$

node_modules/@babel/preset-env/lib/polyfills/babel-polyfill.js

@@ -0,0 +1,75 @@
+"use strict";
+
+Object.defineProperty(exports, "__esModule", {
+  value: true
+});
+exports.default = _default;
+
+var _utils = require("./utils");
+
+const BABEL_POLYFILL_DEPRECATION = `
+  \`@babel/polyfill\` is deprecated. Please, use required parts of \`core-js\`
+  and \`regenerator-runtime/runtime\` separately`;
+const NO_DIRECT_POLYFILL_IMPORT = `
+  When setting \`useBuiltIns: 'usage'\`, polyfills are automatically imported when needed.
+  Please remove the direct import of \`SPECIFIER\` or use \`useBuiltIns: 'entry'\` instead.`;
+
+function _default({
+  template
+}, {
+  regenerator,
+  deprecated,
+  usage
+}) {
+  return {
+    name: "preset-env/replace-babel-polyfill",
+    visitor: {
+      ImportDeclaration(path) {
+        const src = (0, _utils.getImportSource)(path);
+
+        if (usage && (0, _utils.isPolyfillSource)(src)) {
+          console.warn(NO_DIRECT_POLYFILL_IMPORT.replace("SPECIFIER", src));
+          if (!deprecated) path.remove();
+        } else if (src === "@babel/polyfill") {
+          if (deprecated) {
+            console.warn(BABEL_POLYFILL_DEPRECATION);
+          } else if (regenerator) {
+            path.replaceWithMultiple(template.ast`
+              import "core-js";
+              import "regenerator-runtime/runtime.js";
+            `);
+          } else {
+            path.replaceWith(template.ast`
+              import "core-js";
+            `);
+          }
+        }
+      },
+
+      Program(path) {
+        path.get("body").forEach(bodyPath => {
+          const src = (0, _utils.getRequireSource)(bodyPath);
+
+          if (usage && (0, _utils.isPolyfillSource)(src)) {
+            console.warn(NO_DIRECT_POLYFILL_IMPORT.replace("SPECIFIER", src));
+            if (!deprecated) bodyPath.remove();
+          } else if (src === "@babel/polyfill") {
+            if (deprecated) {
+              console.warn(BABEL_POLYFILL_DEPRECATION);
+            } else if (regenerator) {
+              bodyPath.replaceWithMultiple(template.ast`
+                require("core-js");
+                require("regenerator-runtime/runtime.js");
+              `);
+            } else {
+              bodyPath.replaceWith(template.ast`
+                require("core-js");
+              `);
+            }
+          }
+        });
+      }
+
+    }
+  };
+}

node_modules/@babel/preset-env/lib/polyfills/regenerator.js

@@ -0,0 +1,54 @@
+"use strict";
+
+Object.defineProperty(exports, "__esModule", {
+  value: true
+});
+exports.default = _default;
+
+var _utils = require("./utils");
+
+function isRegeneratorSource(source) {
+  return source === "regenerator-runtime/runtime" || source === "regenerator-runtime/runtime.js";
+}
+
+function _default() {
+  const visitor = {
+    ImportDeclaration(path) {
+      if (isRegeneratorSource((0, _utils.getImportSource)(path))) {
+        this.regeneratorImportExcluded = true;
+        path.remove();
+      }
+    },
+
+    Program(path) {
+      path.get("body").forEach(bodyPath => {
+        if (isRegeneratorSource((0, _utils.getRequireSource)(bodyPath))) {
+          this.regeneratorImportExcluded = true;
+          bodyPath.remove();
+        }
+      });
+    }
+
+  };
+  return {
+    name: "preset-env/remove-regenerator",
+    visitor,
+
+    pre() {
+      this.regeneratorImportExcluded = false;
+    },
+
+    post() {
+      if (this.opts.debug && this.regeneratorImportExcluded) {
+        let filename = this.file.opts.filename;
+
+        if (process.env.BABEL_ENV === "test") {
+          filename = filename.replace(/\\/g, "/");
+        }
+
+        console.log(`\n[${filename}] Based on your targets, regenerator-runtime import excluded.`);
+      }
+    }
+
+  };
+}

node_modules/@babel/preset-env/lib/polyfills/utils.js

@@ -0,0 +1,40 @@
+"use strict";
+
+Object.defineProperty(exports, "__esModule", {
+  value: true
+});
+exports.getImportSource = getImportSource;
+exports.getRequireSource = getRequireSource;
+exports.isPolyfillSource = isPolyfillSource;
+
+var _t = require("@babel/types");
+
+const {
+  isCallExpression,
+  isExpressionStatement,
+  isIdentifier,
+  isStringLiteral
+} = _t;
+
+function getImportSource({
+  node
+}) {
+  if (node.specifiers.length === 0) return node.source.value;
+}
+
+function getRequireSource({
+  node
+}) {
+  if (!isExpressionStatement(node)) return;
+  const {
+    expression
+  } = node;
+
+  if (isCallExpression(expression) && isIdentifier(expression.callee) && expression.callee.name === "require" && expression.arguments.length === 1 && isStringLiteral(expression.arguments[0])) {
+    return expression.arguments[0].value;
+  }
+}
+
+function isPolyfillSource(source) {
+  return source === "@babel/polyfill" || source === "core-js";
+}