The fast-install.sh depends Go

[michilu]

https://bitbucket.org/ymotongpoo/goenv/raw/master/shellscripts/fast-install.sh

I seems it have to checking the exists Go.

if ! type go 2>&1 > /dev/null; then
  echo "[goenv] To get goenv, install go. https://golang.org/dl/"
  exit 0
fi

[Yoshifumi YAMAGUCHI]

Fast install depends Go as written in README. closing.