github.com/Sirupsen/logrus (uppercase) recently renamed to github.com/sirupsen/logrus (lowercase)

• see Rename back to Sirupsen/logrus sirupsen/logrus#570

Since one of our transitive dependencies switched to the new name, I was forced to switch as well.

So, I've renamed all the imports in our project to the new lowercase logrus and I've also updated the Gopkg.toml file manually.

But running dep ensure -v failed with this error:

Solver wall times by segment:
     b-source-exists: 1m26.904688163s
              b-gmal:   28.462179459s
         b-list-pkgs:   10.529860179s
  b-deduce-proj-root:    332.755275ms
         select-root:     67.282398ms
             satisfy:     50.599636ms
         select-atom:     43.949387ms
            new-atom:      9.711577ms
               other:       454.893µs
     b-list-versions:       140.458µs
            add-atom:        61.222µs

  TOTAL: 2m6.401682647s

grouped write of manifest, lock and vendor: error while writing out vendor tree: error while exporting github.com/sirupsen/logrus: /var/folders/hr/5zb8r0yx4sv4_1dc0rlccflm0000gn/T/dep672844279/vendor/github.com/sirupsen/logrus/.gitignore already exists, no checkout

Yes, I'm on MacOS (which has case-insensitive file system), so checking out the two conflicting repos is not possible.

Note: Actually, even git itself has troubles renaming a single directory name to lowercase. What a bummer.

So I'm thinking there is probably yet another transitive dependency that is still importing the old uppercase repository and golang/dep is cloning it while resolving the dependencies. But which one? The error message coming from golang/dep is not useful at all.

I'm gonna dig deeper into my vendor/ directory and try to debug the problem and report back.
Any guidance / feedback appreciated, though.

What did you expect to see?

Useful error message on conflicting (lowercase/uppercase) repositories. I would like to know which transitive dependency introduced the conflict, if possible.

What version of Go and dep are you using?

go version go1.9beta1 darwin/amd64

dep v0.1.0-206-ge99676b

What dep command did you run?

dep ensure -v