407 lines
18 KiB
JavaScript
407 lines
18 KiB
JavaScript
"use strict";
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Object.defineProperty(exports, "__esModule", {
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value: true
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});
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exports.default = void 0;
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exports.getExportSpecifierName = getExportSpecifierName;
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var _helperPluginUtils = require("@babel/helper-plugin-utils");
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var _core = require("@babel/core");
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var _helperModuleTransforms = require("@babel/helper-module-transforms");
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var _helperValidatorIdentifier = require("@babel/helper-validator-identifier");
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const buildTemplate = _core.template.statement(`
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SYSTEM_REGISTER(MODULE_NAME, SOURCES, function (EXPORT_IDENTIFIER, CONTEXT_IDENTIFIER) {
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"use strict";
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BEFORE_BODY;
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return {
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setters: SETTERS,
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execute: EXECUTE,
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};
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});
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`);
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const buildExportAll = _core.template.statement(`
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for (var KEY in TARGET) {
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if (KEY !== "default" && KEY !== "__esModule") EXPORT_OBJ[KEY] = TARGET[KEY];
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}
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`);
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const MISSING_PLUGIN_WARNING = `\
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WARNING: Dynamic import() transformation must be enabled using the
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@babel/plugin-transform-dynamic-import plugin. Babel 8 will
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no longer transform import() without using that plugin.
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`;
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const MISSING_PLUGIN_ERROR = `\
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ERROR: Dynamic import() transformation must be enabled using the
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@babel/plugin-transform-dynamic-import plugin. Babel 8
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no longer transforms import() without using that plugin.
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`;
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function getExportSpecifierName(node, stringSpecifiers) {
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if (node.type === "Identifier") {
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return node.name;
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} else if (node.type === "StringLiteral") {
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const stringValue = node.value;
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if (!(0, _helperValidatorIdentifier.isIdentifierName)(stringValue)) {
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stringSpecifiers.add(stringValue);
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}
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return stringValue;
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} else {
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throw new Error(`Expected export specifier to be either Identifier or StringLiteral, got ${node.type}`);
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}
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}
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function constructExportCall(path, exportIdent, exportNames, exportValues, exportStarTarget, stringSpecifiers) {
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const statements = [];
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if (!exportStarTarget) {
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if (exportNames.length === 1) {
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statements.push(_core.types.expressionStatement(_core.types.callExpression(exportIdent, [_core.types.stringLiteral(exportNames[0]), exportValues[0]])));
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} else {
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const objectProperties = [];
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for (let i = 0; i < exportNames.length; i++) {
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const exportName = exportNames[i];
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const exportValue = exportValues[i];
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objectProperties.push(_core.types.objectProperty(stringSpecifiers.has(exportName) ? _core.types.stringLiteral(exportName) : _core.types.identifier(exportName), exportValue));
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}
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statements.push(_core.types.expressionStatement(_core.types.callExpression(exportIdent, [_core.types.objectExpression(objectProperties)])));
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}
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} else {
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const exportObj = path.scope.generateUid("exportObj");
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statements.push(_core.types.variableDeclaration("var", [_core.types.variableDeclarator(_core.types.identifier(exportObj), _core.types.objectExpression([]))]));
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statements.push(buildExportAll({
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KEY: path.scope.generateUidIdentifier("key"),
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EXPORT_OBJ: _core.types.identifier(exportObj),
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TARGET: exportStarTarget
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}));
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for (let i = 0; i < exportNames.length; i++) {
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const exportName = exportNames[i];
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const exportValue = exportValues[i];
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statements.push(_core.types.expressionStatement(_core.types.assignmentExpression("=", _core.types.memberExpression(_core.types.identifier(exportObj), _core.types.identifier(exportName)), exportValue)));
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}
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statements.push(_core.types.expressionStatement(_core.types.callExpression(exportIdent, [_core.types.identifier(exportObj)])));
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}
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return statements;
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}
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var _default = exports.default = (0, _helperPluginUtils.declare)((api, options) => {
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api.assertVersion(7);
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const {
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systemGlobal = "System",
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allowTopLevelThis = false
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} = options;
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const reassignmentVisited = new WeakSet();
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const reassignmentVisitor = {
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"AssignmentExpression|UpdateExpression"(path) {
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if (reassignmentVisited.has(path.node)) return;
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reassignmentVisited.add(path.node);
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const arg = path.isAssignmentExpression() ? path.get("left") : path.get("argument");
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if (arg.isObjectPattern() || arg.isArrayPattern()) {
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const exprs = [path.node];
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for (const name of Object.keys(arg.getBindingIdentifiers())) {
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if (this.scope.getBinding(name) !== path.scope.getBinding(name)) {
