[Fix] named, namespace: properly set reexports on export * as … from

Fixes #1998. Fixes #2161.

Author: ljharb

CHANGELOG.md

@@ -8,6 +8,7 @@ This change log adheres to standards from [Keep a CHANGELOG](http://keepachangel
 
 ### Fixed
 - `ExportMap`: Add default export when esModuleInterop is true and anything is exported ([#2184], thanks [@Maxim-Mazurok])
+- [`named`], [`namespace`]: properly set reexports on `export * as … from` ([#1998], [#2161], thanks [@ljharb])
 
 ### Changed
 - [Docs] `max-dependencies`: 📖 Document `ignoreTypeImports` option ([#2196], thanks [@himynameisdave])
@@ -1145,10 +1146,12 @@ for info on changes for earlier releases.
 [#211]: https://github.com/import-js/eslint-plugin-import/pull/211
 [#164]: https://github.com/import-js/eslint-plugin-import/pull/164
 [#157]: https://github.com/import-js/eslint-plugin-import/pull/157
+[#2161]: https://github.com/import-js/eslint-plugin-import/issues/2161
 [#2118]: https://github.com/import-js/eslint-plugin-import/issues/2118
 [#2067]: https://github.com/import-js/eslint-plugin-import/issues/2067
 [#2056]: https://github.com/import-js/eslint-plugin-import/issues/2056
 [#2063]: https://github.com/import-js/eslint-plugin-import/issues/2063
+[#1998]: https://github.com/import-js/eslint-plugin-import/issues/1998
 [#1965]: https://github.com/import-js/eslint-plugin-import/issues/1965
 [#1924]: https://github.com/import-js/eslint-plugin-import/issues/1924
 [#1854]: https://github.com/import-js/eslint-plugin-import/issues/1854

src/ExportMap.js

@@ -414,6 +414,39 @@ ExportMap.parse = function (path, content, context) {
     return object;
   }
 
+  function processSpecifier(s, n, m) {
+    const nsource = n.source && n.source.value;
+    const exportMeta = {};
+    let local;
+
+    switch (s.type) {
+    case 'ExportDefaultSpecifier':
+      if (!n.source) return;
+      local = 'default';
+      break;
+    case 'ExportNamespaceSpecifier':
+      m.namespace.set(s.exported.name, Object.defineProperty(exportMeta, 'namespace', {
+        get() { return resolveImport(nsource); },
+      }));
+      return;
+    case 'ExportAllDeclaration':
+      local = s.exported ? s.exported.name : s.local.name;
+      break;
+    case 'ExportSpecifier':
+      if (!n.source) {
+        m.namespace.set(s.exported.name, addNamespace(exportMeta, s.local));
+        return;
+      }
+      // else falls through
+    default:
+      local = s.local.name;
+      break;
+    }
+
+    // todo: JSDoc
+    m.reexports.set(s.exported.name, { local, getImport: () => resolveImport(nsource) });
+  }
+
   function captureDependency({ source }, isOnlyImportingTypes, importedSpecifiers = new Set()) {
     if (source == null) return null;
 
@@ -489,6 +522,9 @@ ExportMap.parse = function (path, content, context) {
     if (n.type === 'ExportAllDeclaration') {
       const getter = captureDependency(n, n.exportKind === 'type');
       if (getter) m.dependencies.add(getter);
+      if (n.exported) {
+        processSpecifier(n, n.exported, m);
+      }
       return;
     }
 
@@ -546,35 +582,7 @@ ExportMap.parse = function (path, content, context) {
         }
       }
 
-      const nsource = n.source && n.source.value;
-      n.specifiers.forEach((s) => {
-        const exportMeta = {};
-        let local;
-
-        switch (s.type) {
-        case 'ExportDefaultSpecifier':
-          if (!n.source) return;
-          local = 'default';
-          break;
-        case 'ExportNamespaceSpecifier':
-          m.namespace.set(s.exported.name, Object.defineProperty(exportMeta, 'namespace', {
-            get() { return resolveImport(nsource); },
-          }));
-          return;
-        case 'ExportSpecifier':
-          if (!n.source) {
-            m.namespace.set(s.exported.name, addNamespace(exportMeta, s.local));
-            return;
-          }
-          // else falls through
-        default:
-          local = s.local.name;
-          break;
-        }
-
-        // todo: JSDoc
-        m.reexports.set(s.exported.name, { local, getImport: () => resolveImport(nsource) });
-      });
+      n.specifiers.forEach((s) => processSpecifier(s, n, m));
     }
 
