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rOACCT/node_modules/@babel/helper-module-transforms/lib/rewrite-live-references.js
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rewrite-live-references.js
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"use strict";
Object.defineProperty(exports, "__esModule", {
value: true
});
exports.default = rewriteLiveReferences;
var _assert = _interopRequireDefault(require("assert"));
var t = _interopRequireWildcard(require("@babel/types"));
var _template = _interopRequireDefault(require("@babel/template"));
var _helperSimpleAccess = _interopRequireDefault(require("@babel/helper-simple-access"));
function _getRequireWildcardCache() { if (typeof WeakMap !== "function") return null; var cache = new WeakMap(); _getRequireWildcardCache = function () { return cache; }; return cache; }
function _interopRequireWildcard(obj) { if (obj && obj.__esModule) { return obj; } if (obj === null || typeof obj !== "object" && typeof obj !== "function") { return { default: obj }; } var cache = _getRequireWildcardCache(); if (cache && cache.has(obj)) { return cache.get(obj); } var newObj = {}; var hasPropertyDescriptor = Object.defineProperty && Object.getOwnPropertyDescriptor; for (var key in obj) { if (Object.prototype.hasOwnProperty.call(obj, key)) { var desc = hasPropertyDescriptor ? Object.getOwnPropertyDescriptor(obj, key) : null; if (desc && (desc.get || desc.set)) { Object.defineProperty(newObj, key, desc); } else { newObj[key] = obj[key]; } } } newObj.default = obj; if (cache) { cache.set(obj, newObj); } return newObj; }
function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }
function rewriteLiveReferences(programPath, metadata) {
const imported = new Map();
const exported = new Map();
const requeueInParent = path => {
programPath.requeue(path);
};
for (const [source, data] of metadata.source) {
for (const [localName, importName] of data.imports) {
imported.set(localName, [source, importName, null]);
}
for (const localName of data.importsNamespace) {
imported.set(localName, [source, null, localName]);
}
}
for (const [local, data] of metadata.local) {
let exportMeta = exported.get(local);
if (!exportMeta) {
exportMeta = [];
exported.set(local, exportMeta);
}
exportMeta.push(...data.names);
}
programPath.traverse(rewriteBindingInitVisitor, {
metadata,
requeueInParent,
scope: programPath.scope,
exported
});
(0, _helperSimpleAccess.default)(programPath, new Set([...Array.from(imported.keys()), ...Array.from(exported.keys())]));
programPath.traverse(rewriteReferencesVisitor, {
seen: new WeakSet(),
metadata,
requeueInParent,
scope: programPath.scope,
imported,
exported,
buildImportReference: ([source, importName, localName], identNode) => {
const meta = metadata.source.get(source);
if (localName) {
if (meta.lazy) identNode = t.callExpression(identNode, []);
return identNode;
}
let namespace = t.identifier(meta.name);
if (meta.lazy) namespace = t.callExpression(namespace, []);
const computed = metadata.stringSpecifiers.has(importName);
return t.memberExpression(namespace, computed ? t.stringLiteral(importName) : t.identifier(importName), computed);
}
});
}
const rewriteBindingInitVisitor = {
Scope(path) {
path.skip();
},
ClassDeclaration(path) {
const {
requeueInParent,
exported,
metadata
} = this;
const {
id
} = path.node;
if (!id) throw new Error("Expected class to have a name");
const localName = id.name;
const exportNames = exported.get(localName) || [];
if (exportNames.length > 0) {
const statement = t.expressionStatement(buildBindingExportAssignmentExpression(metadata, exportNames, t.identifier(localName)));
statement._blockHoist = path.node._blockHoist;
requeueInParent(path.insertAfter(statement)[0]);
}
},
VariableDeclaration(path) {
const {
requeueInParent,
exported,
metadata
} = this;
Object.keys(path.getOuterBindingIdentifiers()).forEach(localName => {
const exportNames = exported.get(localName) || [];
if (exportNames.length > 0) {
const statement = t.expressionStatement(buildBindingExportAssignmentExpression(metadata, exportNames, t.identifier(localName)));
statement._blockHoist = path.node._blockHoist;
requeueInParent(path.insertAfter(statement)[0]);
}
});
}
};
const buildBindingExportAssignmentExpression = (metadata, exportNames, localExpr) => {
return (exportNames || []).reduce((expr, exportName) => {
