WIP - add extractor, generate snippet_data

node_modules/eslint-plugin-react/lib/rules/jsx-first-prop-new-line.js

@@ -0,0 +1,70 @@
+/**
+ * @fileoverview Ensure proper position of the first property in JSX
+ * @author Joachim Seminck
+ */
+
+'use strict';
+
+const docsUrl = require('../util/docsUrl');
+
+// ------------------------------------------------------------------------------
+// Rule Definition
+// ------------------------------------------------------------------------------
+
+module.exports = {
+  meta: {
+    docs: {
+      description: 'Ensure proper position of the first property in JSX',
+      category: 'Stylistic Issues',
+      recommended: false,
+      url: docsUrl('jsx-first-prop-new-line')
+    },
+    fixable: 'code',
+
+    schema: [{
+      enum: ['always', 'never', 'multiline', 'multiline-multiprop']
+    }]
+  },
+
+  create(context) {
+    const configuration = context.options[0] || 'multiline-multiprop';
+
+    function isMultilineJSX(jsxNode) {
+      return jsxNode.loc.start.line < jsxNode.loc.end.line;
+    }
+
+    return {
+      JSXOpeningElement(node) {
+        if (
+          (configuration === 'multiline' && isMultilineJSX(node)) ||
+          (configuration === 'multiline-multiprop' && isMultilineJSX(node) && node.attributes.length > 1) ||
+          (configuration === 'always')
+        ) {
+          node.attributes.some((decl) => {
+            if (decl.loc.start.line === node.loc.start.line) {
+              context.report({
+                node: decl,
+                message: 'Property should be placed on a new line',
+                fix(fixer) {
+                  return fixer.replaceTextRange([node.name.range[1], decl.range[0]], '\n');
+                }
+              });
+            }
+            return true;
+          });
+        } else if (configuration === 'never' && node.attributes.length > 0) {
+          const firstNode = node.attributes[0];
+          if (node.loc.start.line < firstNode.loc.start.line) {
+            context.report({
+              node: firstNode,
+              message: 'Property should be placed on the same line as the component declaration',
+              fix(fixer) {
+                return fixer.replaceTextRange([node.name.range[1], firstNode.range[0]], ' ');
+              }
+            });
+          }
+        }
+      }
+    };
+  }
+};