     const exports = ['TSExportAssignment'];

src/rules/namespace.js

@@ -60,7 +60,7 @@ module.exports = {
               if (!imports.size) {
                 context.report(
                   specifier,
-                  `No exported names found in module '${declaration.source.value}'.`
+                  `No exported names found in module '${declaration.source.value}'.`,
                 );
               }
               namespaces.set(specifier.local.name, imports);
@@ -69,7 +69,7 @@ module.exports = {
             case 'ImportSpecifier': {
               const meta = imports.get(
                 // default to 'default' for default http://i.imgur.com/nj6qAWy.jpg
-                specifier.imported ? specifier.imported.name : 'default'
+                specifier.imported ? specifier.imported.name : 'default',
               );
               if (!meta || !meta.namespace) { break; }
               namespaces.set(specifier.local.name, meta.namespace);
@@ -96,7 +96,7 @@ module.exports = {
         if (!imports.size) {
           context.report(
             namespace,
-            `No exported names found in module '${declaration.source.value}'.`
+            `No exported names found in module '${declaration.source.value}'.`,
           );
         }
       },
@@ -111,7 +111,7 @@ module.exports = {
         if (dereference.parent.type === 'AssignmentExpression' && dereference.parent.left === dereference) {
           context.report(
             dereference.parent,
-            `Assignment to member of namespace '${dereference.object.name}'.`
+            `Assignment to member of namespace '${dereference.object.name}'.`,
           );
         }
 
@@ -125,7 +125,7 @@ module.exports = {
             if (!allowComputed) {
               context.report(
                 dereference.property,
-                `Unable to validate computed reference to imported namespace '${dereference.object.name}'.`
+                `Unable to validate computed reference to imported namespace '${dereference.object.name}'.`,
               );
             }
             return;
@@ -134,7 +134,7 @@ module.exports = {
           if (!namespace.has(dereference.property.name)) {
             context.report(
               dereference.property,
-              makeMessage(dereference.property, namepath)
+              makeMessage(dereference.property, namepath),
             );
             break;
           }

tests/files/export-star-2/middle.js

@@ -0,0 +1 @@
+export * as myName from './upstream';

tests/files/export-star-2/upstream.js

@@ -0,0 +1 @@
+export const a = 1;

tests/files/export-star/extfield.js

@@ -0,0 +1 @@
+export default 42;

tests/files/export-star/extfield2.js

@@ -0,0 +1 @@
+export default NaN;

tests/files/export-star/models.js

@@ -0,0 +1,2 @@
+export * as ExtfieldModel from './extfield';
+export * as Extfield2Model from './extfield2';

tests/src/rules/named.js

@@ -1,4 +1,4 @@
-import { test, SYNTAX_CASES, getTSParsers } from '../utils';
+import { test, SYNTAX_CASES, getTSParsers, testFilePath, testVersion } from '../utils';
 import { RuleTester } from 'eslint';
 
 import { CASE_SENSITIVE_FS } from 'eslint-module-utils/resolve';
@@ -182,10 +182,18 @@ ruleTester.run('named', rule, {
     }),
 
     ...SYNTAX_CASES,
+
+    ...[].concat(testVersion('>= 6', () => ({
+      code: `import { ExtfieldModel, Extfield2Model } from './models';`,
+      filename: testFilePath('./export-star/downstream.js'),
+      parserOptions: {
+        sourceType: 'module',
+        ecmaVersion: 2020,
+      },
+    })) || []),
   ],
 
   invalid: [
-
     test({ code: 'import { somethingElse } from "./test-module"',
       errors: [ error('somethingElse', './test-module') ] }),
 

tests/src/rules/namespace.js

@@ -1,4 +1,4 @@
-import { test, SYNTAX_CASES, getTSParsers } from '../utils';
+import { test, SYNTAX_CASES, getTSParsers, testVersion, testFilePath } from '../utils';
 import { RuleTester } from 'eslint';
 import flatMap from 'array.prototype.flatmap';
 
@@ -172,6 +172,18 @@ const valid = [
     export const getExampleColor = () => color.example
     `,
   }),
+
+  ...[].concat(testVersion('>= 6', () => ({
+    code: `
+      import * as middle from './middle';
+
+      console.log(middle.myName);
+    `,
+    filename: testFilePath('export-star-2/downstream.js'),
+    parserOptions: {
+      ecmaVersion: 2020,
+    },
+  })) || []),
 ];
 
 const invalid = [