usage-plugin.js
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"use strict";
Object.defineProperty(exports, "__esModule", {
value: true
});
exports.default = _default;
var _data = _interopRequireDefault(require("core-js-compat/data"));
var _shippedProposals = _interopRequireDefault(require("./shipped-proposals"));
var _getModulesListForTargetVersion = _interopRequireDefault(require("core-js-compat/get-modules-list-for-target-version"));
var _helperCompilationTargets = require("@babel/helper-compilation-targets");
var _builtInDefinitions = require("./built-in-definitions");
var _utils = require("../../utils");
var _debug = require("../../debug");
function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }
const NO_DIRECT_POLYFILL_IMPORT = `
When setting \`useBuiltIns: 'usage'\`, polyfills are automatically imported when needed.
Please remove the direct import of \`core-js\` or use \`useBuiltIns: 'entry'\` instead.`;
const corejs3PolyfillsWithoutProposals = Object.keys(_data.default).filter(name => !name.startsWith("esnext.")).reduce((memo, key) => {
memo[key] = _data.default[key];
return memo;
}, {});
const corejs3PolyfillsWithShippedProposals = _shippedProposals.default.reduce((memo, key) => {
memo[key] = _data.default[key];
return memo;
}, Object.assign({}, corejs3PolyfillsWithoutProposals));
function _default(_, {
corejs,
include,
exclude,
polyfillTargets,
proposals,
shippedProposals,
debug
}) {
const polyfills = (0, _helperCompilationTargets.filterItems)(proposals ? _data.default : shippedProposals ? corejs3PolyfillsWithShippedProposals : corejs3PolyfillsWithoutProposals, include, exclude, polyfillTargets, null);
const available = new Set((0, _getModulesListForTargetVersion.default)(corejs.version));
function resolveKey(path, computed) {
const {
node,
parent,
scope
} = path;
if (path.isStringLiteral()) return node.value;
const {
name
} = node;
const isIdentifier = path.isIdentifier();
if (isIdentifier && !(computed || parent.computed)) return name;
if (!isIdentifier || scope.getBindingIdentifier(name)) {
const {
value
} = path.evaluate();
if (typeof value === "string") return value;
}
}
function resolveSource(path) {
const {
node,
scope
} = path;
let builtIn, instanceType;
if (node) {
builtIn = node.name;
if (!path.isIdentifier() || scope.getBindingIdentifier(builtIn)) {
const {
deopt,
value
} = path.evaluate();
if (value !== undefined) {
instanceType = (0, _utils.getType)(value);
} else if (deopt && deopt.isIdentifier()) {
builtIn = deopt.node.name;
}
}
}
return {
builtIn,
instanceType,
isNamespaced: (0, _utils.isNamespaced)(path)
};
}
const addAndRemovePolyfillImports = {
ImportDeclaration(path) {
if ((0, _utils.isPolyfillSource)((0, _utils.getImportSource)(path))) {
console.warn(NO_DIRECT_POLYFILL_IMPORT);
path.remove();
}
},
Program: {
enter(path) {
path.get("body").forEach(bodyPath => {
if ((0, _utils.isPolyfillSource)((0, _utils.getRequireSource)(bodyPath))) {
console.warn(NO_DIRECT_POLYFILL_IMPORT);
bodyPath.remove();
}
});
},
exit(path) {
const filtered = (0, _utils.intersection)(polyfills, this.polyfillsSet, available);
const reversed = Array.from(filtered).reverse();
for (const module of reversed) {
if (!this.injectedPolyfills.has(module)) {
(0, _utils.createImport)(path, module);
}
}
filtered.forEach(module => this.injectedPolyfills.add(module));
}
},
Import() {
this.addUnsupported(_builtInDefinitions.PromiseDependencies);
},
Function({
node
}) {
if (node.async) {
this.addUnsupported(_builtInDefinitions.PromiseDependencies);
}
},
"ForOfStatement|ArrayPattern"() {
this.addUnsupported(_builtInDefinitions.CommonIterators);
},
SpreadElement({
parentPath
}) {
if (!parentPath.isObjectExpression()) {
this.addUnsupported(_builtInDefinitions.CommonIterators);
}
},
YieldExpression({
node
}) {
if (node.delegate) {
this.addUnsupported(_builtInDefinitions.CommonIterators);
}
},
ReferencedIdentifier({
node: {
name
},
scope
}) {
if (scope.getBindingIdentifier(name)) return;
this.addBuiltInDependencies(name);
},
MemberExpression(path) {
const source = resolveSource(path.get("object"));
const key = resolveKey(path.get("property"));
this.addPropertyDependencies(source, key);
},
ObjectPattern(path) {
const {
parentPath,
parent,
key
} = path;
let source;
if (parentPath.isVariableDeclarator()) {
source = resolveSource(parentPath.get("init"));
} else if (parentPath.isAssignmentExpression()) {
source = resolveSource(parentPath.get("right"));
} else if (parentPath.isFunctionExpression()) {
const grand = parentPath.parentPath;
if (grand.isCallExpression() || grand.isNewExpression()) {
if (grand.node.callee === parent) {
source = resolveSource(grand.get("arguments")[key]);
}
}
}
for (const property of path.get("properties")) {
if (property.isObjectProperty()) {
const key = resolveKey(property.get("key"));
this.addPropertyDependencies(source, key);
}
}
},
BinaryExpression(path) {
if (path.node.operator !== "in") return;
const source = resolveSource(path.get("right"));
const key = resolveKey(path.get("left"), true);
this.addPropertyDependencies(source, key);
}
};
return {
name: "corejs3-usage",
pre() {
this.injectedPolyfills = new Set();
this.polyfillsSet = new Set();
this.addUnsupported = function (builtIn) {
const modules = Array.isArray(builtIn) ? builtIn : [builtIn];
for (const module of modules) {
this.polyfillsSet.add(module);
}
};
this.addBuiltInDependencies = function (builtIn) {
if ((0, _utils.has)(_builtInDefinitions.BuiltIns, builtIn)) {
const BuiltInDependencies = _builtInDefinitions.BuiltIns[builtIn];
this.addUnsupported(BuiltInDependencies);
}
};
this.addPropertyDependencies = function (source = {}, key) {
const {
builtIn,
instanceType,
isNamespaced
} = source;
if (isNamespaced) return;
if (_builtInDefinitions.PossibleGlobalObjects.has(builtIn)) {
this.addBuiltInDependencies(key);
} else if ((0, _utils.has)(_builtInDefinitions.StaticProperties, builtIn)) {
const BuiltInProperties = _builtInDefinitions.StaticProperties[builtIn];
if ((0, _utils.has)(BuiltInProperties, key)) {
const StaticPropertyDependencies = BuiltInProperties[key];
return this.addUnsupported(StaticPropertyDependencies);
}
}
if (!(0, _utils.has)(_builtInDefinitions.InstanceProperties, key)) return;
let InstancePropertyDependencies = _builtInDefinitions.InstanceProperties[key];
if (instanceType) {
InstancePropertyDependencies = InstancePropertyDependencies.filter(m => m.includes(instanceType) || _builtInDefinitions.CommonInstanceDependencies.has(m));
}
this.addUnsupported(InstancePropertyDependencies);
};
},
post() {
if (debug) {
(0, _debug.logUsagePolyfills)(this.injectedPolyfills, this.file.opts.filename, polyfillTargets, _data.default);
}
},
visitor: addAndRemovePolyfillImports
};
}