Migrate htop configuration to home-manager

There is a module for htop, so use that one instead of home.file.
The cool thing is: It has "constants" for some strange integer values.
So nix version is actually readable while the generated config is
strange.

That's a cool pro of nix files.

home.nix

@@ -19,6 +19,9 @@
   # Let Home Manager install and manage itself.
   programs.home-manager.enable = true;
 
+  # Install packages
+  # Some are installed via `programs` below, as they are also configured.
+  # Some packages don't have a module for configuration, and are configured via `home.file` below.
   home.packages = [
     pkgs.nix
     pkgs.cacert
@@ -29,9 +32,6 @@
     pkgs.dunst
     pkgs.i3lock-color
 
-    # System monitoring
-    pkgs.htop
-
     # Dev tools
     pkgs.litecli
     pkgs.mycli
@@ -51,6 +51,9 @@
     git = import ./home/programs/git.nix {
       inherit pkgs;
     };
+    htop = import ./home/programs/htop.nix {
+      inherit config;
+    };
   };
 
   home.file = {

home/programs/htop.nix

@@ -0,0 +1,53 @@
+{ config }:
+
+{
+  enable = true;
+  settings = {
+    delay = 15;
+
+    color_scheme = 0;
+    tree_view = 0;
+
+    fields = with config.lib.htop.fields; [
+      PID
+      USER
+      PRIORITY
+      NICE
+      M_SIZE
+      M_RESIDENT
+      M_SHARE
+      STATE
+      PERCENT_CPU
+      PERCENT_MEM
+      TIME
+      COMM
+    ];
+
+    highlight_base_name = 0;
+    highlight_megabytes = 1;
+    highlight_threads = 1;
+
+    show_thread_names = 0;
+    show_program_path = 1;
+
+    hide_threads = 0;
+    hide_kernel_threads = 1;
+    hide_userland_threads = 0;
+
+    sort_key = 47;
+    sort_direction = 1;
+
+  } // (with config.lib.htop; leftMeters [
+    (bar "LeftCPUs")
+    (bar "Memory")
+    (bar "Swap")
+    (text "Zram")
+    (text "Systemd")
+  ]) // (with config.lib.htop; rightMeters [
+    (bar "RightCPUs")
+    (text "Tasks")
+    (text "LoadAverage")
+    (text "Uptime")
+    (text "Battery")
+  ]);
+}