118 lines
4.0 KiB
JavaScript
118 lines
4.0 KiB
JavaScript
/**
|
|
* @fileoverview Rule that warns when identifier names are shorter or longer
|
|
* than the values provided in configuration.
|
|
* @author Burak Yigit Kaya aka BYK
|
|
*/
|
|
|
|
"use strict";
|
|
|
|
//------------------------------------------------------------------------------
|
|
// Rule Definition
|
|
//------------------------------------------------------------------------------
|
|
|
|
module.exports = {
|
|
meta: {
|
|
docs: {
|
|
description: "enforce minimum and maximum identifier lengths",
|
|
category: "Stylistic Issues",
|
|
recommended: false,
|
|
url: "https://eslint.org/docs/rules/id-length"
|
|
},
|
|
|
|
schema: [
|
|
{
|
|
type: "object",
|
|
properties: {
|
|
min: {
|
|
type: "number"
|
|
},
|
|
max: {
|
|
type: "number"
|
|
},
|
|
exceptions: {
|
|
type: "array",
|
|
uniqueItems: true,
|
|
items: {
|
|
type: "string"
|
|
}
|
|
},
|
|
properties: {
|
|
enum: ["always", "never"]
|
|
}
|
|
},
|
|
additionalProperties: false
|
|
}
|
|
]
|
|
},
|
|
|
|
create(context) {
|
|
const options = context.options[0] || {};
|
|
const minLength = typeof options.min !== "undefined" ? options.min : 2;
|
|
const maxLength = typeof options.max !== "undefined" ? options.max : Infinity;
|
|
const properties = options.properties !== "never";
|
|
const exceptions = (options.exceptions ? options.exceptions : [])
|
|
.reduce((obj, item) => {
|
|
obj[item] = true;
|
|
|
|
return obj;
|
|
}, {});
|
|
|
|
const SUPPORTED_EXPRESSIONS = {
|
|
MemberExpression: properties && function(parent) {
|
|
return !parent.computed && (
|
|
|
|
// regular property assignment
|
|
(parent.parent.left === parent && parent.parent.type === "AssignmentExpression" ||
|
|
|
|
// or the last identifier in an ObjectPattern destructuring
|
|
parent.parent.type === "Property" && parent.parent.value === parent &&
|
|
parent.parent.parent.type === "ObjectPattern" && parent.parent.parent.parent.left === parent.parent.parent)
|
|
);
|
|
},
|
|
AssignmentPattern(parent, node) {
|
|
return parent.left === node;
|
|
},
|
|
VariableDeclarator(parent, node) {
|
|
return parent.id === node;
|
|
},
|
|
Property: properties && function(parent, node) {
|
|
return parent.key === node;
|
|
},
|
|
ImportDefaultSpecifier: true,
|
|
RestElement: true,
|
|
FunctionExpression: true,
|
|
ArrowFunctionExpression: true,
|
|
ClassDeclaration: true,
|
|
FunctionDeclaration: true,
|
|
MethodDefinition: true,
|
|
CatchClause: true
|
|
};
|
|
|
|
return {
|
|
Identifier(node) {
|
|
const name = node.name;
|
|
const parent = node.parent;
|
|
|
|
const isShort = name.length < minLength;
|
|
const isLong = name.length > maxLength;
|
|
|
|
if (!(isShort || isLong) || exceptions[name]) {
|
|
return; // Nothing to report
|
|
}
|
|
|
|
const isValidExpression = SUPPORTED_EXPRESSIONS[parent.type];
|
|
|
|
if (isValidExpression && (isValidExpression === true || isValidExpression(parent, node))) {
|
|
context.report({
|
|
node,
|
|
message: isShort
|
|
? "Identifier name '{{name}}' is too short (< {{min}})."
|
|
: "Identifier name '{{name}}' is too long (> {{max}}).",
|
|
data: { name, min: minLength, max: maxLength }
|
|
});
|
|
}
|
|
}
|
|
};
|
|
}
|
|
};
|