move check for working dir for exec functions

kyaml/fn/runtime/container/container.go

@@ -5,6 +5,7 @@ package container
 
 import (
 	"fmt"
+	"os"
 
 	runtimeexec "sigs.k8s.io/kustomize/kyaml/fn/runtime/exec"
 	"sigs.k8s.io/kustomize/kyaml/fn/runtime/runtimeutil"
@@ -139,19 +140,27 @@ func (c Filter) GetExit() error {
 }
 
 func (c *Filter) Filter(nodes []*yaml.RNode) ([]*yaml.RNode, error) {
-	c.setupExec()
+	if err := c.setupExec(); err != nil {
+		return nil, err
+	}
 	return c.Exec.Filter(nodes)
 }
 
-func (c *Filter) setupExec() {
+func (c *Filter) setupExec() error {
 	// don't init 2x
 	if c.Exec.Path != "" {
-		return
+		return nil
 	}
+	wd, err := os.Getwd()
+	if err != nil {
+		return err
+	}
+	c.Exec.WorkingDir = wd
 
 	path, args := c.getCommand()
 	c.Exec.Path = path
 	c.Exec.Args = args
+	return nil
 }
 
 // getArgs returns the command + args to run to spawn the container