zed-editor: add userThemes option

Adding support for custom local themes

modules/programs/zed-editor.nix

@@ -1,22 +1,25 @@
 { config, lib, pkgs, ... }:
-
 with lib;
-
 let
   cfg = config.programs.zed-editor;
   jsonFormat = pkgs.formats.json { };
 
   mergedSettings = cfg.userSettings
     // (lib.optionalAttrs (builtins.length cfg.extensions > 0) {
-      # this part by @cmacrae
+      # by @cmacrae
       auto_install_extensions = lib.genAttrs cfg.extensions (_: true);
     });
+
+  buildThemes = themes:
+    lib.listToAttrs (map (theme: {
+      name = "zed/themes/${theme.name}.json";
+      value = { source = jsonFormat.generate "zed-theme-${theme.name}" theme; };
+    }) themes);
 in {
   meta.maintainers = [ hm.maintainers.libewa ];
 
   options = {
-    # TODO: add vscode option parity (installing extensions, configuring
-    # keybinds with nix etc.)
+    # TODO: add vscode option parity (installing extensions, configuring, keybinds with nix etc.)
     programs.zed-editor = {
       enable = mkEnableOption
         "Zed, the high performance, multiplayer code editor from the creators of Atom and Tree-sitter";
@@ -61,7 +64,7 @@ in {
               bindings = {
                 ctrl-shift-t = "workspace::NewTerminal";
               };
-            };
+            }
           ]
         '';
         description = ''
@@ -69,6 +72,32 @@ in {
         '';
       };
 
+      userThemes = mkOption {
+        type = types.listOf jsonFormat.type;
+        default = [ ];
+        example = literalExpression ''
+          [
+            {
+              name = "example 1";
+              author = "user";
+              themes = [
+                {
+                  name = "example 1";
+                  appearance = "dark";
+                  style = {
+                    background = "#000000";
+                  };
+                }
+              ];
+            }
+          ];
+        '';
+        description = ''
+          Local themes written to {file}`$XDG_CONFIG_HOME/zed/themes`.
+          See <https://zed.dev/docs/extensions/themes> for more information.
+        '';
+      };
+
       extensions = mkOption {
         type = types.listOf types.str;
         default = [ ];
@@ -122,15 +151,19 @@ in {
         binaryName = "zed-remote-server-stable-${version}";
       in {
         ".zed_server/${binaryName}".source =
-          lib.getExe' remote_server binaryName;
+        lib.getExe' remote_server binaryName;
       });
 
-    xdg.configFile."zed/settings.json" = (mkIf (mergedSettings != { }) {
-      source = jsonFormat.generate "zed-user-settings" mergedSettings;
-    });
-
-    xdg.configFile."zed/keymap.json" = (mkIf (cfg.userKeymaps != { }) {
-      source = jsonFormat.generate "zed-user-keymaps" cfg.userKeymaps;
-    });
+    xdg.configFile = mkMerge [
+      {
+        "zed/settings.json" = mkIf (mergedSettings != { }) {
+          source = jsonFormat.generate "zed-user-settings" mergedSettings;
+        };
+        "zed/keymap.json" = mkIf (cfg.userKeymaps != { }) {
+          source = jsonFormat.generate "zed-user-keymaps" cfg.userKeymaps;
+        };
+      }
+      (lib.mkIf (cfg.userThemes != [ ]) (buildThemes cfg.userThemes))
+    ];
   };
 }

tests/modules/programs/zed-editor/default.nix

@@ -3,4 +3,5 @@
   zed-install-remote-server = ./install-remote-server.nix;
   zed-keymap = ./keymap.nix;
   zed-settings = ./settings.nix;
+  zed-themes = ./themes.nix;
 }

tests/modules/programs/zed-editor/settings.nix

@@ -1,7 +1,5 @@
-# Test custom keymap functionality
-{ config, ... }:
-
-{
+# Test custom settings functionality
+{ config, ... }: {
   programs.zed-editor = {
     enable = true;
     package = config.lib.test.mkStubPackage { };

tests/modules/programs/zed-editor/themes.nix

@@ -0,0 +1,71 @@
+# Test custom theme functionality
+{ config, ... }: {
+  programs.zed-editor = {
+    enable = true;
+    package = config.lib.test.mkStubPackage { };
+    userThemes = [{
+      name = "Test";
+      author = "user";
+      themes = [{
+        name = "Test Catppuccin";
+        appearance = "light";
+        style = {
+          editor = {
+            foreground = "#4c4f69";
+            background = "#eff1f5";
+            gutter.background = "#eff1f5";
+            subheader.background = "#e6e9ef";
+            active_line.background = "#4c4f690d";
+            highlighted_line.background = null;
+            line_number = "#8c8fa1";
+            active_line_number = "#8839ef";
+            invisible = "#7c7f9366";
+            wrap_guide = "#acb0be";
+          };
+        };
+      }];
+    }];
+  };
+
+  nmt.script = let
+    expectedContent = builtins.toFile "expected.json" ''
+      {
+        "author": "user",
+        "name": "test",
+        "themes": [
+          {
+            "appearance": "light",
+            "name": "Test Catppuccin",
+            "style": {
+              "editor": {
+                "active_line": {
+                  "background": "#4c4f690d"
+                },
+                "active_line_number": "#8839ef",
+                "background": "#eff1f5",
+                "foreground": "#4c4f69",
+                "gutter": {
+                  "background": "#eff1f5"
+                },
+                "highlighted_line": {
+                  "background": null
+                },
+                "invisible": "#7c7f9366",
+                "line_number": "#8c8fa1",
+                "subheader": {
+                  "background": "#e6e9ef"
+                },
+                "wrap_guide": "#acb0be"
+              }
+            }
+          }
+        ]
+      }
+    '';
+
+    testPath = ".config/zed/themes/test.json";
+  in ''
+    assertFileExists "home-files/${testPath}"
+    assertFileContent "home-files/${testPath}" "${expectedContent}"
+  '';
+}