Isolate Ctrl+Break to dev server instead of console (temporalio#1140)

* Avoid sending Ctrl+C to all processes in console

* update windows interrupt

* start dev server in new proc group on windows

testsuite/devserver.go

@@ -109,8 +109,8 @@ func StartDevServer(ctx context.Context, options DevServerOptions) (*DevServer,
 	}
 
 	args := prepareCommand(&options, host, port, clientOptions.Namespace)
-	cmd := exec.Command(exePath, args...)
-	cmd.Stdout, cmd.Stderr = os.Stdout, os.Stderr
+
+	cmd := newCmd(exePath, args...)
 	clientOptions.Logger.Info("Starting DevServer", "ExePath", exePath, "Args", args)
 	if err := cmd.Start(); err != nil {
 		return nil, fmt.Errorf("failed starting: %w", err)

testsuite/interrupt_nonwindows.go → testsuite/process_nonwindows.go

@@ -26,9 +26,17 @@ package testsuite
 
 import (
 	"os"
+	"os/exec"
 	"syscall"
 )
 
+// newCmd creates a new command with the given executable path and arguments.
+func newCmd(exePath string, args ...string) *exec.Cmd {
+	cmd := exec.Command(exePath, args...)
+	cmd.Stdout, cmd.Stderr = os.Stdout, os.Stderr
+	return cmd
+}
+
 // sendInterrupt sends an interrupt signal to the given process for graceful shutdown.
 func sendInterrupt(process *os.Process) error {
 	return process.Signal(syscall.SIGINT)

testsuite/interrupt_windows.go → testsuite/process_windows.go

@@ -24,41 +24,35 @@ package testsuite
 
 import (
 	"os"
+	"os/exec"
 	"syscall"
 
 	"golang.org/x/sys/windows"
 )
 
+// newCmd creates a new command with the given executable path and arguments.
+func newCmd(exePath string, args ...string) *exec.Cmd {
+	cmd := exec.Command(exePath, args...)
+	cmd.SysProcAttr = &syscall.SysProcAttr{
+		// isolate the process and signals sent to it from the current console
+		CreationFlags: syscall.CREATE_NEW_PROCESS_GROUP,
+	}
+	cmd.Stdout, cmd.Stderr = os.Stdout, os.Stderr
+	return cmd
+}
+
 // sendInterrupt calls the break event on the given process for graceful shutdown.
 func sendInterrupt(process *os.Process) error {
 	dll, err := windows.LoadDLL("kernel32.dll")
 	if err != nil {
 		return err
 	}
-	defer dll.Release()
-	f, err := dll.FindProc("AttachConsole")
-	if err != nil {
-		return err
-	}
-	r1, _, err := f.Call(uintptr(process.Pid))
-	if r1 == 0 && err != syscall.ERROR_ACCESS_DENIED {
-		return err
-	}
-
-	f, err = dll.FindProc("SetConsoleCtrlHandler")
-	if err != nil {
-		return err
-	}
-	r1, _, err = f.Call(0, 1)
-	if r1 == 0 {
-		return err
-	}
-	f, err = dll.FindProc("GenerateConsoleCtrlEvent")
+	p, err := dll.FindProc("GenerateConsoleCtrlEvent")
 	if err != nil {
 		return err
 	}
-	r1, _, err = f.Call(windows.CTRL_BREAK_EVENT, uintptr(process.Pid))
-	if r1 == 0 {
+	r, _, err := p.Call(uintptr(windows.CTRL_BREAK_EVENT), uintptr(process.Pid))
+	if r == 0 {
 		return err
 	}
 	return nil