go wrapper to automatically set GOPATH

go

#!/bin/sh

get_inode() {
	stat -c '%i' "$1"
}

find_go() {
	self=`get_inode $(readlink -m "$1")`

	local IFS=:
	for d in $PATH ; do
		fn="$d/go"
		if test -x $d/go ; then
			inode=`get_inode "$fn"`
			if test "$inode" != "$self" ; then
				echo "$fn"
				return
			fi
		fi
	done
}

find_gopath() {
	local OLDPWD=$PWD
	local gopath=""

	while true ; do
		if test -d src ; then
			gopath=$PWD
			break
		fi

		if test "$PWD" = / ; then
			break
		fi

		cd ..
	done

	cd "$OLDPWD"
	echo "$gopath"
}

go=`find_go "$0"`

if test -z "$go" ; then
	echo "E: go program not found. Stop."
	exit 1
fi

if test -z "$GOPATH" ; then
	GOPATH=`find_gopath`

	if test -z "$GOPATH" ; then
		echo "W: GOPATH not found."
	else
		export GOPATH
	fi
fi

exec $go "$@"