103 lines
3.1 KiB
JavaScript
103 lines
3.1 KiB
JavaScript
"use strict";
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module.exports = CommonJSFormatter;
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var DefaultFormatter = require("./_default");
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var traverse = require("../../traverse");
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var util = require("../../util");
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var t = require("../../types");
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var _ = require("lodash");
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var visitor = {
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enter: function (node, parent, scope, context, state) {
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if (t.isExportDeclaration(node) && !node.default) state.hasNonDefaultExports = true;
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}
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};
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function CommonJSFormatter(file) {
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DefaultFormatter.apply(this, arguments);
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var state = { hasNonDefaultExports: false };
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traverse(file.ast, visitor, file.scope, state);
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this.insertedModuleDeclaration = false;
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this.hasNonDefaultExports = state.hasNonDefaultExports;
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}
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util.inherits(CommonJSFormatter, DefaultFormatter);
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CommonJSFormatter.prototype.importSpecifier = function (specifier, node, nodes) {
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var variableName = t.getSpecifierName(specifier);
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// import foo from "foo";
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if (t.isSpecifierDefault(specifier)) {
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var ref = util.template("require", {
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MODULE_NAME: node.source
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});
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if (!_.contains(this.file.dynamicImported, node)) {
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ref = t.callExpression(this.file.addHelper("interop-require"), [ref]);
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}
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nodes.push(t.variableDeclaration("var", [t.variableDeclarator(variableName, ref)]));
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} else {
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if (specifier.type === "ImportBatchSpecifier") {
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// import * as bar from "foo";
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nodes.push(t.variableDeclaration("var", [
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t.variableDeclarator(
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variableName,
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t.callExpression(this.file.addHelper("interop-require-wildcard"), [
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t.callExpression(t.identifier("require"), [node.source])
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])
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)
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]));
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} else {
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// import foo from "foo";
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nodes.push(util.template("require-assign-key", {
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VARIABLE_NAME: variableName,
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MODULE_NAME: node.source,
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KEY: t.getSpecifierId(specifier)
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}));
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}
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}
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};
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CommonJSFormatter.prototype.importDeclaration = function (node, nodes) {
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// import "foo";
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nodes.push(util.template("require", {
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MODULE_NAME: node.source
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}, true));
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};
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CommonJSFormatter.prototype.exportDeclaration = function (node, nodes) {
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if (node.default && !this.noInteropRequire) {
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var declar = node.declaration;
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var assign;
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if (this.hasNonDefaultExports) {
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if (!this.insertedModuleDeclaration) {
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nodes.push(util.template("exports-module-declaration", true));
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this.insertedModuleDeclaration = true;
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}
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} else {
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var assign = util.template("exports-default-assign", {
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VALUE: this._pushStatement(declar, nodes)
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}, true);
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if (t.isFunctionDeclaration(declar)) {
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// we can hoist this assignment to the top of the file
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assign._blockHoist = 3;
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}
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nodes.push(assign);
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return;
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}
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}
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DefaultFormatter.prototype.exportDeclaration.apply(this, arguments);
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};
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CommonJSFormatter.prototype.exportSpecifier = function (specifier, node, nodes) {
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this._exportSpecifier(function () {
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return t.callExpression(t.identifier("require"), [node.source]);
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}, specifier, node, nodes);
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};
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