Februari 20, 2016

Multiple Go versions in Linux

Currently, there are trends on software development that tend to release their SDK on regular basis. Rust for example, also Go with 6 month release cycle. This predictable release is good and I personally like it since I can predict on features availability and use them for my software development project. The downside of this approach is there are many versions availablle that install them using OS package manager is proved to be pain in the ass.

Some of developers then create tools to manage multiple versions of the SDK, see GVM (Go Version Manager) and multirust (for Rust) for example. They are good of course but I probably choose not to use them since probably someday they won't be developed (see the latest commit if you want). My approach is simpler but only for Linux with Bash. If you use Windows, you may adopt my approach using SET to setup env variables and put them in batch file (.BAT). Explanation follows.

Directory Setup

I put all of my Go related software inside /opt/software/go-dev-tools. Here's the structure:


Directory Contents

I put Go SDK inside go, all Go related tools inside go-tools, liteide for LiteIDE, and tmp for temporary pkg dir whenever I want to compile and put Go tools inside go-tools.

Inside go-version (go1.2.2, go1.3.3, etc), I extract all of downloaded SDK from Go download page.

Environment Variables

In my $HOME/env dir, I created go directory to manage environment variables for my Go version. They usually have the same env variables, except for version pre 1.5, 1.5 (for vendor experimentation) and  1.6.

Pre 1.5 and > 1.6

$ cat ~/env/go/go1.2.2
GODEVTOOLS_HOME=/opt/software/go-dev-tools

GO_HOME=$GODEVTOOLS_HOME/go/go1.2.2
LITEIDE_HOME=$GODEVTOOLS_HOME/liteide
GOTOOLS=$GODEVTOOLS_HOME/go-tools

export GOROOT=$GO_HOME
export GOOS=linux
export GOARCH=amd64
export GOHOSTOS=linux
export GOHOSTARCH=amd64
export GOBIN=$GOROOT/bin

export PATH=$PATH:$GO_HOME/bin:$LITEIDE_HOME/bin:$GOTOOLS

alias go=colorgo$

1.5

$ cat ~/env/go/go1.5.3
GODEVTOOLS_HOME=/opt/software/go-dev-tools

GO_HOME=$GODEVTOOLS_HOME/go/go1.5.3
LITEIDE_HOME=$GODEVTOOLS_HOME/liteide
GOTOOLS=$GODEVTOOLS_HOME/go-tools

export GOROOT=$GO_HOME
export GOOS=linux
export GOARCH=amd64
export GOHOSTOS=linux
export GOHOSTARCH=amd64
export GOBIN=$GOROOT/bin

export PATH=$PATH:$GO_HOME/bin:$LITEIDE_HOME/bin:$GOTOOLS

alias go=colorgo

export GO15VENDOREXPERIMENT=1
$

Usage 
Open new shell - terminal, and source environment variables:

$ source env/go/go1.2.2
11:25:22-bpdp@archer:~$ go version
go version go1.2.2 linux/amd64
11:25:25-bpdp@archer:~$

Open another new shell - terminal, and source env vars:

$ source env/go/go1.6.0
11:25:59-bpdp@archer:~$ go version
go version go1.6 linux/amd64
11:26:01-bpdp@archer:~$

and so on.

Go Tools

When you see something interesting for your Go project, just go to /opt/software/go-dev-tools/tmp and the Go get them and copy the files inside /opt/software/go-dev-tools/go-tools:

$ cd /opt/software/go-dev-tools/tmp/
$ export GOPATH=`pwd`
$ go get github.com/smartystreets/goconvey
$ mv ../go/go1.6/bin/goconvey ../go-tools/
$ which goconvey
/opt/software/go-dev-tools/go-tools/goconvey
$

I don't know whether my approach is the best, but it proves to be comfortable for me. As always, YMMV. Happy hacking!












0 comments:

Poskan Komentar