Using goinstall for your own local code
I am working towards finishing a small project in go and my thoughts have turned to how I will package it up and release the code. The latest release of go has made some changes to goinstall so that code installed by you as a user can be kept separate from the base installation of go.
The first step in using goinstall is to create a directory structure for your local source, packages and binaries. This can be done like this
% cd ~/work
% mkdir -p gocode/src gocode/pkg gocode/bin
</pre>
You can then create a GOPATH variable:
export GOPATH=~/work/gocode
</pre>
Now any go projects can be placed in the
directory and installed locally, you don’t even need to write makefiles.
For example:
% cd ~/work/gocode/src
% mkdir -p experiment/plutonium
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Now create a file
in the directory:
package plutonium
import (
"fmt"
)
func ExperimentOne(s string) string {
return fmt.Sprintf("! DANGER ! %s ! DANGER !", s)
}
</pre>
Now this code can be installed locally making it available to your other go projects:
% cd ~/work/gocode/src/experiment/plutonium
% goinstall .
% ls -l ~/work/gocode/pkg/linux_386/experiment
-rw-r--r-- 1 tim tim 9004 Jun 30 13:29 plutonium.a
</pre>
You can also create executable programs:
% cd ~/work/gocode/src
% mkdir -p experiment/bang
% cd experiment/bang
</pre>
Create a file called
:
package main
import (
"experiment/plutonium"
"log"
)
func main() {
log.Print("Running experiment", plutonium.ExperimentOne("Highly dangerous"))
log.Print("Careful now")
}
</pre>
Install and run the program:
% cd ~/work/gocode/src/experiment/bang
% goinstall .
% cd ~/work/gocode/bin
% ./bang
2011/06/30 13:38:45 Running experiment! DANGER ! Highly dangerous ! DANGER !
2011/06/30 13:38:45 Careful now
</pre>
So no Makefiles are needed! I would still create Makefiles because you will need them if you want to use gotest to run your unit tests.