From 1523bbc78654e34dc275281b6025cf0d645fcb5e Mon Sep 17 00:00:00 2001
From: zhong666 <aa900031@gmail.com>
Date: Fri, 23 Dec 2022 22:06:14 +0800
Subject: [PATCH] fix: ignore `type` imports and exports (#124)

---
 src/analyze.ts       |  9 +++++++--
 test/exports.test.ts | 11 +++++++++++
 test/imports.test.ts |  5 +++++
 3 files changed, 23 insertions(+), 2 deletions(-)

diff --git a/src/analyze.ts b/src/analyze.ts
index 715df26..3a44a9c 100644
--- a/src/analyze.ts
+++ b/src/analyze.ts
@@ -62,6 +62,7 @@ export const EXPORT_DECAL_RE = /\bexport\s+(?<declaration>(async function|functi
 const EXPORT_NAMED_RE = /\bexport\s+{(?<exports>[^}]+?)[\s,]*}(\s*from\s*["']\s*(?<specifier>(?<="\s*)[^"]*[^\s"](?=\s*")|(?<='\s*)[^']*[^\s'](?=\s*'))\s*["'][^\n;]*)?/g;
 const EXPORT_STAR_RE = /\bexport\s*(\*)(\s*as\s+(?<name>[\w$]+)\s+)?\s*(\s*from\s*["']\s*(?<specifier>(?<="\s*)[^"]*[^\s"](?=\s*")|(?<='\s*)[^']*[^\s'](?=\s*'))\s*["'][^\n;]*)?/g;
 const EXPORT_DEFAULT_RE = /\bexport\s+default\s+/g;
+const TYPE_RE = /^\s*?type\s/;
 
 export function findStaticImports (code: string): StaticImport[] {
   return matchAll(ESM_STATIC_IMPORT_RE, code, { type: "static" });
@@ -79,7 +80,7 @@ export function parseStaticImport (matched: StaticImport): ParsedStaticImport {
   const namedImports = {};
   for (const namedImport of cleanedImports.match(/{([^}]*)}/)?.[1]?.split(",") || []) {
     const [, source = namedImport.trim(), importName = source] = namedImport.match(/^\s*(\S*) as (\S*)\s*$/) || [];
-    if (source) {
+    if (source && !TYPE_RE.test(source)) {
       namedImports[source] = importName;
     }
   }
@@ -102,7 +103,11 @@ export function findExports (code: string): ESMExport[] {
   // Find named exports
   const namedExports: NamedExport[] = matchAll(EXPORT_NAMED_RE, code, { type: "named" });
   for (const namedExport of namedExports) {
-    namedExport.names = namedExport.exports.replace(/^\r?\n?/, "").split(/\s*,\s*/g).map(name => name.replace(/^.*?\sas\s/, "").trim());
+    namedExport.names = namedExport.exports
+      .replace(/^\r?\n?/, "")
+      .split(/\s*,\s*/g)
+      .filter(name => !TYPE_RE.test(name))
+      .map(name => name.replace(/^.*?\sas\s/, "").trim());
   }
 
   // Find export default
diff --git a/test/exports.test.ts b/test/exports.test.ts
index 82190ea..0182843 100644
--- a/test/exports.test.ts
+++ b/test/exports.test.ts
@@ -146,6 +146,17 @@ export default function useMain() {}
     expect(matches1[0].name).toEqual("default");
     expect(matches2).toEqual(matches1);
   });
+
+  it("ignore export type", () => {
+    const code = `
+export { type AType, type B as BType, foo } from 'foo'
+`;
+    const matches = findExports(code);
+    expect(matches).toHaveLength(1);
+    expect(matches[0].names).toHaveLength(1);
+    expect(matches[0].names[0]).toEqual("foo");
+    expect(matches[0].name).toEqual("foo");
+  });
 });
 
 describe("fineExportNames", () => {
diff --git a/test/imports.test.ts b/test/imports.test.ts
index d2681b4..6812ae8 100644
--- a/test/imports.test.ts
+++ b/test/imports.test.ts
@@ -92,6 +92,11 @@ staticTests[`import {
   namedImports: { Component: "Component" }
 };
 
+staticTests["import { foo, type Foo } from \"foo\""] = {
+  specifier: "foo",
+  namedImports: { foo: "foo" }
+};
+
 // -- Dynamic import --
 const dynamicTests = {
   "const { test, /* here */, another, } = await import ( \"module-name\" );": {