Fix bit import when one module resolution alias is a directory of another alias

CHANGELOG.md

@@ -7,6 +7,7 @@ and this project adheres to [Semantic Versioning](http://semver.org/).
 
 ## [unreleased]
 
+- [#2013](https://github.com/teambit/bit/issues/2013) fix bit import when one module resolution alias is a directory of another alias
 - [#2004](https://github.com/teambit/bit/issues/2004) ask for approval before exporting a component to another scope (fork)
 - [#1956](https://github.com/teambit/bit/issues/1956) introduce a new flag `--codemod` for `bit export` to replace the import/require statements in the source to the newly exported scope
 - fix "Converting circular structure to JSON" error when logging a circular metadata object

e2e/functionalities/custom-module-resolutions.e2e.2.js

@@ -278,6 +278,98 @@ describe('custom module resolutions', function () {
         });
       });
     });
+    // see https://github.com/teambit/bit/issues/2006 for a bug about it.
+    describe('when one alias is a parent of another one', () => {
+      before(() => {
+        helper.scopeHelper.setNewLocalAndRemoteScopes();
+        const bitJson = helper.bitJson.read();
+        bitJson.resolveModules = { aliases: { '@': 'src' } };
+        helper.bitJson.write(bitJson);
+
+        helper.fs.createFile('src/utils', 'is-type.js', fixtures.isType);
+        const isStringFixture =
+          "const isType = require('@/utils/is-type');\n module.exports = function isString() { return isType() +  ' and got is-string'; };";
+        const barFooFixture =
+          "const isString = require('@/utils');\n module.exports = function foo() { return isString() + ' and got foo'; };";
+        const indexFixture = "module.exports = require('./is-string');";
+        helper.fs.createFile('src/utils', 'is-string.js', isStringFixture);
+        helper.fs.createFile('src/utils', 'index.js', indexFixture);
+        helper.fs.createFile('src/bar', 'foo.js', barFooFixture);
+        helper.command.addComponent('src', { i: 'bar/foo', m: 'src/bar/foo.js' });
+        helper.command.tagAllComponents();
+      });
+      it('bit status should not warn about missing packages', () => {
+        const output = helper.command.runCmd('bit status');
+        expect(output).to.not.have.string('missing');
+      });
+      it('should show the customResolvedPaths correctly', () => {
+        const barFoo = helper.command.catComponent('bar/foo@latest');
+        expect(barFoo).to.have.property('customResolvedPaths');
+        expect(barFoo.customResolvedPaths).to.have.lengthOf(2);
+        expect(barFoo.customResolvedPaths).to.deep.include({
+          destinationPath: 'src/utils/index.js',
+          importSource: '@/utils'
+        });
+        expect(barFoo.customResolvedPaths).to.deep.include({
+          destinationPath: 'src/utils/is-type.js',
+          importSource: '@/utils/is-type'
+        });
+      });
+      describe('importing the component', () => {
+        before(() => {
+          helper.command.exportAllComponents();
+
+          helper.scopeHelper.reInitLocalScope();
+          helper.scopeHelper.addRemoteScope();
+          helper.command.importComponent('bar/foo');
+          fs.outputFileSync(path.join(helper.scopes.localPath, 'app.js'), fixtures.appPrintBarFoo);
+        });
+        it('should generate the non-relative links correctly', () => {
+          const result = helper.command.runCmd('node app.js');
+          expect(result.trim()).to.equal('got is-type and got is-string and got foo');
+        });
+        it('should not show the component as modified', () => {
+          const output = helper.command.runCmd('bit status');
+          expect(output).to.not.have.string('modified');
+        });
+        describe('npm packing the component using an extension npm-pack', () => {
+          let packDir;
+          before(() => {
+            helper.extensions.importNpmPackExtension();
+            packDir = path.join(helper.scopes.localPath, 'pack');
+            helper.command.runCmd(`bit npm-pack ${helper.scopes.remote}/bar/foo -o -k -d ${packDir}`);
+          });
+          it('should create the specified directory', () => {
+            expect(packDir).to.be.a.path();
+          });
+          it('should generate .bit.postinstall.js file', () => {
+            expect(path.join(packDir, '.bit.postinstall.js')).to.be.a.file();
+          });
+          it('should add the postinstall script to the package.json file', () => {
+            const packageJson = helper.packageJson.read(packDir);
+            expect(packageJson).to.have.property('scripts');
+            expect(packageJson.scripts).to.have.property('postinstall');
+            expect(packageJson.scripts.postinstall).to.equal('node .bit.postinstall.js');
+          });
+          it('npm install should create the custom-resolved dir inside node_modules', () => {
+            helper.command.runCmd('npm i', packDir);
+            expect(path.join(packDir, 'node_modules/@/utils/index.js')).to.be.a.file();
+            expect(path.join(packDir, 'node_modules/@/utils/is-type')).to.be.a.file();
+            expect(() => helper.command.runCmd(`node ${packDir}/bar/foo.js`)).to.not.throw();
+          });
+          it('should add the resolve aliases mapping into package.json for the pnp feature', () => {
+            const packageJson = helper.packageJson.read(packDir);
+            const packageName = helper.general.getRequireBitPath('bar', 'foo');
+            expect(packageJson.bit.resolveAliases)
+              .to.have.property('@/utils')
+              .that.equal(`${packageName}/utils/index.js`);
+            expect(packageJson.bit.resolveAliases)
+              .to.have.property('@/utils/is-type')
+              .that.equal(`${packageName}/utils/is-type.js`);
+          });
+        });
+      });
+    });
   });
   describe('using custom module directory when a component uses an internal file of another component', () => {
     const npmCiRegistry = new NpmCiRegistry(helper);

