`dep ensure` is broken

[MrHohn]

In the middle of updating vendor, found dep ensure is already broken without any modification to codes:

k8s.io/ingress-gce$ dep ensure -v
Warning: the following project(s) have [[constraint]] stanzas in Gopkg.toml:
                                                                                  
  ✗  github.com/docker/distribution            
  ✗  github.com/opencontainers/go-digest                 
  ✗  github.com/spf13/pflag                                                        
                                                
However, these projects are not direct dependencies of the current project:
they are not imported in any .go files, nor are they in the 'required' list in        
Gopkg.toml. Dep only applies [[constraint]] rules to direct dependencies, so         
these rules will have no effect.                                                               
                                                                           
Either import/require packages from these projects so that they become direct
dependencies, or convert each [[constraint]] to an [[override]] to enforce rules
on these projects, if they happen to be transitive dependencies,        
                                     
Root project is "k8s.io/ingress-gce"
 23 transitively valid internal packages
 41 external packages imported from 8 projects
(0)   ✓ select (root)
(1)     ? attempt github.com/golang/glog with 1 pkgs; at least 1 versions to try
(1)         try github.com/golang/glog@23def4e6c14b4da8ac2ed8007337bc5eb5007998
(1)     ✓ select github.com/golang/glog@23def4e6c14b4da8ac2ed8007337bc5eb5007998 w/1 pkgs
(2)     ? attempt github.com/gorilla/websocket with 1 pkgs; at least 1 versions to try
(2)         try github.com/gorilla/websocket@v1.2.0
(2)     ✓ select github.com/gorilla/websocket@v1.2.0 w/1 pkgs
(3)     ? attempt github.com/prometheus/client_golang with 1 pkgs; at least 1 versions to try
(3)         try github.com/prometheus/client_golang@v0.8.0
(3)     ✓ select github.com/prometheus/client_golang@v0.8.0 w/2 pkgs
(4)     ? attempt github.com/beorn7/perks with 1 pkgs; at least 1 versions to try
(4)         try github.com/beorn7/perks@master
(4)     ✓ select github.com/beorn7/perks@master w/1 pkgs
(5)     ? attempt github.com/prometheus/client_model with 1 pkgs; at least 1 versions to try
(5)         try github.com/prometheus/client_model@master
(5)     ✓ select github.com/prometheus/client_model@master w/1 pkgs
(6)     ? attempt github.com/golang/protobuf with 1 pkgs; at least 1 versions to try
(6)         try github.com/golang/protobuf@master
(6)     ✓ select github.com/golang/protobuf@master w/1 pkgs
(7)     ? attempt github.com/prometheus/common with 2 pkgs; at least 1 versions to try
(7)         try github.com/prometheus/common@master
(7)     ✓ select github.com/prometheus/common@master w/3 pkgs
(8)     ? attempt github.com/matttproud/golang_protobuf_extensions with 1 pkgs; at least 1 versions to try
(8)         try github.com/matttproud/golang_protobuf_extensions@v1.0.0
(8)     ✓ select github.com/matttproud/golang_protobuf_extensions@v1.0.0 w/1 pkgs
(9)     ? attempt k8s.io/kubernetes with 6 pkgs; at least 1 versions to try
(9)         try k8s.io/kubernetes@7652c252d4ce2aea1563853bef0438769c5781fd
(9)     ✓ select k8s.io/kubernetes@7652c252d4ce2aea1563853bef0438769c5781fd w/41 pkgs
(10)  ? revisit github.com/prometheus/client_golang to add 1 pkgs
(10)    ✓ include 1 more pkgs from github.com/prometheus/client_golang@v0.8.0
(10)  ? attempt cloud.google.com/go with 1 pkgs; at least 1 versions to try
(11)      try cloud.google.com/go@v0.17.0
(11)  ✓ select cloud.google.com/go@v0.17.0 w/1 pkgs
(11)  ? attempt github.com/davecgh/go-spew with 1 pkgs; at least 1 versions to try
(12)      try github.com/davecgh/go-spew@v1.1.0
