Validate input path exists in addInputPath

mfer/manifest.go

@@ -6,6 +6,7 @@ import (
 	"errors"
 	"fmt"
 	"io/fs"
+	"os"
 	"path"
 	"path/filepath"
 	"strings"
@@ -64,7 +65,10 @@ func (m *manifest) addInputPath(inputPath string) error {
 	if err != nil {
 		return err
 	}
-	// FIXME check to make sure inputPath/abs exists maybe
+	// Validate path exists
+	if _, err := os.Stat(abs); err != nil {
+		return fmt.Errorf("path does not exist: %s", inputPath)
+	}
 	afs := afero.NewReadOnlyFs(afero.NewBasePathFs(afero.NewOsFs(), abs))
 	return m.addInputFS(afs)
 }