From 9d71ae07802c1ebb14ffbf0f9861443e52cd856e Mon Sep 17 00:00:00 2001
From: lepzulnag <gindre.matthieu@gmail.com>
Date: Fri, 6 May 2022 11:03:08 +0200
Subject: [PATCH 1/2] fix: stylus relative sourcemap sources

---
 src/transformers/stylus.ts | 10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

diff --git a/src/transformers/stylus.ts b/src/transformers/stylus.ts
index 4807dca0..b2c2b2f5 100644
--- a/src/transformers/stylus.ts
+++ b/src/transformers/stylus.ts
@@ -4,8 +4,13 @@ import stylus from 'stylus';
 
 import { getIncludePaths } from '../modules/utils';
 
+import type { SourceMap } from 'magic-string';
 import type { Transformer, Options } from '../types';
 
+type StylusRendererWithSourceMap = ReturnType<typeof stylus> & {
+  sourcemap: SourceMap;
+};
+
 const transformer: Transformer<Options.Stylus> = ({
   content,
   filename,
@@ -20,15 +25,16 @@ const transformer: Transformer<Options.Stylus> = ({
     const style = stylus(content, {
       filename,
       ...options,
-    }).set('sourcemap', options.sourcemap);
+    }).set('sourcemap', options.sourcemap) as StylusRendererWithSourceMap;
 
     style.render((err, css) => {
       // istanbul ignore next
       if (err) reject(err);
+      const map = style.sourcemap.sources.map((source) => path.resolve(source));
 
       resolve({
         code: css,
-        map: (style as any).sourcemap,
+        map,
         // .map() necessary for windows compatibility
         dependencies: style
           .deps(filename as string)

From b7307ed528b040f57b3aa381148062b58004dd1a Mon Sep 17 00:00:00 2001
From: lepzulnag <gindre.matthieu@gmail.com>
Date: Fri, 6 May 2022 11:46:23 +0200
Subject: [PATCH 2/2] fix: handle no sourcemap case

---
 src/transformers/stylus.ts | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/src/transformers/stylus.ts b/src/transformers/stylus.ts
index b2c2b2f5..e7678d4d 100644
--- a/src/transformers/stylus.ts
+++ b/src/transformers/stylus.ts
@@ -30,11 +30,15 @@ const transformer: Transformer<Options.Stylus> = ({
     style.render((err, css) => {
       // istanbul ignore next
       if (err) reject(err);
-      const map = style.sourcemap.sources.map((source) => path.resolve(source));
+      if (style.sourcemap?.sources) {
+        style.sourcemap.sources = style.sourcemap.sources.map((source) =>
+          path.resolve(source),
+        );
+      }
 
       resolve({
         code: css,
-        map,
+        map: style.sourcemap,
         // .map() necessary for windows compatibility
         dependencies: style
           .deps(filename as string)