87 lines
2.8 KiB
JavaScript
87 lines
2.8 KiB
JavaScript
"use strict";
|
|
|
|
exports.__esModule = true;
|
|
|
|
exports.default = function (_ref) {
|
|
var t = _ref.types;
|
|
|
|
function createImportDeclaration(polyfill) {
|
|
var declar = t.importDeclaration([], t.stringLiteral(polyfill));
|
|
declar._blockHoist = 3;
|
|
return declar;
|
|
}
|
|
|
|
function createRequireStatement(polyfill) {
|
|
return t.expressionStatement(t.callExpression(t.identifier("require"), [t.stringLiteral(polyfill)]));
|
|
}
|
|
|
|
function isRequire(path) {
|
|
return t.isExpressionStatement(path.node) && t.isCallExpression(path.node.expression) && t.isIdentifier(path.node.expression.callee) && path.node.expression.callee.name === "require" && path.node.expression.arguments.length === 1 && t.isStringLiteral(path.node.expression.arguments[0]) && isPolyfillSource(path.node.expression.arguments[0].value);
|
|
}
|
|
|
|
function createImport(polyfill, requireType, core) {
|
|
if (core) {
|
|
polyfill = "core-js/modules/" + polyfill;
|
|
}
|
|
|
|
if (requireType === "import") {
|
|
return createImportDeclaration(polyfill);
|
|
} else {
|
|
return createRequireStatement(polyfill);
|
|
}
|
|
}
|
|
|
|
function createImports(polyfills, requireType, regenerator) {
|
|
var imports = polyfills.filter(function (el, i, arr) {
|
|
return arr.indexOf(el) === i;
|
|
}).map(function (polyfill) {
|
|
return createImport(polyfill, requireType, true);
|
|
});
|
|
|
|
return [].concat(imports, [regenerator && createImport("regenerator-runtime/runtime", requireType)]).filter(Boolean);
|
|
}
|
|
|
|
var isPolyfillImport = {
|
|
ImportDeclaration: function ImportDeclaration(path, state) {
|
|
if (path.node.specifiers.length === 0 && isPolyfillSource(path.node.source.value)) {
|
|
this.numPolyfillImports++;
|
|
if (this.numPolyfillImports > 1) {
|
|
path.remove();
|
|
return;
|
|
}
|
|
|
|
path.replaceWithMultiple(createImports(state.opts.polyfills, "import", state.opts.regenerator));
|
|
}
|
|
},
|
|
Program: function Program(path, state) {
|
|
var _this = this;
|
|
|
|
if (!state.opts.polyfills) {
|
|
throw path.buildCodeFrameError("\nThere was an issue in \"babel-preset-env\" such that\nthe \"polyfills\" option was not correctly passed\nto the \"transform-polyfill-require\" plugin\n");
|
|
}
|
|
path.get("body").forEach(function (bodyPath) {
|
|
if (isRequire(bodyPath)) {
|
|
_this.numPolyfillImports++;
|
|
if (_this.numPolyfillImports > 1) {
|
|
path.remove();
|
|
return;
|
|
}
|
|
|
|
bodyPath.replaceWithMultiple(createImports(state.opts.polyfills, "require", state.opts.regenerator));
|
|
}
|
|
});
|
|
}
|
|
};
|
|
|
|
return {
|
|
name: "transform-polyfill-require",
|
|
visitor: isPolyfillImport,
|
|
pre: function pre() {
|
|
this.numPolyfillImports = 0;
|
|
}
|
|
};
|
|
};
|
|
|
|
function isPolyfillSource(value) {
|
|
return value === "babel-polyfill" || value === "core-js";
|
|
} |