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return;
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}
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const exportedNames = this.exports[name];
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if (!exportedNames) continue;
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for (const exportedName of exportedNames) {
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exprs.push(this.buildCall(exportedName, _core.types.identifier(name)).expression);
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}
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}
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path.replaceWith(_core.types.sequenceExpression(exprs));
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return;
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}
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if (!arg.isIdentifier()) return;
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const name = arg.node.name;
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if (this.scope.getBinding(name) !== path.scope.getBinding(name)) return;
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const exportedNames = this.exports[name];
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if (!exportedNames) return;
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let node = path.node;
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const isPostUpdateExpression = _core.types.isUpdateExpression(node, {
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prefix: false
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});
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if (isPostUpdateExpression) {
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node = _core.types.binaryExpression(node.operator[0], _core.types.unaryExpression("+", _core.types.cloneNode(node.argument)), _core.types.numericLiteral(1));
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}
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for (const exportedName of exportedNames) {
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node = this.buildCall(exportedName, node).expression;
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}
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if (isPostUpdateExpression) {
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node = _core.types.sequenceExpression([node, path.node]);
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}
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path.replaceWith(node);
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}
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};
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return {
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name: "transform-modules-systemjs",
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pre() {
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this.file.set("@babel/plugin-transform-modules-*", "systemjs");
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},
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visitor: {
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["CallExpression" + (api.types.importExpression ? "|ImportExpression" : "")](path, state) {
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if (path.isCallExpression() && !_core.types.isImport(path.node.callee)) return;
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if (path.isCallExpression()) {
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if (!this.file.has("@babel/plugin-proposal-dynamic-import")) {
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{
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console.warn(MISSING_PLUGIN_WARNING);
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}
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}
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} else {
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if (!this.file.has("@babel/plugin-proposal-dynamic-import")) {
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throw new Error(MISSING_PLUGIN_ERROR);
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}
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}
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path.replaceWith((0, _helperModuleTransforms.buildDynamicImport)(path.node, false, true, specifier => _core.types.callExpression(_core.types.memberExpression(_core.types.identifier(state.contextIdent), _core.types.identifier("import")), [specifier])));
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},
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MetaProperty(path, state) {
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if (path.node.meta.name === "import" && path.node.property.name === "meta") {
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path.replaceWith(_core.types.memberExpression(_core.types.identifier(state.contextIdent), _core.types.identifier("meta")));
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}
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},
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ReferencedIdentifier(path, state) {
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if (path.node.name === "__moduleName" && !path.scope.hasBinding("__moduleName")) {
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path.replaceWith(_core.types.memberExpression(_core.types.identifier(state.contextIdent), _core.types.identifier("id")));
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}
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},
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Program: {
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enter(path, state) {
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state.contextIdent = path.scope.generateUid("context");
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state.stringSpecifiers = new Set();
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if (!allowTopLevelThis) {
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(0, _helperModuleTransforms.rewriteThis)(path);
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}
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},
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exit(path, state) {
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const scope = path.scope;
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const exportIdent = scope.generateUid("export");
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const {
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contextIdent,
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stringSpecifiers
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} = state;
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const exportMap = Object.create(null);
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const modules = [];
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const beforeBody = [];
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const setters = [];
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const sources = [];
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const variableIds = [];
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const removedPaths = [];
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function addExportName(key, val) {
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exportMap[key] = exportMap[key] || [];
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exportMap[key].push(val);
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}
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function pushModule(source, key, specifiers) {
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let module;
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modules.forEach(function (m) {
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if (m.key === source) {
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module = m;
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}
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});
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if (!module) {
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modules.push(module = {
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key: source,
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imports: [],
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exports: []
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});
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}
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module[key] = module[key].concat(specifiers);
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}
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function buildExportCall(name, val) {
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return _core.types.expressionStatement(_core.types.callExpression(_core.types.identifier(exportIdent), [_core.types.stringLiteral(name), val]));
