automatic detect gopath

.bashrc

function addgopath(){                                                                                                                                                                                         
    cwd=$(pwd)                                                                                                                                                                                                
    newpath=""                                                                                                                                                                                                
    for tdir in `ls`;do                                                                                                                                                                                       
        if [ "$tdir" = "src" ];then                                                                                                                                                                           
            newpath=${cwd}                                                                                                                                                                                    
            break                                                                                                                                                                                             
        fi                                                                                                                                                                                                    
    done                                                                                                                                                                                                      
                                                                                                                                                                                                              
    if [ -z $newpath ];then                                                                                                                                                                                   
        temppath=${cwd}                                                                                                                                                                                       
        while [ ${temppath} != "/" ];do                                                                                                                                                                      
            base=$(basename ${temppath})                                                                                                                                                                      
            dir=$(dirname ${temppath})                                                                                                                                                                        
            if [ "${base}" = "src" ];then                                                                                                                                                                     
                newpath=${dir}                                                                                                                                                                                
                break                                                                                                                                                                                         
            fi                                                                                                                                                                                                
            temppath=${dir}                                                                                                                                                                                   
        done                                                                                                                                                                                                  
    fi                                                                                                                                                                                                        
                                                                                                                                                                                                              
    if [ ! -z ${newpath} ];then                                                                                                                                                                               
        echo "export ${newpath}:${GOPATH}"                                                                                                                                                                    
        export GOPATH=${newpath}:${GOPATH}                                                                                                                                                                    
    else                                                                                                                                                                                                      
        echo "no valid GOPATH found"                                                                                                                                                                          
    fi                                                                                                                                                                                                        
}