dep ensure fails with 'already exists, no checkout'

[gcmurphy]

On my Mac OSX dep fails to run cleanly with tls-observatory as a dependency. ( I was not able to reproduce on my Linux machine). Any ideas on this?

What version of dep are you using (dep version)?

Dep version

git -C $GOPATH/src/github.com/golang/dep describe --tags
v0.4.1-113-g5bdae264

Go verison

go version
go version go1.9.4 darwin/amd64

What dep command did you run?

dep ensure fails on my machine against this demo:

//➜  demo cat main.go 
package main

import (
    "github.com/mozilla/tls-observatory/constants"
)

func main(){
    for cipher := constants.Ciphers {
        println(cipher)
    }
}

What did you expect to see?

$ dep init
Using ^1.2.39 as constraint for direct dep github.com/mozilla/tls-observatory
Locking in 1.2.39 (a64118f) for direct dep github.com/mozilla/tls-observatory

$ echo $? 
0

What did you see instead?

➜  demo dep init                                                                   
  Using ^1.2.39 as constraint for direct dep github.com/mozilla/tls-observatory
  Locking in 1.2.39 (a64118f) for direct dep github.com/mozilla/tls-observatory
init failed: unable to write the manifest, lock and vendor directory to disk: error while writing out vendor tree: failed to write dep tree: failed to export github.com/mozilla/tls-observatory: /var/folders/gs/ljbtmmzj1hs1f2r4m1w371ph0000gn/T/dep991018131/vendor/github.com/mozilla/tls-observatory/vendor/github.com/sirupsen/logrus/.travis.yml already exists, no checkout
/var/folders/gs/ljbtmmzj1hs1f2r4m1w371ph0000gn/T/dep991018131/vendor/github.com/mozilla/tls-observatory/vendor/github.com/sirupsen/logrus/CHANGELOG.md already exists, no checkout
/var/folders/gs/ljbtmmzj1hs1f2r4m1w371ph0000gn/T/dep991018131/vendor/github.com/mozilla/tls-observatory/vendor/github.com/sirupsen/logrus/LICENSE already exists, no checkout
/var/folders/gs/ljbtmmzj1hs1f2r4m1w371ph0000gn/T/dep991018131/vendor/github.com/mozilla/tls-observatory/vendor/github.com/sirupsen/logrus/README.md already exists, no checkout
/var/folders/gs/ljbtmmzj1hs1f2r4m1w371ph0000gn/T/dep991018131/vendor/github.com/mozilla/tls-observatory/vendor/github.com/sirupsen/logrus/alt_exit.go already exists, no checkout
/var/folders/gs/ljbtmmzj1hs1f2r4m1w371ph0000gn/T/dep991018131/vendor/github.com/mozilla/tls-observatory/vendor/github.com/sirupsen/logrus/alt_exit_test.go already exists, no checkout
/var/folders/gs/ljbtmmzj1hs1f2r4m1w371ph0000gn/T/dep991018131/vendor/github.com/mozilla/tls-observatory/vendor/github.com/sirupsen/logrus/appveyor.yml already exists, no checkout
/var/folders/gs/ljbtmmzj1hs1f2r4m1w371ph0000gn/T/dep991018131/vendor/github.com/mozilla/tls-observatory/vendor/github.com/sirupsen/logrus/doc.go already exists, no checkout
/var/folders/gs/ljbtmmzj1hs1f2r4m1w371ph0000gn/T/dep991018131/vendor/github.com/mozilla/tls-observatory/vendor/github.com/sirupsen/logrus/entry.go already exists, no checkout
/var/folders/gs/ljbtmmzj1hs1f2r4m1w371ph0000gn/T/dep991018131/vendor/github.com/mozilla/tls-observatory/vendor/github.com/sirupsen/logrus/entry_test.go already exists, no checkout
/var/folders/gs/ljbtmmzj1hs1f2r4m1w371ph0000gn/T/dep991018131/vendor/github.com/mozilla/tls-observatory/vendor/github.com/sirupsen/logrus/example_basic_test.go already exists, no checkout
/var/folders/gs/ljbtmmzj1hs1f2r4m1w371ph0000gn/T/dep991018131/vendor/github.com/mozilla/tls-observatory/vendor/github.com/sirupsen/logrus/example_hook_test.go already exists, no checkout
/var/folders/gs/ljbtmmzj1hs1f2r4m1w371ph0000gn/T/dep991018131/vendor/github.com/mozilla/tls-observatory/vendor/github.com/sirupsen/logrus/exported.go already exists, no checkout
/var/folders/gs/ljbtmmzj1hs1f2r4m1w371ph0000gn/T/dep991018131/vendor/github.com/mozilla/tls-observatory/vendor/github.com/sirupsen/logrus/formatter.go already exists, no checkout
