Add deprecate warning for convertToContext

lib/repl.js

@@ -1195,6 +1195,35 @@ function regexpEscape(s) {
   return s.replace(/[-[\]{}()*+?.,\\^$|#\s]/g, '\\$&');
 }
 
+
+/**
+ * Converts commands that use var and function <name>() to use the
+ * local exports.context when evaled. This provides a local context
+ * on the REPL.
+ *
+ * @param {String} cmd The cmd to convert.
+ * @return {String} The converted command.
+ */
+REPLServer.prototype.convertToContext = util.deprecate(function(cmd) {
+  const scopeVar = /^\s*var\s*([_\w\$]+)(.*)$/m;
+  const scopeFunc = /^\s*function\s*([_\w\$]+)/;
+  var matches;
+
+  // Replaces: var foo = "bar";  with: self.context.foo = bar;
+  matches = scopeVar.exec(cmd);
+  if (matches && matches.length === 3) {
+    return 'self.context.' + matches[1] + matches[2];
+  }
+
+  // Replaces: function foo() {};  with: foo = function foo() {};
+  matches = scopeFunc.exec(this.bufferedCommand);
+  if (matches && matches.length === 2) {
+    return matches[1] + ' = ' + this.bufferedCommand;
+  }
+
+  return cmd;
+}, 'replServer.convertToContext will be removed in v8.0.0');
+
 function bailOnIllegalToken(parser) {
   return parser._literal === null &&
          !parser.blockComment &&