JSCodeShift for Sanity client v5 (default import => named import)

sanity-v5-codeshift.js

const importName = 'createClient'

v5ClientImport.parser = 'tsx'
module.exports = v5ClientImport

function v5ClientImport(fileInfo, api) {
  const j = api.jscodeshift
  const root = j(fileInfo.source)

  // Imports
  // from: import SanityClient from '@sanity/client'
  //   to: import {createClient as SanityClient} from '@sanity/client'
  //
  // from: import createClient, {MutationOptions} from '@sanity/client'
  //   to: import {createClient, MutationOptions} from '@sanity/client'
  root
    .find(api.jscodeshift.ImportDeclaration, (node) => node.source.value === '@sanity/client')
    .filter(
      (path) =>
        path.node.source.value === '@sanity/client' &&
        path.value.specifiers.some((specifier) => specifier.type === 'ImportDefaultSpecifier')
    )
    .forEach((path) => {
      const defaultSpecifier = path.value.specifiers.find(
        (specifier) => specifier.type === 'ImportDefaultSpecifier'
      )
      const namedImports = path.value.specifiers.filter(
        (specifier) => specifier !== defaultSpecifier
      )
      const oldName = defaultSpecifier.local.name

      j(path).replaceWith(
        j.importDeclaration(
          [j.importSpecifier(j.identifier(importName), j.identifier(oldName)), ...namedImports],
          j.literal('@sanity/client')
        )
      )
    })

  // Requires
  // from: const SanityClient = require('@sanity/client')
  //   to: const {createClient: SanityClient} = require('@sanity/client')
  root
    .find(j.VariableDeclarator, {
      id: {type: 'Identifier'},
      init: {callee: {name: 'require'}},
    })
    .filter((path) => path.value.init.arguments[0].value === '@sanity/client')
    .forEach((path) => {
      const oldName = path.value.id.name
      const prop = j.objectProperty(j.identifier(importName), j.identifier(oldName), false, true)

      // Avoid `const {createClient: createClient} = require('@sanity/client')`
      if (oldName === importName) {
        prop.shorthand = true
      }

      j(path).replaceWith(
        j.variableDeclarator(
          j.objectPattern([prop]),
          j.callExpression(j.identifier('require'), [j.stringLiteral('@sanity/client')])
        )
      )
    })

  return root.toSource()
}