/var/folders/gs/ljbtmmzj1hs1f2r4m1w371ph0000gn/T/dep991018131/vendor/github.com/mozilla/tls-observatory/vendor/github.com/sirupsen/logrus/formatter_bench_test.go already exists, no checkout
/var/folders/gs/ljbtmmzj1hs1f2r4m1w371ph0000gn/T/dep991018131/vendor/github.com/mozilla/tls-observatory/vendor/github.com/sirupsen/logrus/hook_test.go already exists, no checkout
/var/folders/gs/ljbtmmzj1hs1f2r4m1w371ph0000gn/T/dep991018131/vendor/github.com/mozilla/tls-observatory/vendor/github.com/sirupsen/logrus/hooks.go already exists, no checkout
/var/folders/gs/ljbtmmzj1hs1f2r4m1w371ph0000gn/T/dep991018131/vendor/github.com/mozilla/tls-observatory/vendor/github.com/sirupsen/logrus/hooks/syslog/README.md already exists, no checkout
/var/folders/gs/ljbtmmzj1hs1f2r4m1w371ph0000gn/T/dep991018131/vendor/github.com/mozilla/tls-observatory/vendor/github.com/sirupsen/logrus/hooks/syslog/syslog.go already exists, no checkout
/var/folders/gs/ljbtmmzj1hs1f2r4m1w371ph0000gn/T/dep991018131/vendor/github.com/mozilla/tls-observatory/vendor/github.com/sirupsen/logrus/hooks/syslog/syslog_test.go already exists, no checkout
/var/folders/gs/ljbtmmzj1hs1f2r4m1w371ph0000gn/T/dep991018131/vendor/github.com/mozilla/tls-observatory/vendor/github.com/sirupsen/logrus/hooks/test/test.go already exists, no checkout
/var/folders/gs/ljbtmmzj1hs1f2r4m1w371ph0000gn/T/dep991018131/vendor/github.com/mozilla/tls-observatory/vendor/github.com/sirupsen/logrus/hooks/test/test_test.go already exists, no checkout
/var/folders/gs/ljbtmmzj1hs1f2r4m1w371ph0000gn/T/dep991018131/vendor/github.com/mozilla/tls-observatory/vendor/github.com/sirupsen/logrus/json_formatter.go already exists, no checkout
/var/folders/gs/ljbtmmzj1hs1f2r4m1w371ph0000gn/T/dep991018131/vendor/github.com/mozilla/tls-observatory/vendor/github.com/sirupsen/logrus/json_formatter_test.go already exists, no checkout
/var/folders/gs/ljbtmmzj1hs1f2r4m1w371ph0000gn/T/dep991018131/vendor/github.com/mozilla/tls-observatory/vendor/github.com/sirupsen/logrus/logger.go already exists, no checkout
/var/folders/gs/ljbtmmzj1hs1f2r4m1w371ph0000gn/T/dep991018131/vendor/github.com/mozilla/tls-observatory/vendor/github.com/sirupsen/logrus/logger_bench_test.go already exists, no checkout
/var/folders/gs/ljbtmmzj1hs1f2r4m1w371ph0000gn/T/dep991018131/vendor/github.com/mozilla/tls-observatory/vendor/github.com/sirupsen/logrus/logrus.go already exists, no checkout
/var/folders/gs/ljbtmmzj1hs1f2r4m1w371ph0000gn/T/dep991018131/vendor/github.com/mozilla/tls-observatory/vendor/github.com/sirupsen/logrus/logrus_test.go already exists, no checkout
/var/folders/gs/ljbtmmzj1hs1f2r4m1w371ph0000gn/T/dep991018131/vendor/github.com/mozilla/tls-observatory/vendor/github.com/sirupsen/logrus/terminal_bsd.go already exists, no checkout
/var/folders/gs/ljbtmmzj1hs1f2r4m1w371ph0000gn/T/dep991018131/vendor/github.com/mozilla/tls-observatory/vendor/github.com/sirupsen/logrus/terminal_check_appengine.go already exists, no checkout
/var/folders/gs/ljbtmmzj1hs1f2r4m1w371ph0000gn/T/dep991018131/vendor/github.com/mozilla/tls-observatory/vendor/github.com/sirupsen/logrus/terminal_check_notappengine.go already exists, no checkout
/var/folders/gs/ljbtmmzj1hs1f2r4m1w371ph0000gn/T/dep991018131/vendor/github.com/mozilla/tls-observatory/vendor/github.com/sirupsen/logrus/terminal_linux.go already exists, no checkout
/var/folders/gs/ljbtmmzj1hs1f2r4m1w371ph0000gn/T/dep991018131/vendor/github.com/mozilla/tls-observatory/vendor/github.com/sirupsen/logrus/text_formatter.go already exists, no checkout
/var/folders/gs/ljbtmmzj1hs1f2r4m1w371ph0000gn/T/dep991018131/vendor/github.com/mozilla/tls-observatory/vendor/github.com/sirupsen/logrus/text_formatter_test.go already exists, no checkout
/var/folders/gs/ljbtmmzj1hs1f2r4m1w371ph0000gn/T/dep991018131/vendor/github.com/mozilla/tls-observatory/vendor/github.com/sirupsen/logrus/writer.go already exists, no checkout
: exit status 128

$ ls Gopkg.toml
ls: Gopkg.toml: No such file or directory

[gcmurphy]

Possible duplicate of #946.

[gcmurphy]

...errr duplicate of #797