eslint-plugin-stylistic-compat/dist/rules/no-multiple-empty-lines.js

Compatibility version of @stylistic/eslint-plugin for Node.js >= 12 and ESLint v8

'use strict';

var _sliceInstanceProperty = require('@babel/runtime-corejs3/core-js/instance/slice');
var _Set = require('@babel/runtime-corejs3/core-js/set');
var _forEachInstanceProperty = require('@babel/runtime-corejs3/core-js/instance/for-each');
var _reduceInstanceProperty = require('@babel/runtime-corejs3/core-js/instance/reduce');
var _concatInstanceProperty = require('@babel/runtime-corejs3/core-js/instance/concat');
var _trimInstanceProperty = require('@babel/runtime-corejs3/core-js/instance/trim');
var utils = require('../utils.js');
require('@babel/runtime-corejs3/core-js/object/from-entries');
require('@babel/runtime-corejs3/core-js/instance/map');
require('@babel/runtime-corejs3/core-js/instance/filter');
require('@babel/runtime-corejs3/core-js/object/entries');
require('@babel/runtime-corejs3/core-js/instance/flags');
require('@babel/runtime-corejs3/core-js/instance/includes');
require('@babel/runtime-corejs3/core-js/instance/starts-with');
require('../vendor.js');
require('@babel/runtime-corejs3/core-js/object/assign');
require('@babel/runtime-corejs3/core-js/object/create');
require('@babel/runtime-corejs3/core-js/object/freeze');
require('@babel/runtime-corejs3/core-js/array/is-array');
require('@babel/runtime-corejs3/core-js/instance/last-index-of');
require('@babel/runtime-corejs3/core-js/object/define-properties');
require('@babel/runtime-corejs3/core-js/object/keys');
require('@babel/runtime-corejs3/core-js/instance/index-of');
require('@babel/runtime-corejs3/core-js/instance/at');
require('@babel/runtime-corejs3/core-js/symbol');
require('@babel/runtime-corejs3/core-js/symbol/iterator');
require('@babel/runtime-corejs3/core-js/parse-int');
require('@babel/runtime-corejs3/core-js/parse-float');
require('@babel/runtime-corejs3/core-js/weak-map');
require('@babel/runtime-corejs3/core-js/object/define-property');
require('@babel/runtime-corejs3/core-js/global-this');
require('@babel/runtime-corejs3/core-js/array/from');
require('eslint/use-at-your-own-risk');
require('eslint');
require('@babel/runtime-corejs3/core-js/object/get-own-property-descriptor');
require('@babel/runtime-corejs3/core-js/map');
require('@babel/runtime-corejs3/core-js/instance/some');
require('@babel/runtime-corejs3/core-js/instance/find');
require('@babel/runtime-corejs3/core-js/instance/every');
require('@babel/runtime-corejs3/core-js/instance/sort');
require('@babel/runtime-corejs3/core-js/array/of');
require('@babel/runtime-corejs3/core-js/instance/entries');
require('@babel/runtime-corejs3/core-js/instance/find-index');
require('@babel/runtime-corejs3/core-js/instance/flat');
require('@babel/runtime-corejs3/core-js/instance/keys');
require('@babel/runtime-corejs3/core-js/instance/values');
require('@babel/runtime-corejs3/core-js/object/get-own-property-names');
require('@babel/runtime-corejs3/core-js/number/is-finite');
require('@babel/runtime-corejs3/core-js/number/is-nan');
require('@babel/runtime-corejs3/core-js/number/parse-float');
require('@babel/runtime-corejs3/core-js/number/parse-int');
require('@babel/runtime-corejs3/core-js/object/is');
require('@babel/runtime-corejs3/core-js/object/is-extensible');
require('@babel/runtime-corejs3/core-js/object/is-frozen');
require('@babel/runtime-corejs3/core-js/object/is-sealed');
require('@babel/runtime-corejs3/core-js/object/values');
require('@babel/runtime-corejs3/core-js/string/from-code-point');
require('@babel/runtime-corejs3/core-js/string/raw');
require('@babel/runtime-corejs3/core-js/instance/code-point-at');
require('@babel/runtime-corejs3/core-js/instance/ends-with');
require('@babel/runtime-corejs3/core-js/instance/pad-end');
require('@babel/runtime-corejs3/core-js/instance/pad-start');
require('@babel/runtime-corejs3/core-js/instance/trim-end');
require('@babel/runtime-corejs3/core-js/instance/trim-left');
require('@babel/runtime-corejs3/core-js/instance/trim-right');
require('@babel/runtime-corejs3/core-js/instance/trim-start');
require('@babel/runtime-corejs3/core-js/symbol/for');
require('@babel/runtime-corejs3/core-js/symbol/key-for');
require('@babel/runtime-corejs3/core-js/object/prevent-extensions');
require('@babel/runtime-corejs3/core-js/object/seal');
require('@babel/runtime-corejs3/core-js/object/get-prototype-of');
require('@babel/runtime-corejs3/core-js/symbol/replace');
require('@babel/runtime-corejs3/core-js/instance/bind');
require('@babel/runtime-corejs3/core-js/instance/splice');
require('@babel/runtime-corejs3/core-js/instance/repeat');
require('@babel/runtime-corejs3/core-js/instance/reverse');

