cef62 · May 30, 2022 15:30 · May 30, 2022
diff --git a/fixPackageJsonExports.mjs b/fixPackageJsonExports.mjs
@@ -0,0 +1,88 @@
+// @ts-check
+
+import path from 'path'
+import { readFile, writeFile } from 'fs/promises'
+import glob from 'tiny-glob'
+
+/**
+ * @typedef {object} LegacyExportField
+ * @property {string} [types]
+ * @property {string} [import]
+ * @property {string} [require]
+ */
+
+/**
+ * @typedef {object} ExportFieldEntry
+ * @property {string} [types]
+ * @property {string} [default]
+ */
+
+/**
+ * @typedef {object} ExportField
+ * @property {ExportFieldEntry | string} [import]
+ * @property {ExportFieldEntry | string} [require]
+ */
+
+/**
+ * @typedef {object} PackageJson
+ * @property {string} [name]
+ * @property {Record<string, LegacyExportField> | Record<string, ExportField>} [exports]
+ */
+
+async function fixPackageJsonExports() {
+  let packageJsonList = await glob('**/package.json')
+
+  for (const packageJsonPath of packageJsonList) {
+    try {
+      const rootDir = '.'
+      const pkgPath = path.join(rootDir, packageJsonPath)
+      const pkgUrl = new URL(pkgPath, import.meta.url)
+
+      /** @type {PackageJson} */
+      const pkg = JSON.parse(await readFile(pkgUrl, { encoding: 'utf8' }))
+
+      // skip projects without mapped exports
+      if (!pkg.exports || Object.keys(pkg.exports).length === 0) continue
+
+      for (const key of Object.keys(pkg.exports)) {
+        const entry = pkg.exports?.[key]
+
+        if (entry && 'types' in entry) {
+          /** @type {LegacyExportField} */
+          const field = entry
+
+          pkg.exports[key] = {}
+
+          if (field.types) {
+            // the entry has types definitions
+
+            if (field.import) {
+              pkg.exports[key].import = { types: field.types, default: field.import }
+            }
+
+            if (field.require) {
+              pkg.exports[key].require = { types: field.types, default: field.require }
+            }
+          } else {
+            // the entry is withou types definitions           
+
+            if (field.import) {
+              pkg.exports[key].import = field.import
+            }
+
+            if (field.require) {
+              pkg.exports[key].require = field.require
+            }
+          }
+        }
+      }
+
+      const content = JSON.stringify(pkg, null, 2) + '\n'
+      await writeFile(pkgUrl, content, { encoding: 'utf8', flag: 'w' })
+    } catch (e) {
+      console.log(e)
+    }
+  }
+}
+
+fixPackageJsonExports()