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[JohnRoesler]

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[NWBY]

Hey everyone, I'm using gocron in a server monitoring agent that I'm building and really love the package so far.
However, I'm struggling to use exported functions from different packages as the task passed to Do(). What I'm trying to do is declare a function in another package called core then use that function in main and pass it to the scheduler, however the error that I get is functionName() used as value

Something along the lines of:

package main

import (
  "/module/core"
  "github.com/go-co-op/gocron"
)

func main() {
	sch := gocron.NewScheduler(time.UTC)

	sch.Every(30).Seconds().Do(core.GetCpuUsage())

	sch.StartAsync()
}

Any advice, help or guidance would be greatly appreciated. Apologies in advance if this a stupid question.

[JohnRoesler]

Glad to hear you like the package! Try

1. Referencing the function without parens sch.Every(30).Seconds().Do(core.GetCpuUsage)
2. Create a var and assign the function first var myFunc = core.GetCpuUsage

[NWBY]

@JohnRoesler Thank you so much for your quick response. Option 1 worked a treat.

[JohnRoesler]

Awesome. Feel free to reach out with more questions. We're also on slack (in the readme) 😄

[Chemical-Battery]

Hello,

I'm a new programmer, and new to Go. I found your package and I think it would be great for the project I am working on. The idea is I want a Go script that will execute a external Go file from CMD I have already made on a 30 minute interval throughout the day. I wanted to build the script into an executable when I was done, so my coworkers could just click it at the start of their shifts and forget about it. I have attempted to build something out, but I can't seem to get it to kick off. I'm sure I'm missing something obvious, but I can't seem to find the solution in the docs. Would you be able to help me out?

Here is my code so far.

            package main
            
            import (
                "fmt"
                "os/exec"
                "time"
            
                "github.com/go-co-op/gocron"
            )
            
            var task = func() {
                cmd := exec.Command(`python`, `C:\Users\myusername\OneDrive\Desktop\Test_1\hello.py`)
            
                cmd.Run()
            }
            
            func main() {
                fmt.Println("Timer starting")
                s := gocron.NewScheduler(time.UTC)
            
                _, _ = s.Every(1).Seconds().Do(task)
                fmt.Println(s.TaskPresent(task))
            
            }

I'm testing it against a external Python Script here.

[Chemical-Battery]

Okay, I'll take a look at that article. I was able to pull of something like this with my first file, and have it run both a executable and a non-executable Python file. I really appreciate you taking the time to help work with me on this. I'll report back with the results.

[Chemical-Battery]

Hello,

I'm happy to report that I was able to get the script running, here is the full code.

package main

go import (
	"fmt"
	"log"
	"os/exec"
	"time"

	"github.com/go-co-op/gocron"
)

var task = func() {

	cmd := exec.Command("go", "run", `C:\Users\username\OneDrive\Desktop\Testbed\TaskSch_v1\TaskSch.go`)
	out, err := cmd.CombinedOutput()
	if err != nil {
		log.Fatalf("cmd.Run() failed with %s\n", err)
	}
	fmt.Printf("combined out:\n%s\n", string(out))

}

func main() {
	task()

	fmt.Println("Timer starting")
	s := gocron.NewScheduler(time.UTC)

	_, _ = s.Every(30).Minutes().Do(task)
	fmt.Println(s.TaskPresent(task))
	s.StartBlocking()

}  

I found the right parameters to put into the Command line to run another Go Script. My other main issue was not having the s.StartBlocking() Function to stop Main from exiting the program. It all works great! This package has been really helpful, I hope I can help contribute to it when I get to a higher skill level.

The other thing I was wondering is if there is some kind of function within Gocron to have this script run while the computer is asleep? Like say having my laptop lid closed. I tested this with the current code and it looked like it stopped running while asleep. But started back up again when I opened the lid and logged in.

[JohnRoesler]

Awesome news! Regarding the ability to run while asleep, that wouldn’t be related to this library but would be a matter of how your computer is architected. During sleep, no I wouldn’t expect it would run. You can change your settings so it doesn’t sleep when the lid is closed and then it would still run.

[Chemical-Battery]

I feel silly for not realizing that. Okay, then this should work great for my project at work. Thanks again!

[JohnRoesler]

No worries! We were all there once!