Run Golang script from shell script

Question

I'm trying to run my golang program whenever I log into OSX. I'm trying the following script with Automator:

#!/bin/sh
export GOPATH=/Volumes/DTSE9/worker
go run /Volumes/worker/worker.go

Whenever I run this with Automator, it tells me go: command not found

Mayworm

So go isn't in the PATH. You either add it to the PATH, or us a full path. – Rhododendron

@Rhododendron Do you mean add export GOROOT=/usr/local/go/bin/go above the first export? Just tried that and it doesn't work. – Mayworm

No, don't set GOROOT (and that's not a valid value for GOROOT anyway). If /usr/local/go/bin isn't in your path, you need to add it to your PATH, or use /usr/local/go/bin/go run – Rhododendron

But why not just compile the program and run the executable? It will run faster and won't depend on the state of GOPATH. – Rhododendron

Answer 1

Create a file like say file.go and it's content should look like:

///path-to/bin/go run $0 $@; exit $?

package main

func main() {
    println("Hello World!")
}

Then run chmod +x file.go and then you can execute it as ./file.go p1 p2.

Edit: This works on Ubuntu. I did not saw that OSX was in question.

This is another version of the first line which does not require the path to the go command (tested on zsh):

///$(which go) run $0 $@; exit $?

Hilmahilt

lol, really taking the term "go script" literally, but it is a neat hack ;). It should run fine on macOS too. – Rhododendron

Just tried that and got: go: unknown subcommand "./main.go" Run 'go help' for usage. – Mayworm

You do not need to call go command anymore - just $ ./main.go. And I'm using it on Ubuntu; though I'm not familiar with OSX, but since it's a POSIX compatible OS (& as I understand, has bash), this should work on OSX too. – Hilmahilt

@KavehShahbazian yeah, that's what I did. $ ./main.go and I got the above error message. – Mayworm

Then it's something about OSX that I'm not aware of (but a guess is at the first line instead of /path-to/go run you just have /path-to/go). – Hilmahilt

go build works, but how do I specify the full path when executing an executable? I'm trying .//Volumes/DTSE9/worker/main – Mayworm

@KavehShahbazian Oh I was missing the run. Ok that worked, but how do I specify the absolute path to do the ./? – Mayworm

This is the full path to your file. At the first line you should put full path to go binary itself. – Hilmahilt

@KavehShahbazian No, I mean I'm trying to run a shell script from OSX Automator and the script is on my flash drive, so I'm trying to specify the absolute path for the shell script to execute the go executable. – Mayworm

Let us continue this discussion in chat. – Hilmahilt