var noMultipleEmptyLines = utils.createRule({
  name: "no-multiple-empty-lines",
  package: "js",
  meta: {
    type: "layout",
    docs: {
      description: "Disallow multiple empty lines"
    },
    fixable: "whitespace",
    schema: [{
      type: "object",
      properties: {
        max: {
          type: "integer",
          minimum: 0
        },
        maxEOF: {
          type: "integer",
          minimum: 0
        },
        maxBOF: {
          type: "integer",
          minimum: 0
        }
      },
      required: ["max"],
      additionalProperties: false
    }],
    messages: {
      blankBeginningOfFile: "Too many blank lines at the beginning of file. Max of {{max}} allowed.",
      blankEndOfFile: "Too many blank lines at the end of file. Max of {{max}} allowed.",
      consecutiveBlank: "More than {{max}} blank {{pluralizedLines}} not allowed."
    }
  },
  create(context) {
    var _context;
    let max = 2;
    let maxEOF = max;
    let maxBOF = max;
    if (context.options.length && context.options[0]) {
      max = context.options[0].max;
      maxEOF = typeof context.options[0].maxEOF !== "undefined" ? context.options[0].maxEOF : max;
      maxBOF = typeof context.options[0].maxBOF !== "undefined" ? context.options[0].maxBOF : max;
    }
    const sourceCode = context.sourceCode;
    const allLines = sourceCode.lines[sourceCode.lines.length - 1] === "" ? _sliceInstanceProperty(_context = sourceCode.lines).call(_context, 0, -1) : sourceCode.lines;
    const templateLiteralLines = /* @__PURE__ */new _Set();
    return {
      TemplateLiteral(node) {
        var _context2;
        _forEachInstanceProperty(_context2 = node.quasis).call(_context2, literalPart => {
          for (let ignoredLine = literalPart.loc.start.line; ignoredLine < literalPart.loc.end.line; ignoredLine++) templateLiteralLines.add(ignoredLine);
        });
      },
      "Program:exit": function (node) {
        var _context3, _context4;
        return _reduceInstanceProperty(_context3 = _concatInstanceProperty(_context4 = _reduceInstanceProperty(allLines).call(allLines, (nonEmptyLineNumbers, line, index) => {
          if (_trimInstanceProperty(line).call(line) || templateLiteralLines.has(index + 1)) nonEmptyLineNumbers.push(index + 1);
          return nonEmptyLineNumbers;
        }, [])).call(_context4, allLines.length + 1)).call(_context3, (lastLineNumber, lineNumber) => {
          let messageId, maxAllowed;
          if (lastLineNumber === 0) {
            messageId = "blankBeginningOfFile";
            maxAllowed = maxBOF;
          } else if (lineNumber === allLines.length + 1) {
            messageId = "blankEndOfFile";
            maxAllowed = maxEOF;
          } else {
            messageId = "consecutiveBlank";
            maxAllowed = max;
          }
          if (lineNumber - lastLineNumber - 1 > maxAllowed) {
            context.report({
              node,
              loc: {
                start: {
                  line: lastLineNumber + maxAllowed + 1,
                  column: 0
                },
                end: {
                  line: lineNumber,
                  column: 0
                }
              },
              messageId,
              data: {
                max: maxAllowed,
                pluralizedLines: maxAllowed === 1 ? "line" : "lines"
              },
              fix(fixer) {
                const rangeStart = sourceCode.getIndexFromLoc({
                  line: lastLineNumber + 1,
                  column: 0
                });
                const lineNumberAfterRemovedLines = lineNumber - maxAllowed;
                const rangeEnd = lineNumberAfterRemovedLines <= allLines.length ? sourceCode.getIndexFromLoc({
                  line: lineNumberAfterRemovedLines,
                  column: 0
                }) : sourceCode.text.length;
                return fixer.removeRange([rangeStart, rangeEnd]);
              }
            });
          }
          return lineNumber;
        }, 0);
      }
    };
  }
});

module.exports = noMultipleEmptyLines;