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codeql-action/node_modules/eslint/lib/rules/newline-per-chained-call.js
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/** | |
* @fileoverview Rule to ensure newline per method call when chaining calls | |
* @author Rajendra Patil | |
* @author Burak Yigit Kaya | |
*/ | |
"use strict"; | |
const astUtils = require("./utils/ast-utils"); | |
//------------------------------------------------------------------------------ | |
// Rule Definition | |
//------------------------------------------------------------------------------ | |
/** @type {import('../shared/types').Rule} */ | |
module.exports = { | |
meta: { | |
type: "layout", | |
docs: { | |
description: "Require a newline after each call in a method chain", | |
recommended: false, | |
url: "https://eslint.org/docs/latest/rules/newline-per-chained-call" | |
}, | |
fixable: "whitespace", | |
schema: [{ | |
type: "object", | |
properties: { | |
ignoreChainWithDepth: { | |
type: "integer", | |
minimum: 1, | |
maximum: 10, | |
default: 2 | |
} | |
}, | |
additionalProperties: false | |
}], | |
messages: { | |
expected: "Expected line break before `{{callee}}`." | |
} | |
}, | |
create(context) { | |
const options = context.options[0] || {}, | |
ignoreChainWithDepth = options.ignoreChainWithDepth || 2; | |
const sourceCode = context.sourceCode; | |
/** | |
* Get the prefix of a given MemberExpression node. | |
* If the MemberExpression node is a computed value it returns a | |
* left bracket. If not it returns a period. | |
* @param {ASTNode} node A MemberExpression node to get | |
* @returns {string} The prefix of the node. | |
*/ | |
function getPrefix(node) { | |
if (node.computed) { | |
if (node.optional) { | |
return "?.["; | |
} | |
return "["; | |
} | |
if (node.optional) { | |
return "?."; | |
} | |
return "."; | |
} | |
/** | |
* Gets the property text of a given MemberExpression node. | |
* If the text is multiline, this returns only the first line. | |
* @param {ASTNode} node A MemberExpression node to get. | |
* @returns {string} The property text of the node. | |
*/ | |
function getPropertyText(node) { | |
const prefix = getPrefix(node); | |
const lines = sourceCode.getText(node.property).split(astUtils.LINEBREAK_MATCHER); | |
const suffix = node.computed && lines.length === 1 ? "]" : ""; | |
return prefix + lines[0] + suffix; | |
} | |
return { | |
"CallExpression:exit"(node) { | |
const callee = astUtils.skipChainExpression(node.callee); | |
if (callee.type !== "MemberExpression") { | |
return; | |
} | |
let parent = astUtils.skipChainExpression(callee.object); | |
let depth = 1; | |
while (parent && parent.callee) { | |
depth += 1; | |
parent = astUtils.skipChainExpression(astUtils.skipChainExpression(parent.callee).object); | |
} | |
if (depth > ignoreChainWithDepth && astUtils.isTokenOnSameLine(callee.object, callee.property)) { | |
const firstTokenAfterObject = sourceCode.getTokenAfter(callee.object, astUtils.isNotClosingParenToken); | |
context.report({ | |
node: callee.property, | |
loc: { | |
start: firstTokenAfterObject.loc.start, | |
end: callee.loc.end | |
}, | |
messageId: "expected", | |
data: { | |
callee: getPropertyText(callee) | |
}, | |
fix(fixer) { | |
return fixer.insertTextBefore(firstTokenAfterObject, "\n"); | |
} | |
}); | |
} | |
} | |
}; | |
} | |
}; |