs, ... }:
+{ config, lib, pkgs, utils, ... }:
 
 with lib;
 let
@@ -41,13 +41,7 @@ let
   };
 
   # turn a path into a name suitable for systemd
-  cleanName = path: let
-    dashes = builtins.replaceStrings ["/"] ["-"] path;
-    startswith = builtins.substring 0 1 dashes;
-  in if startswith == "-"
-    then substring 1 255 dashes
-    else dashes
-  ;
+  cleanName = utils.escapeSystemdPath;
 
   # split the string path into a list of string components.
   # root directory "/" becomes the empty list [].

modules/packages.nix

@@ -120,8 +120,7 @@ let
     networkmanagerapplet
 
     # not strictly necessary, but allows caching articles; offline use, etc.
-    # TODO(impermanence): re-enable!
-    # { pkg = newsflash; dir = [ ".local/share/news-flash" ]; }
+    { pkg = newsflash; dir = [ ".local/share/news-flash" ]; }
 
     { pkg = nheko; private = [
       ".config/nheko"  # config file (including client token)
@@ -144,8 +143,7 @@ let
     # config (e.g. server connection details) is persisted in ~/.config/sublime-music/config.json
     #   possible to pass config as a CLI arg (sublime-music -c config.json)
     # { pkg = sublime-music; dir = [ ".local/share/sublime-music" ]; }
-    # TODO(impermanence): re-enable!
-    # { pkg = sublime-music-mobile; dir = [ ".local/share/sublime-music" ]; }
+    { pkg = sublime-music-mobile; dir = [ ".local/share/sublime-music" ]; }
     tdesktop  # broken on phosh
 
     { pkg = tokodon; private = [ ".cache/KDE/tokodon" ]; }