Initial commit (from f5274cbdce4ae7c9e4b937dcdf95ac70ae436d5f)

node_modules/tslint/lib/rules/encodingRule.js

@@ -0,0 +1,76 @@
+"use strict";
+/**
+ * @license
+ * Copyright 2017 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 Lint = require("../index");
+var utils_1 = require("../utils");
+var Rule = /** @class */ (function (_super) {
+    tslib_1.__extends(Rule, _super);
+    function Rule() {
+        return _super !== null && _super.apply(this, arguments) || this;
+    }
+    /* tslint:enable:object-literal-sort-keys */
+    Rule.FAILURE_STRING = function (actual) {
+        return "This file is encoded as " + showEncoding(actual) + " instead of UTF-8.";
+    };
+    Rule.prototype.apply = function (sourceFile) {
+        return this.applyWithFunction(sourceFile, walk);
+    };
+    /* tslint:disable:object-literal-sort-keys */
+    Rule.metadata = {
+        ruleName: "encoding",
+        description: "Enforces UTF-8 file encoding.",
+        optionsDescription: "Not configurable.",
+        options: null,
+        optionExamples: ["true"],
+        type: "style",
+        typescriptOnly: false,
+    };
+    return Rule;
+}(Lint.Rules.AbstractRule));
+exports.Rule = Rule;
+function walk(ctx) {
+    var encoding = detectEncoding(ctx.sourceFile.fileName);
+    if (encoding !== "utf8") {
+        ctx.addFailure(0, 1, Rule.FAILURE_STRING(encoding));
+    }
+}
+function showEncoding(encoding) {
+    switch (encoding) {
+        case "utf8":
+            return "UTF-8";
+        case "utf8-bom":
+            return "UTF-8 with byte-order marker (BOM)";
+        case "utf16le":
+            return "UTF-16 (little-endian)";
+        case "utf16be":
+            return "UTF-16 (big-endian)";
+    }
+}
+function detectEncoding(fileName) {
+    var fd = fs.openSync(fileName, "r");
+    var maxBytesRead = 3; // Only need 3 bytes to detect the encoding.
+    var buffer = Buffer.allocUnsafe(maxBytesRead);
+    var bytesRead = fs.readSync(fd, buffer, 
+    /*offset*/ 0, 
+    /*length*/ maxBytesRead, 
+    /*position*/ 0);
+    fs.closeSync(fd);
+    return utils_1.detectBufferEncoding(buffer, bytesRead);
+}