--- /dev/null
+"use strict";
+
+const _ = require("lodash");
+const beforeBlockString = require("../../utils/beforeBlockString");
+const blockString = require("../../utils/blockString");
+const isSingleLineString = require("../../utils/isSingleLineString");
+const report = require("../../utils/report");
+const ruleMessages = require("../../utils/ruleMessages");
+const validateOptions = require("../../utils/validateOptions");
+
+const ruleName = "declaration-block-single-line-max-declarations";
+
+const messages = ruleMessages(ruleName, {
+ expected: max =>
+ `Expected no more than ${max} ${max === 1 ? "declaration" : "declarations"}`
+});
+
+const rule = function(quantity) {
+ return (root, result) => {
+ const validOptions = validateOptions(result, ruleName, {
+ actual: quantity,
+ possible: [_.isNumber]
+ });
+ if (!validOptions) {
+ return;
+ }
+
+ root.walkRules(rule => {
+ if (!isSingleLineString(blockString(rule))) {
+ return;
+ }
+ if (!rule.nodes) {
+ return;
+ }
+
+ const decls = rule.nodes.filter(node => node.type === "decl");
+
+ if (decls.length <= quantity) {
+ return;
+ }
+
+ report({
+ message: messages.expected(quantity),
+ node: rule,
+ index: beforeBlockString(rule, { noRawBefore: true }).length,
+ result,
+ ruleName
+ });
+ });
+ };
+};
+
+rule.ruleName = ruleName;
+rule.messages = messages;
+module.exports = rule;