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node_modules/stylelint/lib/rules/at-rule-empty-line-before/index.mjs

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+import fixEmptyLinesBefore from '../../utils/fixEmptyLinesBefore.mjs';
+import getPreviousNonSharedLineCommentNode from '../../utils/getPreviousNonSharedLineCommentNode.mjs';
+import hasEmptyLine from '../../utils/hasEmptyLine.mjs';
+import isAfterComment from '../../utils/isAfterComment.mjs';
+import { isAtRule } from '../../utils/typeGuards.mjs';
+import isBlocklessAtRuleAfterBlocklessAtRule from '../../utils/isBlocklessAtRuleAfterBlocklessAtRule.mjs';
+import isBlocklessAtRuleAfterSameNameBlocklessAtRule from '../../utils/isBlocklessAtRuleAfterSameNameBlocklessAtRule.mjs';
+import isFirstNested from '../../utils/isFirstNested.mjs';
+import isFirstNodeOfRoot from '../../utils/isFirstNodeOfRoot.mjs';
+import isStandardSyntaxAtRule from '../../utils/isStandardSyntaxAtRule.mjs';
+import { isString } from '../../utils/validateTypes.mjs';
+import optionsMatches from '../../utils/optionsMatches.mjs';
+import report from '../../utils/report.mjs';
+import ruleMessages from '../../utils/ruleMessages.mjs';
+import validateOptions from '../../utils/validateOptions.mjs';
+
+const ruleName = 'at-rule-empty-line-before';
+
+const messages = ruleMessages(ruleName, {
+	expected: 'Expected empty line before at-rule',
+	rejected: 'Unexpected empty line before at-rule',
+});
+
+const meta = {
+	url: 'https://stylelint.io/user-guide/rules/at-rule-empty-line-before',
+	fixable: true,
+};
+
+/** @type {import('stylelint').CoreRules[ruleName]} */
+const rule = (primary, secondaryOptions, context) => {
+	return (root, result) => {
+		const validOptions = validateOptions(
+			result,
+			ruleName,
+			{
+				actual: primary,
+				possible: ['always', 'never'],
+			},
+			{
+				actual: secondaryOptions,
+				possible: {
+					except: [
+						'after-same-name',
+						'inside-block',
+						'blockless-after-same-name-blockless',
+						'blockless-after-blockless',
+						'first-nested',
+					],
+					ignore: [
+						'after-comment',
+						'first-nested',
+						'inside-block',
+						'blockless-after-same-name-blockless',
+						'blockless-after-blockless',
+					],
+					ignoreAtRules: [isString],
+				},
+				optional: true,
+			},
+		);
+
+		if (!validOptions) {
+			return;
+		}
+
+		/** @type {'always' | 'never'} */
+		const expectation = primary;
+
+		root.walkAtRules((atRule) => {
+			const isNested = atRule.parent && atRule.parent.type !== 'root';
+
+			// Ignore the first node
+			if (isFirstNodeOfRoot(atRule)) {
+				return;
+			}
+
+			if (!isStandardSyntaxAtRule(atRule)) {
+				return;
+			}
+
+			// Return early if at-rule is to be ignored
+			if (optionsMatches(secondaryOptions, 'ignoreAtRules', atRule.name)) {
+				return;
+			}
+
+			// Optionally ignore the expectation if the node is blockless
+			if (
+				optionsMatches(secondaryOptions, 'ignore', 'blockless-after-blockless') &&
+				isBlocklessAtRuleAfterBlocklessAtRule(atRule)
+			) {
+				return;
+			}
+
+			// Optionally ignore the node if it is the first nested
+			if (optionsMatches(secondaryOptions, 'ignore', 'first-nested') && isFirstNested(atRule)) {
+				return;
+			}
+
+			// Optionally ignore the expectation if the node is blockless
+			// and following another blockless at-rule with the same name
+			if (
+				optionsMatches(secondaryOptions, 'ignore', 'blockless-after-same-name-blockless') &&
+				isBlocklessAtRuleAfterSameNameBlocklessAtRule(atRule)
+			) {
+				return;
+			}
+
+			// Optionally ignore the expectation if the node is inside a block
+			if (optionsMatches(secondaryOptions, 'ignore', 'inside-block') && isNested) {
+				return;
+			}
+
+			// Optionally ignore the expectation if a comment precedes this node
+			if (optionsMatches(secondaryOptions, 'ignore', 'after-comment') && isAfterComment(atRule)) {
+				return;
+			}
+
+			const hasEmptyLineBefore = hasEmptyLine(atRule.raws.before);
+			let expectEmptyLineBefore = expectation === 'always';
+
+			// Optionally reverse the expectation if any exceptions apply
+			if (
+				(optionsMatches(secondaryOptions, 'except', 'after-same-name') &&
+					isAtRuleAfterSameNameAtRule(atRule)) ||
+				(optionsMatches(secondaryOptions, 'except', 'inside-block') && isNested) ||
+				(optionsMatches(secondaryOptions, 'except', 'first-nested') && isFirstNested(atRule)) ||
+				(optionsMatches(secondaryOptions, 'except', 'blockless-after-blockless') &&
+					isBlocklessAtRuleAfterBlocklessAtRule(atRule)) ||
+				(optionsMatches(secondaryOptions, 'except', 'blockless-after-same-name-blockless') &&
+					isBlocklessAtRuleAfterSameNameBlocklessAtRule(atRule))
+			) {
+				expectEmptyLineBefore = !expectEmptyLineBefore;
+			}
+
+			// Return if the expectation is met
+			if (expectEmptyLineBefore === hasEmptyLineBefore) {
+				return;
+			}
+
+			const message = expectEmptyLineBefore ? messages.expected : messages.rejected;
+			const action = expectEmptyLineBefore ? 'add' : 'remove';
+
+			// Fix
+			const fix = () =>
+				fixEmptyLinesBefore({
+					node: atRule,
+					newline: context.newline,
+					action,
+				});
+
+			report({
+				message,
+				node: atRule,
+				result,
+				ruleName,
+				fix,
+			});
+		});
+	};
+};
+
+/**
+ * @param {import('postcss').AtRule} atRule
+ */
+function isAtRuleAfterSameNameAtRule(atRule) {
+	const previousNode = getPreviousNonSharedLineCommentNode(atRule);
+
+	return previousNode && isAtRule(previousNode) && previousNode.name === atRule.name;
+}
+
+rule.ruleName = ruleName;
+rule.messages = messages;
+rule.meta = meta;
+export default rule;