From 136112f75801516471eaed96216c106137afafd4 Mon Sep 17 00:00:00 2001
From: Hiroki Osame <hiroki.osame@gmail.com>
Date: Thu, 1 Jul 2021 22:49:42 -0400
Subject: [PATCH 1/2] feat: add pathinfo

---
 src/index.js          | 10 ++++++++
 test/pathinfo.test.js | 58 +++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 68 insertions(+)
 create mode 100644 test/pathinfo.test.js

diff --git a/src/index.js b/src/index.js
index 284604c5..d5263559 100644
--- a/src/index.js
+++ b/src/index.js
@@ -984,10 +984,20 @@ class MiniCssExtractPlugin {
       compiler.webpack.sources;
     const source = new ConcatSource();
     const externalsSource = new ConcatSource();
+    const includePathinfo = compilation.outputOptions.pathinfo;
 
     for (const m of usedModules) {
       let content = m.content.toString();
 
+      if (includePathinfo) {
+        // From https://github.com/webpack/webpack/blob/29eff8a74ecc2f87517b627dee451c2af9ed3f3f/lib/ModuleInfoHeaderPlugin.js#L191-L194
+        const req = m.readableIdentifier(requestShortener);
+        const reqStr = req.replace(/\*\//g, "*_/");
+        const reqStrStar = "*".repeat(reqStr.length);
+        const headerStr = `/*!****${reqStrStar}****!*\\\n  !*** ${reqStr} ***!\n  \\****${reqStrStar}****/\n`;
+        content = headerStr + content;
+      }
+
       if (/^@import url/.test(content)) {
         // HACK for IE
         // http://stackoverflow.com/a/14676665/1458162
diff --git a/test/pathinfo.test.js b/test/pathinfo.test.js
new file mode 100644
index 00000000..6df6052d
--- /dev/null
+++ b/test/pathinfo.test.js
@@ -0,0 +1,58 @@
+/* eslint-env browser */
+import path from "path";
+
+import MiniCssExtractPlugin from "../src/cjs";
+
+import { compile, getCompiler } from "./helpers/index";
+
+describe("pathinfo option", () => {
+  it(`should insert pathinfo`, async () => {
+    const compiler = getCompiler(
+      "esm.js",
+      {},
+      {
+        mode: "none",
+        output: {
+          pathinfo: true,
+          path: path.resolve(__dirname, "../outputs"),
+        },
+        plugins: [
+          new MiniCssExtractPlugin({
+            filename: "[name].css",
+          }),
+        ],
+      }
+    );
+    const stats = await compile(compiler);
+    const fs = stats.compilation.compiler.outputFileSystem;
+    const extractedCss = fs
+      .readFileSync(path.resolve(__dirname, "../outputs/main.css"))
+      .toString();
+
+    expect(extractedCss).toMatch("./simple.css");
+  });
+  it(`should not insert pathinfo`, async () => {
+    const compiler = getCompiler(
+      "esm.js",
+      {},
+      {
+        mode: "none",
+        output: {
+          path: path.resolve(__dirname, "../outputs"),
+        },
+        plugins: [
+          new MiniCssExtractPlugin({
+            filename: "[name].css",
+          }),
+        ],
+      }
+    );
+    const stats = await compile(compiler);
+    const fs = stats.compilation.compiler.outputFileSystem;
+    const extractedCss = fs
+      .readFileSync(path.resolve(__dirname, "../outputs/main.css"))
+      .toString();
+
+    expect(extractedCss).not.toMatch("./simple.css");
+  });
+});

From eea829303d457b905b12d8f6c82726d7daeb45a2 Mon Sep 17 00:00:00 2001
From: Hiroki Osame <hiroki.osame@gmail.com>
Date: Thu, 1 Jul 2021 23:05:43 -0400
Subject: [PATCH 2/2] chore: remove browser eslint env from pathinfo test

---
 test/pathinfo.test.js | 1 -
 1 file changed, 1 deletion(-)

diff --git a/test/pathinfo.test.js b/test/pathinfo.test.js
index 6df6052d..07d9ac72 100644
--- a/test/pathinfo.test.js
+++ b/test/pathinfo.test.js
@@ -1,4 +1,3 @@
-/* eslint-env browser */
 import path from "path";
 
 import MiniCssExtractPlugin from "../src/cjs";