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x/vgo: go.mod changes if run vgo test ./... after first vgo build ./... #25806

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albenik opened this issue Jun 9, 2018 · 3 comments
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x/vgo: go.mod changes if run vgo test ./... after first vgo build ./... #25806

albenik opened this issue Jun 9, 2018 · 3 comments
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@albenik
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albenik commented Jun 9, 2018 •
edited

Please answer these questions before submitting your issue. Thanks!

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

go version go1.10.3 darwin/amd64

Does this issue reproduce with the latest release?

Yes

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

GOARCH="amd64"
GOBIN=""
GOCACHE="/Users/valbaev/Library/Caches/go-build"
GOEXE=""
GOHOSTARCH="amd64"
GOHOSTOS="darwin"
GOOS="darwin"
GOPATH="/Users/valbaev/Go"
GORACE=""
GOROOT="/usr/local/Cellar/go/1.10.3/libexec"
GOTMPDIR=""
GOTOOLDIR="/usr/local/Cellar/go/1.10.3/libexec/pkg/tool/darwin_amd64"
GCCGO="gccgo"
CC="clang"
CXX="clang++"
CGO_ENABLED="1"
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/4r69fc5d0wg0nh49b69gkj_m0000gn/T/go-build666950043=/tmp/go-build -gno-record-gcc-switches -fno-common"

What did you do?

  1. Clone example project github.com/albenik/vgo-test
  2. vgo build ./...
  3. cat go.mod
  4. vgo test ./...
  5. cat go.mod
  6. vgo build ./...
  7. cat go.mod

What did you expect to see?

module github.com/albenik/vgo-test

require (
	github.com/stretchr/testify v1.2.2
	go.uber.org/zap v1.8.0
)

At 3,5,7 steps

What did you see instead?

3 step

module github.com/albenik/vgo-test

require go.uber.org/zap v1.8.0

5, 7 steps

module github.com/albenik/vgo-test

require (
	github.com/stretchr/testify v1.2.2
	go.uber.org/zap v1.8.0
)
@gopherbot gopherbot added this to the vgo milestone Jun 9, 2018
@albenik
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albenik commented Jun 9, 2018

At least inconsistent go.mod after identical vgo build at 2 & 6 steps very confusing

@myitcv
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myitcv commented Jun 9, 2018

@albenik vgo build does not look at *_test.go files, and hence the go.mod that is automatically created does not see any of the imports in pkg_test.go. vgo test does see those imports, and so the go.mod file is updated. The final vgo build doesn't have anything new to do, hence go.mod is left untouched.

I'm going to close this because everything is working as intended.

@myitcv myitcv closed this as completed Jun 9, 2018
@oiooj
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oiooj commented Jun 10, 2018

Duplicate of #25672.

@golang golang locked and limited conversation to collaborators Jun 10, 2019
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@albenik @oiooj @myitcv @gopherbot