fix: load symlinked custom themes

packages/web/server/lib/opencode/theme-runtime.js

@@ -116,7 +116,7 @@ export const createThemeRuntime = (dependencies) => {
       const seen = new Set();
 
       for (const entry of entries) {
-        if (!entry.isFile()) continue;
+        if (!entry.isFile() && !entry.isSymbolicLink()) continue;
         if (!entry.name.toLowerCase().endsWith('.json')) continue;
 
         const filePath = path.join(themesDir, entry.name);

packages/web/server/lib/opencode/theme-runtime.test.js

@@ -0,0 +1,129 @@
+import { describe, expect, it } from 'vitest';
+
+import { createThemeRuntime } from './theme-runtime.js';
+
+const validTheme = (id = 'custom-theme') => ({
+  metadata: {
+    id,
+    name: 'Custom Theme',
+    variant: 'dark',
+  },
+  colors: {
+    primary: {
+      base: '#ffffff',
+      foreground: '#000000',
+    },
+    surface: {
+      background: '#000000',
+      foreground: '#ffffff',
+      muted: '#111111',
+      mutedForeground: '#eeeeee',
+      elevated: '#222222',
+      elevatedForeground: '#dddddd',
+      subtle: '#333333',
+    },
+    interactive: {
+      border: '#444444',
+      selection: '#555555',
+      selectionForeground: '#ffffff',
+      focusRing: '#666666',
+      hover: '#777777',
+    },
+    status: {
+      error: '#ff0000',
+      errorForeground: '#ffffff',
+      errorBackground: '#330000',
+      errorBorder: '#660000',
+      warning: '#ffaa00',
+      warningForeground: '#000000',
+      warningBackground: '#332200',
+      warningBorder: '#664400',
+      success: '#00ff00',
+      successForeground: '#000000',
+      successBackground: '#003300',
+      successBorder: '#006600',
+      info: '#0000ff',
+      infoForeground: '#ffffff',
+      infoBackground: '#000033',
+      infoBorder: '#000066',
+    },
+    syntax: {
+      base: {
+        background: '#000000',
+        foreground: '#ffffff',
+        keyword: '#ff00ff',
+        string: '#00ff00',
+        number: '#ffaa00',
+        function: '#00ffff',
+        variable: '#ffffff',
+        type: '#ffff00',
+        comment: '#888888',
+        operator: '#ffffff',
+      },
+      highlights: {
+        diffAdded: '#003300',
+        diffRemoved: '#330000',
+        lineNumber: '#888888',
+      },
+    },
+  },
+});
+
+const fileEntry = (name, type = 'file') => ({
+  name,
+  isFile: () => type === 'file',
+  isDirectory: () => type === 'directory',
+  isSymbolicLink: () => type === 'symlink',
+});
+
+const createTestRuntime = ({ entries, files, stats }) => createThemeRuntime({
+  fsPromises: {
+    readdir: async () => entries,
+    stat: async (filePath) => stats[filePath],
+    readFile: async (filePath) => files[filePath],
+  },
+  path: { join: (...parts) => parts.join('/') },
+  themesDir: '/themes',
+  maxThemeJsonBytes: 512 * 1024,
+  logger: { warn: () => {} },
+});
+
+describe('theme runtime', () => {
+  describe('readCustomThemesFromDisk', () => {
+    it('loads valid theme files', async () => {
+      const runtime = createTestRuntime({
+        entries: [fileEntry('direct.json')],
+        files: { '/themes/direct.json': JSON.stringify(validTheme('direct-theme')) },
+        stats: { '/themes/direct.json': { isFile: () => true, size: 1024 } },
+      });
+
+      const themes = await runtime.readCustomThemesFromDisk();
+
+      expect(themes.map((theme) => theme.metadata.id)).toEqual(['direct-theme']);
+    });
+
+    it('loads JSON themes whose directory entry is a symbolic link', async () => {
+      const runtime = createTestRuntime({
+        entries: [fileEntry('linked.json', 'symlink')],
+        files: { '/themes/linked.json': JSON.stringify(validTheme('linked-theme')) },
+        stats: { '/themes/linked.json': { isFile: () => true, size: 1024 } },
+      });
+
+      const themes = await runtime.readCustomThemesFromDisk();
+
+      expect(themes.map((theme) => theme.metadata.id)).toEqual(['linked-theme']);
+    });
+
+    it('skips JSON directories after stat resolution', async () => {
+      const runtime = createTestRuntime({
+        entries: [fileEntry('directory.json', 'directory')],
+        files: { '/themes/directory.json': JSON.stringify(validTheme('directory-theme')) },
+        stats: { '/themes/directory.json': { isFile: () => false, size: 1024 } },
+      });
+
+      const themes = await runtime.readCustomThemesFromDisk();
+
+      expect(themes).toEqual([]);
+    });
+  });
+});