Function injectPluginIntoFile

packages/devtools-vite/src/inject-plugin.ts:266–300

(
  filePath: string,
  injection: PluginInjection,
)

 * Reads the file, transforms it, and writes it back
 */
export function injectPluginIntoFile(
  filePath: string,
  injection: PluginInjection,
): { success: boolean; error?: string } {
  try {
    const code = readFileSync(filePath, 'utf-8')

    const devtoolsComponentName = findDevtoolsComponentName(code)
    if (!devtoolsComponentName) {
      return {
        success: false,
        error: 'Could not find TanStackDevtools import',
      }
    }

    const result = transformAndInject(code, injection, devtoolsComponentName)

    if (!result?.transformed) {
      return {
        success: false,
        error: 'Plugin already exists or no TanStackDevtools component found',
      }
    }

    writeFileSync(filePath, result.code, 'utf-8')

    return { success: true }
  } catch (e) {
    console.error('Error injecting plugin:', e)
    return {
      success: false,
      error: e instanceof Error ? e.message : 'Unknown error',
    }
  }
}