Update eui.d.ts generator to properly handle nested index files

package.json

@@ -41,6 +41,7 @@
     "url": "https://github.com/elastic/eui.git"
   },
   "dependencies": {
+    "@types/lodash": "^4.14.116",
     "@types/numeral": "^0.0.25",
     "classnames": "^2.2.5",
     "core-js": "^2.5.1",
@@ -74,7 +75,6 @@
     "@types/classnames": "^2.2.6",
     "@types/enzyme": "^3.1.13",
     "@types/jest": "^23.3.9",
-    "@types/lodash": "^4.14.116",
     "@types/react": "^16.3.0",
     "@types/react-virtualized": "^9.18.6",
     "@types/uuid": "^3.4.4",
@@ -112,6 +112,7 @@
     "eslint-plugin-prettier": "^2.6.0",
     "eslint-plugin-react": "^7.4.0",
     "file-loader": "^1.1.11",
+    "findup": "^0.1.5",
     "fork-ts-checker-webpack-plugin": "^0.4.4",
     "geckodriver": "^1.11.0",
     "glob": "^7.1.2",
@@ -142,6 +143,7 @@
     "react-test-renderer": "^16.2.0",
     "redux": "^3.7.2",
     "redux-thunk": "^2.2.0",
+    "resolve": "^1.5.0",
     "rimraf": "^2.6.2",
     "sass-extract": "^2.1.0",
     "sass-extract-js": "^0.3.0",

scripts/dtsgenerator.js

@@ -1,42 +1,65 @@
+const findup = require('findup');
+const resolve = require('resolve');
 const fs = require('fs');
 const path = require('path');
 const dtsGenerator = require('dts-generator').default;
 
 const baseDir = path.resolve(__dirname, '..');
+const srcDir = path.resolve(baseDir, 'src');
+
+function hasParentIndex(pathToFile) {
+  const isIndexFile = path.basename(pathToFile, path.extname(pathToFile)) === 'index';
+  try {
+    const fileDirectory = path.dirname(pathToFile);
+    const parentIndex = findup.sync(
+      // if this is an index file start looking in its parent directory
+      isIndexFile ? path.resolve(fileDirectory, '..') : fileDirectory,
+      'index.ts'
+    );
+    // ensure the found file is in the project
+    return parentIndex.startsWith(baseDir);
+  } catch (e) {
+    return false;
+  }
+}
 
 const generator = dtsGenerator({
   name: '@elastic/eui',
   project: baseDir,
   out: 'eui.d.ts',
   exclude: ['node_modules/**/*.d.ts', 'src/custom_typings/**/*.d.ts'],
   resolveModuleId(params) {
-    if (path.basename(params.currentModuleId) === 'index') {
+    if (path.basename(params.currentModuleId) === 'index' && !hasParentIndex(path.resolve(baseDir, params.currentModuleId))) {
       // this module is exporting from an `index(.d)?.ts` file, declare its exports straight to @elastic/eui module
       return '@elastic/eui';
     } else {
       // otherwise export as the module's path relative to the @elastic/eui namespace
-      return path.join('@elastic/eui', params.currentModuleId);
+      if (params.currentModuleId.endsWith('/index')) {
+        return path.join('@elastic/eui', path.dirname(params.currentModuleId));
+      } else {
+        return path.join('@elastic/eui', params.currentModuleId);
+      }
     }
   },
   resolveModuleImport(params) {
     // only intercept relative imports (don't modify node-modules references)
-    const isRelativeImport = params.importedModuleId[0] === '.';
+    const importFromBaseDir = path.resolve(baseDir, path.dirname(params.currentModuleId));
+    const isFromEuiSrc = importFromBaseDir.startsWith(srcDir);
+    const isRelativeImport = isFromEuiSrc && params.importedModuleId[0] === '.';
 
     if (isRelativeImport) {
-      // if importing an `index` file
-      let isModuleIndex = false;
-      if (path.basename(params.importedModuleId) === 'index') {
-        isModuleIndex = true;
-      } else {
-        const basePath = path.resolve(baseDir, path.dirname(params.currentModuleId));
-        // check if the imported module resolves to ${importedModuleId}/index.ts
-        if (!fs.existsSync(path.resolve(basePath, `${params.importedModuleId}.ts`))) {
-          // not pointing at ${importedModuleId}.ts, check if it's a directory with `index.ts`
-          if (fs.existsSync(path.resolve(basePath, `${params.importedModuleId}/index.ts`))) {
-            isModuleIndex = true;
-          }
+      // if importing from an `index` file (directly or targeting a directory with an index),
+      // then if there is no parent index file this should import from @elastic/eui
+      const importPathTarget = resolve.sync(
+        params.importedModuleId,
+        {
+          basedir: importFromBaseDir,
+          extensions: ['.ts', '.tsx'],
         }
-      }
+      );
+
+      const isIndexFile = importPathTarget.endsWith('/index.ts');
+      const isModuleIndex = isIndexFile && !hasParentIndex(importPathTarget);
 
