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, 88 insertions, 0 deletions

diff --git a/tools/node_modules/eslint/lib/rules/dot-location.js b/tools/node_modules/eslint/lib/rules/dot-location.js
new file mode 100644
index 0000000000..60f4af7013
--- /dev/null
+++ b/tools/node_modules/eslint/lib/rules/dot-location.js
@@ -0,0 +1,88 @@
+/**
+ * @fileoverview Validates newlines before and after dots
+ * @author Greg Cochard
+ */
+
+"use strict";
+
+const astUtils = require("../ast-utils");
+
+//------------------------------------------------------------------------------
+// Rule Definition
+//------------------------------------------------------------------------------
+
+module.exports = {
+    meta: {
+        docs: {
+            description: "enforce consistent newlines before and after dots",
+            category: "Best Practices",
+            recommended: false
+        },
+
+        schema: [
+            {
+                enum: ["object", "property"]
+            }
+        ],
+
+        fixable: "code"
+    },
+
+    create(context) {
+
+        const config = context.options[0];
+
+        // default to onObject if no preference is passed
+        const onObject = config === "object" || !config;
+
+        const sourceCode = context.getSourceCode();
+
+        /**
+         * Reports if the dot between object and property is on the correct loccation.
+         * @param {ASTNode} obj The object owning the property.
+         * @param {ASTNode} prop The property of the object.
+         * @param {ASTNode} node The corresponding node of the token.
+         * @returns {void}
+         */
+        function checkDotLocation(obj, prop, node) {
+            const dot = sourceCode.getTokenBefore(prop);
+            const textBeforeDot = sourceCode.getText().slice(obj.range[1], dot.range[0]);
+            const textAfterDot = sourceCode.getText().slice(dot.range[1], prop.range[0]);
+
+            if (dot.type === "Punctuator" && dot.value === ".") {
+                if (onObject) {
+                    if (!astUtils.isTokenOnSameLine(obj, dot)) {
+                        const neededTextAfterObj = astUtils.isDecimalInteger(obj) ? " " : "";
+
+                        context.report({
+                            node,
+                            loc: dot.loc.start,
+                            message: "Expected dot to be on same line as object.",
+                            fix: fixer => fixer.replaceTextRange([obj.range[1], prop.range[0]], `${neededTextAfterObj}.${textBeforeDot}${textAfterDot}`)
+                        });
+                    }
+                } else if (!astUtils.isTokenOnSameLine(dot, prop)) {
+                    context.report({
+                        node,
+                        loc: dot.loc.start,
+                        message: "Expected dot to be on same line as property.",
+                        fix: fixer => fixer.replaceTextRange([obj.range[1], prop.range[0]], `${textBeforeDot}${textAfterDot}.`)
+                    });
+                }
+            }
+        }
+
+        /**
+         * Checks the spacing of the dot within a member expression.
+         * @param {ASTNode} node The node to check.
+         * @returns {void}
+         */
+        function checkNode(node) {
+            checkDotLocation(node.object, node.property, node);
+        }
+
+        return {
+            MemberExpression: checkNode
+        };
+    }
+};