"dep ensure -add" does not work

[crimsonfaith91]

I may miss out something simple, but I couldn't import this package via dep ensure -add github.com/kubernetes-csi/external-snapshotter command.

Following is the output:

Fetching sources...

Solving failure: No versions of github.com/kubernetes-csi/external-snapshotter met constraints:
	v1.0.1: Could not introduce github.com/kubernetes-csi/external-snapshotter@v1.0.1, as its subpackage github.com/kubernetes-csi/external-snapshotter does not contain usable Go code (*build.NoGoError).. (Package is required by (root).)
	v0.4.1: Could not introduce github.com/kubernetes-csi/external-snapshotter@v0.4.1, as its subpackage github.com/kubernetes-csi/external-snapshotter does not contain usable Go code (*build.NoGoError).. (Package is required by (root).)
	v0.4.0: Could not introduce github.com/kubernetes-csi/external-snapshotter@v0.4.0, as its subpackage github.com/kubernetes-csi/external-snapshotter does not contain usable Go code (*build.NoGoError).. (Package is required by (root).)
	v1.0.1-rc1: Could not introduce github.com/kubernetes-csi/external-snapshotter@v1.0.1-rc1, as its subpackage github.com/kubernetes-csi/external-snapshotter does not contain usable Go code (*build.NoGoError).. (Package is required by (root).)
	v1.0.0-rc4: Could not introduce github.com/kubernetes-csi/external-snapshotter@v1.0.0-rc4, as its subpackage github.com/kubernetes-csi/external-snapshotter does not contain usable Go code (*build.NoGoError).. (Package is required by (root).)
	v1.0.0-rc3: Could not introduce github.com/kubernetes-csi/external-snapshotter@v1.0.0-rc3, as its subpackage github.com/kubernetes-csi/external-snapshotter does not contain usable Go code (*build.NoGoError).. (Package is required by (root).)
	v1.0.0-rc2: Could not introduce github.com/kubernetes-csi/external-snapshotter@v1.0.0-rc2, as its subpackage github.com/kubernetes-csi/external-snapshotter does not contain usable Go code (*build.NoGoError).. (Package is required by (root).)
	v0.5.0-alpha.0: Could not introduce github.com/kubernetes-csi/external-snapshotter@v0.5.0-alpha.0, as its subpackage github.com/kubernetes-csi/external-snapshotter does not contain usable Go code (*build.NoGoError).. (Package is required by (root).)
	v0.4.0-rc.1: Could not introduce github.com/kubernetes-csi/external-snapshotter@v0.4.0-rc.1, as its subpackage github.com/kubernetes-csi/external-snapshotter does not contain usable Go code (*build.NoGoError).. (Package is required by (root).)
	master: Could not introduce github.com/kubernetes-csi/external-snapshotter@master, as its subpackage github.com/kubernetes-csi/external-snapshotter does not contain usable Go code (*build.NoGoError).. (Package is required by (root).)
	errorhandling: Could not introduce github.com/kubernetes-csi/external-snapshotter@errorhandling, as its subpackage github.com/kubernetes-csi/external-snapshotter does not contain usable Go code (*build.NoGoError).. (Package is required by (root).)
	k8s_1.12.0-beta.1: Could not introduce github.com/kubernetes-csi/external-snapshotter@k8s_1.12.0-beta.1, as its subpackage github.com/kubernetes-csi/external-snapshotter does not contain usable Go code (*build.NoGoError).. (Package is required by (root).)
	release-0.4: Could not introduce github.com/kubernetes-csi/external-snapshotter@release-0.4, as its subpackage github.com/kubernetes-csi/external-snapshotter does not contain usable Go code (*build.NoGoError).. (Package is required by (root).)
	release-1.0: Could not introduce github.com/kubernetes-csi/external-snapshotter@release-1.0, as its subpackage github.com/kubernetes-csi/external-snapshotter does not contain usable Go code (*build.NoGoError).. (Package is required by (root).)
	revert-72-pvclister: Could not introduce github.com/kubernetes-csi/external-snapshotter@revert-72-pvclister, as its subpackage github.com/kubernetes-csi/external-snapshotter does not contain usable Go code (*build.NoGoError).. (Package is required by (root).)
	saad-ali-patch-1: Could not introduce github.com/kubernetes-csi/external-snapshotter@saad-ali-patch-1, as its subpackage github.com/kubernetes-csi/external-snapshotter does not contain usable Go code (*build.NoGoError).. (Package is required by (root).)
	saad-ali-patch-2: Could not introduce github.com/kubernetes-csi/external-snapshotter@saad-ali-patch-2, as its subpackage github.com/kubernetes-csi/external-snapshotter does not contain usable Go code (*build.NoGoError).. (Package is required by (root).)
	test-yang: Could not introduce github.com/kubernetes-csi/external-snapshotter@test-yang, as its subpackage github.com/kubernetes-csi/external-snapshotter does not contain usable Go code (*build.NoGoError).. (Package is required by (root).)
	updateSize: Could not introduce github.com/kubernetes-csi/external-snapshotter@updateSize, as its subpackage github.com/kubernetes-csi/external-snapshotter does not contain usable Go code (*build.NoGoError).. (Package is required by (root).)

Any documentation / guidance will be much appreciated!

[xing-yang]

Where are you trying to import this into? It may have conflicting k8s dependencies with this repo?

[crimsonfaith91]

@xing-yang I tried to vendor this repository to a project generated based on this framework (not the framework itself, but a project generated from it).

Do you know what is the best way to vendor this repository inside another Golang repository?

[xing-yang]

The latest kubebuilder depends on k8s 1.13.1. External-snapshotter master branch depends on k8s 1.14.0 so it won't work. External-snapshotter v1.0.1 depends on k8s 1.13.0-beta.1. In the Gopkg.toml file of your project, can you try add the following, and then run "dep ensure"?

[[constraint]]
name = "github.com/kubernetes-csi/external-snapshotter"
version = "1.0.1"

[crimsonfaith91]

@xing-yang Thanks for the information. I added the constraint, but still encountered the same error.

Tagging @liyinan926 for follow-up.

[xing-yang]

@crimsonfaith91 I created a temporary branch on external-snapshotter called k8s_1.13.1 and updated the dependencies to k8s 1.13.1 to be consistent with kubebuilder.

[[constraint]]
name = "github.com/kubernetes-csi/external-snapshotter"
branch = "k8s_1.13.1"

Please add this to your Gopkg.toml and run "dep ensure". It works for me.

[liyinan926]

Thanks @xing-yang. Will give it a try.

[liyinan926]

The new branch works fine. Thanks again @xing-yang. This issue can be closed.

[xing-yang]

Great. Thanks.