Create codemod for addressing ESLint warnings (#10032)
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Vendored
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/**
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* Codemod to replace namespaced React calls with named imports
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*
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* Before:
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* import React from 'react'
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* React.useEffect(() => {}, [])
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*
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* After:
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* import { useEffect } from 'react'
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* useEffect(() => {}, [])
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*
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* Usage: jscodeshift -t .jscodeshift/react-import.js <file-path>
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* Example: jscodeshift -t .jscodeshift/react-import.js src/App.native.tsx
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*/
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/* eslint-disable */
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export const parser = 'tsx'
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export default function transformer(file, api) {
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const j = api.jscodeshift
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const root = j(file.source)
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// Find the React import
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let reactImportPath = null
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const reactMembers = new Set()
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root.find(j.ImportDeclaration).forEach(path => {
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const node = path.value
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if (node.source.value === 'react') {
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node.specifiers.forEach(spec => {
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// Check if this is a default import of React
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if (
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spec.type === 'ImportDefaultSpecifier' &&
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spec.local.name === 'React'
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) {
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reactImportPath = path
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}
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})
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}
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})
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if (!reactImportPath) {
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// No React import found, nothing to do
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return file.source
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}
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// Find all React.* member expressions
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root
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.find(j.MemberExpression)
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.filter(path => {
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const node = path.value
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return (
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node.object.type === 'Identifier' &&
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node.object.name === 'React' &&
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node.property.type === 'Identifier'
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)
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})
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.forEach(path => {
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const propertyName = path.value.property.name
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reactMembers.add(propertyName)
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})
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// Find all React.* JSX member expressions (e.g., <React.Fragment>)
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root
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.find(j.JSXMemberExpression)
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.filter(path => {
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const node = path.value
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return node.object.name === 'React' && node.property.name
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})
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.forEach(path => {
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const propertyName = path.value.property.name
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reactMembers.add(propertyName)
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})
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// If no React members are used, remove the import
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if (reactMembers.size === 0) {
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reactImportPath.prune()
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return root.toSource()
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}
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// Sort the members for consistent output
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const sortedMembers = Array.from(reactMembers).sort()
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// Create new import specifiers
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const newSpecifiers = sortedMembers.map(name =>
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j.importSpecifier(j.identifier(name), j.identifier(name)),
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)
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// Get the existing import specifiers
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const sortedImports = Array.from(reactImportPath.value.specifiers).sort()
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const existingSpecifiers = sortedImports.filter(
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specifier => specifier.type !== 'ImportDefaultSpecifier',
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)
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const allSpecifiers = [
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...new Map(
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[...existingSpecifiers, ...newSpecifiers].map(item => [
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item.imported.name,
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item,
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]),
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).values(),
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]
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// Update the import declaration
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reactImportPath.value.specifiers = allSpecifiers
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// Replace all React.* member expressions with just the identifier
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root
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.find(j.MemberExpression)
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.filter(path => {
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const node = path.value
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return (
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node.object.type === 'Identifier' &&
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node.object.name === 'React' &&
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node.property.type === 'Identifier'
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)
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})
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.replaceWith(path => {
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return j.identifier(path.value.property.name)
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})
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// Replace all React.* JSX member expressions with just the identifier
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root
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.find(j.JSXMemberExpression)
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.filter(path => {
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const node = path.value
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return node.object.name === 'React' && node.property.name
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})
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.replaceWith(path => {
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return j.jsxIdentifier(path.value.property.name)
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})
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return root.toSource()
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}
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