fix: Use absolute path for reading manifest

Closes: vmware#3550

ovf/importer/importer.go

@@ -21,7 +21,6 @@ import (
 	"context"
 	"errors"
 	"fmt"
-	"os"
 	"path"
 	"path/filepath"
 	"strings"
@@ -61,12 +60,11 @@ type Importer struct {
 func (imp *Importer) ReadManifest(fpath string) error {
 	base := filepath.Base(fpath)
 	ext := filepath.Ext(base)
-	mfName := strings.Replace(base, ext, ".mf", 1)
+	mfPath := filepath.Join(filepath.Dir(fpath), strings.Replace(base, ext, ".mf", 1))
 
-	mf, _, err := imp.Archive.Open(mfName)
+	mf, _, err := imp.Archive.Open(mfPath)
 	if err != nil {
-		msg := fmt.Sprintf("manifest %q: %s", mf, err)
-		fmt.Fprintln(os.Stderr, msg)
+		msg := fmt.Sprintf("failed to read manifest %q: %s", mf, err)
 		return errors.New(msg)
 	}
 	imp.Manifest, err = library.ReadManifest(mf)