fix(node-resolve): Respect if other plugins resolve the resolution to a different id (#1181)

* fix(node-resolve): Respect if other plugins resolve the resolution to a different id

* chore(node-resolve): Install pnpm 6 instead of 7

Author: lukastaegert

.github/workflows/node-windows.yml

@@ -36,7 +36,7 @@ jobs:
           node-version: ${{ matrix.node }}
 
       - name: install pnpm
-        run: npm install pnpm -g
+        run: npm install pnpm@6 -g
 
       - name: pnpm install
         run: pnpm install --ignore-scripts

.github/workflows/release.yml

@@ -43,7 +43,7 @@ jobs:
 
       - name: Install pnpm
         run: |
-          npm install pnpm -g;
+          npm install pnpm@6 -g;
           echo node `pnpm -v`;
 
       - name: Set Git Config

.github/workflows/validate.yml

@@ -34,7 +34,7 @@ jobs:
         run: git branch -f master origin/master
 
       - name: Install pnpm
-        run: npm install pnpm -g
+        run: npm install pnpm@6 -g
 
       - name: Sanity Check
         run: |

packages/node-resolve/src/index.js

@@ -281,6 +281,11 @@ export function nodeResolve(opts = {}) {
           if (resolvedResolved.external) {
             return false;
           }
+          // Allow other plugins to take over resolution. Rollup core will not
+          // change the id if it corresponds to an existing file
+          if (resolvedResolved.id !== resolved.id) {
+            return resolvedResolved;
+          }
           // Pass on meta information added by other plugins
           return { ...resolved, meta: resolvedResolved.meta };
         }

packages/node-resolve/test/test.js

@@ -1,4 +1,4 @@
-import { join, resolve } from 'path';
+import { join, resolve, dirname } from 'path';
 
 import test from 'ava';
 import { rollup } from 'rollup';
@@ -581,3 +581,31 @@ test('passes on meta information from other plugins', async (t) => {
     ]
   });
 });
+
+test('allow other plugins to take over resolution', async (t) => {
+  await rollup({
+    input: 'entry/main.js',
+    onwarn: failOnWarn(t),
+    plugins: [
+      nodeResolve(),
+      {
+        name: 'change-resolution',
+        resolveId(importee) {
+          if (importee.endsWith('main.js')) {
+            return {
+              id: join(dirname(importee), 'other.js'),
+              meta: { 'change-resolution': 'changed' }
+            };
+          }
+          return null;
+        },
+
+        load(id) {
+          const info = this.getModuleInfo(id);
+          t.is(info.id, join(__dirname, 'fixtures', 'entry', 'other.js'));
+          t.deepEqual(info.meta, { 'change-resolution': 'changed' });
+        }
+      }
+    ]
+  });
+});