106 lines
3.3 KiB
Plaintext
106 lines
3.3 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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const SELECTOR = [
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"BreakStatement",
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"ContinueStatement",
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"DebuggerStatement",
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"DoWhileStatement",
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"ExportAllDeclaration",
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"ExportDefaultDeclaration",
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"ExportNamedDeclaration",
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"ExpressionStatement",
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"ImportDeclaration",
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"ReturnStatement",
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"ThrowStatement",
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"VariableDeclaration",
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"PropertyDefinition"
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].join(",");
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function getChildren(node) {
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const t = node.type;
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if (t === "BlockStatement" || t === "StaticBlock" || t === "Program" || t === "ClassBody") {
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return node.body;
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}
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if (t === "SwitchCase")
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return node.consequent;
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return null;
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}
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function isLastChild(node) {
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if (!node.parent)
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return true;
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const t = node.parent.type;
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if (t === "IfStatement" && node.parent.consequent === node && node.parent.alternate) {
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return true;
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}
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if (t === "DoWhileStatement") {
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return true;
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}
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const nodeList = getChildren(node.parent);
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return nodeList !== null && nodeList[nodeList.length - 1] === node;
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}
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var semiStyle = utils.createRule({
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name: "semi-style",
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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: "Enforce location of semicolons"
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},
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schema: [{ type: "string", enum: ["last", "first"] }],
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fixable: "whitespace",
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messages: {
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expectedSemiColon: "Expected this semicolon to be at {{pos}}."
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}
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},
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create(context) {
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const sourceCode = context.sourceCode;
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const option = context.options[0] || "last";
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function check(semiToken, expected) {
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const prevToken = sourceCode.getTokenBefore(semiToken);
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const nextToken = sourceCode.getTokenAfter(semiToken);
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const prevIsSameLine = !prevToken || utils.isTokenOnSameLine(prevToken, semiToken);
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const nextIsSameLine = !nextToken || utils.isTokenOnSameLine(semiToken, nextToken);
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if (expected === "last" && !prevIsSameLine || expected === "first" && !nextIsSameLine) {
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context.report({
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loc: semiToken.loc,
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messageId: "expectedSemiColon",
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data: {
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pos: expected === "last" ? "the end of the previous line" : "the beginning of the next line"
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},
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fix(fixer) {
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if (prevToken && nextToken && sourceCode.commentsExistBetween(prevToken, nextToken))
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return null;
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const start = prevToken ? prevToken.range[1] : semiToken.range[0];
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const end = nextToken ? nextToken.range[0] : semiToken.range[1];
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const text = expected === "last" ? ";\n" : "\n;";
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return fixer.replaceTextRange([start, end], text);
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}
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});
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}
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}
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return {
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[SELECTOR](node) {
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if (option === "first" && isLastChild(node))
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return;
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const lastToken = sourceCode.getLastToken(node);
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if (utils.isSemicolonToken(lastToken))
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check(lastToken, option);
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},
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ForStatement(node) {
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const firstSemi = node.init && sourceCode.getTokenAfter(node.init, utils.isSemicolonToken);
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const secondSemi = node.test && sourceCode.getTokenAfter(node.test, utils.isSemicolonToken);
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if (firstSemi)
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check(firstSemi, "last");
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if (secondSemi)
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check(secondSemi, "last");
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}
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};
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}
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});
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module.exports = semiStyle;
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