/
renamer.ts
158 lines (131 loc) 路 4.35 KB
/
renamer.ts
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import type Binding from "../binding";
import splitExportDeclaration from "@babel/helper-split-export-declaration";
import * as t from "@babel/types";
import type { NodePath, Visitor } from "../..";
import { requeueComputedKeyAndDecorators } from "@babel/helper-environment-visitor";
import { traverseNode } from "../../traverse-node";
import { explode } from "../../visitors";
const renameVisitor: Visitor<Renamer> = {
ReferencedIdentifier({ node }, state) {
if (node.name === state.oldName) {
node.name = state.newName;
}
},
Scope(path, state) {
if (
!path.scope.bindingIdentifierEquals(
state.oldName,
state.binding.identifier,
)
) {
path.skip();
if (path.isMethod()) {
requeueComputedKeyAndDecorators(path);
}
}
},
"AssignmentExpression|Declaration|VariableDeclarator"(
path: NodePath<t.AssignmentPattern | t.Declaration | t.VariableDeclarator>,
state,
) {
if (path.isVariableDeclaration()) return;
const ids = path.getOuterBindingIdentifiers();
for (const name in ids) {
if (name === state.oldName) ids[name].name = state.newName;
}
},
};
export default class Renamer {
constructor(binding: Binding, oldName: string, newName: string) {
this.newName = newName;
this.oldName = oldName;
this.binding = binding;
}
declare oldName: string;
declare newName: string;
declare binding: Binding;
maybeConvertFromExportDeclaration(parentDeclar: NodePath) {
const maybeExportDeclar = parentDeclar.parentPath;
if (!maybeExportDeclar.isExportDeclaration()) {
return;
}
if (maybeExportDeclar.isExportDefaultDeclaration()) {
const { declaration } = maybeExportDeclar.node;
if (t.isDeclaration(declaration) && !declaration.id) {
return;
}
}
if (maybeExportDeclar.isExportAllDeclaration()) {
return;
}
splitExportDeclaration(
maybeExportDeclar as NodePath<
Exclude<t.ExportDeclaration, t.ExportAllDeclaration>
>,
);
}
maybeConvertFromClassFunctionDeclaration(path: NodePath) {
return path; // TODO
// // retain the `name` of a class/function declaration
// if (!path.isFunctionDeclaration() && !path.isClassDeclaration()) return;
// if (this.binding.kind !== "hoisted") return;
// path.node.id = identifier(this.oldName);
// path.node._blockHoist = 3;
// path.replaceWith(
// variableDeclaration("let", [
// variableDeclarator(identifier(this.newName), toExpression(path.node)),
// ]),
// );
}
maybeConvertFromClassFunctionExpression(path: NodePath) {
return path; // TODO
// // retain the `name` of a class/function expression
// if (!path.isFunctionExpression() && !path.isClassExpression()) return;
// if (this.binding.kind !== "local") return;
// path.node.id = identifier(this.oldName);
// this.binding.scope.parent.push({
// id: identifier(this.newName),
// });
// path.replaceWith(
// assignmentExpression("=", identifier(this.newName), path.node),
// );
}
// TODO(Babel 8): Rename this `block` parameter. It's not needed anywhere.
rename(block?: t.Pattern | t.Scopable) {
const { binding, oldName, newName } = this;
const { scope, path } = binding;
const parentDeclar = path.find(
path =>
path.isDeclaration() ||
path.isFunctionExpression() ||
path.isClassExpression(),
);
if (parentDeclar) {
const bindingIds = parentDeclar.getOuterBindingIdentifiers();
if (bindingIds[oldName] === binding.identifier) {
// When we are renaming an exported identifier, we need to ensure that
// the exported binding keeps the old name.
this.maybeConvertFromExportDeclaration(parentDeclar);
}
}
traverseNode(
block || scope.block,
explode(renameVisitor),
scope,
this,
scope.path,
// When blockToTraverse is a SwitchStatement, the discriminant
// is not part of the current scope and thus should be skipped.
{ discriminant: true },
);
if (!block) {
scope.removeOwnBinding(oldName);
scope.bindings[newName] = binding;
this.binding.identifier.name = newName;
}
if (parentDeclar) {
this.maybeConvertFromClassFunctionDeclaration(path);
this.maybeConvertFromClassFunctionExpression(path);
}
}
}