MultipleGoRoots

개요

Go 해킹 방법 및 여러 $GOROOT 워크스페이스를 가지는 방법에 대한 팁입니다...

때때로 여러분은 Go tree의 여러 사본을 확인인 할 필요가 생깁니다. 아마 여러분은 여러 핵심 라이브러리들을 한꺼번에 변경하고 독립적으로 테스트할 필요가 있을 것입니다.

여러분이 $HOME/go1, $HOME/go2 등의 tree를 확인했다고 가정 해 봅시다. (딱히 이름이 중요한건 아닙니다.) While you're working in each tree, it's important that you always set GOROOT to the correct tree or unexpected things will happen, like binaries will be built from sources other than the ones you've just edited. Such mistakes can be time-consuming to notice, and it's easy to forget to update GOPATH when you change directories. The following trick may be helpful.

Define a script called go, and ensure its directory is on your PATH or define a shell alias go that points to it. In the script, set the GOROOT and (if you like) GOPATH environment variables to appropriate values determined from your current working directory. Then exec the real go command.

예시:

#!/bin/sh
# Set GOROOT to the innermost enclosing directory containing
# an AUTHORS file.  Set GOPATH to its child called "got".
dir=$(pwd)
while true; do
  if [ -f "$dir/AUTHORS" ]; then
    export "GOROOT=$dir"
    export "GOPATH=$GOROOT/got"
    echo "GOROOT=$GOROOT" >&2
    echo "GOPATH=$GOPATH" >&2
    break
  fi
  dir=$(dirname "$dir")
  if [ "$dir" = / ]; then
    echo "Can't locate GOROOT". >&2
    exit 1
  fi
done
exec "$GOROOT/bin/go" "$@"