Allow compiling and running the project on macOS and windows

[gabriel-vasile]

Hi, I'm trying to run the project locally, on macos, and I'm having trouble.

To reproduce my problem, you can try compiling the project for macos/windows:

# GOOS=darwin GOARCH=arm64 go build cmd/*.go
GOOS=windows GOARCH=amd64 go build cmd/*.go

cmd/init.go:705:19: undefined: syscall.Utsname
cmd/init.go:712:20: undefined: syscall.Uname
cmd/settings.go:302:19: undefined: syscall.Utsname
cmd/settings.go:307:20: undefined: syscall.Uname

uname syscall is only available for linux in golang. This code does not compile on macos/windows:

listmonk/cmd/init.go

Lines 703 to 714 in a440b79

	var (
	mem runtime.MemStats
	utsname syscall.Utsname
	)
	// Memory / alloc stats.
	runtime.ReadMemStats(&mem)
	// OS info.
	if err := syscall.Uname(&utsname); err != nil {
	lo.Printf("WARNING: error getting system info: %v", err)
	}

A more portable way to write that bit of code is to use Utsname and Uname from the golang.org/x/sys/unix package, but that does not work for windows.

[knadh]

Thanks for the PR. There was a broken import in it, which I've fixed and merged in a separate commit.

[gabriel-vasile]

Ah sorry, there were two places where syscall.Uname is used:

1. dcb87a3
2. The code I linked in first message here

Second place is still blocking compilation on macos/win.

[anascann]

hello, @knadh syscall is still blocking the compilation for mac OSX.

1. https://github.com/knadh/listmonk/blob/master/cmd/init.go#L705
2. https://github.com/knadh/listmonk/blob/master/cmd/init.go#L712

this is the place where system about info is getting initialized in app.about .

[knadh]

Had to get rid of the field altogether! 104c4fc

[gabriel-vasile]

Thank you!