amfora/webbrowser/open_browser_unix.go
2021-12-22 20:39:17 -05:00

56 lines
1.8 KiB
Go

//go:build linux || freebsd || netbsd || openbsd
// +build linux freebsd netbsd openbsd
//nolint:goerr113
package webbrowser
import (
"fmt"
"os"
"os/exec"
)
// Open opens `url` in default system browser. It tries to do so in two
// ways (xdg-open and $BROWSER). It only works if there is a display
// server working.
//
// bouncepaw: I tried to support TTYs as well. The idea was to open
// a browser in foreground and return back to amfora after the browser
// is closed. While all browsers I tested opened correctly (w3m, lynx),
// I couldn't make it restore amfora correctly. The screen always ended
// up distorted. None of my stunts with altscreen buffers helped.
func Open(url string) (string, error) {
var (
// In prev versions there was also Xorg executable checked for.
// I don't see any reason to check for it.
xorgDisplay = os.Getenv("DISPLAY")
waylandDisplay = os.Getenv("WAYLAND_DISPLAY")
xdgOpenPath, xdgOpenNotFoundErr = exec.LookPath("xdg-open")
envBrowser = os.Getenv("BROWSER")
)
switch {
case xorgDisplay == "" && waylandDisplay == "":
return "", fmt.Errorf("no display server was found")
case xdgOpenNotFoundErr == nil: // Prefer xdg-open over $BROWSER
// Use start rather than run or output in order
// to make browser running in background.
proc := exec.Command(xdgOpenPath, url)
if err := proc.Start(); err != nil {
return "", err
}
//nolint:errcheck
go proc.Wait() // Prevent zombies, see #219
return "Opened in system default web browser", nil
case envBrowser != "":
proc := exec.Command(envBrowser, url)
if err := proc.Start(); err != nil {
return "", err
}
//nolint:errcheck
go proc.Wait() // Prevent zombies, see #219
return "Opened in system default web browser", nil
default:
return "", fmt.Errorf("could not determine system browser")
}
}