private static void ModifyEnvironment()

in SmvInterceptor/SmvInterceptor.cs [438:488]
36 lines of code
12 McCabe index (conditional complexity)

        private static void ModifyEnvironment(XmlNode launchNode, bool stripPath)
        {
            // Remove the tool from the path
            if (stripPath)
            {
                // Canonize the intercept dir
                string canonizedInterceptDir = CanonizePath(interceptDir);

                // StringBuilder for the new path to be rebuilt from pieces
                StringBuilder newPath = new StringBuilder();
                string[] pathPieces = Environment.GetEnvironmentVariable("PATH").Split(';');

                // Loop through each piece
                foreach (string piece in pathPieces)
                {
                    // Skip empty pieces
                    if (piece.Length < 1)
                        continue;

                    // Canonize this piece.  NOTE: This will convert a relative path into a full path, which could cause wonkiness
                    string canonPiece = Path.GetFullPath(CanonizePath(piece)).ToLowerInvariant();
                    if (canonPiece != null && canonPiece.Length > 0 && canonPiece != canonizedInterceptDir)
                    {
                        if (newPath.Length > 0)
                            newPath.Append(";");

                        newPath.Append(piece);
                    }
                }

                // Set final PATH into environment
                Environment.SetEnvironmentVariable("PATH", newPath.ToString());

                if (debugSpew)
                    Console.WriteLine("PATH = {0}", Environment.GetEnvironmentVariable("PATH"));
            }

            // Process any extra environment variables in the launchNode
            if (launchNode != null)
            {
                foreach (XmlNode node in launchNode.SelectNodes("ENV"))
                {
                    foreach (XmlAttribute attrib in node.Attributes)
                    {
                        string name = attrib.Name, value = attrib.Value;
                        value = Environment.ExpandEnvironmentVariables(value);
                        Environment.SetEnvironmentVariable(name, value);
                    }
                }
            }
        }