From 1c2638b1c24c1260c8abc605e160a4a831f43163 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E3=81=AA=E3=81=A4=E3=81=8D?= <i@ntk.me>
Date: Fri, 25 Oct 2024 08:36:21 -0700
Subject: [PATCH 1/5] Implement `sass --embedded` in pure JS mode

---
 .github/workflows/ci.yml      | 12 +-----
 bin/sass.ts                   |  5 +++
 lib/src/compiler-module.ts    | 34 ++++++++++++++++
 lib/src/compiler-path.ts      | 76 ++++++++++++-----------------------
 package.json                  |  1 +
 tool/get-embedded-compiler.ts | 42 ++++++++++++++-----
 tool/init.ts                  | 10 +++--
 7 files changed, 106 insertions(+), 74 deletions(-)
 create mode 100644 lib/src/compiler-module.ts

diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index dd3614a3..c16c75c3 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -117,17 +117,7 @@ jobs:
         working-directory: sass-spec
 
       - name: Compile
-        run: |
-          npm run compile
-          if [[ "$RUNNER_OS" == "Windows" ]]; then
-            # Avoid copying the entire Dart Sass build directory on Windows,
-            # since it may contain symlinks that cp will choke on.
-            mkdir -p dist/lib/src/vendor/dart-sass/
-            cp {`pwd`/,dist/}lib/src/vendor/dart-sass/sass.bat
-            cp {`pwd`/,dist/}lib/src/vendor/dart-sass/sass.snapshot
-          else
-            ln -s {`pwd`/,dist/}lib/src/vendor/dart-sass
-          fi
+        run: npm run compile
 
       - name: Run tests
         run: npm run js-api-spec -- --sassPackage .. --sassSassRepo ../language
diff --git a/bin/sass.ts b/bin/sass.ts
index 80c60125..f057b5e1 100755
--- a/bin/sass.ts
+++ b/bin/sass.ts
@@ -1,6 +1,7 @@
 #!/usr/bin/env node
 
 import * as child_process from 'child_process';
+import * as path from 'path';
 import {compilerCommand} from '../lib/src/compiler-path';
 
 // TODO npm/cmd-shim#152 and yarnpkg/berry#6422 - If and when the package
@@ -12,6 +13,10 @@ try {
     compilerCommand[0],
     [...compilerCommand.slice(1), ...process.argv.slice(2)],
     {
+      // Node blocks launching .bat and .cmd without a shell due to CVE-2024-27980
+      shell: ['.bat', '.cmd'].includes(
+        path.extname(compilerCommand[0]).toLowerCase(),
+      ),
       stdio: 'inherit',
       windowsHide: true,
     },
diff --git a/lib/src/compiler-module.ts b/lib/src/compiler-module.ts
new file mode 100644
index 00000000..113170c7
--- /dev/null
+++ b/lib/src/compiler-module.ts
@@ -0,0 +1,34 @@
+// Copyright 2025 Google LLC. Use of this source code is governed by an
+// MIT-style license that can be found in the LICENSE file or at
+// https://opensource.org/licenses/MIT.
+
+import * as p from 'path';
+import {getElfInterpreter} from './elf';
+
+/**
+ * Detect if the given binary is linked with musl libc by checking if
+ * the interpreter basename starts with "ld-musl-"
+ */
+function isLinuxMusl(path: string): boolean {
+  try {
+    const interpreter = getElfInterpreter(path);
+    return p.basename(interpreter).startsWith('ld-musl-');
+  } catch (error) {
+    console.warn(
+      `Warning: Failed to detect linux-musl, fallback to linux-gnu: ${error.message}`,
+    );
+    return false;
+  }
+}
+
+/** The module name for the embedded compiler executable. */
+export const compilerModule = (() => {
+  const platform =
+    process.platform === 'linux' && isLinuxMusl(process.execPath)
+      ? 'linux-musl'
+      : (process.platform as string);
+
+  const arch = process.arch;
+
+  return `sass-embedded-${platform}-${arch}`;
+})();
diff --git a/lib/src/compiler-path.ts b/lib/src/compiler-path.ts
index b9344cf5..169c0c08 100644
--- a/lib/src/compiler-path.ts
+++ b/lib/src/compiler-path.ts
@@ -2,78 +2,52 @@
 // MIT-style license that can be found in the LICENSE file or at
 // https://opensource.org/licenses/MIT.
 