(12)  ✓ select github.com/davecgh/go-spew@v1.1.0 w/1 pkgs
(12)  ? attempt github.com/dgrijalva/jwt-go with 1 pkgs; at least 1 versions to try
(13)      try github.com/dgrijalva/jwt-go@v3.1.0
(13)  ✓ select github.com/dgrijalva/jwt-go@v3.1.0 w/1 pkgs
(13)  ? attempt github.com/docker/distribution with 1 pkgs; at least 1 versions to try
(14)      try github.com/docker/distribution@edc3ab29cdff8694dd6feb85cfeb4b5f1b38ed9c
(14)  ✓ select github.com/docker/distribution@edc3ab29cdff8694dd6feb85cfeb4b5f1b38ed9c w/2 pkgs
(14)  ? attempt golang.org/x/oauth2 with 2 pkgs; at least 1 versions to try
(15)      try golang.org/x/oauth2@master
(15)  ✓ select golang.org/x/oauth2@master w/5 pkgs
(15)  ? attempt golang.org/x/net with 2 pkgs; at least 1 versions to try
(16)      try golang.org/x/net@master
(16)  ✓ select golang.org/x/net@master w/2 pkgs
(16)  ? attempt github.com/prometheus/procfs with 1 pkgs; at least 1 versions to try
(17)      try github.com/prometheus/procfs@master
(17)  ✓ select github.com/prometheus/procfs@master w/2 pkgs
(17)  ? attempt github.com/golang/groupcache with 1 pkgs; at least 1 versions to try
(18)      try github.com/golang/groupcache@master
(18)  ✓ select github.com/golang/groupcache@master w/1 pkgs
(18)  ? attempt google.golang.org/api with 2 pkgs; at least 1 versions to try
(19)      try google.golang.org/api@373a4c220f5c90e5b7ff7101779c5be385d171be
(19)  ✓ select google.golang.org/api@373a4c220f5c90e5b7ff7101779c5be385d171be w/5 pkgs
(20)    ← no more versions of k8s.io/apiextensions-apiserver to try; begin backtrack
(19)  ← backtrack: no more versions of google.golang.org/api to try
(18)  ← backtrack: no more versions of github.com/golang/groupcache to try
(17)  ← backtrack: no more versions of github.com/prometheus/procfs to try
(16)  ← backtrack: no more versions of golang.org/x/net to try
(15)  ← backtrack: no more versions of golang.org/x/oauth2 to try
(14)  ← backtrack: no more versions of github.com/docker/distribution to try
(13)  ← backtrack: no more versions of github.com/dgrijalva/jwt-go to try
(12)  ← backtrack: no more versions of github.com/davecgh/go-spew to try
(11)  ← backtrack: no more versions of cloud.google.com/go to try
(10)  ← backtrack: popped 1 pkgs from github.com/prometheus/client_golang
(9)     ← backtrack: no more versions of k8s.io/kubernetes to try
(8)     ← backtrack: no more versions of github.com/matttproud/golang_protobuf_extensions to try
(7)     ← backtrack: no more versions of github.com/prometheus/common to try
(6)     ← backtrack: no more versions of github.com/golang/protobuf to try
(5)     ← backtrack: no more versions of github.com/prometheus/client_model to try
(4)     ← backtrack: no more versions of github.com/beorn7/perks to try
(3)     ← backtrack: no more versions of github.com/prometheus/client_golang to try
(2)     ← backtrack: no more versions of github.com/gorilla/websocket to try
(1)     ← backtrack: no more versions of github.com/golang/glog to try
  ✗ solving failed

Solver wall times by segment:
     b-source-exists: 8.563369086s
         b-list-pkgs: 4.526788677s
              b-gmal: 1.783593559s
  b-deduce-proj-root: 1.168543572s
         select-atom: 140.675344ms
            unselect:  132.55547ms
             satisfy: 120.609012ms
         select-root:   2.532885ms
            new-atom:   1.225076ms
           backtrack:    251.339µs
               other:     60.042µs
            add-atom:      3.987µs

  TOTAL: 16.440208049s

Solving failure: exit status 128

/assign

[MrHohn]

I was suspecting #148, which made a raw patch in vendor. But turned out even after reverted that dep ensure doesn't work. It might be something else.

[MrHohn]

Sorry, turned out to be some permission issues in my dep cache ($GOPATH/pkg/dep/sources/) caused by couple improper operations.