1 | "use strict";
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2 |
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3 | Object.defineProperty(exports, "__esModule", {
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4 | value: true
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5 | });
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6 | exports.importAssertions = importAssertions;
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7 |
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8 | var _acorn = _interopRequireWildcard(require("acorn"));
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9 |
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10 | function _getRequireWildcardCache(nodeInterop) { if (typeof WeakMap !== "function") return null; var cacheBabelInterop = new WeakMap(); var cacheNodeInterop = new WeakMap(); return (_getRequireWildcardCache = function (nodeInterop) { return nodeInterop ? cacheNodeInterop : cacheBabelInterop; })(nodeInterop); }
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11 |
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12 | function _interopRequireWildcard(obj, nodeInterop) { if (!nodeInterop && obj && obj.__esModule) { return obj; } if (obj === null || typeof obj !== "object" && typeof obj !== "function") { return { default: obj }; } var cache = _getRequireWildcardCache(nodeInterop); if (cache && cache.has(obj)) { return cache.get(obj); } var newObj = {}; var hasPropertyDescriptor = Object.defineProperty && Object.getOwnPropertyDescriptor; for (var key in obj) { if (key !== "default" && 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; }
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13 |
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14 | const leftCurlyBrace = "{".charCodeAt(0);
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15 | const space = " ".charCodeAt(0);
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16 | const keyword = "assert";
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17 | const FUNC_STATEMENT = 1,
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18 | FUNC_HANGING_STATEMENT = 2,
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19 | FUNC_NULLABLE_ID = 4;
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20 |
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21 | function importAssertions(Parser) {
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22 | // Use supplied version acorn version if present, to avoid
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23 | // reference mismatches due to different acorn versions. This
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24 | // allows this plugin to be used with Rollup which supplies
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25 | // its own internal version of acorn and thereby sidesteps
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26 | // the package manager.
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27 | const acorn = Parser.acorn || _acorn;
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28 | const {
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29 | tokTypes: tt,
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30 | TokenType
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31 | } = acorn;
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32 | return class extends Parser {
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33 | constructor(...args) {
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34 | super(...args);
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35 | this.assertToken = new TokenType(keyword);
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36 | }
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37 |
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38 | _codeAt(i) {
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39 | return this.input.charCodeAt(i);
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40 | }
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41 |
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42 | _eat(t) {
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43 | if (this.type !== t) {
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44 | this.unexpected();
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45 | }
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46 |
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47 | this.next();
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48 | }
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49 |
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50 | readToken(code) {
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51 | let i = 0;
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52 |
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53 | for (; i < keyword.length; i++) {
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54 | if (this._codeAt(this.pos + i) !== keyword.charCodeAt(i)) {
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55 | return super.readToken(code);
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56 | }
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57 | } // ensure that the keyword is at the correct location
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58 | // ie `assert{...` or `assert {...`
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59 |
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60 |
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61 | for (;; i++) {
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62 | if (this._codeAt(this.pos + i) === leftCurlyBrace) {
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63 | // Found '{'
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64 | break;
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65 | } else if (this._codeAt(this.pos + i) === space) {
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66 | // white space is allowed between `assert` and `{`, so continue.
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67 | continue;
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68 | } else {
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69 | return super.readToken(code);
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70 | }
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71 | } // If we're inside a dynamic import expression we'll parse
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72 | // the `assert` keyword as a standard object property name
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73 | // ie `import(""./foo.json", { assert: { type: "json" } })`
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74 |
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75 |
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76 | if (this.type.label === "{") {
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77 | return super.readToken(code);
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78 | }
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79 |
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80 | this.pos += keyword.length;
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81 | return this.finishToken(this.assertToken);
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82 | }
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83 |
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84 | parseDynamicImport(node) {
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85 | this.next(); // skip `(`
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86 | // Parse node.source.
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87 |
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88 | node.source = this.parseMaybeAssign();
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89 |
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90 | if (this.eat(tt.comma)) {
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91 | const obj = this.parseObj(false);
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92 | node.arguments = [obj];
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93 | }
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94 |
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95 | this._eat(tt.parenR);
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96 |
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97 | return this.finishNode(node, "ImportExpression");
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98 | } // ported from acorn/src/statement.js pp.parseExport
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99 |
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100 |
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101 | parseExport(node, exports) {
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102 | this.next(); // export * from '...'
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103 |
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104 | if (this.eat(tt.star)) {
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105 | if (this.options.ecmaVersion >= 11) {
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106 | if (this.eatContextual("as")) {
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107 | node.exported = this.parseIdent(true);
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108 | this.checkExport(exports, node.exported.name, this.lastTokStart);
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109 | } else {
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110 | node.exported = null;
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111 | }
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112 | }
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113 |
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114 | this.expectContextual("from");
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115 |
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116 | if (this.type !== tt.string) {
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117 | this.unexpected();
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118 | }
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119 |
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120 | node.source = this.parseExprAtom();
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121 |
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122 | if (this.type === this.assertToken) {
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123 | this.next();
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124 | const assertions = this.parseImportAssertions();
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125 |
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126 | if (assertions) {
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127 | node.assertions = assertions;
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128 | }
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129 | }
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130 |
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131 | this.semicolon();
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132 | return this.finishNode(node, "ExportAllDeclaration");
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133 | }
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134 |
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135 | if (this.eat(tt._default)) {
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136 | // export default ...