-import * as fs from 'fs';
 import * as p from 'path';
-import {getElfInterpreter} from './elf';
-import {isErrnoException} from './utils';
-
-/**
- * Detect if the given binary is linked with musl libc by checking if
- * the interpreter basename starts with "ld-musl-"
- */
-function isLinuxMusl(path: string): boolean {
-  try {
-    const interpreter = getElfInterpreter(path);
-    return p.basename(interpreter).startsWith('ld-musl-');
-  } catch (error) {
-    console.warn(
-      `Warning: Failed to detect linux-musl, fallback to linux-gnu: ${error.message}`,
-    );
-    return false;
-  }
-}
+import {compilerModule} from './compiler-module';
 
 /** The full command for the embedded compiler executable. */
 export const compilerCommand = (() => {
-  const platform =
-    process.platform === 'linux' && isLinuxMusl(process.execPath)
-      ? 'linux-musl'
-      : (process.platform as string);
-
-  const arch = process.arch;
-
-  // find for development
-  for (const path of ['vendor', '../../../lib/src/vendor']) {
-    const executable = p.resolve(
-      __dirname,
-      path,
-      `dart-sass/sass${platform === 'win32' ? '.bat' : ''}`,
-    );
-
-    if (fs.existsSync(executable)) return [executable];
-  }
-
   try {
     return [
       require.resolve(
-        `sass-embedded-${platform}-${arch}/dart-sass/src/dart` +
-          (platform === 'win32' ? '.exe' : ''),
-      ),
-      require.resolve(
-        `sass-embedded-${platform}-${arch}/dart-sass/src/sass.snapshot`,
+        `${compilerModule}/dart-sass/src/dart` +
+          (process.platform === 'win32' ? '.exe' : ''),
       ),
+      require.resolve(`${compilerModule}/dart-sass/src/sass.snapshot`),
     ];
-  } catch (ignored) {
-    // ignored
+  } catch (e) {
+    if (e.code !== 'MODULE_NOT_FOUND') {
+      throw e;
+    }
   }
 
   try {
     return [
       require.resolve(
-        `sass-embedded-${platform}-${arch}/dart-sass/sass` +
-          (platform === 'win32' ? '.bat' : ''),
+        `${compilerModule}/dart-sass/sass` +
+          (process.platform === 'win32' ? '.bat' : ''),
       ),
     ];
-  } catch (e: unknown) {
-    if (!(isErrnoException(e) && e.code === 'MODULE_NOT_FOUND')) {
+  } catch (e) {
+    if (e.code !== 'MODULE_NOT_FOUND') {
+      throw e;
+    }
+  }
+
+  try {
+    return [
+      process.execPath,
+      p.join(p.dirname(require.resolve('sass')), 'sass.js'),
+    ];
+  } catch (e) {
+    if (e.code !== 'MODULE_NOT_FOUND') {
       throw e;
     }
   }
 
   throw new Error(
     "Embedded Dart Sass couldn't find the embedded compiler executable. " +
-      'Please make sure the optional dependency ' +
-      `sass-embedded-${platform}-${arch} is installed in ` +
-      'node_modules.',
+      `Please make sure the optional dependency ${compilerModule} or sass is ` +
+      'installed in node_modules.',
   );
 })();
diff --git a/package.json b/package.json
index 6a8f0f0b..9373389b 100644
--- a/package.json
+++ b/package.json
@@ -38,6 +38,7 @@
     "test": "jest"
   },
   "optionalDependencies": {
+    "sass": "1.89.2",
     "sass-embedded-android-arm": "1.89.2",
     "sass-embedded-android-arm64": "1.89.2",
     "sass-embedded-android-riscv64": "1.89.2",
diff --git a/tool/get-embedded-compiler.ts b/tool/get-embedded-compiler.ts
index 828c22b8..85b44490 100644
--- a/tool/get-embedded-compiler.ts
+++ b/tool/get-embedded-compiler.ts
@@ -2,9 +2,11 @@
 // MIT-style license that can be found in the LICENSE file or at
 // https://opensource.org/licenses/MIT.
 
