fix(pack): inherit source map options for inline CSS injectors

crates/pack-core/src/shared/transforms/inline_css/module.rs

@@ -311,6 +311,9 @@ impl InlineCssModuleType {
                 follow_reexports: module_options_context.follow_reexports,
                 module_fragments_enabled: module_options_context.module_fragments_enabled,
                 mangle_export_names: module_options_context.ecmascript.mangle_export_names,
+                source_map_generation_options: module_options_context
+                    .ecmascript
+                    .source_map_generation_options,
                 ..Default::default()
             }
             .resolved_cell(),

crates/pack-tests/tests/snapshot/library/inline_css_minified_no_maps/assert.js

@@ -0,0 +1,50 @@
+const assert = require("node:assert/strict");
+const fs = require("node:fs");
+const path = require("node:path");
+const vm = require("node:vm");
+
+const outputDir = path.join(__dirname, "output");
+assert.deepEqual(
+  fs.readdirSync(outputDir),
+  ["main.min.js"],
+  "minified inline CSS must emit its JavaScript bundle without CSS or map files",
+);
+
+const injectedStyles = [];
+const document = {
+  querySelector(selector) {
+    assert.equal(selector, "head");
+    return {
+      appendChild(style) {
+        injectedStyles.push(style);
+      },
+    };
+  },
+  createElement(tagName) {
+    assert.equal(tagName, "style");
+    return {
+      textContent: "",
+      appendChild(node) {
+        this.textContent += node.textContent;
+      },
+      removeAttribute(name) {
+        assert.equal(name, "media");
+      },
+    };
+  },
+  createTextNode(textContent) {
+    return { textContent };
+  },
+};
+
+const filename = path.join(outputDir, "main.min.js");
+const bundle = fs.readFileSync(filename, "utf8");
+const sandbox = { URL, window: {}, document };
+vm.runInNewContext(bundle, sandbox, { filename, timeout: 2000 });
+
+assert.equal(sandbox.InlineCssMinifiedLibrary.getValue(), 42);
+assert.equal(injectedStyles.length, 1, "the stylesheet must auto-inject");
+assert.match(
+  injectedStyles[0].textContent,
+  /\.minified-inline-css\s*\{\s*color:\s*red/,
+);

crates/pack-tests/tests/snapshot/library/inline_css_minified_no_maps/config.json

@@ -0,0 +1,25 @@
+{
+  "runtimeType": "Production",
+  "config": {
+    "entry": [
+      {
+        "import": "input/index.js",
+        "name": "main",
+        "library": {
+          "name": "InlineCssMinifiedLibrary"
+        }
+      }
+    ],
+    "optimization": {
+      "minify": true,
+      "moduleIds": "named"
+    },
+    "output": {
+      "filename": "main.min.js"
+    },
+    "sourceMaps": false,
+    "styles": {
+      "inlineCss": {}
+    }
+  }
+}

crates/pack-tests/tests/snapshot/library/inline_css_minified_no_maps/input/index.js

@@ -0,0 +1,5 @@
+import "./style.css";
+
+export function getValue() {
+  return 42;
+}

crates/pack-tests/tests/snapshot/library/inline_css_minified_no_maps/input/style.css

@@ -0,0 +1,3 @@
+.minified-inline-css {
+  color: red;
+}