1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
|
"use strict";
/**
* @license
* Copyright 2013 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");
// tslint:disable object-literal-sort-keys
var ts = require("typescript");
var Lint = require("../index");
var utils_1 = require("../utils");
var BANNED_KEYWORDS = ["any", "Number", "number", "String", "string", "Boolean", "boolean", "Undefined", "undefined"];
var bannedKeywordsSet = new Set(BANNED_KEYWORDS);
var bannedKeywordsStr = BANNED_KEYWORDS.map(function (kw) { return "`" + kw + "`"; }).join(", ");
var OPTION_LEADING_UNDERSCORE = "allow-leading-underscore";
var OPTION_TRAILING_UNDERSCORE = "allow-trailing-underscore";
var OPTION_BAN_KEYWORDS = "ban-keywords";
var OPTION_CHECK_FORMAT = "check-format";
var OPTION_ALLOW_PASCAL_CASE = "allow-pascal-case";
var OPTION_ALLOW_SNAKE_CASE = "allow-snake-case";
var Rule = /** @class */ (function (_super) {
tslib_1.__extends(Rule, _super);
function Rule() {
return _super !== null && _super.apply(this, arguments) || this;
}
Rule.prototype.apply = function (sourceFile) {
return this.applyWithFunction(sourceFile, walk, parseOptions(this.ruleArguments));
};
Rule.metadata = {
ruleName: "variable-name",
description: "Checks variable names for various errors.",
optionsDescription: (_a = ["\n Five arguments may be optionally provided:\n\n * `\"", "\"`: allows only lowerCamelCased or UPPER_CASED variable names\n * `\"", "\"` allows underscores at the beginning (only has an effect if \"check-format\" specified)\n * `\"", "\"` allows underscores at the end. (only has an effect if \"check-format\" specified)\n * `\"", "\"` allows PascalCase in addition to lowerCamelCase.\n * `\"", "\"` allows snake_case in addition to lowerCamelCase.\n * `\"", "\"`: disallows the use of certain TypeScript keywords as variable or parameter names.\n * These are: ", ""], _a.raw = ["\n Five arguments may be optionally provided:\n\n * \\`\"", "\"\\`: allows only lowerCamelCased or UPPER_CASED variable names\n * \\`\"", "\"\\` allows underscores at the beginning (only has an effect if \"check-format\" specified)\n * \\`\"", "\"\\` allows underscores at the end. (only has an effect if \"check-format\" specified)\n * \\`\"", "\"\\` allows PascalCase in addition to lowerCamelCase.\n * \\`\"", "\"\\` allows snake_case in addition to lowerCamelCase.\n * \\`\"", "\"\\`: disallows the use of certain TypeScript keywords as variable or parameter names.\n * These are: ", ""], Lint.Utils.dedent(_a, OPTION_CHECK_FORMAT, OPTION_LEADING_UNDERSCORE, OPTION_TRAILING_UNDERSCORE, OPTION_ALLOW_PASCAL_CASE, OPTION_ALLOW_SNAKE_CASE, OPTION_BAN_KEYWORDS, bannedKeywordsStr)),
options: {
type: "array",
items: {
type: "string",
enum: [
OPTION_CHECK_FORMAT,
OPTION_LEADING_UNDERSCORE,
OPTION_TRAILING_UNDERSCORE,
OPTION_ALLOW_PASCAL_CASE,
OPTION_ALLOW_SNAKE_CASE,
OPTION_BAN_KEYWORDS,
],
},
minLength: 0,
maxLength: 5,
},
optionExamples: [[true, "ban-keywords", "check-format", "allow-leading-underscore"]],
type: "style",
typescriptOnly: false,
};
Rule.KEYWORD_FAILURE = "variable name clashes with keyword/type";
return Rule;
}(Lint.Rules.AbstractRule));
exports.Rule = Rule;
function parseOptions(ruleArguments) {
var banKeywords = hasOption(OPTION_BAN_KEYWORDS);
