Install: Building from Source Docs Broken

[c-kruse]

Describe the bug

The Building from Source instructions do not work as-is.

• go get -d -u github.com/ory/keto fails. It appears to be related to github.com/ory/x/viperx no longer existing in the latest version of https://github.com/ory/x. This feels like it may be an oversight in the versioning scheme of https://github.com/ory/x, but its README does warn of this.
• After circumventing this (by removing the -u flag) github.com/ory/keto is still absent from $GOPATH/src. As of go 1.16 module-aware mode is the default. go get -d -u github.com/ory/keto no longer downloads the source to $GOPATH/src unless you overwrite GO111MODULE to auto or off.

Reproducing the bug

Steps to reproduce the behavior:

Running through instructions here: https://github.com/ory/keto/blob/0ac4fe1667ee1edd133fe3f117e204e3144f6c78/docs/docs/install.md#building-from-source

Server logs

~ docker run -it golang:1.16.3-buster
root@bb7f6028a45a:/go# go get -d -u github.com/ory/keto
go: downloading github.com/ory/keto v0.5.2
go: downloading github.com/ory/x v0.0.109
...
github.com/ory/keto imports
	github.com/ory/keto/cmd imports
	github.com/ory/x/viperx: cannot find module providing package github.com/ory/x/viperx
go: downloading github.com/segmentio/analytics-go v1.2.0

root@bb7f6028a45a:/go# go get -d github.com/ory/keto
root@bb7f6028a45a:/go# ls src/
root@bb7f6028a45a:/go# GO111MODULE=off go get -d github.com/ory/keto
cannot find package "github.com/cenkalti/backoff/v3" in any of:
	/usr/local/go/src/github.com/cenkalti/backoff/v3 (from $GOROOT)
	/go/src/github.com/cenkalti/backoff/v3 (from $GOPATH)
root@bb7f6028a45a:/go# ls $GOPATH/src/github.com/ory/
analytics-go  dockertest  graceful  herodot  jsonschema  keto  x
root@bb7f6028a45a:/go/src/github.com/ory/keto# cd $GOPATH/src/github.com/ory/keto/
root@bb7f6028a45a:/go/src/github.com/ory/keto# git rev-parse HEAD
0ac4fe1667ee1edd133fe3f117e204e3144f6c78

Server configuration

Expected behavior

Install documentation would run for the default go installation.

Environment

• Version: N/A - latest
• Environment: MacOS 10.15.7 and Docker golang:1.16.3-buster
• Go: go1.16.3 darwin/amd64 and go1.16.3 linux/amd64

Additional context

My suggestion: update the docs to ask folks to just clone the repo and run make install. Using this approach I had no problems.

[zepatrik]

Thanks, adapted the steps 👍