some error with the 'ln' scripts

anybody is familiar with the etcd project? Or we'd better forget the project when talk about this issue. The issue is

$ build
ln: `gopath/src/github.com/coreos/etcd': cannot overwrite directory

when exec the build shell
and the content is:

#!/bin/sh -e

if [ ! -h gopath/src/github.com/coreos/etcd ]; then
	mkdir -p gopath/src/github.com/coreos/
	ln -s ../../../.. gopath/src/github.com/coreos/etcd
fi

export GOBIN=${PWD}/bin
export GOPATH=${PWD}/gopath
export GOFMTPATH="./bench ./config ./discovery ./etcd ./error ./http ./log main.go ./metrics ./mod ./server ./store ./tests"

# Don't surprise user by formatting their codes by stealth
if [ "--fmt" = "$1" ]; then
	gofmt -s -w -l $GOFMTPATH
fi

go install github.com/coreos/etcd
go install github.com/coreos/etcd/bench

Some addition:
My system is windows 7
I run the shell on git bash.
issue reproduce:

step1: open the git bash
step2: git clone git@github.com:coreos/etcd.git
step3: cd etcd
step4: build

As mentioned in "Git Bash Shell fails to create symbolic links" (since you are using the script in a git bash on Windows 7)

> the ln that shipped with msysGit simply tries to copy its arguments, rather than fiddle with links. This is because links only work (sort of) on NTFS filesystems, and the MSYS team didn't want to reimplement ln.
>
> A workaround is to run mklink from Bash.
This also allows you to create either a Symlink or a Junction.

So 'ln' wouldn't work as expected by default, in the old shell that ships with Git for Windows.

Here's solution. Tbh it is a workaround, but since you're on Windows, I don't see another way.

Start a command line, and enter there to the directory with the script. There should be a path gopath/src/github.com/coreos/ (if no such a path, you must create it). Next issue a command

mklink /D "gopath/src/github.com/coreos/etcd" "../../../../"

Next you should edit the build script to delete a lines with creation symlink and a directory. E.g.

#!/bin/sh -e

export GOBIN=${PWD}/bin
export GOPATH=${PWD}/gopath
export GOFMTPATH="./bench ./config ./discovery ./etcd ./error ./http ./log main.go ./metrics ./mod ./server ./store ./tests"

# Don't surprise user by formatting their codes by stealth
if [ "--fmt" = "$1" ]; then
    gofmt -s -w -l $GOFMTPATH
fi

go install github.com/coreos/etcd
go install github.com/coreos/etcd/bench

Note, that I am just removed 4 lines of code. Next you run the script, and this should work.

You shouldn't be using git clone and the build sh script. Use the go get command. For example, on Windows 7,

Microsoft Windows [Version 6.1.7601]
C:\>set gopath
GOPATH=C:\gopath
C:\>go version
go version go1.3 windows/amd64
C:\>go get -v -u github.com/coreos/etcd
github.com/coreos/etcd (download)
github.com/coreos/etcd/third_party/bitbucket.org/kardianos/osext
github.com/coreos/etcd/pkg/strings
github.com/coreos/etcd/error
github.com/coreos/etcd/third_party/github.com/coreos/go-etcd/etcd
github.com/coreos/etcd/http
github.com/coreos/etcd/third_party/github.com/coreos/go-log/log
github.com/coreos/etcd/third_party/github.com/rcrowley/go-metrics
github.com/coreos/etcd/mod/dashboard/resources
github.com/coreos/etcd/log
github.com/coreos/etcd/third_party/github.com/gorilla/context
github.com/coreos/etcd/third_party/github.com/gorilla/mux
github.com/coreos/etcd/mod/dashboard
github.com/coreos/etcd/discovery
github.com/coreos/etcd/pkg/btrfs
github.com/coreos/etcd/pkg/http
github.com/coreos/etcd/third_party/code.google.com/p/gogoprotobuf/proto
github.com/coreos/etcd/mod/leader/v2
github.com/coreos/etcd/mod/lock/v2
github.com/coreos/etcd/metrics
github.com/coreos/etcd/third_party/github.com/mreiferson/go-httpclient
github.com/coreos/etcd/mod
github.com/coreos/etcd/third_party/github.com/BurntSushi/toml
github.com/coreos/etcd/third_party/github.com/goraft/raft/protobuf
github.com/coreos/etcd/third_party/github.com/goraft/raft
github.com/coreos/etcd/store
github.com/coreos/etcd/server/v1
github.com/coreos/etcd/server/v2
github.com/coreos/etcd/store/v2
github.com/coreos/etcd/server
github.com/coreos/etcd/config
github.com/coreos/etcd/etcd
github.com/coreos/etcd
C:\>