return {
banKeywords: banKeywords,
// check variable name formatting by default if no options are specified
checkFormat: !banKeywords || hasOption(OPTION_CHECK_FORMAT),
leadingUnderscore: hasOption(OPTION_LEADING_UNDERSCORE),
trailingUnderscore: hasOption(OPTION_TRAILING_UNDERSCORE),
allowPascalCase: hasOption(OPTION_ALLOW_PASCAL_CASE),
allowSnakeCase: hasOption(OPTION_ALLOW_SNAKE_CASE),
};
function hasOption(name) {
return ruleArguments.indexOf(name) !== -1;
}
}
function walk(ctx) {
var options = ctx.options, sourceFile = ctx.sourceFile;
return ts.forEachChild(sourceFile, function cb(node) {
switch (node.kind) {
case ts.SyntaxKind.BindingElement: {
var _a = node, initializer = _a.initializer, name = _a.name, propertyName = _a.propertyName;
if (name.kind === ts.SyntaxKind.Identifier) {
handleVariableNameKeyword(name);
// A destructuring pattern that does not rebind an expression is always an alias, e.g. `var {Foo} = ...;`.
// Only check if the name is rebound (`var {Foo: bar} = ...;`).
if (node.parent.kind !== ts.SyntaxKind.ObjectBindingPattern || propertyName !== undefined) {
handleVariableNameFormat(name, initializer);
}
}
break;
}
case ts.SyntaxKind.VariableStatement:
// skip 'declare' keywords
if (Lint.hasModifier(node.modifiers, ts.SyntaxKind.DeclareKeyword)) {
return;
}
break;
case ts.SyntaxKind.Parameter:
case ts.SyntaxKind.PropertyDeclaration:
case ts.SyntaxKind.VariableDeclaration: {
var _b = node, name = _b.name, initializer = _b.initializer;
if (name.kind === ts.SyntaxKind.Identifier) {
handleVariableNameFormat(name, initializer);
// do not check property declarations for keywords, they are allowed to be keywords
if (node.kind !== ts.SyntaxKind.PropertyDeclaration) {
handleVariableNameKeyword(name);
}
}
}
}
return ts.forEachChild(node, cb);
});
function handleVariableNameFormat(name, initializer) {
if (!options.checkFormat) {
return;
}
var text = name.text;
if (initializer !== undefined && isAlias(text, initializer)) {
return;
}
if (text.length !== 0 && !isCamelCase(text, options) && !utils_1.isUpperCase(text)) {
ctx.addFailureAtNode(name, formatFailure());
}
}
function handleVariableNameKeyword(name) {
if (options.banKeywords && bannedKeywordsSet.has(name.text)) {
ctx.addFailureAtNode(name, Rule.KEYWORD_FAILURE);
}
}
function formatFailure() {
var failureMessage = "variable name must be in lowerCamelCase";
if (options.allowPascalCase) {
failureMessage += ", PascalCase";
}
if (options.allowSnakeCase) {
failureMessage += ", snake_case";
}
return failureMessage + " or UPPER_CASE";
}
}
function isAlias(name, initializer) {
switch (initializer.kind) {
case ts.SyntaxKind.PropertyAccessExpression:
return initializer.name.text === name;
case ts.SyntaxKind.Identifier:
return initializer.text === name;
default:
return false;
}
}
function isCamelCase(name, options) {
var firstCharacter = name[0];
var lastCharacter = name[name.length - 1];
var middle = name.slice(1, -1);
if (!options.leadingUnderscore && firstCharacter === "_") {
return false;
}
if (!options.trailingUnderscore && lastCharacter === "_") {
return false;
}
if (!options.allowPascalCase && !utils_1.isLowerCase(firstCharacter)) {
return false;
}
if (!options.allowSnakeCase && middle.indexOf("_") !== -1) {
return false;
}
return true;
}
var _a;
|