fix: return original source when no inline styles are found

dist/parser.js

@@ -9,6 +9,9 @@ const parse = (source, opts) => {
     const { from } = opts;
     logger_1.logger.info(`Parsing ${from}`);
     const document = (0, postcss_1.parse)("", { from });
+    // Store the original TypeScript source so the stringifier can return it
+    // unchanged when there are no inline styles to process.
+    document.raws.angularSource = sourceString;
     try {
         const allStyles = (0, get_component_metadata_1.getComponentStyles)(sourceString, from);
         logger_1.logger.info(`Located ${allStyles.length} inline styles.`);

dist/stringifier.js

@@ -6,7 +6,16 @@ const logger_1 = require("./logger");
 const stringify = (node, builder) => {
     logger_1.logger.info(`Stringify called.`);
     try {
-        node.root().nodes.forEach((node) => {
+        const root = node.root();
+        const nodes = root.nodes;
+        if (nodes.length === 0) {
+            // No inline styles — return the original TypeScript source unchanged
+            // to prevent stylelint's fix mode from writing an empty string back
+            // to disk.
+            builder(root.raws.angularSource ?? "");
+            return;
+        }
+        nodes.forEach((node) => {
             builder(node.raws.angularCodeBefore, node);
             (0, postcss_1.stringify)(node, builder);
             builder(node.raws.angularCodeAfter, node);

src/parser.ts

@@ -1,4 +1,4 @@
-import { ProcessOptions, Root, parse as postcssParse, Document } from "postcss";
+import { ProcessOptions, Root, parse as postcssParse } from "postcss";
 import { getComponentStyles } from "./get-component-metadata";
 import { logger } from "./logger";
 
@@ -10,6 +10,10 @@ export const parse = (source: string, opts: ProcessOptions): Root => {
 
   const document = postcssParse("", { from });
 
+  // Store the original TypeScript source so the stringifier can return it
+  // unchanged when there are no inline styles to process.
+  document.raws.angularSource = sourceString;
+
   try {
     const allStyles = getComponentStyles(sourceString, from);
 

src/stringifier.ts

@@ -5,7 +5,17 @@ export const stringify = (node: AnyNode, builder) => {
   logger.info(`Stringify called.`);
 
   try {
-    node.root().nodes.forEach((node) => {
+    const root = node.root();
+    const nodes = root.nodes;
+
+    if (nodes.length === 0) {
+      // No inline styles — return the original TypeScript source unchanged to
+      // prevent stylelint's fix mode from writing an empty string back to disk.
+      builder(root.raws.angularSource ?? "");
+      return;
+    }
+
+    nodes.forEach((node) => {
       builder(node.raws.angularCodeBefore, node);
       postcssStringify(node, builder);
       builder(node.raws.angularCodeAfter, node);