Re: [go-nuts] 'go build' over writing source code.

2019-09-05 Thread Abhishek Varshney

Thanks for replying. I understood the my mistake. I executed wrong 'go mod' 
command. By mistake I used 'go mod init main.go'.
Thank you.

On Thursday, 5 September 2019 22:27:44 UTC+5:30, Ian Lance Taylor wrote:
>
> On Thu, Sep 5, 2019 at 9:47 AM > wrote: 
> > 
> > I downloaded go version 1.13 and tried to create new test project 
> outside GOPATH. Following is my observation. 
> > Should I open a bug or it is expected/known behavior? 
> > 
> > What version of Go are you using (`go version`)? 
> > $ go version 
> > go version go1.13 linux/amd64 
> > 
> > Does this issue reproduce with the latest release? 
> > yes 
> > 
> > 
> > What operating system and processor architecture are you using (`go 
> env`)? 
> > $ go env 
> > GO111MODULE="" 
> > GOARCH="amd64" 
> > GOBIN="/home/abhishek/myprog/golang/bin" 
> > GOCACHE="/home/abhishek/.cache/go-build" 
> > GOENV="/home/abhishek/.config/go/env" 
> > GOEXE="" 
> > GOFLAGS="" 
> > GOHOSTARCH="amd64" 
> > GOHOSTOS="linux" 
> > GONOPROXY="" 
> > GONOSUMDB="" 
> > GOOS="linux" 
> > GOPATH="/home/abhishek/myprog/golang" 
> > GOPRIVATE="" 
> > GOPROXY="https://proxy.golang.org,direct; 
> > GOROOT="/home/abhishek/software/go" 
> > GOSUMDB="sum.golang.org" 
> > GOTMPDIR="" 
> > GOTOOLDIR="/home/abhishek/software/go/pkg/tool/linux_amd64" 
> > GCCGO="gccgo" 
> > AR="ar" 
> > CC="gcc" 
> > CXX="g++" 
> > CGO_ENABLED="1" 
> > GOMOD="" 
> > 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-build290715438=/tmp/go-build 
> -gno-record-gcc-switches" 
> >  
> > 
> > What did you do? 
> > 1. Create folder testmux in non GOPATH folder. 
> > 2. Create main.go file inside testmux. 
> > 3. Execute go mod init 
> > 4. Execute go build 
> > 
> > code for 'main.go' is present at: 
> > https://play.golang.org/p/nzbMB2v48ty 
> > 
> > Other Observation 
> > Executing same steps inside $GOPATH/src, create binary testmux. It does 
> not over write main.go. 
> > 
> > What did you expect to see? 
> > On command 'go build' inside project folder binary with project folder 
> name should be present. 
> > 
> > What did you see instead? 
> > Command 'go build' over writes main.go command with binary (ELF) format. 
> The source code is gone now. Not recoverable. 
>
> Where exactly did you create the folder testmux?  What were the exact 
> commands that you ran?  What was the exact output? 
>
> I tried to follow your direction. 
>
> > mkdir /tmp/x 
> > cd /tmp/x 
> >  
> > go mod init 
> go: cannot determine module path for source directory /tmp/x (outside 
> GOPATH, module path must be specified) 
>
> Example usage: 
> 'go mod init example.com/m' to initialize a v0 or v1 module 
> 'go mod init example.com/m/v2' to initialize a v2 module 
>
> Run 'go help mod init' for more information. 
>
> What did you see when you ran "go mod init"? 
>
> Ian 
>

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Re: [go-nuts] 'go build' over writing source code.

2019-09-05 Thread Ian Lance Taylor
On Thu, Sep 5, 2019 at 9:47 AM  wrote:
>
> I downloaded go version 1.13 and tried to create new test project outside 
> GOPATH. Following is my observation.
> Should I open a bug or it is expected/known behavior?
>
> What version of Go are you using (`go version`)?
> $ go version
> go version go1.13 linux/amd64
>
> Does this issue reproduce with the latest release?
> yes
>
>
> What operating system and processor architecture are you using (`go env`)?
> $ go env
> GO111MODULE=""
> GOARCH="amd64"
> GOBIN="/home/abhishek/myprog/golang/bin"
> GOCACHE="/home/abhishek/.cache/go-build"
> GOENV="/home/abhishek/.config/go/env"
> GOEXE=""
> GOFLAGS=""
> GOHOSTARCH="amd64"
> GOHOSTOS="linux"
> GONOPROXY=""
> GONOSUMDB=""
> GOOS="linux"
> GOPATH="/home/abhishek/myprog/golang"
> GOPRIVATE=""
> GOPROXY="https://proxy.golang.org,direct;
> GOROOT="/home/abhishek/software/go"
> GOSUMDB="sum.golang.org"
> GOTMPDIR=""
> GOTOOLDIR="/home/abhishek/software/go/pkg/tool/linux_amd64"
> GCCGO="gccgo"
> AR="ar"
> CC="gcc"
> CXX="g++"
> CGO_ENABLED="1"
> GOMOD=""
> 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-build290715438=/tmp/go-build 
> -gno-record-gcc-switches"
> 
>
> What did you do?
> 1. Create folder testmux in non GOPATH folder.
> 2. Create main.go file inside testmux.
> 3. Execute go mod init
> 4. Execute go build
>
> code for 'main.go' is present at:
> https://play.golang.org/p/nzbMB2v48ty
>
> Other Observation
> Executing same steps inside $GOPATH/src, create binary testmux. It does not 
> over write main.go.
>
> What did you expect to see?
> On command 'go build' inside project folder binary with project folder name 
> should be present.
>
> What did you see instead?
> Command 'go build' over writes main.go command with binary (ELF) format. The 
> source code is gone now. Not recoverable.

Where exactly did you create the folder testmux?  What were the exact
commands that you ran?  What was the exact output?

I tried to follow your direction.

> mkdir /tmp/x
> cd /tmp/x
> 
> go mod init
go: cannot determine module path for source directory /tmp/x (outside
GOPATH, module path must be specified)

Example usage:
'go mod init example.com/m' to initialize a v0 or v1 module
'go mod init example.com/m/v2' to initialize a v2 module

Run 'go help mod init' for more information.

What did you see when you ran "go mod init"?

Ian

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