package.json

@@ -76,7 +76,7 @@
     "array-difference": "^0.0.1",
     "async-exit-hook": "^2.0.1",
     "babel-runtime": "^6.23.0",
-    "bit-javascript": "^2.1.1",
+    "bit-javascript": "2.1.2-dev.1",
     "bluebird": "^3.5.3",
     "chalk": "^2.4.1",
     "chokidar": "^3.0.2",

src/links/link-generator.js

@@ -295,33 +295,38 @@ function getInternalCustomResolvedLinks(
   if (!componentDir) {
     throw new Error(`getInternalCustomResolvedLinks, unable to find the written path of ${component.id.toString()}`);
   }
-  const getDestination = (importSource: string) => `node_modules/${importSource}`;
+  const getDestination = ({ destinationPath, importSource }) => {
+    const shouldAddIndexJsFile = destinationPath.endsWith(`${path.basename(importSource)}/index.js`);
+    return `node_modules/${importSource}${shouldAddIndexJsFile ? '/index.js' : ''}`;
+  };
   const invalidImportSources = ['.', '..']; // before v14.1.4 components might have an invalid importSource saved. see #1734
   const isResolvePathsInvalid = customPath => !invalidImportSources.includes(customPath.importSource);
-  return component.customResolvedPaths.filter(customPath => isResolvePathsInvalid(customPath)).map((customPath) => {
-    const sourceAbs = path.join(componentDir, customPath.destinationPath);
-    const dest = getDestination(customPath.importSource);
-    const destAbs = path.join(componentDir, dest);
-    const destRelative = path.relative(path.dirname(destAbs), sourceAbs);
-    const linkContent = getLinkToFileContent(destRelative);
+  return component.customResolvedPaths
+    .filter(customPath => isResolvePathsInvalid(customPath))
+    .map((customPath) => {
+      const sourceAbs = path.join(componentDir, customPath.destinationPath);
+      const dest = getDestination(customPath);
+      const destAbs = path.join(componentDir, dest);
+      const destRelative = path.relative(path.dirname(destAbs), sourceAbs);
+      const linkContent = getLinkToFileContent(destRelative);
 
-    const postInstallSymlink = createNpmLinkFiles && !linkContent;
-    const packageName = componentIdToPackageName(component.id, component.bindingPrefix);
-    const customResolveMapping = { [customPath.importSource]: `${packageName}/${customPath.destinationPath}` };
-    const getSymlink = () => {
-      if (linkContent) return undefined;
-      if (createNpmLinkFiles) return `${packageName}/${customPath.destinationPath}`;
-      return sourceAbs;
-    };
-    return {
-      linkPath: createNpmLinkFiles ? dest : destAbs,
-      linkContent,
-      postInstallLink: createNpmLinkFiles,
-      customResolveMapping,
-      symlinkTo: getSymlink(),
-      postInstallSymlink
-    };
-  });
+      const postInstallSymlink = createNpmLinkFiles && !linkContent;
+      const packageName = componentIdToPackageName(component.id, component.bindingPrefix);
+      const customResolveMapping = { [customPath.importSource]: `${packageName}/${customPath.destinationPath}` };
+      const getSymlink = () => {
+        if (linkContent) return undefined;
+        if (createNpmLinkFiles) return `${packageName}/${customPath.destinationPath}`;
+        return sourceAbs;
+      };
+      return {
+        linkPath: createNpmLinkFiles ? dest : destAbs,
+        linkContent,
+        postInstallLink: createNpmLinkFiles,
+        customResolveMapping,
+        symlinkTo: getSymlink(),
+        postInstallSymlink
+      };
+    });
 }
 
 /**