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Ask questionscmd/go: "found, but does not contain package" error refers to replaced version instead of its replacement

<!-- Please answer these questions before submitting your issue. Thanks! -->

What version of Go are you using (go version)?

<pre> $ go version go version go1.13 darwin/amd64 </pre>

Does this issue reproduce with the latest release?

Yes

What operating system and processor architecture are you using (go env)?

<details><summary><code>go env</code> Output</summary><br><pre> $ go env GO111MODULE="" GOARCH="amd64" GOBIN="" GOCACHE="/Users/rajagast/Library/Caches/go-build" GOENV="/Users/rajagast/Library/Application Support/go/env" GOEXE="" GOFLAGS="" GOHOSTARCH="amd64" GOHOSTOS="darwin" GONOPROXY="none" GONOSUMDB="git.company.com" GOOS="darwin" GOPATH="/Users/rajagast/go" GOPRIVATE="git.company.com" GOPROXY="https://athens.company.com" GOROOT="/usr/local/Cellar/go/1.13/libexec" GOSUMDB="sum.golang.org" GOTMPDIR="" GOTOOLDIR="/usr/local/Cellar/go/1.13/libexec/pkg/tool/darwin_amd64" GCCGO="gccgo" AR="ar" CC="clang" CXX="clang++" CGO_ENABLED="1" GOMOD="/Users/rajagast/go/src/git.company.com/CPSG/ccp-operator/go.mod" CGO_CFLAGS="-g -O2" CGO_CPPFLAGS="" CGO_CXXFLAGS="-g -O2" CGO_FFLAGS="-g -O2" CGO_LDFLAGS="-g -O2" PKG_CONFIG="pkg-config" GOGCCFLAGS="-fPIC -m64 -pthread -fno-caret-diagnostics -Qunused-arguments -fmessage-length=0 -fdebug-prefix-map=/var/folders/d0/18x8fk8571v3t2p12n8r340h0000gn/T/go-build223406614=/tmp/go-build -gno-record-gcc-switches -fno-common" </pre></details>

What did you do?

I have k8s.io/code-generator as a tools dependency i.e. I have a top-level tools.go file with these contents:

// +build tools

package tools

import (
	_ "k8s.io/code-generator/cmd/client-gen"
	_ "k8s.io/code-generator/cmd/conversion-gen"
	_ "k8s.io/code-generator/cmd/deepcopy-gen"
	_ "k8s.io/code-generator/cmd/defaulter-gen"
	_ "k8s.io/code-generator/cmd/informer-gen"
	_ "k8s.io/code-generator/cmd/lister-gen"
	_ "k8s.io/code-generator/cmd/openapi-gen"
)

I also have one private dependency, so according to go1.13 I'm setting appropriate env variables.

$ go env -w GOPRIVATE=git.company.com GOPROXY=https://athens.company.com GONOPROXY=none

When I do go mod tidy, I get the following failure which is very vague:

go: finding k8s.io/code-generator latest
git.company.com/CPSG/ccp-operator imports
	k8s.io/code-generator/cmd/openapi-gen: module k8s.io/code-generator/cmd/openapi-gen: reading https://athens.company.com/k8s.io/code-generator/cmd/openapi-gen/@v/list: 500 Internal Server Error
git.company.com/CPSG/ccp-operator/pkg/controller/cluster/worker imports
	github.com/openshift/kubernetes-drain tested by
	github.com/openshift/kubernetes-drain.test imports
	github.com/go-log/log/capture: module github.com/go-log/log/capture: reading https://athens.company.com/github.com/go-log/log/capture/@v/list: 500 Internal Server Error

The interesting thing is when I turn off GOPROXY with go env -w "GOPROXY=", it shows a different error:

go: finding k8s.io/code-generator latest
git.company.com/CPSG/ccp-operator imports
	k8s.io/code-generator/cmd/openapi-gen: module k8s.io/code-generator@latest (v0.0.0-20190831074504-732c9ca86353) found, but does not contain package k8s.io/code-generator/cmd/openapi-gen
git.company.com/CPSG/ccp-operator/pkg/controller/cluster/worker imports
	github.com/openshift/kubernetes-drain tested by
	github.com/openshift/kubernetes-drain.test imports
	github.com/go-log/log/capture: module github.com/go-log/log@latest (v0.1.0) found, but does not contain package github.com/go-log/log/capture

The error k8s.io/code-generator/cmd/openapi-gen: module k8s.io/code-generator@latest (v0.0.0-20190831074504-732c9ca86353) found, but does not contain package k8s.io/code-generator/cmd/openapi-gen is strange because latest code in that repo does contain that package.

Fwiw, this used to work perfectly fine with go1.12.9 yesterday.

