gow can be used in place of go and will re-run the command every time a *.go file is modified.

gow.sh

# watch/re-run go command
# Demo http://ascii.io/a/3049

gow () {
  while true; do
    clear
    echo "go $@"
    go "$@"
    if [ $? -eq 0 ]; then break; fi
    inotifywait -e modify *.go 2> /dev/null
  done
}