Function transformer

packages/next-codemod/transforms/next-image-experimental.ts:258–328

(
  file: FileInfo,
  _api: API,
  options: Options
)

}

export default function transformer(
  file: FileInfo,
  _api: API,
  options: Options
) {
  const j = createParserFromPath(file.path)
  const root = j(file.source)

  const isConfig = isNextConfigFile(file)

  if (isConfig) {
    const fileDir = parse(file.path).dir
    const result = nextConfigTransformer(j, root, fileDir)
    return result.toSource(options)
  }

  // Before: import Image from "next/legacy/image"
  //  After: import Image from "next/image"
  root
    .find(j.ImportDeclaration, {
      source: { value: 'next/legacy/image' },
    })
    .forEach((imageImport) => {
      const defaultSpecifier = imageImport.node.specifiers?.find(
        (node) => node.type === 'ImportDefaultSpecifier'
      ) as ImportDefaultSpecifier | undefined
      const tagName = defaultSpecifier?.local?.name
      imageImport.node.source = j.stringLiteral('next/image')
      if (tagName) {
        findAndReplaceProps(j, root, tagName)
      }
    })
  // Before: const Image = await import("next/legacy/image")
  //  After: const Image = await import("next/image")
  root.find(j.AwaitExpression).forEach((awaitExp) => {
    const arg = awaitExp.value.argument
    if (arg?.type === 'CallExpression' && arg.callee.type === 'Import') {
      if (
        arg.arguments[0].type === 'StringLiteral' &&
        arg.arguments[0].value === 'next/legacy/image'
      ) {
        arg.arguments[0] = j.stringLiteral('next/image')
      }
    }
  })

  // Before: const Image = require("next/legacy/image")
  //  After: const Image = require("next/image")
  root.find(j.CallExpression).forEach((requireExp) => {
    if (
      requireExp?.value?.callee?.type === 'Identifier' &&
      requireExp.value.callee.name === 'require'
    ) {
      let firstArg = requireExp.value.arguments[0]
      if (
        firstArg &&
        firstArg.type === 'StringLiteral' &&
        firstArg.value === 'next/legacy/image'