error when comparing with devel

[gyuho]

$ godep restore
godep: WARNING: Go version (devel) & $GO15VENDOREXPERIMENT= wants to enable the vendor experiment, but disabling because a Godep workspace (Godeps/_workspace) exists
godep: Error comparing go1.7 to devel

https://travis-ci.org/coreos/etcd-play/jobs/121345461

I think godep fails when it tries to compare go1.7 with devel?

Please let me know if I can provide more information.

Thanks!

[freeformz]

Ugh. I'm not sure how to ask the go command if it's go1.7 or not while it's in "devel" mode.

[freeformz]

I could at this point just assume that anything that reports "devel" is go1.7 though.

[freeformz]

The go tool uses a build.Context.ReleaseTags slice and go1.7 has been added in devel. To take a "guess" at this I could compile/run this code with the current go version and take the left most element of the array. This is likely to work, until the go team changes the order of this slice for any random reason.

package main

import (
  "fmt"
  "go/build"
)

func main() {
  fmt.Println(build.Default.ReleaseTags[len(build.Default.ReleaseTags)-1])
}

That's super fragile, but so is having to say deal with what the definition of "devel" is.

Thoughts?

[freeformz]

I could also parse the date returned by version in the devel case and hard code in the dates the tree was opened. This may then break every major cycle though.