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cmd/go2go: fails to build the testdata #39617

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OneOfOne opened this issue Jun 16, 2020 · 2 comments
Closed

cmd/go2go: fails to build the testdata #39617

OneOfOne opened this issue Jun 16, 2020 · 2 comments
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FrozenDueToAge NeedsInvestigation Someone must examine and confirm this is a valid issue and not a duplicate of an existing one.
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@OneOfOne
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What version of Go are you using (go version)?

$ go version
go version devel +ad307489d4 2020-06-16 05:49:35 +0000 linux/amd64

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

go env Output
$ go env
GO111MODULE=""
GOARCH="amd64"
GOBIN="/home/oneofone/code/go/bin"
GOCACHE="/home/oneofone/.cache/go-build"
GOENV="/home/oneofone/.config/go/env"
GOEXE=""
GOFLAGS="-gcflags=-c=16"
GOHOSTARCH="amd64"
GOHOSTOS="linux"
GOINSECURE=""
GOMODCACHE="/usr/src/go2/src/cmd/go2go/testdata/go2path/pkg/mod"
GONOPROXY=""
GONOSUMDB=""
GOOS="linux"
GOPATH="/usr/src/go2/src/cmd/go2go/testdata/go2path"
GOPRIVATE=""
GOPROXY="direct"
GOROOT="/usr/src/go2"
GOSUMDB="off"
GOTMPDIR=""
GOTOOLDIR="/usr/src/go2/pkg/tool/linux_amd64"
GCCGO="gccgo"
AR="ar"
CC="gcc"
CXX="g++"
CGO_ENABLED="1"
GOMOD="/usr/src/go2/src/cmd/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 -fmessage-length=0 -fdebug-prefix-map=/tmp/go-build427285826=/tmp/go-build -gno-record-gcc-switches"

What did you do?

$ export GOPATH=/usr/src/go2/src/cmd/go2go/testdata/go2path
$ cd $GOPATH/src/slices
$ go2 tool go2go test
type checking failed for slices
slices.go2:10:2: could not import alg (type checking failed for alg
/tmp/go2go918845650/src/alg/alg.go2:8:8: could not import constraints (open /usr/src/go2/src/cmd/vendor/constraints: no such file or directory)
/tmp/go2go918845650/src/alg/alg.go2:12:5: cannot compare a < b (operator < not defined for T)
/tmp/go2go918845650/src/alg/alg.go2:20:5: cannot compare a < b (operator < not defined for T)
)

and without explicit GOPATH:

type checking failed for slices
slices.go2:10:2: could not import alg (cannot find package "alg" in any of:
/usr/src/go2/src/alg (from $GOROOT)
/home/oneofone/go/src/alg (from $GOPATH))
slices.go2:11:2: could not import constraints (cannot find package "constraints" in any of:
/usr/src/go2/src/constraints (from $GOROOT)
/home/oneofone/go/src/constraints (from $GOPATH))
slices_test.go2:46:18: cannot convert 1 (untyped int constant) to Elem
slices_test.go2:46:32: cannot convert 1 (untyped int constant) to Elem
@griesemer griesemer added the NeedsInvestigation Someone must examine and confirm this is a valid issue and not a duplicate of an existing one. label Jun 17, 2020
@griesemer griesemer added this to the Unreleased milestone Jun 17, 2020
@ianlancetaylor
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You need to set GO2PATH, not GOPATH, to find .go2 packages. Closing, but please comment if it still doesn't work.

@OneOfOne OneOfOne mentioned this issue Jun 17, 2020
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@gopherbot
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Change https://golang.org/cl/238498 mentions this issue: README.go2go: add a note about GO2PATH

gopherbot pushed a commit that referenced this issue Jun 17, 2020
@OneOfOne @ianlancetaylor
README.go2go: add a note about GO2PATH
3f40f78 
Adds a little note about `GO2PATH` and that it is required for the `go2go` tool.

Updates #39617

Change-Id: I9e3cea16a7d7539555180dc065957d6a56f390b9
GitHub-Last-Rev: 2aa6815
GitHub-Pull-Request: #39657
Reviewed-on: https://go-review.googlesource.com/c/go/+/238498
Reviewed-by: Ian Lance Taylor <iant@golang.org>
@golang golang locked and limited conversation to collaborators Jun 17, 2021
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