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58 lines
1.5 KiB
Plaintext
58 lines
1.5 KiB
Plaintext
'use strict';
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var utils = require('../utils.js');
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require('eslint-visitor-keys');
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require('espree');
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require('estraverse');
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var oneVarDeclarationPerLine = utils.createRule({
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name: "one-var-declaration-per-line",
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package: "js",
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meta: {
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type: "layout",
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docs: {
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description: "Require or disallow newlines around variable declarations"
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},
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schema: [
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{
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type: "string",
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enum: ["always", "initializations"]
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}
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],
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fixable: "whitespace",
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messages: {
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expectVarOnNewline: "Expected variable declaration to be on a new line."
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}
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},
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create(context) {
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const always = context.options[0] === "always";
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function isForTypeSpecifier(keyword) {
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return keyword === "ForStatement" || keyword === "ForInStatement" || keyword === "ForOfStatement";
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}
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function checkForNewLine(node) {
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if (isForTypeSpecifier(node.parent.type))
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return;
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const declarations = node.declarations;
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let prev;
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declarations.forEach((current) => {
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if (prev && prev.loc.end.line === current.loc.start.line) {
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if (always || prev.init || current.init) {
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context.report({
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node,
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messageId: "expectVarOnNewline",
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loc: current.loc,
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fix: (fixer) => fixer.insertTextBefore(current, "\n")
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});
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}
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}
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prev = current;
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});
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}
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return {
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VariableDeclaration: checkForNewLine
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};
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}
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});
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module.exports = oneVarDeclarationPerLine;
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