85 lines
2.4 KiB
Plaintext
85 lines
2.4 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 eolLast = utils.createRule({
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name: "eol-last",
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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 newline at the end of files"
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},
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fixable: "whitespace",
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schema: [
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{
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type: "string",
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enum: ["always", "never", "unix", "windows"]
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}
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],
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messages: {
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missing: "Newline required at end of file but not found.",
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unexpected: "Newline not allowed at end of file."
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}
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},
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create(context) {
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return {
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Program: function checkBadEOF(node) {
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const sourceCode = context.sourceCode;
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const src = sourceCode.getText();
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const lastLine = sourceCode.lines[sourceCode.lines.length - 1];
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const location = {
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column: lastLine.length,
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line: sourceCode.lines.length
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};
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const LF = "\n";
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const CRLF = `\r${LF}`;
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const endsWithNewline = src.endsWith(LF);
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if (!src.length)
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return;
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let mode = context.options[0] || "always";
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let appendCRLF = false;
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if (mode === "unix") {
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mode = "always";
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}
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if (mode === "windows") {
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mode = "always";
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appendCRLF = true;
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}
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if (mode === "always" && !endsWithNewline) {
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context.report({
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node,
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loc: location,
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messageId: "missing",
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fix(fixer) {
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return fixer.insertTextAfterRange([0, src.length], appendCRLF ? CRLF : LF);
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}
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});
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} else if (mode === "never" && endsWithNewline) {
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const secondLastLine = sourceCode.lines[sourceCode.lines.length - 2];
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context.report({
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node,
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loc: {
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start: { line: sourceCode.lines.length - 1, column: secondLastLine.length },
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end: { line: sourceCode.lines.length, column: 0 }
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},
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messageId: "unexpected",
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fix(fixer) {
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const finalEOLs = /(?:\r?\n)+$/u;
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const match = finalEOLs.exec(sourceCode.text);
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const start = match.index;
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const end = sourceCode.text.length;
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return fixer.replaceTextRange([start, end], "");
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}
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});
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}
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}
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};
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}
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});
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module.exports = eolLast;
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