Fix handling of working dir

Buildah and podman build can create images without a working dir.

FROM fedora
WORKDIR /test

If you build this image with caching twice, the second time the image
will not have a working dir.

Similarly if you execute

podman run --workdir /foobar fedora

It blows up since the workingdir is not created automatically.

Finally there was duplicated code for getting the workingdir
out of an image, that this PR removes.

Signed-off-by: Daniel J Walsh <dwalsh@redhat.com>

3 files changed, 10 insertions, 18 deletions

diff --git a/pkg/specgen/container_validate.go b/pkg/specgen/container_validate.go
index 1a1bb4526..8289e2089 100644
--- a/pkg/specgen/container_validate.go
+++ b/pkg/specgen/container_validate.go
@@ -142,11 +142,6 @@ func (s *SpecGenerator) Validate() error {
 		return err
 	}
 
-	// The following are defaults as needed by container creation
-	if len(s.WorkDir) < 1 {
-		s.WorkDir = "/"
-	}
-
 	// Set defaults if network info is not provided
 	if s.NetNS.NSMode == "" {
 		s.NetNS.NSMode = Bridge
diff --git a/pkg/specgen/generate/container.go b/pkg/specgen/generate/container.go
index 65f8197bc..53d160442 100644
--- a/pkg/specgen/generate/container.go
+++ b/pkg/specgen/generate/container.go
@@ -135,15 +135,18 @@ func CompleteSpec(ctx context.Context, r *libpod.Runtime, s *specgen.SpecGenerat
 	s.Annotations = annotations
 
 	// workdir
-	if newImage != nil {
-		workingDir, err := newImage.WorkingDir(ctx)
-		if err != nil {
-			return nil, err
-		}
-		if len(s.WorkDir) < 1 && len(workingDir) > 1 {
+	if s.WorkDir == "" {
+		if newImage != nil {
+			workingDir, err := newImage.WorkingDir(ctx)
+			if err != nil {
+				return nil, err
+			}
 			s.WorkDir = workingDir
 		}
 	}
+	if s.WorkDir == "" {
+		s.WorkDir = "/"
+	}
 
 	if len(s.SeccompProfilePath) < 1 {
 		p, err := libpod.DefaultSeccompPath()
diff --git a/pkg/specgen/generate/container_create.go b/pkg/specgen/generate/container_create.go
index b61ac2c30..4635b755b 100644
--- a/pkg/specgen/generate/container_create.go
+++ b/pkg/specgen/generate/container_create.go
@@ -241,13 +241,7 @@ func createContainerOptions(ctx context.Context, rt *libpod.Runtime, s *specgen.
 	// If the user did not set an workdir but the image did, ensure it is
 	// created.
 	if s.WorkDir == "" && img != nil {
-		newWD, err := img.WorkingDir(ctx)
-		if err != nil {
-			return nil, err
-		}
-		if newWD != "" {
-			options = append(options, libpod.WithCreateWorkingDir())
-		}
+		options = append(options, libpod.WithCreateWorkingDir())
 	}
 	if s.StopSignal != nil {
 		options = append(options, libpod.WithStopSignal(*s.StopSignal))