       if (isModuleIndex) {
         // importing an `index` file, in `resolveModuleId` above we change those modules to '@elastic/eui'
@@ -55,11 +78,14 @@ const generator = dtsGenerator({
   },
 });
 
-// strip any `/// <reference` lines from the generated eui.d.ts
+// 1. strip any `/// <reference` lines from the generated eui.d.ts
+// 2. replace any import("src/...") declarations to import("@elastic/src/...")
 generator.then(() => {
   const defsFilePath = path.resolve(baseDir, 'eui.d.ts');
   fs.writeFileSync(
     defsFilePath,
-    fs.readFileSync(defsFilePath).toString().replace(/\/\/\/\W+<reference.*/g, '')
+    fs.readFileSync(defsFilePath).toString()
+      .replace(/\/\/\/\W+<reference.*/g, '') // 1.
+      .replace(/import\(\"src\/(.*?)\"\)/g, 'import("@elastic/eui/src/$1")') // 2.
   );
 });

yarn.lock

@@ -2901,6 +2901,11 @@ colors@^1.1.2:
   resolved "https://registry.yarnpkg.com/colors/-/colors-1.3.0.tgz#5f20c9fef6945cb1134260aab33bfbdc8295e04e"
   integrity sha512-EDpX3a7wHMWFA7PUHWPHNWqOxIIRSJetuwl0AS5Oi/5FMV8kWm69RTlgm00GKjBO1xFHMtBbL49yRtMMdticBw==
 
+colors@~0.6.0-1:
+  version "0.6.2"
+  resolved "https://registry.yarnpkg.com/colors/-/colors-0.6.2.tgz#2423fe6678ac0c5dae8852e5d0e5be08c997abcc"
+  integrity sha1-JCP+ZnisDF2uiFLl0OW+CMmXq8w=
+
 colors@~1.1.2:
   version "1.1.2"
   resolved "https://registry.yarnpkg.com/colors/-/colors-1.1.2.tgz#168a4701756b6a7f51a12ce0c97bfa28c084ed63"
@@ -2952,6 +2957,11 @@ commander@^2.9.0, commander@~2.13.0:
   resolved "https://registry.yarnpkg.com/commander/-/commander-2.13.0.tgz#6964bca67685df7c1f1430c584f07d7597885b9c"
   integrity sha512-MVuS359B+YzaWqjCL/c+22gfryv+mCBPHAv3zyVI2GN8EY6IRP8VwtasXn8jyyhvvq84R4ImN1OKRtcbIasjYA==
 
+commander@~2.1.0:
+  version "2.1.0"
+  resolved "https://registry.yarnpkg.com/commander/-/commander-2.1.0.tgz#d121bbae860d9992a3d517ba96f56588e47c6781"
+  integrity sha1-0SG7roYNmZKj1Re6lvVliOR8Z4E=
+
 commander@~2.17.1:
   version "2.17.1"
   resolved "https://registry.yarnpkg.com/commander/-/commander-2.17.1.tgz#bd77ab7de6de94205ceacc72f1716d29f20a77bf"
@@ -5272,6 +5282,14 @@ find-versions@^1.0.0:
     meow "^3.5.0"
     semver-regex "^1.0.0"
 
+findup@^0.1.5:
+  version "0.1.5"
+  resolved "https://registry.yarnpkg.com/findup/-/findup-0.1.5.tgz#8ad929a3393bac627957a7e5de4623b06b0e2ceb"
+  integrity sha1-itkpozk7rGJ5V6fl3kYjsGsOLOs=
+  dependencies:
+    colors "~0.6.0-1"
+    commander "~2.1.0"
+
 first-chunk-stream@^2.0.0:
   version "2.0.0"
   resolved "https://registry.yarnpkg.com/first-chunk-stream/-/first-chunk-stream-2.0.0.tgz#1bdecdb8e083c0664b91945581577a43a9f31d70"