podman: accept option --rootfs to use exploded images

Signed-off-by: Giuseppe Scrivano <gscrivan@redhat.com>

Closes: #871
Approved by: mheon

1 files changed, 21 insertions, 0 deletions

diff --git a/libpod/options.go b/libpod/options.go
index 34bde3211..02bcb8628 100644
--- a/libpod/options.go
+++ b/libpod/options.go
@@ -2,6 +2,7 @@ package libpod
 
 import (
 	"net"
+	"os"
 	"path/filepath"
 	"regexp"
 	"syscall"
@@ -361,6 +362,9 @@ func WithRootFSFromImage(imageID string, imageName string, useImageVolumes bool)
 		if ctr.config.RootfsImageID != "" || ctr.config.RootfsImageName != "" {
 			return errors.Wrapf(ErrInvalidArg, "container already configured with root filesystem")
 		}
+		if ctr.config.Rootfs != "" {
+			return errors.Wrapf(ErrInvalidArg, "cannot set both an image ID and a rootfs for a container")
+		}
 
 		ctr.config.RootfsImageID = imageID
 		ctr.config.RootfsImageName = imageName
@@ -909,6 +913,23 @@ func WithCommand(command []string) CtrCreateOption {
 	}
 }
 
+// WithRootFS sets the rootfs for the container
+func WithRootFS(rootfs string) CtrCreateOption {
+	return func(ctr *Container) error {
+		if ctr.valid {
+			return ErrCtrFinalized
+		}
+		if _, err := os.Stat(rootfs); err != nil {
+			return errors.Wrapf(err, "error checking path %q", rootfs)
+		}
+		if ctr.config.RootfsImageID != "" {
+			return errors.Wrapf(ErrInvalidArg, "cannot set both an image ID and a rootfs for a container")
+		}
+		ctr.config.Rootfs = rootfs
+		return nil
+	}
+}
+
 // Pod Creation Options
 
 // WithPodName sets the name of the pod.