Fix cmd/config windows issues

kyaml/fn/runtime/container/container.go

@@ -194,9 +194,12 @@ func (c *Filter) getCommand() (string, []string) {
 
 	// export the local environment vars to the container
 	for _, pair := range os.Environ() {
-		args = append(args, "-e", strings.Split(pair, "=")[0])
+		items := strings.Split(pair, "=")
+		if items[0] == "" || items[1] == "" {
+			continue
+		}
+		args = append(args, "-e", items[0])
 	}
 	a := append(args, c.Image)
-
 	return "docker", a
 }

kyaml/fn/runtime/container/container_test.go

@@ -103,7 +103,11 @@ metadata:
 			// configure expected env
 			for _, e := range os.Environ() {
 				// the process env
-				tt.expectedArgs = append(tt.expectedArgs, "-e", strings.Split(e, "=")[0])
+				parts := strings.Split(e, "=")
+				if parts[0] == "" || parts[1] == "" {
+					continue
+				}
+				tt.expectedArgs = append(tt.expectedArgs, "-e", parts[0])
 			}
 			tt.expectedArgs = append(tt.expectedArgs, tt.instance.Image)
 

kyaml/fn/runtime/exec/exec.go

@@ -5,6 +5,7 @@ package exec
 
 import (
 	"io"
+	"os"
 	"os/exec"
 
 	"sigs.k8s.io/kustomize/kyaml/fn/runtime/runtimeutil"
@@ -30,5 +31,6 @@ func (c *Filter) Run(reader io.Reader, writer io.Writer) error {
 	cmd := exec.Command(c.Path, c.Args...)
 	cmd.Stdin = reader
 	cmd.Stdout = writer
+	cmd.Stderr = os.Stderr
 	return cmd.Run()
 }

kyaml/fn/runtime/runtimeutil/functiontypes.go

@@ -5,6 +5,7 @@ package runtimeutil
 
 import (
 	"fmt"
+	"os"
 	"strings"
 
 	"sigs.k8s.io/kustomize/kyaml/yaml"
@@ -121,7 +122,10 @@ func getFunctionSpecFromAnnotation(n *yaml.RNode, meta yaml.ResourceMeta) *Funct
 	for _, s := range functionAnnotationKeys {
 		fn := meta.Annotations[s]
 		if fn != "" {
-			_ = yaml.Unmarshal([]byte(fn), &fs)
+			err := yaml.Unmarshal([]byte(fn), &fs)
+			if err != nil {
+				fmt.Fprintf(os.Stderr, "%v\n", err)
+			}
 			return &fs
 		}
 	}
@@ -131,9 +135,12 @@ func getFunctionSpecFromAnnotation(n *yaml.RNode, meta yaml.ResourceMeta) *Funct
 	}
 	s, err := n.String()
 	if err != nil {
-		return nil
+		fmt.Fprintf(os.Stderr, "%v\n", err)
+	}
+	err = yaml.Unmarshal([]byte(s), &fs)
+	if err != nil {
+		fmt.Fprintf(os.Stderr, "%v\n", err)
 	}
-	_ = yaml.Unmarshal([]byte(s), &fs)
 	return &fs
 }