+import {promises as fs} from 'fs';
 import * as p from 'path';
 import * as shell from 'shelljs';
 
+import {compilerModule} from '../lib/src/compiler-module';
 import * as utils from './utils';
 
 /**
@@ -14,7 +16,7 @@ import * as utils from './utils';
  * at `path`. By default, checks out the latest revision from GitHub.
  */
 export async function getEmbeddedCompiler(
-  outPath: string,
+  js?: boolean,
   options?: {ref: string} | {path: string},
 ): Promise<void> {
   const repo = 'dart-sass';
@@ -41,21 +43,43 @@ export async function getEmbeddedCompiler(
     await utils.link(languageInHost, languageInCompiler);
   }
 
-  buildDartSassEmbedded(source);
-  await utils.link(p.join(source, 'build'), p.join(outPath, repo));
+  buildDartSassEmbedded(source, js ?? false);
+
+  const jsModulePath = p.resolve('node_modules/sass');
+  const dartModulePath = p.resolve(p.join('node_modules', compilerModule));
+  if (js) {
+    await fs.rm(dartModulePath, {force: true, recursive: true});
+    await utils.link(p.join(source, 'build/npm'), jsModulePath);
+  } else {
+    await fs.rm(jsModulePath, {force: true, recursive: true});
+    await utils.link(p.join(source, 'build'), p.join(dartModulePath, repo));
+  }
 }
 
 // Builds the Embedded Dart Sass executable from the source at `repoPath`.
-function buildDartSassEmbedded(repoPath: string): void {
+function buildDartSassEmbedded(repoPath: string, js: boolean): void {
   console.log("Downloading Dart Sass's dependencies.");
   shell.exec('dart pub upgrade', {
     cwd: repoPath,
     silent: true,
   });
 
-  console.log('Building the Dart Sass executable.');
-  shell.exec('dart run grinder protobuf pkg-standalone-dev', {
-    cwd: repoPath,
-    env: {...process.env, UPDATE_SASS_PROTOCOL: 'false'},
-  });
+  if (js) {
+    shell.exec('npm install', {
+      cwd: repoPath,
+      silent: true,
+    });
+
+    console.log('Building the Dart Sass npm package.');
+    shell.exec('dart run grinder protobuf pkg-npm-dev', {
+      cwd: repoPath,
+      env: {...process.env, UPDATE_SASS_PROTOCOL: 'false'},
+    });
+  } else {
+    console.log('Building the Dart Sass executable.');
+    shell.exec('dart run grinder protobuf pkg-standalone-dev', {
+      cwd: repoPath,
+      env: {...process.env, UPDATE_SASS_PROTOCOL: 'false'},
+    });
+  }
 }
diff --git a/tool/init.ts b/tool/init.ts
index 230cd09d..80f7b71d 100644
--- a/tool/init.ts
+++ b/tool/init.ts
@@ -18,6 +18,10 @@ const argv = yargs(process.argv.slice(2))
     type: 'string',
     description: 'Build the Embedded Dart Sass binary from this Git ref.',
   })
+  .option('compiler-js', {
+    type: 'boolean',
+    description: 'Build the Embedded Dart Sass with dart2js.',
+  })
   .option('skip-compiler', {
     type: 'boolean',
     description: "Don't Embedded Dart Sass at all.",
@@ -55,15 +59,15 @@ void (async () => {
 
     if (!argv['skip-compiler']) {
       if (argv['compiler-ref']) {
-        await getEmbeddedCompiler(outPath, {
+        await getEmbeddedCompiler(argv['compiler-js'], {
           ref: argv['compiler-ref'],
         });
       } else if (argv['compiler-path']) {
-        await getEmbeddedCompiler(outPath, {
+        await getEmbeddedCompiler(argv['compiler-js'], {
           path: argv['compiler-path'],
         });
       } else {
-        await getEmbeddedCompiler(outPath);
+        await getEmbeddedCompiler(argv['compiler-js']);
       }
     }
 

From 6dd70371bf2279a8c093ca9c1a3297b5fc826119 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E3=81=AA=E3=81=A4=E3=81=8D?= <i@ntk.me>
Date: Wed, 16 Jul 2025 15:38:22 -0700
Subject: [PATCH 2/5] Make `js` a key of `options`

