Initial commit (from f5274cbdce4ae7c9e4b937dcdf95ac70ae436d5f)

node_modules/tslint/lib/files/reading.js

@@ -0,0 +1,49 @@
+"use strict";
+/**
+ * @license
+ * Copyright 2019 Palantir Technologies, Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+Object.defineProperty(exports, "__esModule", { value: true });
+var tslib_1 = require("tslib");
+var fs = require("fs");
+var error_1 = require("../error");
+/** Read a file, but return undefined if it is an MPEG '.ts' file. */
+function tryReadFile(filename, logger) {
+    return tslib_1.__awaiter(this, void 0, void 0, function () {
+        var buffer, fd;
+        return tslib_1.__generator(this, function (_a) {
+            if (!fs.existsSync(filename)) {
+                throw new error_1.FatalError("Unable to open file: " + filename);
+            }
+            buffer = Buffer.allocUnsafe(256);
+            fd = fs.openSync(filename, "r");
+            try {
+                fs.readSync(fd, buffer, 0, 256, 0);
+                if (buffer.readInt8(0) === 0x47 && buffer.readInt8(188) === 0x47) {
+                    // MPEG transport streams use the '.ts' file extension. They use 0x47 as the frame
+                    // separator, repeating every 188 bytes. It is unlikely to find that pattern in
+                    // TypeScript source, so tslint ignores files with the specific pattern.
+                    logger.error(filename + ": ignoring MPEG transport stream\n");
+                    return [2 /*return*/, undefined];
+                }
+            }
+            finally {
+                fs.closeSync(fd);
+            }
+            return [2 /*return*/, fs.readFileSync(filename, "utf8")];
+        });
+    });
+}
+exports.tryReadFile = tryReadFile;