Hide console on windows

The companion does no longer show a terminal window pop up

cmd/companion/commands.go

@@ -57,7 +57,9 @@ func runOpenCommand(template, path string) error {
 	if !sawPath {
 		tokens = append(tokens, path)
 	}
-	return exec.Command(tokens[0], tokens[1:]...).Start()
+	cmd := exec.Command(tokens[0], tokens[1:]...)
+	hideConsole(cmd)
+	return cmd.Start()
 }
 
 // tokenizeCommand splits a command-line string into argv tokens, honouring

cmd/companion/commands_other.go

@@ -0,0 +1,8 @@
+//go:build !windows
+
+package main
+
+import "os/exec"
+
+// Allows running commands without showing a terminal window on startup when not running on windows
+func hideConsole(*exec.Cmd) {}

cmd/companion/commands_windows.go

@@ -0,0 +1,18 @@
+package main
+
+import (
+	"os/exec"
+	"syscall"
+)
+
+// This is the windows CREATE_NO_WINDOW syscall.
+// We have no golang.org/x/sys dependency, so this will suffice
+const createNoWindow = 0x08000000
+
+// Allows running commands without showing a terminal window on startup on windows
+func hideConsole(cmd *exec.Cmd) {
+	cmd.SysProcAttr = &syscall.SysProcAttr{
+		HideWindow: true,
+		CreationFlags: createNoWindow,
+	}
+}

cmd/companion/main.go

@@ -6,7 +6,7 @@ import (
 	"path/filepath"
 )
 
-const version = "1"
+const version = "2"
 
 func main() {
 	flag.Parse()