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}
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const exportNames = [];
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const exportValues = [];
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const body = path.get("body");
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for (const path of body) {
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if (path.isFunctionDeclaration()) {
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beforeBody.push(path.node);
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removedPaths.push(path);
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} else if (path.isClassDeclaration()) {
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variableIds.push(_core.types.cloneNode(path.node.id));
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path.replaceWith(_core.types.expressionStatement(_core.types.assignmentExpression("=", _core.types.cloneNode(path.node.id), _core.types.toExpression(path.node))));
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} else if (path.isVariableDeclaration()) {
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path.node.kind = "var";
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} else if (path.isImportDeclaration()) {
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const source = path.node.source.value;
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pushModule(source, "imports", path.node.specifiers);
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for (const name of Object.keys(path.getBindingIdentifiers())) {
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scope.removeBinding(name);
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variableIds.push(_core.types.identifier(name));
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}
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path.remove();
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} else if (path.isExportAllDeclaration()) {
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pushModule(path.node.source.value, "exports", path.node);
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path.remove();
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} else if (path.isExportDefaultDeclaration()) {
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const declar = path.node.declaration;
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if (_core.types.isClassDeclaration(declar)) {
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const id = declar.id;
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if (id) {
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exportNames.push("default");
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exportValues.push(scope.buildUndefinedNode());
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variableIds.push(_core.types.cloneNode(id));
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addExportName(id.name, "default");
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path.replaceWith(_core.types.expressionStatement(_core.types.assignmentExpression("=", _core.types.cloneNode(id), _core.types.toExpression(declar))));
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} else {
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exportNames.push("default");
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exportValues.push(_core.types.toExpression(declar));
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removedPaths.push(path);
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}
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} else if (_core.types.isFunctionDeclaration(declar)) {
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const id = declar.id;
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if (id) {
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beforeBody.push(declar);
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exportNames.push("default");
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exportValues.push(_core.types.cloneNode(id));
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addExportName(id.name, "default");
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} else {
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exportNames.push("default");
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exportValues.push(_core.types.toExpression(declar));
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}
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removedPaths.push(path);
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} else {
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path.replaceWith(buildExportCall("default", declar));
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}
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} else if (path.isExportNamedDeclaration()) {
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const declar = path.node.declaration;
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if (declar) {
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path.replaceWith(declar);
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if (_core.types.isFunction(declar)) {
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const name = declar.id.name;
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addExportName(name, name);
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beforeBody.push(declar);
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exportNames.push(name);
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exportValues.push(_core.types.cloneNode(declar.id));
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removedPaths.push(path);
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} else if (_core.types.isClass(declar)) {
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const name = declar.id.name;
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exportNames.push(name);
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exportValues.push(scope.buildUndefinedNode());
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variableIds.push(_core.types.cloneNode(declar.id));
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path.replaceWith(_core.types.expressionStatement(_core.types.assignmentExpression("=", _core.types.cloneNode(declar.id), _core.types.toExpression(declar))));
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addExportName(name, name);
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} else {
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if (_core.types.isVariableDeclaration(declar)) {
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declar.kind = "var";
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}
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for (const name of Object.keys(_core.types.getBindingIdentifiers(declar))) {
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addExportName(name, name);
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}
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}
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} else {
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const specifiers = path.node.specifiers;
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if (specifiers != null && specifiers.length) {
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if (path.node.source) {
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pushModule(path.node.source.value, "exports", specifiers);
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path.remove();
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} else {
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const nodes = [];
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for (const specifier of specifiers) {
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const {
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local,
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exported
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} = specifier;
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const binding = scope.getBinding(local.name);
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const exportedName = getExportSpecifierName(exported, stringSpecifiers);
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if (binding && _core.types.isFunctionDeclaration(binding.path.node)) {
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exportNames.push(exportedName);
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exportValues.push(_core.types.cloneNode(local));
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} else if (!binding) {
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nodes.push(buildExportCall(exportedName, local));
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}
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addExportName(local.name, exportedName);
