Add podman commit command

podman commit allows the user to commit containers
as images with options of tagging th image, setting
a commit message, setting the auther, and making
changes to the instructions.

Signed-off-by: umohnani8 <umohnani@redhat.com>

Closes: #143
Approved by: rhatdan

2 files changed, 35 insertions, 3 deletions

diff --git a/libpod/container.go b/libpod/container.go
index 15ad1f49a..dc22c9c61 100644
--- a/libpod/container.go
+++ b/libpod/container.go
@@ -890,6 +890,10 @@ func (c *Container) Export(path string) error {
 		return err
 	}
 
+	return c.export(path)
+}
+
+func (c *Container) export(path string) error {
 	mountPoint := c.state.Mountpoint
 	if !c.state.Mounted {
 		mount, err := c.runtime.store.Mount(c.ID(), c.config.MountLabel)
@@ -965,8 +969,36 @@ func (c *Container) Inspect(size bool) (*ContainerInspectData, error) {
 
 // Commit commits the changes between a container and its image, creating a new
 // image
-func (c *Container) Commit() (*storage.Image, error) {
-	return nil, ErrNotImplemented
+func (c *Container) Commit(pause bool, options CopyOptions) error {
+	c.lock.Lock()
+	defer c.lock.Unlock()
+
+	if err := c.syncContainer(); err != nil {
+		return err
+	}
+
+	if c.state.State == ContainerStateRunning && pause {
+		if err := c.runtime.ociRuntime.pauseContainer(c); err != nil {
+			return errors.Wrapf(err, "error pausing container %q", c.ID())
+		}
+		defer func() {
+			if err := c.runtime.ociRuntime.unpauseContainer(c); err != nil {
+				logrus.Errorf("error unpausing container %q: %v", c.ID(), err)
+			}
+		}()
+	}
+
+	tempFile, err := ioutil.TempFile(c.runtime.config.TmpDir, "podman-commit")
+	if err != nil {
+		return errors.Wrapf(err, "error creating temp file")
+	}
+	defer os.Remove(tempFile.Name())
+	defer tempFile.Close()
+
+	if err := c.export(tempFile.Name()); err != nil {
+		return err
+	}
+	return c.runtime.ImportImage(tempFile.Name(), options)
 }
 
 // Wait blocks on a container to exit and returns its exit code
diff --git a/libpod/image_inspect.go b/libpod/image_inspect.go
index a08665434..3d904e64b 100644
--- a/libpod/image_inspect.go
+++ b/libpod/image_inspect.go
@@ -47,7 +47,7 @@ func getImageData(img storage.Image, imgRef types.Image, size int64, driver *dri
 		RepoDigests:  repoDigests,
 		Comment:      ociv1Img.History[0].Comment,
 		Created:      ociv1Img.Created,
-		Author:       ociv1Img.History[0].Author,
+		Author:       ociv1Img.Author,
 		Architecture: ociv1Img.Architecture,
 		Os:           ociv1Img.OS,
 		Config:       &ociv1Img.Config,