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137 | this.checkExport(exports, "default", this.lastTokStart);
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138 | var isAsync;
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139 |
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140 | if (this.type === tt._function || (isAsync = this.isAsyncFunction())) {
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141 | var fNode = this.startNode();
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142 | this.next();
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143 |
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144 | if (isAsync) {
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145 | this.next();
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146 | }
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147 |
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148 | node.declaration = this.parseFunction(fNode, FUNC_STATEMENT | FUNC_NULLABLE_ID, false, isAsync);
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149 | } else if (this.type === tt._class) {
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150 | var cNode = this.startNode();
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151 | node.declaration = this.parseClass(cNode, "nullableID");
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152 | } else {
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153 | node.declaration = this.parseMaybeAssign();
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154 | this.semicolon();
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155 | }
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156 |
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157 | return this.finishNode(node, "ExportDefaultDeclaration");
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158 | } // export var|const|let|function|class ...
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159 |
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160 |
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161 | if (this.shouldParseExportStatement()) {
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162 | node.declaration = this.parseStatement(null);
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163 |
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164 | if (node.declaration.type === "VariableDeclaration") {
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165 | this.checkVariableExport(exports, node.declaration.declarations);
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166 | } else {
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167 | this.checkExport(exports, node.declaration.id.name, node.declaration.id.start);
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168 | }
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169 |
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170 | node.specifiers = [];
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171 | node.source = null;
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172 | } else {
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173 | // export { x, y as z } [from '...']
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174 | node.declaration = null;
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175 | node.specifiers = this.parseExportSpecifiers(exports);
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176 |
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177 | if (this.eatContextual("from")) {
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178 | if (this.type !== tt.string) {
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179 | this.unexpected();
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180 | }
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181 |
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182 | node.source = this.parseExprAtom();
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183 |
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184 | if (this.type === this.assertToken) {
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185 | this.next();
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186 | const assertions = this.parseImportAssertions();
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187 |
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188 | if (assertions) {
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189 | node.assertions = assertions;
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190 | }
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191 | }
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192 | } else {
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193 | for (var i = 0, list = node.specifiers; i < list.length; i += 1) {
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194 | // check for keywords used as local names
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195 | var spec = list[i];
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196 | this.checkUnreserved(spec.local); // check if export is defined
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197 |
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198 | this.checkLocalExport(spec.local);
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199 | }
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200 |
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201 | node.source = null;
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202 | }
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203 |
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204 | this.semicolon();
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205 | }
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206 |
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207 | return this.finishNode(node, "ExportNamedDeclaration");
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208 | }
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209 |
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210 | parseImport(node) {
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211 | this.next(); // import '...'
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212 |
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213 | if (this.type === tt.string) {
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214 | node.specifiers = [];
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215 | node.source = this.parseExprAtom();
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216 | } else {
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217 | node.specifiers = this.parseImportSpecifiers();
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218 | this.expectContextual("from");
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219 | node.source = this.type === tt.string ? this.parseExprAtom() : this.unexpected();
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220 | }
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221 |
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222 | if (this.type === this.assertToken) {
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223 | this.next();
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224 | const assertions = this.parseImportAssertions();
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225 |
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226 | if (assertions) {
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227 | node.assertions = assertions;
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228 | }
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229 | }
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230 |
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231 | this.semicolon();
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232 | return this.finishNode(node, "ImportDeclaration");
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233 | }
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234 |
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235 | parseImportAssertions() {
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236 | this._eat(tt.braceL);
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237 |
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238 | const attrs = this.parseAssertEntries();
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239 |
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240 | this._eat(tt.braceR);
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241 |
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242 | return attrs;
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243 | }
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244 |
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245 | parseAssertEntries() {
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246 | const attrs = [];
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247 | const attrNames = new Set();
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248 |
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249 | do {
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250 | if (this.type === tt.braceR) {
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251 | break;
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252 | }
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253 |
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254 | const node = this.startNode(); // parse AssertionKey : IdentifierName, StringLiteral
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255 |
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256 | let assertionKeyNode;
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257 |
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258 | if (this.type === tt.string) {
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259 | assertionKeyNode = this.parseLiteral(this.value);
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260 | } else {
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261 | assertionKeyNode = this.parseIdent(true);
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262 | }
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263 |
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264 | this.next();
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265 | node.key = assertionKeyNode; // check if we already have an entry for an attribute
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266 | // if a duplicate entry is found, throw an error
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267 | // for now this logic will come into play only when someone declares `type` twice
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268 |
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269 | if (attrNames.has(node.key.name)) {
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270 | this.raise(this.pos, "Duplicated key in assertions");
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271 | }
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272 |
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273 | attrNames.add(node.key.name);
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274 |
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275 | if (this.type !== tt.string) {
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276 | this.raise(this.pos, "Only string is supported as an assertion value");
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277 | }
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278 |
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279 | node.value = this.parseLiteral(this.value);
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280 | attrs.push(this.finishNode(node, "ImportAttribute"));
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281 | } while (this.eat(tt.comma));
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282 |
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283 | return attrs;
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284 | }
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285 |
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286 | };
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287 | } |
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