fix: TS import issue (#92)

* fix ts import issue

* Update vitest.config.ts

src/sh.js

@@ -1,5 +1,5 @@
 import child_process from 'child_process'
-import { debug } from './log.ts'
+import { debug } from './log.js'
 
 // From https://stackoverflow.com/a/68958420/9847645, to avoid 200Kb limit causing ENOBUFS errors for large output
 const sh = (cmd, { throwOnError = true } = {}) =>

vitest.config.ts

@@ -1,7 +1,27 @@
 import { defineConfig } from 'vitest/config'
+import fs from 'fs'
+import path from 'path'
 
-export default defineConfig({
-  test: {
-    retry: 2,
+const fileExists = (filePath: string): boolean => fs.existsSync(filePath)
+
+const resolveJsToTs = (source: string, importer: string | undefined): string | null => {
+  if (!importer || !source.endsWith('.js')) return null
+
+  const jsFilePath = path.resolve(path.dirname(importer), source)
+  const tsFilePath = jsFilePath.replace(/\.js$/, '.ts')
+
+  // If the .js file doesn't exist but the .ts file does, resolve to the .ts file.
+  return !fileExists(jsFilePath) && fileExists(tsFilePath) ? tsFilePath : null
+}
+
+const jsToTsResolver = {
+  name: 'jsToTsResolver',
+  resolveId(source: string, importer: string | undefined) {
+    return resolveJsToTs(source, importer)
   },
+}
+
+export default defineConfig({
+  test: { retry: 2 },
+  plugins: [jsToTsResolver],
 })