cmd/go: build failing due to cannot find module providing package golang.org/x/net/lex/httplex

[akashbdj]

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

$ go version
go version go1.12.5 darwin/amd64

Does this issue reproduce with the latest release?

Yes

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

go env Output

$ go env
GOARCH="amd64"
GOBIN=""
GOCACHE="/Users/akash/Library/Caches/go-build"
GOEXE=""
GOFLAGS=""
GOHOSTARCH="amd64"
GOHOSTOS="darwin"
GOOS="darwin"
GOPATH="/Users/akash/Sites/gowork"
GOPROXY=""
GORACE=""
GOROOT="/usr/local/go"
GOTMPDIR=""
GOTOOLDIR="/usr/local/go/pkg/tool/darwin_amd64"
GCCGO="gccgo"
CC="clang"
CXX="clang++"
CGO_ENABLED="1"
GOMOD="/Users/akash/Sites/new_gowork/gateway/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/fx/qxs939gj3xb7mh206kbp5m2svpzq54/T/go-build292717818=/tmp/go-build -gno-record-gcc-switches -fno-common"

What did you do?

I'm trying to port my dep based project to go modules. I moved a few basic packages to the new repo and then I ran go build -v. Build is failing with

$ go build
go: finding golang.org/x/net/lex/httplex latest
go: finding golang.org/x/net/lex latest
go: finding golang.org/x/net latest
build bitbucket.org/myntra/gateway/cmd/gateway: cannot load golang.org/x/net/lex/httplex: cannot find module providing package golang.org/x/net/lex/httplex

What did you expect to see?

A successful build

What did you see instead?

$ go build
go: finding golang.org/x/net/lex/httplex latest
go: finding golang.org/x/net/lex latest
go: finding golang.org/x/net latest
build bitbucket.org/myntra/gateway/cmd/gateway: cannot load golang.org/x/net/lex/httplex: cannot find module providing package golang.org/x/net/lex/httplex

go.mod file:

module example.org/akash/x

go 1.12

require (
	github.com/BurntSushi/toml v0.3.1 // indirect
	github.com/bkaradzic/go-lz4 v1.0.0
	github.com/go-chi/chi v4.0.2+incompatible
	github.com/golang/glog v0.0.0-20160126235308-23def4e6c14b // indirect
	github.com/google/uuid v1.1.1
	github.com/graph-gophers/graphql-go v0.0.0-20190513003547-158e7b876106
	github.com/hobbes26/go-cache v2.1.0+incompatible // indirect
	github.com/newrelic/go-agent v2.7.0+incompatible
	github.com/nytlabs/gojsonexplode v0.0.0-20160201065013-0f3fe6bb573f
	github.com/pkg/errors v0.8.1 // indirect
	github.com/sethgrid/pester v0.0.0-20190127155807-68a33a018ad0 // indirect
	github.com/sirupsen/logrus v1.4.2
	github.com/yogeshpandey/gocookie-string-reader v0.0.0-20180403114556-4f0cc6395c5e
	go.uber.org/atomic v1.4.0 // indirect
	go.uber.org/zap v1.10.0
	golang.org/x/text v0.3.2 // indirect
	gopkg.in/yaml.v2 v2.2.2 // indirect
)

[julieqiu]

The issue is that you have a transitive dependency on "golang.org/x/net/lex/httplex", which does not exists. As mentioned in the error message:

cannot load golang.org/x/net/lex/httplex: cannot find module providing package golang.org/x/net/lex/httplex

Looking at the go.mod file, this seems to be due to the dependency on github.com/yogeshpandey/gocookie-string-reader:

https://github.com/yogeshpandey/gocookie-string-reader/blob/master/parser.go#L4

For additional questions, please see one of our forums: https://golang.org/wiki/Questions, as this is expected behavior for cmd/go.

[akashbdj]

@julieqiu Thanks for pointing out!

How did you figure this out? Did you run some command to find out which dependency uses httplex?
Let me know so that it helps me figure out my future problems?

Thanks again,
Akash

[julieqiu]

I ran go get on the modules that were listed and got this error:

go get github.com/yogeshpandey/[email protected]

go: downloading github.com/yogeshpandey/gocookie-string-reader v0.0.0-20180403114556-4f0cc6395c5e
go: extracting github.com/yogeshpandey/gocookie-string-reader v0.0.0-20180403114556-4f0cc6395c5e
go: finding golang.org/x/net latest
go: downloading golang.org/x/net v0.0.0-20190522155817-f3200d17e092
go: extracting golang.org/x/net v0.0.0-20190522155817-f3200d17e092
go build golang.org/x/net/lex/httplex: no Go files in

go mod why could also be useful in this case - see https://golang.org/cmd/go/#hdr-Explain_why_packages_or_modules_are_needed and https://github.com/golang/go/wiki/Modules for additional info

[akashbdj]

Great! Thank you so much!