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}
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path.replaceWithMultiple(nodes);
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}
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} else {
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path.remove();
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}
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}
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}
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}
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modules.forEach(function (specifiers) {
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const setterBody = [];
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const target = scope.generateUid(specifiers.key);
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for (let specifier of specifiers.imports) {
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if (_core.types.isImportNamespaceSpecifier(specifier)) {
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setterBody.push(_core.types.expressionStatement(_core.types.assignmentExpression("=", specifier.local, _core.types.identifier(target))));
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} else if (_core.types.isImportDefaultSpecifier(specifier)) {
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specifier = _core.types.importSpecifier(specifier.local, _core.types.identifier("default"));
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}
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if (_core.types.isImportSpecifier(specifier)) {
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const {
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imported
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} = specifier;
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setterBody.push(_core.types.expressionStatement(_core.types.assignmentExpression("=", specifier.local, _core.types.memberExpression(_core.types.identifier(target), specifier.imported, imported.type === "StringLiteral"))));
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}
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}
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if (specifiers.exports.length) {
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const exportNames = [];
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const exportValues = [];
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let hasExportStar = false;
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for (const node of specifiers.exports) {
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if (_core.types.isExportAllDeclaration(node)) {
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hasExportStar = true;
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} else if (_core.types.isExportSpecifier(node)) {
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const exportedName = getExportSpecifierName(node.exported, stringSpecifiers);
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exportNames.push(exportedName);
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exportValues.push(_core.types.memberExpression(_core.types.identifier(target), node.local, _core.types.isStringLiteral(node.local)));
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} else {}
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}
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setterBody.push(...constructExportCall(path, _core.types.identifier(exportIdent), exportNames, exportValues, hasExportStar ? _core.types.identifier(target) : null, stringSpecifiers));
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}
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sources.push(_core.types.stringLiteral(specifiers.key));
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setters.push(_core.types.functionExpression(null, [_core.types.identifier(target)], _core.types.blockStatement(setterBody)));
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});
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let moduleName = (0, _helperModuleTransforms.getModuleName)(this.file.opts, options);
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if (moduleName) moduleName = _core.types.stringLiteral(moduleName);
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{
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var _path$scope, _path$scope$hoistVari;
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(_path$scope$hoistVari = (_path$scope = path.scope).hoistVariables) != null ? _path$scope$hoistVari : _path$scope.hoistVariables = require("@babel/traverse").Scope.prototype.hoistVariables;
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}
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path.scope.hoistVariables((id, hasInit) => {
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variableIds.push(id);
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if (!hasInit && id.name in exportMap) {
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for (const exported of exportMap[id.name]) {
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exportNames.push(exported);
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exportValues.push(_core.types.buildUndefinedNode());
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}
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}
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});
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if (variableIds.length) {
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beforeBody.unshift(_core.types.variableDeclaration("var", variableIds.map(id => _core.types.variableDeclarator(id))));
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}
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if (exportNames.length) {
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beforeBody.push(...constructExportCall(path, _core.types.identifier(exportIdent), exportNames, exportValues, null, stringSpecifiers));
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}
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path.traverse(reassignmentVisitor, {
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exports: exportMap,
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buildCall: buildExportCall,
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scope
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});
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for (const path of removedPaths) {
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path.remove();
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}
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let hasTLA = false;
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path.traverse({
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AwaitExpression(path) {
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hasTLA = true;
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path.stop();
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},
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Function(path) {
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path.skip();
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},
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noScope: true
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});
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path.node.body = [buildTemplate({
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SYSTEM_REGISTER: _core.types.memberExpression(_core.types.identifier(systemGlobal), _core.types.identifier("register")),
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BEFORE_BODY: beforeBody,
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MODULE_NAME: moduleName,
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SETTERS: _core.types.arrayExpression(setters),
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EXECUTE: _core.types.functionExpression(null, [], _core.types.blockStatement(path.node.body), false, hasTLA),
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SOURCES: _core.types.arrayExpression(sources),
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EXPORT_IDENTIFIER: _core.types.identifier(exportIdent),
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CONTEXT_IDENTIFIER: _core.types.identifier(contextIdent)
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})];
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path.requeue(path.get("body.0"));
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}
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}
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}
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};
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});
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//# sourceMappingURL=index.js.map
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