[Fix] no-extraneous-dependencies: add ESM intermediate package.json…

… support

Fixes #2120.

CHANGELOG.md

@@ -9,6 +9,7 @@ This change log adheres to standards from [Keep a CHANGELOG](http://keepachangel
 ### Fixed
 - [`no-duplicates`]: ensure autofix avoids excessive newlines ([#2028], thanks [@ertrzyiks])
 - [`extensions`]: avoid crashing on partially typed import/export statements ([#2118], thanks [@ljharb])
+- [`no-extraneous-dependencies`]: add ESM intermediate package.json support] ([#2121], thanks [@paztis])
 
 ## [2.23.4] - 2021-05-29
 
@@ -804,6 +805,7 @@ for info on changes for earlier releases.
 
 [`memo-parser`]: ./memo-parser/README.md
 
+[#2121]: https://github.com/benmosher/eslint-plugin-import/pull/2121
 [#2099]: https://github.com/benmosher/eslint-plugin-import/pull/2099
 [#2097]: https://github.com/benmosher/eslint-plugin-import/pull/2097
 [#2090]: https://github.com/benmosher/eslint-plugin-import/pull/2090

src/core/packagePath.js

@@ -13,6 +13,10 @@ export function getFilePackagePath(filePath) {
 }
 
 export function getFilePackageName(filePath) {
-  const { pkg } = readPkgUp.sync({ cwd: filePath, normalize: false });
-  return pkg && pkg.name;
+  const { pkg, path } = readPkgUp.sync({ cwd: filePath, normalize: false });
+  if (pkg) {
+    // recursion in case of intermediate esm package.json without name found
+    return pkg.name || getFilePackageName(dirname(dirname(path)));
+  }
+  return null;
 }

src/rules/no-extraneous-dependencies.js

@@ -126,11 +126,19 @@ function getModuleRealName(resolved) {
   return getFilePackageName(resolved);
 }
 
-function checkDependencyDeclaration(deps, packageName) {
+function checkDependencyDeclaration(deps, packageName, declarationStatus) {
+  const newDeclarationStatus = declarationStatus || {
+    isInDeps: false,
+    isInDevDeps: false,
+    isInOptDeps: false,
+    isInPeerDeps: false,
+    isInBundledDeps: false,
+  };
+
   // in case of sub package.json inside a module
   // check the dependencies on all hierarchy
   const packageHierarchy = [];
-  const packageNameParts = packageName.split('/');
+  const packageNameParts = packageName ? packageName.split('/') : [];
   packageNameParts.forEach((namePart, index) => {
     if (!namePart.startsWith('@')) {
       const ancestor = packageNameParts.slice(0, index + 1).join('/');
@@ -147,18 +155,16 @@ function checkDependencyDeclaration(deps, packageName) {
       isInBundledDeps:
         result.isInBundledDeps || deps.bundledDependencies.indexOf(ancestorName) !== -1,
     };
-  }, {
-    isInDeps: false,
-    isInDevDeps: false,
-    isInOptDeps: false,
-    isInPeerDeps: false,
-    isInBundledDeps: false,
-  });
+  }, newDeclarationStatus);
 }
 
 function reportIfMissing(context, deps, depsOptions, node, name) {
   // Do not report when importing types
-  if (node.importKind === 'type' || (node.parent && node.parent.importKind === 'type') || node.importKind === 'typeof') {
+  if (
+    node.importKind === 'type' ||
+    (node.parent && node.parent.importKind === 'type') ||
+    node.importKind === 'typeof'
+  ) {
     return;
   }
 
@@ -170,48 +176,46 @@ function reportIfMissing(context, deps, depsOptions, node, name) {
   if (!resolved) { return; }
 
   const importPackageName = getModuleOriginalName(name);
-  const importPackageNameDeclaration = checkDependencyDeclaration(deps, importPackageName);
-
-  if (importPackageNameDeclaration.isInDeps ||
-    (depsOptions.allowDevDeps && importPackageNameDeclaration.isInDevDeps) ||
-    (depsOptions.allowPeerDeps && importPackageNameDeclaration.isInPeerDeps) ||
-    (depsOptions.allowOptDeps && importPackageNameDeclaration.isInOptDeps) ||
-    (depsOptions.allowBundledDeps && importPackageNameDeclaration.isInBundledDeps)
+  let declarationStatus = checkDependencyDeclaration(deps, importPackageName);
+
+  if (
+    declarationStatus.isInDeps ||
+    (depsOptions.allowDevDeps && declarationStatus.isInDevDeps) ||
+    (depsOptions.allowPeerDeps && declarationStatus.isInPeerDeps) ||
+    (depsOptions.allowOptDeps && declarationStatus.isInOptDeps) ||
+    (depsOptions.allowBundledDeps && declarationStatus.isInBundledDeps)
   ) {
     return;
   }
 
