feat: allow using a new process group for the terraform cli child pro…

…cess

tfexec/cmd.go

@@ -15,6 +15,7 @@ import (
 	"os"
 	"os/exec"
 	"strings"
+	"syscall"
 
 	"github.com/hashicorp/terraform-exec/internal/version"
 )
@@ -187,6 +188,12 @@ func (tf *Terraform) buildTerraformCmd(ctx context.Context, mergeEnv map[string]
 
 	cmd.Env = tf.buildEnv(mergeEnv)
 	cmd.Dir = tf.workingDir
+	// Create a new process group for the command
+	if tf.useSepProcessGroup {
+		cmd.SysProcAttr = &syscall.SysProcAttr{
+			Setpgid: true,
+		}
+	}
 
 	tf.logger.Printf("[INFO] running Terraform command: %s", cmd.String())
 

tfexec/terraform.go

@@ -49,6 +49,7 @@ type Terraform struct {
 	appendUserAgent    string
 	disablePluginTLS   bool
 	skipProviderVerify bool
+	useSepProcessGroup bool
 	env                map[string]string
 
 	stdout io.Writer
@@ -136,6 +137,13 @@ func (tf *Terraform) SetStderr(w io.Writer) {
 	tf.stderr = w
 }
 
+// SetUseSeparateProcessGroup specifies whether to use a separate process group
+// when running Terraform Cmd.
+func (tf *Terraform) SetUseSeparateProcessGroup(use bool) error {
+	tf.useSepProcessGroup = use
+	return nil
+}
+
 // SetLog sets the TF_LOG environment variable for Terraform CLI execution.
 // This must be combined with a call to SetLogPath to take effect.
 //