Build a theme variant called Omni (No italic) that removes italics

package.json

@@ -48,6 +48,11 @@
                 "label": "Omni",
                 "uiTheme": "vs-dark",
                 "path": "./theme/omni.json"
+            },
+            {
+                "label": "Omni (No italic)",
+                "uiTheme": "vs-dark",
+                "path": "./theme/omni-no-italic.json"
             }
         ]
     },

scripts/build.js

@@ -3,19 +3,66 @@ const path = require('path');
 const generate = require('./generate');
 
 const THEME_DIR = path.join(__dirname, '..', 'theme');
+const BASE_THEME_FILENAME = 'omni.json';
+const NO_ITALIC_THEME_FILENAME = 'omni-no-italic.json';
 
 if (!fs.existsSync(THEME_DIR)) {
     fs.mkdirSync(THEME_DIR);
 }
 
+const removeItalics = (theme) => {
+    const clone = JSON.parse(JSON.stringify(theme));
+
+    clone.name = 'Omni (No italic)';
+
+    const stripFontStyle = (settings) => {
+        if (!settings || typeof settings.fontStyle !== 'string') {
+            return;
+        }
+
+        const styles = settings.fontStyle
+            .split(/\s+/)
+            .map((style) => style.trim())
+            .filter((style) => style && style.toLowerCase() !== 'italic');
+
+        if (styles.length === 0) {
+            delete settings.fontStyle;
+        } else {
+            settings.fontStyle = styles.join(' ');
+        }
+    };
+
+    if (Array.isArray(clone.tokenColors)) {
+        clone.tokenColors.forEach((token) => stripFontStyle(token.settings));
+    }
+
+    if (
+        clone.semanticTokenColors &&
+        typeof clone.semanticTokenColors === 'object'
+    ) {
+        Object.values(clone.semanticTokenColors).forEach((tokenSetting) => {
+            if (tokenSetting && typeof tokenSetting === 'object') {
+                stripFontStyle(tokenSetting);
+            }
+        });
+    }
+
+    return clone;
+};
+
 module.exports = async () => {
     const { base } = await generate();
+    const noItalic = removeItalics(base);
 
     return Promise.all([
         fs.promises.writeFile(
-            path.join(THEME_DIR, 'omni.json'),
+            path.join(THEME_DIR, BASE_THEME_FILENAME),
             JSON.stringify(base, null, 4)
         ),
+        fs.promises.writeFile(
+            path.join(THEME_DIR, NO_ITALIC_THEME_FILENAME),
+            JSON.stringify(noItalic, null, 4)
+        ),
     ]);
 };