---
 tool/get-embedded-compiler.ts | 23 +++++++++++++++++------
 tool/init.ts                  | 10 +++++++---
 2 files changed, 24 insertions(+), 9 deletions(-)

diff --git a/tool/get-embedded-compiler.ts b/tool/get-embedded-compiler.ts
index 85b44490..aac304ca 100644
--- a/tool/get-embedded-compiler.ts
+++ b/tool/get-embedded-compiler.ts
@@ -14,23 +14,33 @@ import * as utils from './utils';
  *
  * Can check out and build the source from a Git `ref` or build from the source
  * at `path`. By default, checks out the latest revision from GitHub.
+ *
+ * The embedded compiler will be built as dart snapshot by default, or pure node
+ * js if the `js` option is `true`.
  */
 export async function getEmbeddedCompiler(
-  js?: boolean,
-  options?: {ref: string} | {path: string},
+  options?:
+    | {
+        ref?: string;
+        js?: boolean;
+      }
+    | {
+        path: string;
+        js?: boolean;
+      },
 ): Promise<void> {
   const repo = 'dart-sass';
 
   let source: string;
-  if (!options || 'ref' in options) {
+  if (options !== undefined && 'path' in options) {
+    source = options.path;
+  } else {
     utils.fetchRepo({
       repo,
       outPath: 'build',
       ref: options?.ref ?? 'main',
     });
     source = p.join('build', repo);
-  } else {
-    source = options.path;
   }
 
   // Make sure the compiler sees the same version of the language repo that the
@@ -43,7 +53,8 @@ export async function getEmbeddedCompiler(
     await utils.link(languageInHost, languageInCompiler);
   }
 
-  buildDartSassEmbedded(source, js ?? false);
+  const js = options?.js ?? false;
+  buildDartSassEmbedded(source, js);
 
   const jsModulePath = p.resolve('node_modules/sass');
   const dartModulePath = p.resolve(p.join('node_modules', compilerModule));
diff --git a/tool/init.ts b/tool/init.ts
index 80f7b71d..ffed630a 100644
--- a/tool/init.ts
+++ b/tool/init.ts
@@ -59,15 +59,19 @@ void (async () => {
 
     if (!argv['skip-compiler']) {
       if (argv['compiler-ref']) {
-        await getEmbeddedCompiler(argv['compiler-js'], {
+        await getEmbeddedCompiler({
           ref: argv['compiler-ref'],
+          js: argv['compiler-js'],
         });
       } else if (argv['compiler-path']) {
-        await getEmbeddedCompiler(argv['compiler-js'], {
+        await getEmbeddedCompiler({
           path: argv['compiler-path'],
+          js: argv['compiler-js'],
         });
       } else {
-        await getEmbeddedCompiler(argv['compiler-js']);
+        await getEmbeddedCompiler({
+          js: argv['compiler-js'],
+        });
       }
     }
 

From 49a65725ec95e7ebb4b01a9a7580553b68923c36 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E3=81=AA=E3=81=A4=E3=81=8D?= <i@ntk.me>
Date: Fri, 18 Jul 2025 18:23:37 -0700
Subject: [PATCH 3/5] Add "binary" packages for unknown platforms

---
 npm/all-unknown/README.md        |  3 +++
 npm/all-unknown/package.json     | 17 +++++++++++++++++
 npm/unknown-all/README.md        |  3 +++
 npm/unknown-all/package.json     | 17 +++++++++++++++++
 package.json                     |  7 ++++---
 tool/prepare-optional-release.ts | 23 +++++++++++++++++++++++
 6 files changed, 67 insertions(+), 3 deletions(-)
 create mode 100644 npm/all-unknown/README.md
 create mode 100644 npm/all-unknown/package.json
 create mode 100644 npm/unknown-all/README.md
 create mode 100644 npm/unknown-all/package.json

