You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
113 lines
3.3 KiB
113 lines
3.3 KiB
/**
|
|
* @fileoverview Rule to disallow async functions which have no `await` expression.
|
|
* @author Toru Nagashima
|
|
*/
|
|
|
|
"use strict";
|
|
|
|
//------------------------------------------------------------------------------
|
|
// Requirements
|
|
//------------------------------------------------------------------------------
|
|
|
|
const astUtils = require("./utils/ast-utils");
|
|
|
|
//------------------------------------------------------------------------------
|
|
// Helpers
|
|
//------------------------------------------------------------------------------
|
|
|
|
/**
|
|
* Capitalize the 1st letter of the given text.
|
|
* @param {string} text The text to capitalize.
|
|
* @returns {string} The text that the 1st letter was capitalized.
|
|
*/
|
|
function capitalizeFirstLetter(text) {
|
|
return text[0].toUpperCase() + text.slice(1);
|
|
}
|
|
|
|
//------------------------------------------------------------------------------
|
|
// Rule Definition
|
|
//------------------------------------------------------------------------------
|
|
|
|
/** @type {import('../shared/types').Rule} */
|
|
module.exports = {
|
|
meta: {
|
|
type: "suggestion",
|
|
|
|
docs: {
|
|
description: "Disallow async functions which have no `await` expression",
|
|
recommended: false,
|
|
url: "https://eslint.org/docs/latest/rules/require-await"
|
|
},
|
|
|
|
schema: [],
|
|
|
|
messages: {
|
|
missingAwait: "{{name}} has no 'await' expression."
|
|
}
|
|
},
|
|
|
|
create(context) {
|
|
const sourceCode = context.sourceCode;
|
|
let scopeInfo = null;
|
|
|
|
/**
|
|
* Push the scope info object to the stack.
|
|
* @returns {void}
|
|
*/
|
|
function enterFunction() {
|
|
scopeInfo = {
|
|
upper: scopeInfo,
|
|
hasAwait: false
|
|
};
|
|
}
|
|
|
|
/**
|
|
* Pop the top scope info object from the stack.
|
|
* Also, it reports the function if needed.
|
|
* @param {ASTNode} node The node to report.
|
|
* @returns {void}
|
|
*/
|
|
function exitFunction(node) {
|
|
if (!node.generator && node.async && !scopeInfo.hasAwait && !astUtils.isEmptyFunction(node)) {
|
|
context.report({
|
|
node,
|
|
loc: astUtils.getFunctionHeadLoc(node, sourceCode),
|
|
messageId: "missingAwait",
|
|
data: {
|
|
name: capitalizeFirstLetter(
|
|
astUtils.getFunctionNameWithKind(node)
|
|
)
|
|
}
|
|
});
|
|
}
|
|
|
|
scopeInfo = scopeInfo.upper;
|
|
}
|
|
|
|
return {
|
|
FunctionDeclaration: enterFunction,
|
|
FunctionExpression: enterFunction,
|
|
ArrowFunctionExpression: enterFunction,
|
|
"FunctionDeclaration:exit": exitFunction,
|
|
"FunctionExpression:exit": exitFunction,
|
|
"ArrowFunctionExpression:exit": exitFunction,
|
|
|
|
AwaitExpression() {
|
|
if (!scopeInfo) {
|
|
return;
|
|
}
|
|
|
|
scopeInfo.hasAwait = true;
|
|
},
|
|
ForOfStatement(node) {
|
|
if (!scopeInfo) {
|
|
return;
|
|
}
|
|
|
|
if (node.await) {
|
|
scopeInfo.hasAwait = true;
|
|
}
|
|
}
|
|
};
|
|
}
|
|
};
|