Bash function to easily set the GOPATH from any subdirectory thereof.

setgopath.sh

# Embed this function inside your .bashrc or equivalent.
function setgopath() {
    # Assume we're in the src directory, and strip off src and everything after it.
    DIR=${PWD/src*/}
    if [ -d "$DIR/src" -a -d "$DIR/bin" -a -d "$DIR/pkg" ]; then
        export GOPATH=$DIR
    fi
}