   // test the real name from the resolved package.json
-  // if not aliased imports (alias/react for example), importPackageName can be  misinterpreted
+  // if not aliased imports (alias/react for example), importPackageName can be misinterpreted
   const realPackageName = getModuleRealName(resolved);
-  const realPackageNameDeclaration = checkDependencyDeclaration(deps, realPackageName);
-
-  if (realPackageNameDeclaration.isInDeps ||
-    (depsOptions.allowDevDeps && realPackageNameDeclaration.isInDevDeps) ||
-    (depsOptions.allowPeerDeps && realPackageNameDeclaration.isInPeerDeps) ||
-    (depsOptions.allowOptDeps && realPackageNameDeclaration.isInOptDeps) ||
-    (depsOptions.allowBundledDeps && realPackageNameDeclaration.isInBundledDeps)
-  ) {
-    return;
+  if (realPackageName && realPackageName !== importPackageName) {
+    declarationStatus = checkDependencyDeclaration(deps, realPackageName, declarationStatus);
+
+    if (
+      declarationStatus.isInDeps ||
+      (depsOptions.allowDevDeps && declarationStatus.isInDevDeps) ||
+      (depsOptions.allowPeerDeps && declarationStatus.isInPeerDeps) ||
+      (depsOptions.allowOptDeps && declarationStatus.isInOptDeps) ||
+      (depsOptions.allowBundledDeps && declarationStatus.isInBundledDeps)
+    ) {
+      return;
+    }
   }
 
-  if ((
-    importPackageNameDeclaration.isInDevDeps ||
-    realPackageNameDeclaration.isInDevDeps
-  ) && !depsOptions.allowDevDeps) {
-    context.report(node, devDepErrorMessage(realPackageName));
+  if (declarationStatus.isInDevDeps && !depsOptions.allowDevDeps) {
+    context.report(node, devDepErrorMessage(realPackageName || importPackageName));
     return;
   }
 
-  if ((
-    importPackageNameDeclaration.isInOptDeps ||
-    realPackageNameDeclaration.isInOptDeps
-  ) && !depsOptions.allowOptDeps) {
-    context.report(node, optDepErrorMessage(realPackageName));
+  if (declarationStatus.isInOptDeps && !depsOptions.allowOptDeps) {
+    context.report(node, optDepErrorMessage(realPackageName || importPackageName));
     return;
   }
 
-  context.report(node, missingErrorMessage(realPackageName));
+  context.report(node, missingErrorMessage(realPackageName || importPackageName));
 }
 
 function testConfig(config, filename) {

tests/files/package.json

@@ -9,6 +9,7 @@
   },
   "dependencies": {
     "@org/package": "^1.0.0",
+    "esm-package": "^1.0.0",
     "jquery": "^3.1.0",
     "lodash.cond": "^4.3.0",
     "pkg-up": "^1.0.0",

tests/files/webpack.config.js

@@ -3,7 +3,8 @@ module.exports = {
     extensions: ['', '.js', '.jsx'],
     root: __dirname,
     alias: {
-      'alias/chai$': 'chai' // alias for no-extraneous-dependencies tests
+      'alias/chai$': 'chai', // alias for no-extraneous-dependencies tests
+      'alias/esm-package': 'esm-package' // alias for no-extraneous-dependencies tests
     }
   },
 }

tests/src/rules/no-extraneous-dependencies.js

@@ -154,6 +154,15 @@ ruleTester.run('no-extraneous-dependencies', rule, {
     test({
       code: 'import "rxjs/operators"',
     }),
+
+    test({
+      code: 'import "esm-package/esm-module";',
+    }),
+
+    test({
+      code: 'import "alias/esm-package/esm-module";',
+      settings: { 'import/resolver': 'webpack' },
+    }),
   ],
   invalid: [
     test({
@@ -358,6 +367,13 @@ ruleTester.run('no-extraneous-dependencies', rule, {
         message: `'not-a-dependency' should be listed in the project's dependencies. Run 'npm i -S not-a-dependency' to add it`,
       }],
     }),
+
+    test({
+      code: 'import "esm-package-not-in-pkg-json/esm-module";',
+      errors: [{
+        message: `'esm-package-not-in-pkg-json' should be listed in the project's dependencies. Run 'npm i -S esm-package-not-in-pkg-json' to add it`,
+      }],
+    }),
   ],
 });