spruce up powerline formatting and theme

modules/cli/bold.patch

@@ -0,0 +1,13 @@
+diff --git a/powerline.go b/powerline.go
+index 0b640ac..7778ebf 100644
+--- a/powerline.go
++++ b/powerline.go
+@@ -177,7 +177,7 @@ func (p *powerline) color(prefix string, code uint8) string {
+ }
+ 
+ func (p *powerline) fgColor(code uint8) string {
+-	return p.color("38", code)
++	return p.color("1;38", code)
+ }
+ 
+ func (p *powerline) bgColor(code uint8) string {

modules/cli/powerline.nix

@@ -1,6 +1,16 @@
 { config, pkgs, lib, ... }:
 let
+
   cfg = config.sconfig.powerline;
+
+  theme = pkgs.writeText "powerline.json" (builtins.toJSON
+    {
+      CwdFg = 15;
+      PathFg = 15;
+      PathBg = 24;
+      SeparatorFg = 16;
+    });
+
 in
 {
   options.sconfig.powerline =
@@ -12,10 +22,10 @@ in
       args = lib.mkOption {
         type = lib.types.listOf lib.types.str;
         default = [
-          "-colorize-hostname"
+          "-modules=\${remote:+'user,host,'}nix-shell,git,jobs,cwd"
-          "-cwd-mode=plain"
-          "-modules=user,host,cwd,nix-shell,git,jobs"
           "-git-assume-unchanged-size 0"
+          "-theme ${theme}"
+          "-path-aliases '~/git=~/git'"
           "-jobs $(jobs -p | wc -l)"
         ];
       };
@@ -23,11 +33,16 @@ in
 
   config = lib.mkIf cfg.enable {
 
-    environment.systemPackages = [ pkgs.powerline-go ];
+    environment.systemPackages = [
+      (pkgs.powerline-go.overrideAttrs (old: { patches = [ ./bold.patch ]; }))
+    ];
 
     programs.bash.interactiveShellInit = ''
       function _update_ps1() {
-        PS1="\n$(powerline-go ${lib.concatStringsSep " " cfg.args})$ "
+        local remote=y
+        [ "$XDG_SESSION_TYPE" = "x11" ] && unset remote
+        [ "$XDG_SESSION_TYPE" = "wayland" ] && unset remote
+        PS1="\n$(powerline-go ${lib.concatStringsSep " " cfg.args})"
       }
       [ "$TERM" = "linux" ] || PROMPT_COMMAND="_update_ps1; $PROMPT_COMMAND"
     '';