tools: move eslint from tools to tools/node_modules

This is required because we need to add the babel-eslint dependency
and it has to be able to resolve "eslint".
babel-eslint is required to support future ES features such as async
iterators and import.meta.

Refs: https://github.com/nodejs/node/pull/17755
PR-URL: https://github.com/nodejs/node/pull/17820
Reviewed-By: Matteo Collina <matteo.collina@gmail.com>
Reviewed-By: Benjamin Gruenbaum <benjamingr@gmail.com>

1 files changed, 84 insertions, 0 deletions

diff --git a/tools/node_modules/eslint/lib/rules/object-property-newline.js b/tools/node_modules/eslint/lib/rules/object-property-newline.js
new file mode 100644
index 0000000000..0463e389ab
--- /dev/null
+++ b/tools/node_modules/eslint/lib/rules/object-property-newline.js
@@ -0,0 +1,84 @@
+/**
+ * @fileoverview Rule to enforce placing object properties on separate lines.
+ * @author Vitor Balocco
+ */
+
+"use strict";
+
+//------------------------------------------------------------------------------
+// Rule Definition
+//------------------------------------------------------------------------------
+
+module.exports = {
+    meta: {
+        docs: {
+            description: "enforce placing object properties on separate lines",
+            category: "Stylistic Issues",
+            recommended: false
+        },
+
+        schema: [
+            {
+                type: "object",
+                properties: {
+                    allowMultiplePropertiesPerLine: {
+                        type: "boolean"
+                    }
+                },
+                additionalProperties: false
+            }
+        ],
+
+        fixable: "whitespace"
+    },
+
+    create(context) {
+        const allowSameLine = context.options[0] && Boolean(context.options[0].allowMultiplePropertiesPerLine);
+        const errorMessage = allowSameLine
+            ? "Object properties must go on a new line if they aren't all on the same line."
+            : "Object properties must go on a new line.";
+
+        const sourceCode = context.getSourceCode();
+
+        return {
+            ObjectExpression(node) {
+                if (allowSameLine) {
+                    if (node.properties.length > 1) {
+                        const firstTokenOfFirstProperty = sourceCode.getFirstToken(node.properties[0]);
+                        const lastTokenOfLastProperty = sourceCode.getLastToken(node.properties[node.properties.length - 1]);
+
+                        if (firstTokenOfFirstProperty.loc.end.line === lastTokenOfLastProperty.loc.start.line) {
+
+                            // All keys and values are on the same line
+                            return;
+                        }
+                    }
+                }
+
+                for (let i = 1; i < node.properties.length; i++) {
+                    const lastTokenOfPreviousProperty = sourceCode.getLastToken(node.properties[i - 1]);
+                    const firstTokenOfCurrentProperty = sourceCode.getFirstToken(node.properties[i]);
+
+                    if (lastTokenOfPreviousProperty.loc.end.line === firstTokenOfCurrentProperty.loc.start.line) {
+                        context.report({
+                            node,
+                            loc: firstTokenOfCurrentProperty.loc.start,
+                            message: errorMessage,
+                            fix(fixer) {
+                                const comma = sourceCode.getTokenBefore(firstTokenOfCurrentProperty);
+                                const rangeAfterComma = [comma.range[1], firstTokenOfCurrentProperty.range[0]];
+
+                                // Don't perform a fix if there are any comments between the comma and the next property.
+                                if (sourceCode.text.slice(rangeAfterComma[0], rangeAfterComma[1]).trim()) {
+                                    return null;
+                                }
+
+                                return fixer.replaceTextRange(rangeAfterComma, "\n");
+                            }
+                        });
+                    }
+                }
+            }
+        };
+    }
+};