diff --git a/npm/all-unknown/README.md b/npm/all-unknown/README.md
new file mode 100644
index 00000000..e9b7cf6f
--- /dev/null
+++ b/npm/all-unknown/README.md
@@ -0,0 +1,3 @@
+# `sass-embedded-all-unknown`
+
+This is the **all-unknown** binary for [`sass-embedded`](https://www.npmjs.com/package/sass-embedded)
diff --git a/npm/all-unknown/package.json b/npm/all-unknown/package.json
new file mode 100644
index 00000000..234bd6f6
--- /dev/null
+++ b/npm/all-unknown/package.json
@@ -0,0 +1,17 @@
+{
+  "name": "sass-embedded-all-unknown",
+  "version": "1.89.2",
+  "description": "The all-unknown binary for sass-embedded",
+  "repository": "sass/embedded-host-node",
+  "author": "Google Inc.",
+  "license": "MIT",
+  "cpu": [
+    "!arm",
+    "!arm64",
+    "!riscv64",
+    "!x64"
+  ],
+  "dependencies": {
+    "sass": "1.89.2"
+  }
+}
diff --git a/npm/unknown-all/README.md b/npm/unknown-all/README.md
new file mode 100644
index 00000000..14851af3
--- /dev/null
+++ b/npm/unknown-all/README.md
@@ -0,0 +1,3 @@
+# `sass-embedded-unknown-all`
+
+This is the **unknown-all** binary for [`sass-embedded`](https://www.npmjs.com/package/sass-embedded)
diff --git a/npm/unknown-all/package.json b/npm/unknown-all/package.json
new file mode 100644
index 00000000..92190b6d
--- /dev/null
+++ b/npm/unknown-all/package.json
@@ -0,0 +1,17 @@
+{
+  "name": "sass-embedded-unknown-all",
+  "version": "1.89.2",
+  "description": "The unknown-all binary for sass-embedded",
+  "repository": "sass/embedded-host-node",
+  "author": "Google Inc.",
+  "license": "MIT",
+  "os": [
+    "!android",
+    "!darwin",
+    "!linux",
+    "!win32"
+  ],
+  "dependencies": {
+    "sass": "1.89.2"
+  }
+}
diff --git a/package.json b/package.json
index 9373389b..b0488590 100644
--- a/package.json
+++ b/package.json
@@ -38,7 +38,7 @@
     "test": "jest"
   },
   "optionalDependencies": {
-    "sass": "1.89.2",
+    "sass-embedded-all-unknown": "1.89.2",
     "sass-embedded-android-arm": "1.89.2",
     "sass-embedded-android-arm64": "1.89.2",
     "sass-embedded-android-riscv64": "1.89.2",
@@ -47,12 +47,13 @@
     "sass-embedded-darwin-x64": "1.89.2",
     "sass-embedded-linux-arm": "1.89.2",
     "sass-embedded-linux-arm64": "1.89.2",
-    "sass-embedded-linux-riscv64": "1.89.2",
-    "sass-embedded-linux-x64": "1.89.2",
     "sass-embedded-linux-musl-arm": "1.89.2",
     "sass-embedded-linux-musl-arm64": "1.89.2",
     "sass-embedded-linux-musl-riscv64": "1.89.2",
     "sass-embedded-linux-musl-x64": "1.89.2",
+    "sass-embedded-linux-riscv64": "1.89.2",
+    "sass-embedded-linux-x64": "1.89.2",
+    "sass-embedded-unknown-all": "1.89.2",
     "sass-embedded-win32-arm64": "1.89.2",
     "sass-embedded-win32-x64": "1.89.2"
   },
diff --git a/tool/prepare-optional-release.ts b/tool/prepare-optional-release.ts
index d98529d6..bffdce45 100644
--- a/tool/prepare-optional-release.ts
+++ b/tool/prepare-optional-release.ts
@@ -119,6 +119,29 @@ void (async () => {
       );
     }
 
+    const optPkg = JSON.parse(
+      (
+        await fs.readFile(p.join('npm', argv.package, 'package.json'))
+      ).toString(),
+    ) as {['version']: string; ['dependencies']?: {['sass']?: string}};
+
+    if (optPkg.version !== pkg.version) {
+      throw Error(
+        "Optional package's version does not match main package's version",
+      );
+    }
+
+    const sassDependencyVersion = optPkg?.dependencies?.sass;
+    if (sassDependencyVersion !== undefined) {
+      if (sassDependencyVersion !== pkg.version) {
+        throw Error(
+          "Optional package's sass dependency version does not match main package's version",
+        );
+      }
+
+      return;
+    }
+
     const index = argv.package.lastIndexOf('-');
     const nodePlatform = argv.package.substring(0, index);
     const nodeArch = argv.package.substring(index + 1);

