WIP - add extractor, generate snippet_data

node_modules/babel-plugin-minify-guarded-expressions/README.md

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+# babel-plugin-minify-guarded-expressions
+
+## Example
+
+**In**
+
+```javascript
+!x && foo();
+alert(0 && new Foo());
+```
+
+**Out**
+
+```javascript
+x || foo();
+alert(0);
+```
+
+## Installation
+
+```sh
+npm install babel-plugin-minify-guarded-expressions
+```
+
+## Usage
+
+### Via `.babelrc` (Recommended)
+
+**.babelrc**
+
+```json
+{
+  "plugins": ["minify-guarded-expressions"]
+}
+```
+
+### Via CLI
+
+```sh
+babel --plugins minify-guarded-expressions script.js
+```
+
+### Via Node API
+
+```javascript
+require("babel-core").transform("code", {
+  plugins: ["minify-guarded-expressions"]
+});
+```

node_modules/babel-plugin-minify-guarded-expressions/lib/index.js

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+"use strict";
+
+module.exports = function (_ref) {
+  var t = _ref.types;
+
+  var flipExpressions = require("babel-helper-flip-expressions")(t);
+
+  return {
+    name: "minify-guarded-expressions",
+    visitor: {
+      // Convert guarded expressions
+      // !a && b() --> a || b();
+      // This could change the return result of the expression so we only do it
+      // on things where the result is ignored.
+      LogicalExpression: {
+        enter: [function (path) {
+          var node = path.node;
+
+
+          var left = path.get("left");
+          var right = path.get("right");
+
+          // issues - 171, 174, 176
+          // we assume that it is returned/assigned/part of a bigger expression
+          // or utilized somehow
+          // we check if we shouldBail only when evaluating
+          // the rightside of the expression;
+          // if the left side is evaluated to be deterministic,
+          // we can safely replace the entire expression
+          var shouldBail = !path.parentPath.isExpressionStatement();
+
+          if (node.operator === "&&") {
+            var leftTruthy = left.evaluateTruthy();
+            if (leftTruthy === false) {
+              // Short-circuit
+              path.replaceWith(node.left);
+            } else if (leftTruthy === true && left.isPure()) {
+              path.replaceWith(node.right);
+            } else if (right.evaluateTruthy() === false && right.isPure() && !shouldBail) {
+              path.replaceWith(node.left);
+            }
+          } else if (node.operator === "||") {
+            var _leftTruthy = left.evaluateTruthy();
+            if (_leftTruthy === false && left.isPure()) {
+              path.replaceWith(node.right);
+            } else if (_leftTruthy === true) {
+              // Short-circuit
+              path.replaceWith(node.left);
+            } else if (right.evaluateTruthy() === false && right.isPure() && !shouldBail) {
+              path.replaceWith(node.left);
+            }
+          }
+        }, function (path) {
+          var node = path.node;
+
+
+          if (flipExpressions.hasSeen(node)) {
+            return;
+          }
+
+          if (!path.parentPath.isExpressionStatement() && !(path.parentPath.isSequenceExpression() && path.parentPath.parentPath.isExpressionStatement())) {
+            return;
+          }
+
+          // Start counting savings from one since we can ignore the last
+          // expression.
+          if (flipExpressions.shouldFlip(node, 1)) {
+            var newNode = flipExpressions.flip(node, true);
+            path.replaceWith(newNode);
+          }
+        }]
+      }
+    }
+  };
+};

node_modules/babel-plugin-minify-guarded-expressions/package.json

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+{
+  "_from": "babel-plugin-minify-guarded-expressions@^0.3.0",
+  "_id": "babel-plugin-minify-guarded-expressions@0.3.0",
+  "_inBundle": false,
+  "_integrity": "sha512-O+6CvF5/Ttsth3LMg4/BhyvVZ82GImeKMXGdVRQGK/8jFiP15EjRpdgFlxv3cnqRjqdYxLCS6r28VfLpb9C/kA==",
+  "_location": "/babel-plugin-minify-guarded-expressions",
+  "_phantomChildren": {},
+  "_requested": {
+    "type": "range",
+    "registry": true,
+    "raw": "babel-plugin-minify-guarded-expressions@^0.3.0",
+    "name": "babel-plugin-minify-guarded-expressions",
+    "escapedName": "babel-plugin-minify-guarded-expressions",
+    "rawSpec": "^0.3.0",
+    "saveSpec": null,
+    "fetchSpec": "^0.3.0"
+  },
+  "_requiredBy": [
+    "/babel-preset-minify"
+  ],
+  "_resolved": "https://registry.npmjs.org/babel-plugin-minify-guarded-expressions/-/babel-plugin-minify-guarded-expressions-0.3.0.tgz",
+  "_shasum": "2552d96189ef45d9a463f1a6b5e4fa110703ac8d",
+  "_spec": "babel-plugin-minify-guarded-expressions@^0.3.0",
+  "_where": "/Users/stefanfejes/Projects/30-seconds-of-python-code/node_modules/babel-preset-minify",
+  "author": {
+    "name": "amasad"
+  },
+  "bugs": {
+    "url": "https://github.com/babel/minify/issues"
+  },
+  "bundleDependencies": false,
+  "dependencies": {
+    "babel-helper-flip-expressions": "^0.3.0"
+  },
+  "deprecated": false,
+  "description": "## Example",
+  "homepage": "https://github.com/babel/minify#readme",
+  "keywords": [
+    "babel-plugin"
+  ],
+  "license": "MIT",
+  "main": "lib/index.js",
+  "name": "babel-plugin-minify-guarded-expressions",
+  "repository": {
+    "type": "git",
+    "url": "https://github.com/babel/minify/tree/master/packages/babel-plugin-minify-guarded-expressions"
+  },
+  "version": "0.3.0"
+}