container-commit: support --squash to squash layers into one

Allow users to commit containers into a single layer.

Usage
```bash
podman container commit --squash <name>
```

Signed-off-by: Aditya R <arajan@redhat.com>

1 files changed, 2 insertions, 0 deletions

diff --git a/libpod/container_commit.go b/libpod/container_commit.go
index 99d08ccf1..7018ee7d8 100644
--- a/libpod/container_commit.go
+++ b/libpod/container_commit.go
@@ -27,6 +27,7 @@ type ContainerCommitOptions struct {
 	Author         string
 	Message        string
 	Changes        []string
+	Squash         bool
 }
 
 // Commit commits the changes between a container and its image, creating a new
@@ -63,6 +64,7 @@ func (c *Container) Commit(ctx context.Context, destImage string, options Contai
 	commitOptions := buildah.CommitOptions{
 		SignaturePolicyPath:   options.SignaturePolicyPath,
 		ReportWriter:          options.ReportWriter,
+		Squash:                options.Squash,
 		SystemContext:         c.runtime.imageContext,
 		PreferredManifestType: options.PreferredManifestType,
 	}