[go-nuts] Regards setting up GOPATH and GOROOT

[Monosij Dutta-Roy]

Hello All -

I am coming to Go from a Python / Java background and would like some help
with pointers in setting up my environment.

I have set up Go in Ubuntu - I can compile fine from directory I am in.

...
I have set GOPATH to 2 dirs: 1 for the downloading of libraries
(GOPATH_LIBS) and 1 dir for my web-app and such projects (GOPATH_PROJECTS).

export GOPATH_LIBS=/var/monosij/golang


export GOPATH_PROJECTS=/space/trials/code.trials/golang
export GOPATH=$GOPATH_LIBS:$GOPATH_PROJECTS

export PATH=$PATH:$GOPATH_LIBS/bin
export PATH=$PATH:$GOPATH_PROJECTS/bin

export GOROOT=/usr/bin/go

...
Setting up a project in GOPATH_PROJECTS.
In GOPATH_PROJECTS (*=/space/trials/code.trials/golang*) I create file
Hello.go in package Main as in:

src/github.com/mdr/run1/Hello.go

Now as per doc, I should be able to compile a file in GOPATH (ie
GOPATH_PROJECT)

While I can compile Hello.go if I am in that particular dir I CANNOT
compile if I enter:
*go install github.com/mdr/run1/Hello.go
<http://github.com/mdr/run1/Hello.go>*

Should this not be picked up from GOPATH?

...
If I include src in GOPATH_PROJECTS as in:
export GOPATH_PROJECTS=/space/trials/code.trials/golang/src

and then export it to GOPATH - I get a different error when I run: *go
install github.com/mdr/run1/Hello.go <http://github.com/mdr/run1/Hello.go>*

It says
go: cannot find GOROOT directory: /usr/bin/go
***@devel:~$ echo $GOROOT
/usr/bin/go

which go also states: /usr/bin/go.

...
I appreciate your reading through the details to please let me know what I
may be doing wrong?

Also - *why* do I need the project to be in a directory *github.com
<http://github.com/>*? Can I not just have a regular directory structure?

Regardless I would like to be able to just type:
*go install github.com/mdr/run1/Hello.go
<http://github.com/mdr/run1/Hello.go>*
*which then creates Hello in *GOPATH_PROJECTS/bin.

Thank you.

Monosij

[Tamás Gulácsi]

Don't set GOROOT, and the build/install unit in go is the package, not the file. So go install my/package, where the source is in $GOPATH/SRC/my/package.