96 lines
2.7 KiB
JavaScript
96 lines
2.7 KiB
JavaScript
"use strict";
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module.exports = CommonJSFormatter;
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var DefaultFormatter = require("./_default");
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var util = require("../../util");
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var t = require("../../types");
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var contains = require("lodash/collection/contains");
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function CommonJSFormatter(file) {
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DefaultFormatter.apply(this, arguments);
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}
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util.inherits(CommonJSFormatter, DefaultFormatter);
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CommonJSFormatter.prototype.init = function () {
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if (this.hasNonDefaultExports) {
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this.file.ast.program.body.push(util.template("exports-module-declaration", true));
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}
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};
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CommonJSFormatter.prototype.importSpecifier = function (specifier, node, nodes) {
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var variableName = t.getSpecifierName(specifier);
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var ref = this.getExternalReference(node, nodes);
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// import foo from "foo";
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if (t.isSpecifierDefault(specifier)) {
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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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ref
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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(t.variableDeclaration("var", [
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t.variableDeclarator(
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variableName,
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t.memberExpression(ref, t.getSpecifierId(specifier))
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)
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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 (this.doDefaultExportInterop(node)) {
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var declar = node.declaration;
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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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DefaultFormatter.prototype.exportDeclaration.apply(this, arguments);
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};
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CommonJSFormatter.prototype._getExternalReference = function (node, nodes) {
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var source = node.source.value;
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var call = t.callExpression(t.identifier("require"), [node.source]);
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if (this.localImportOccurences[source] > 1) {
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var uid = this.file.generateUidIdentifier(source);
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nodes.push(t.variableDeclaration("var", [
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t.variableDeclarator(uid, call)
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]));
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return uid;
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} else {
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return call;
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}
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};
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