oh-my-posh: build-time nushell config generation

modules/programs/oh-my-posh.nix

@@ -68,27 +68,26 @@ in {
     };
 
     programs.bash.initExtra = mkIf cfg.enableBashIntegration ''
-      eval "$(${cfg.package}/bin/oh-my-posh init bash ${configArgument})"
+      eval "$(${lib.getExe cfg.package} init bash ${configArgument})"
     '';
 
     programs.zsh.initContent = mkIf cfg.enableZshIntegration ''
-      eval "$(${cfg.package}/bin/oh-my-posh init zsh ${configArgument})"
+      eval "$(${lib.getExe cfg.package} init zsh ${configArgument})"
     '';
 
     programs.fish.shellInit = mkIf cfg.enableFishIntegration ''
-      ${cfg.package}/bin/oh-my-posh init fish ${configArgument} | source
+      ${lib.getExe cfg.package} init fish ${configArgument} | source
     '';
 
     programs.nushell = mkIf cfg.enableNushellIntegration {
-      extraEnv = ''
-        let oh_my_posh_cache = "${config.xdg.cacheHome}/oh-my-posh"
-        if not ($oh_my_posh_cache | path exists) {
-          mkdir $oh_my_posh_cache
-        }
-        ${cfg.package}/bin/oh-my-posh init nu ${configArgument} --print | save --force ${config.xdg.cacheHome}/oh-my-posh/init.nu
-      '';
       extraConfig = ''
-        source ${config.xdg.cacheHome}/oh-my-posh/init.nu
+        source ${
+          pkgs.runCommand "oh-my-posh-nushell-config" { } ''
+            ${
+              lib.getExe cfg.package
+            } init nu ${configArgument} --print >> "$out"
+          ''
+        }
       '';
     };
   };

tests/modules/programs/oh-my-posh/nushell.nix

@@ -1,4 +1,4 @@
-{ pkgs, config, ... }:
+{ lib, pkgs, realPkgs, config, ... }:
 
 {
   programs = {
@@ -10,25 +10,17 @@
     };
   };
 
+  _module.args.pkgs = lib.mkForce realPkgs;
+
   nmt.script = let
     configFile = if pkgs.stdenv.isDarwin && !config.xdg.enable then
       "home-files/Library/Application Support/nushell/config.nu"
     else
       "home-files/.config/nushell/config.nu";
-
-    envFile = if pkgs.stdenv.isDarwin && !config.xdg.enable then
-      "home-files/Library/Application Support/nushell/env.nu"
-    else
-      "home-files/.config/nushell/env.nu";
   in ''
-    assertFileExists "${envFile}"
-    assertFileRegex \
-      "${envFile}" \
-      '/bin/oh-my-posh init nu --config .*--print \| save --force /.*/home-files/\.cache/oh-my-posh/init\.nu'
-
     assertFileExists "${configFile}"
     assertFileRegex \
       "${configFile}" \
-      'source /.*/\.cache/oh-my-posh/init\.nu'
+      'source /nix/store/[^/]*-oh-my-posh-nushell-config'
   '';
 }