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1 files changed, 218 insertions, 0 deletions

diff --git a/node_modules/babel-loader/lib/cache.js b/node_modules/babel-loader/lib/cache.js
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+"use strict";
+
+function _asyncToGenerator(fn) { return function () { var self = this, args = arguments; return new Promise(function (resolve, reject) { var gen = fn.apply(self, args); function step(key, arg) { try { var info = gen[key](arg); var value = info.value; } catch (error) { reject(error); return; } if (info.done) { resolve(value); } else { Promise.resolve(value).then(_next, _throw); } } function _next(value) { step("next", value); } function _throw(err) { step("throw", err); } _next(); }); }; }
+
+/**
+ * Filesystem Cache
+ *
+ * Given a file and a transform function, cache the result into files
+ * or retrieve the previously cached files if the given file is already known.
+ *
+ * @see https://github.com/babel/babel-loader/issues/34
+ * @see https://github.com/babel/babel-loader/pull/41
+ */
+const fs = require("fs");
+
+const os = require("os");
+
+const path = require("path");
+
+const zlib = require("zlib");
+
+const crypto = require("crypto");
+
+const mkdirpOrig = require("mkdirp");
+
+const findCacheDir = require("find-cache-dir");
+
+const promisify = require("util.promisify");
+
+const transform = require("./transform"); // Lazily instantiated when needed
+
+
+let defaultCacheDirectory = null;
+const readFile = promisify(fs.readFile);
+const writeFile = promisify(fs.writeFile);
+const gunzip = promisify(zlib.gunzip);
+const gzip = promisify(zlib.gzip);
+const mkdirp = promisify(mkdirpOrig);
+/**
+ * Read the contents from the compressed file.
+ *
+ * @async
+ * @params {String} filename
+ */
+
+const read =
+/*#__PURE__*/
+function () {
+  var _ref = _asyncToGenerator(function* (filename) {
+    const data = yield readFile(filename);
+    const content = yield gunzip(data);
+    return JSON.parse(content);
+  });
+
+  return function read(_x) {
+    return _ref.apply(this, arguments);
+  };
+}();
+/**
+ * Write contents into a compressed file.
+ *
+ * @async
+ * @params {String} filename
+ * @params {String} result
+ */
+
+
+const write =
+/*#__PURE__*/
+function () {
+  var _ref2 = _asyncToGenerator(function* (filename, result) {
+    const content = JSON.stringify(result);
+    const data = yield gzip(content);
+    return yield writeFile(filename, data);
+  });
+
+  return function write(_x2, _x3) {
+    return _ref2.apply(this, arguments);
+  };
+}();
+/**
+ * Build the filename for the cached file
+ *
+ * @params {String} source  File source code
+ * @params {Object} options Options used
+ *
+ * @return {String}
+ */
+
+
+const filename = function (source, identifier, options) {
+  const hash = crypto.createHash("SHA1");
+  const contents = JSON.stringify({
+    source,
+    options,
+    identifier
+  });
+  hash.end(contents);
+  return hash.read().toString("hex") + ".json.gz";
+};
+/**
+ * Handle the cache
+ *
+ * @params {String} directory
+ * @params {Object} params
+ */
+
+
+const handleCache =
+/*#__PURE__*/
+function () {
+  var _ref3 = _asyncToGenerator(function* (directory, params) {
+    const {
+      source,
+      options = {},
+      cacheIdentifier,
+      cacheDirectory
+    } = params;
+    const fallback = typeof cacheDirectory !== "string" && directory !== os.tmpdir(); // Make sure the directory exists.
+
+    try {
+      yield mkdirp(directory);
+    } catch (err) {
+      if (fallback) {
+        return handleCache(os.tmpdir(), params);
+      }
+
+      throw err;
+    }
+
+    const file = path.join(directory, filename(source, cacheIdentifier, options));
+
+    try {
+      // No errors mean that the file was previously cached
+      // we just need to return it
+      return yield read(file);
+    } catch (err) {} // Otherwise just transform the file
+    // return it to the user asap and write it in cache
+
+
+    const result = yield transform(source, options);
+
+    try {
+      yield write(file, result);
+    } catch (err) {
+      if (fallback) {
+        // Fallback to tmpdir if node_modules folder not writable
+        return handleCache(os.tmpdir(), params);
+      }
+
+      throw err;
+    }
+
+    return result;
+  });
+
+  return function handleCache(_x4, _x5) {
+    return _ref3.apply(this, arguments);
+  };
+}();
+/**
+ * Retrieve file from cache, or create a new one for future reads
+ *
+ * @async
+ * @param  {Object}   params
+ * @param  {String}   params.directory  Directory to store cached files
+ * @param  {String}   params.identifier Unique identifier to bust cache
+ * @param  {String}   params.source   Original contents of the file to be cached
+ * @param  {Object}   params.options  Options to be given to the transform fn
+ * @param  {Function} params.transform  Function that will transform the
+ *                                      original file and whose result will be
+ *                                      cached
+ *
+ * @example
+ *
+ *   cache({
+ *     directory: '.tmp/cache',
+ *     identifier: 'babel-loader-cachefile',
+ *     source: *source code from file*,
+ *     options: {
+ *       experimental: true,
+ *       runtime: true
+ *     },
+ *     transform: function(source, options) {
+ *       var content = *do what you need with the source*
+ *       return content;
+ *     }
+ *   }, function(err, result) {
+ *
+ *   });
+ */
+
+
+module.exports =
+/*#__PURE__*/
+function () {
+  var _ref4 = _asyncToGenerator(function* (params) {
+    let directory;
+
+    if (typeof params.cacheDirectory === "string") {
+      directory = params.cacheDirectory;
+    } else {
+      if (defaultCacheDirectory === null) {
+        defaultCacheDirectory = findCacheDir({
+          name: "babel-loader"
+        }) || os.tmpdir();
+      }
+
+      directory = defaultCacheDirectory;
+    }
+
+    return yield handleCache(directory, params);
+  });
+
+  return function (_x6) {
+    return _ref4.apply(this, arguments);
+  };
+}();
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