| "use strict"; |
| |
| const addEmptyLineBefore = require("../../utils/addEmptyLineBefore"); |
| const hasEmptyLine = require("../../utils/hasEmptyLine"); |
| const isAfterComment = require("../../utils/isAfterComment"); |
| const isFirstNested = require("../../utils/isFirstNested"); |
| const isFirstNodeOfRoot = require("../../utils/isFirstNodeOfRoot"); |
| const isSharedLineComment = require("../../utils/isSharedLineComment"); |
| const optionsMatches = require("../../utils/optionsMatches"); |
| const removeEmptyLinesBefore = require("../../utils/removeEmptyLinesBefore"); |
| const report = require("../../utils/report"); |
| const ruleMessages = require("../../utils/ruleMessages"); |
| const validateOptions = require("../../utils/validateOptions"); |
| |
| const ruleName = "comment-empty-line-before"; |
| |
| const messages = ruleMessages(ruleName, { |
| expected: "Expected empty line before comment", |
| rejected: "Unexpected empty line before comment" |
| }); |
| |
| const stylelintCommandPrefix = "stylelint-"; |
| |
| const rule = function(expectation, options, context) { |
| return (root, result) => { |
| const validOptions = validateOptions( |
| result, |
| ruleName, |
| { |
| actual: expectation, |
| possible: ["always", "never"] |
| }, |
| { |
| actual: options, |
| possible: { |
| except: ["first-nested"], |
| ignore: ["stylelint-commands", "after-comment"] |
| }, |
| optional: true |
| } |
| ); |
| |
| if (!validOptions) { |
| return; |
| } |
| |
| root.walkComments(comment => { |
| // Ignore the first node |
| if (isFirstNodeOfRoot(comment)) { |
| return; |
| } |
| |
| // Optionally ignore stylelint commands |
| if ( |
| comment.text.indexOf(stylelintCommandPrefix) === 0 && |
| optionsMatches(options, "ignore", "stylelint-commands") |
| ) { |
| return; |
| } |
| |
| // Optionally ignore newlines between comments |
| if ( |
| optionsMatches(options, "ignore", "after-comment") && |
| isAfterComment(comment) |
| ) { |
| return; |
| } |
| |
| // Ignore shared-line comments |
| if (isSharedLineComment(comment)) { |
| return; |
| } |
| |
| // Ignore SCSS comments |
| if (comment.raws.inline || comment.inline) { |
| return; |
| } |
| |
| const expectEmptyLineBefore = (() => { |
| if ( |
| optionsMatches(options, "except", "first-nested") && |
| isFirstNested(comment) |
| ) { |
| return false; |
| } |
| |
| return expectation === "always"; |
| })(); |
| |
| const before = comment.raws.before || ""; |
| const hasEmptyLineBefore = hasEmptyLine(before); |
| |
| // Return if the expectation is met |
| if (expectEmptyLineBefore === hasEmptyLineBefore) { |
| return; |
| } |
| |
| // Fix |
| if (context.fix) { |
| if (expectEmptyLineBefore) { |
| addEmptyLineBefore(comment, context.newline); |
| } else { |
| removeEmptyLinesBefore(comment, context.newline); |
| } |
| |
| return; |
| } |
| |
| const message = expectEmptyLineBefore |
| ? messages.expected |
| : messages.rejected; |
| |
| report({ |
| message, |
| node: comment, |
| result, |
| ruleName |
| }); |
| }); |
| }; |
| }; |
| |
| rule.ruleName = ruleName; |
| rule.messages = messages; |
| module.exports = rule; |