This is my go.mod:

module git.company.com/CPSG/ccp-operator

go 1.12

require (
	github.com/docker/distribution v2.7.1+incompatible // indirect
	github.com/docker/spdystream v0.0.0-20181023171402-6480d4af844c // indirect
	github.com/elazarl/goproxy v0.0.0-20181111060418-2ce16c963a8a // indirect
	github.com/evanphx/json-patch v4.2.0+incompatible // indirect
	github.com/ghodss/yaml v1.0.0 // indirect
	github.com/go-log/log v0.1.0 // indirect
	github.com/go-logr/logr v0.1.0
	github.com/go-logr/zapr v0.1.0
	github.com/gogo/protobuf v1.2.2-0.20190723190241-65acae22fc9d // indirect
	github.com/golang/glog v0.0.0-20160126235308-23def4e6c14b
	github.com/golang/groupcache v0.0.0-20180924190550-6f2cf27854a4 // indirect
	github.com/google/btree v1.0.0 // indirect
	github.com/google/uuid v1.1.1
	github.com/googleapis/gnostic v0.2.0 // indirect
	github.com/gorilla/mux v1.7.1
	github.com/gregjones/httpcache v0.0.0-20180305231024-9cad4c3443a7 // indirect
	github.com/hashicorp/golang-lru v0.5.1 // indirect
	github.com/imdario/mergo v0.3.6 // indirect
	github.com/json-iterator/go v1.1.7 // indirect
	github.com/mattbaird/jsonpatch v0.0.0-20171005235357-81af80346b1a // indirect
	github.com/modern-go/reflect2 v1.0.1 // indirect
	github.com/onsi/ginkgo v1.8.0
	github.com/onsi/gomega v1.5.0
	github.com/opencontainers/go-digest v1.0.0-rc1 // indirect
	github.com/openshift/cluster-network-operator v0.0.0-20190613202004-28fc1e342cde // indirect
	github.com/openshift/kubernetes-drain v0.0.0-20180831174519-c2e51be1758e
	github.com/operator-framework/operator-sdk v0.4.1
	github.com/pborman/uuid v1.2.0
	github.com/peterbourgon/diskv v2.0.1+incompatible // indirect
	github.com/pkg/errors v0.8.1
	github.com/prometheus/client_golang v0.9.2 // indirect
	github.com/prometheus/client_model v0.0.0-20190129233127-fd36f4220a90 // indirect
	github.com/prometheus/common v0.2.0 // indirect
	github.com/prometheus/procfs v0.0.0-20190403104016-ea9eea638872 // indirect
	github.com/renstrom/dedent v0.0.0-00010101000000-000000000000 // indirect
	github.com/rogpeppe/go-internal v1.3.0 // indirect
	github.com/spf13/pflag v1.0.3 // indirect
	github.com/vmware/govmomi v0.19.0
	go.uber.org/atomic v1.3.2 // indirect
	go.uber.org/multierr v1.1.0 // indirect
	go.uber.org/zap v1.9.1
	golang.org/x/crypto v0.0.0-20190611184440-5c40567a22f8 // indirect
	golang.org/x/net v0.0.0-20190812203447-cdfb69ac37fc
	golang.org/x/oauth2 v0.0.0-20190402181905-9f3314589c9a // indirect
	golang.org/x/sys v0.0.0-20190616124812-15dcb6c0061f // indirect
	golang.org/x/text v0.3.2 // indirect
	golang.org/x/time v0.0.0-20180412165947-fbb02b2291d2 // indirect
	golang.org/x/tools v0.0.0-20190621195816-6e04913cbbac // indirect
	google.golang.org/appengine v1.5.0 // indirect
	gopkg.in/inf.v0 v0.9.1 // indirect
	gopkg.in/yaml.v2 v2.2.2 // indirect
	k8s.io/api v0.0.0-20190704094930-781da4e7b28a
	k8s.io/apiextensions-apiserver v0.0.0-20190704104408-4c62af35d786
	k8s.io/apimachinery v0.0.0-20190704094625-facf06a8f4b8
	k8s.io/apiserver v0.0.0-20190704101201-5341ddeccec6 // indirect
	k8s.io/client-go v10.0.0+incompatible
	k8s.io/cluster-bootstrap v0.0.0-20190704110328-86aca54c9e62
	k8s.io/code-generator v0.0.0-20190704094322-1ed9df051d9b
	k8s.io/gengo v0.0.0-20190826232639-a874a240740c // indirect
	k8s.io/klog v0.4.0 // indirect
	k8s.io/kube-openapi v0.0.0-20190816220812-743ec37842bf // indirect
	k8s.io/kube-proxy v0.0.0-20190704105642-5b7f4f839816 // indirect
	k8s.io/kubelet v0.0.0-20190704105832-d6717358a5ca // indirect
	k8s.io/kubernetes v1.13.5
	k8s.io/utils v0.0.0-20190607212802-c55fbcfc754a // indirect
	sigs.k8s.io/controller-runtime v0.1.9
	sigs.k8s.io/testing_frameworks v0.1.1 // indirect
	git.company.com/CPSG/ccp-net-tinker v0.0.2-0.20190614085909-34571ec5f0c5
)

replace (
	github.com/renstrom/dedent => github.com/lithammer/dedent v1.1.0
	k8s.io/code-generator => k8s.io/code-generator v0.0.0-20190704094322-1ed9df051d9b
)

What did you expect to see?

go mod tidy resolve dependencies correctly without error, as it did with go1.12.9.

What did you see instead?

Two issues:

  1. go mod tidy says packages do not exist when they are indeed present.
  2. When GOPROXY is set, it errors out without any meaningful message.
golang/go

Answer questions heschi

It's clearly true that kubernetes-drain depends on a package in log that doesn't exist at the latest tagged version, v0.1.0. So it seems reasonable that 1.13 is unhappy; perhaps it was a bug in 1.12 that it didn't notice. Generally speaking, if go mod tidy notices that there is a package missing, it will try to upgrade to the latest version of the module to see if it exists, but in this case there is no tagged version that contains the capture package. I'd suggest forcing an upgrade by replacing v0.1.0 with master in your go.mod to tell the Go command to use the latest commit rather than the latest tagged version.

@bcmills to confirm that this is all WAI.

useful!

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answerer
Heschi Kreinick heschi

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