fix: daemonize wl-copy

CHANGELOG.md

@@ -2,6 +2,7 @@
 
 **Notable bug fixes**
 
+- wl-copy is now truly daemonized, allowing calling `alacritty -e sh -c clipman pick`
 - fzf couldn't recover the clipboard content in some cases
 
 # 1.5.1

main.go

@@ -11,6 +11,7 @@ import (
 	"os"
 	"os/exec"
 	"strings"
+	"syscall"
 
 	"gopkg.in/alecthomas/kingpin.v2"
 )
@@ -178,8 +179,14 @@ func serveTxt(s string) {
 		smartLog(fmt.Sprintf("couldn't find wl-copy: %v\n", err), "low", *alert)
 	}
 
+	// daemonize wl-copy into a truly independent process
+	// necessary for running stuff like `alacritty -e sh -c clipman pick`
+	attr := &syscall.SysProcAttr{
+		Setpgid: true,
+	}
+
 	// we mandate the mime type because we know we can only serve text; not doing this leads to weird bugs like #35
-	cmd := exec.Cmd{Path: bin, Args: []string{bin, "-t", "TEXT"}, Stdin: strings.NewReader(s)}
+	cmd := exec.Cmd{Path: bin, Args: []string{bin, "-t", "TEXT"}, Stdin: strings.NewReader(s), SysProcAttr: attr}
 	if err := cmd.Run(); err != nil {
 		smartLog(fmt.Sprintf("error running wl-copy: %s\n", err), "low", *alert)
 	}