From 7da381c86aef975471d25b87b10703fe95f20109 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E3=81=AA=E3=81=A4=E3=81=8D?= <i@ntk.me>
Date: Fri, 18 Jul 2025 18:54:26 -0700
Subject: [PATCH 4/5] Update README.md

---
 npm/all-unknown/README.md    | 4 +++-
 npm/all-unknown/package.json | 2 +-
 npm/unknown-all/README.md    | 4 +++-
 npm/unknown-all/package.json | 2 +-
 4 files changed, 8 insertions(+), 4 deletions(-)

diff --git a/npm/all-unknown/README.md b/npm/all-unknown/README.md
index e9b7cf6f..5223ace6 100644
--- a/npm/all-unknown/README.md
+++ b/npm/all-unknown/README.md
@@ -1,3 +1,5 @@
 # `sass-embedded-all-unknown`
 
-This is the **all-unknown** binary for [`sass-embedded`](https://www.npmjs.com/package/sass-embedded)
+This is the pure js optional dependency for [`sass-embedded`](https://www.npmjs.com/package/sass-embedded)
+
+This package does not contain any dart binary. Instead, it installs the `sass` npm package as a transitive dependency on any CPU without native dart support.
diff --git a/npm/all-unknown/package.json b/npm/all-unknown/package.json
index 234bd6f6..0ee85b62 100644
--- a/npm/all-unknown/package.json
+++ b/npm/all-unknown/package.json
@@ -1,7 +1,7 @@
 {
   "name": "sass-embedded-all-unknown",
   "version": "1.89.2",
-  "description": "The all-unknown binary for sass-embedded",
+  "description": "The pure js optional dependency for sass-embedded",
   "repository": "sass/embedded-host-node",
   "author": "Google Inc.",
   "license": "MIT",
diff --git a/npm/unknown-all/README.md b/npm/unknown-all/README.md
index 14851af3..4f20cb4a 100644
--- a/npm/unknown-all/README.md
+++ b/npm/unknown-all/README.md
@@ -1,3 +1,5 @@
 # `sass-embedded-unknown-all`
 
-This is the **unknown-all** binary for [`sass-embedded`](https://www.npmjs.com/package/sass-embedded)
+This is the pure js optional dependency for [`sass-embedded`](https://www.npmjs.com/package/sass-embedded)
+
+This package does not contain any dart binary. Instead, it installs the `sass` npm package as a transitive dependency on any OS without native dart support.
diff --git a/npm/unknown-all/package.json b/npm/unknown-all/package.json
index 92190b6d..47a2f003 100644
--- a/npm/unknown-all/package.json
+++ b/npm/unknown-all/package.json
@@ -1,7 +1,7 @@
 {
   "name": "sass-embedded-unknown-all",
   "version": "1.89.2",
-  "description": "The unknown-all binary for sass-embedded",
+  "description": "The pure js optional dependency for sass-embedded",
   "repository": "sass/embedded-host-node",
   "author": "Google Inc.",
   "license": "MIT",

From a75b008344019d6b7ec06b0e7696c82f9d73123f Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E3=81=AA=E3=81=A4=E3=81=8D?= <i@ntk.me>
Date: Sat, 19 Jul 2025 01:29:20 -0700
Subject: [PATCH 5/5] Remove unnecessary null check

---
 tool/prepare-optional-release.ts | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tool/prepare-optional-release.ts b/tool/prepare-optional-release.ts
index bffdce45..9b7d695e 100644
--- a/tool/prepare-optional-release.ts
+++ b/tool/prepare-optional-release.ts
@@ -131,7 +131,7 @@ void (async () => {
       );
     }
 
-    const sassDependencyVersion = optPkg?.dependencies?.sass;
+    const sassDependencyVersion = optPkg.dependencies?.sass;
     if (sassDependencyVersion !== undefined) {
       if (sassDependencyVersion !== pkg.version) {
         throw Error(