const {
stringSpecifiers
} = metadata;
const computed = stringSpecifiers.has(exportName);
return t.assignmentExpression("=", t.memberExpression(t.identifier(metadata.exportName), computed ? t.stringLiteral(exportName) : t.identifier(exportName), computed), expr);
}, localExpr);
};
const buildImportThrow = localName => {
return _template.default.expression.ast`
(function() {
throw new Error('"' + '${localName}' + '" is read-only.');
})()
`;
};
const rewriteReferencesVisitor = {
ReferencedIdentifier(path) {
const {
seen,
buildImportReference,
scope,
imported,
requeueInParent
} = this;
if (seen.has(path.node)) return;
seen.add(path.node);
const localName = path.node.name;
const localBinding = path.scope.getBinding(localName);
const rootBinding = scope.getBinding(localName);
if (rootBinding !== localBinding) return;
const importData = imported.get(localName);
if (importData) {
const ref = buildImportReference(importData, path.node);
ref.loc = path.node.loc;
if ((path.parentPath.isCallExpression({
callee: path.node
}) || path.parentPath.isOptionalCallExpression({
callee: path.node
}) || path.parentPath.isTaggedTemplateExpression({
tag: path.node
})) && t.isMemberExpression(ref)) {
path.replaceWith(t.sequenceExpression([t.numericLiteral(0), ref]));
} else if (path.isJSXIdentifier() && t.isMemberExpression(ref)) {
const {
object,
property
} = ref;
path.replaceWith(t.JSXMemberExpression(t.JSXIdentifier(object.name), t.JSXIdentifier(property.name)));
} else {
path.replaceWith(ref);
}
requeueInParent(path);
path.skip();
}
},
AssignmentExpression: {
exit(path) {
const {
scope,
seen,
imported,
exported,
requeueInParent,
buildImportReference
} = this;
if (seen.has(path.node)) return;
seen.add(path.node);
const left = path.get("left");
if (left.isMemberExpression()) return;
if (left.isIdentifier()) {
const localName = left.node.name;
if (scope.getBinding(localName) !== path.scope.getBinding(localName)) {
return;
}
const exportedNames = exported.get(localName);
const importData = imported.get(localName);
if ((exportedNames == null ? void 0 : exportedNames.length) > 0 || importData) {
(0, _assert.default)(path.node.operator === "=", "Path was not simplified");
const assignment = path.node;
if (importData) {
assignment.left = buildImportReference(importData, assignment.left);
assignment.right = t.sequenceExpression([assignment.right, buildImportThrow(localName)]);
}
path.replaceWith(buildBindingExportAssignmentExpression(this.metadata, exportedNames, assignment));
requeueInParent(path);
}
} else {
const ids = left.getOuterBindingIdentifiers();
const programScopeIds = Object.keys(ids).filter(localName => scope.getBinding(localName) === path.scope.getBinding(localName));
const id = programScopeIds.find(localName => imported.has(localName));
if (id) {
path.node.right = t.sequenceExpression([path.node.right, buildImportThrow(id)]);
}
const items = [];
programScopeIds.forEach(localName => {
const exportedNames = exported.get(localName) || [];
if (exportedNames.length > 0) {
items.push(buildBindingExportAssignmentExpression(this.metadata, exportedNames, t.identifier(localName)));
}
});
if (items.length > 0) {
let node = t.sequenceExpression(items);
if (path.parentPath.isExpressionStatement()) {
node = t.expressionStatement(node);
node._blockHoist = path.parentPath.node._blockHoist;
}
const statement = path.insertAfter(node)[0];
requeueInParent(statement);
}
}
}
},
"ForOfStatement|ForInStatement"(path) {
const {
scope,
node
} = path;
const {
left
} = node;
const {
exported,
scope: programScope
} = this;
if (!t.isVariableDeclaration(left)) {
let didTransform = false;
const bodyPath = path.get("body");
const loopBodyScope = bodyPath.scope;
for (const name of Object.keys(t.getOuterBindingIdentifiers(left))) {
if (exported.get(name) && programScope.getBinding(name) === scope.getBinding(name)) {
didTransform = true;
if (loopBodyScope.hasOwnBinding(name)) {
loopBodyScope.rename(name);
}
}
}
if (!didTransform) {
return;
}
const newLoopId = scope.generateUidIdentifierBasedOnNode(left);
bodyPath.unshiftContainer("body", t.expressionStatement(t.assignmentExpression("=", left, newLoopId)));
path.get("left").replaceWith(t.variableDeclaration("let", [t.variableDeclarator(t.cloneNode(newLoopId))]));
scope.registerDeclaration(path.get("left"));
}
}
};
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