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node_modules/stylelint/lib/rules/rule-nested-empty-line-before/README.md

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+# rule-nested-empty-line-before
+
+***Deprecated: instead use the [rule-empty-line-before](../rule-empty-line-before/README.md).***
+
+Require or disallow an empty line before nested rules.
+
+```css
+@media {
+       /* ← */
+  a {} /* ↑ */
+}      /* ↑ */
+/**       ↑
+ * This line */
+```
+
+## Options
+
+`string`: `"always"|"never"|"always-multi-line"|"never-multi-line"`
+
+### `"always"`
+
+There *must always* be an empty line before rules.
+
+The following patterns are considered warnings:
+
+```css
+@media { a {} }
+```
+
+```css
+@media {
+  a {}
+}
+```
+
+The following patterns are *not* considered warnings:
+
+```css
+@media {
+
+  a {}
+}
+```
+
+### `"never"`
+
+There *must never* be an empty line before rules.
+
+The following patterns are considered warnings:
+
+```css
+@media { a {} }
+```
+
+```css
+@media {
+
+  a {}
+}
+```
+
+The following patterns are *not* considered warnings:
+
+```css
+@media {
+  a {}
+}
+```
+
+### `"always-multi-line"`
+
+There *must always* be an empty line before multi-line rules.
+
+The following patterns are considered warnings:
+
+```css
+@media {
+  a {
+    color: pink;
+    top: 0;
+  }
+}
+```
+
+The following patterns are *not* considered warnings:
+
+```css
+@media {
+
+  a {
+    color: pink;
+    top: 0;
+  }
+}
+```
+
+### `"never-multi-line"`
+
+There *must never* be an empty line before multi-line rules.
+
+The following patterns are considered warnings:
+
+```css
+@media {
+
+  a {
+    color: pink;
+    top: 0;
+  }
+}
+```
+
+The following patterns are *not* considered warnings:
+
+```css
+@media {
+  a {
+    color: pink;
+    top: 0;
+  }
+}
+```
+
+## Optional secondary options
+
+### `except: ["first-nested"]`
+
+Reverse the primary option if the rule is the first in a block.
+
+For example, with `"always"`:
+
+The following patterns are considered warnings:
+
+```css
+@media {
+
+  a {}
+
+  b {}
+
+  c {}
+}
+```
+
+The following patterns are *not* considered warnings:
+
+```css
+@media {
+  a {}
+
+  b {}
+
+  c {}
+}
+```
+
+### `except: ["after-rule"]`
+
+Reverse the primary option if the rule comes after another rule.
+
+For example, with `"always"`:
+
+The following patterns are considered warnings:
+
+```css
+@media {
+  color: red;
+  a {}
+  b {}
+  c {}
+}
+```
+
+The following patterns are *not* considered warnings:
+
+```css
+@media {
+  color: red;
+
+  a {}
+  b {}
+  c {}
+}
+```
+
+### `ignore: ["after-comment"]`
+
+Ignore rules that come after a comment.
+
+The following patterns are *not* considered warnings:
+
+```css
+@media {
+  /* comment */
+  a {}
+}
+```
+
+```css
+@media {
+  /* comment */
+
+  a {}
+}
+```

node_modules/stylelint/lib/rules/rule-nested-empty-line-before/index.js

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+"use strict"
+
+const isStandardSyntaxRule = require("../../utils/isStandardSyntaxRule")
+const ruleMessages = require("../../utils/ruleMessages")
+const validateOptions = require("../../utils/validateOptions")
+const checkRuleEmptyLineBefore = require("../checkRuleEmptyLineBefore")
+
+const ruleName = "rule-nested-empty-line-before"
+
+const messages = ruleMessages(ruleName, {
+  expected: "Expected empty line before nested rule",
+  rejected: "Unexpected empty line before nested rule",
+})
+
+const rule = function (expectation, options) {
+  return (root, result) => {
+    const validOptions = validateOptions(result, ruleName, {
+      actual: expectation,
+      possible: [
+        "always",
+        "never",
+        "always-multi-line",
+        "never-multi-line",
+      ],
+    }, {
+      actual: options,
+      possible: {
+        ignore: ["after-comment"],
+        except: [
+          "first-nested",
+          "after-comment",
+          "after-rule",
+        ],
+      },
+      optional: true,
+    })
+    if (!validOptions) {
+      return
+    }
+
+    result.warn((
+      `'${ruleName}' has been deprecated and in 8.0 will be removed. Instead use 'rule-empty-line-before'.`
+    ), {
+      stylelintType: "deprecation",
+      stylelintReference: `https://stylelint.io/user-guide/rules/${ruleName}/`,
+    })
+
+    root.walkRules(rule => {
+      if (!isStandardSyntaxRule(rule)) {
+        return
+      }
+
+      // Only attend to nested rule sets
+      if (rule.parent === root) {
+        return
+      }
+
+      checkRuleEmptyLineBefore({ rule, expectation, options, result, messages, checkedRuleName: ruleName })
+    })
+  }
+}
+
+rule.ruleName = ruleName
+rule.messages = messages
+module.exports = rule