podman-remote import|export

addition of import and export for the podman-remote client.  This includes
the ability to send and receive files between the remote-client and the
"podman" host using an upgraded varlink connection.

Signed-off-by: baude <bbaude@redhat.com>

7 files changed, 22 insertions, 117 deletions

diff --git a/cmd/podman/commands.go b/cmd/podman/commands.go
index 718717009..d8fdd556f 100644
--- a/cmd/podman/commands.go
+++ b/cmd/podman/commands.go
@@ -12,8 +12,6 @@ func getAppCommands() []cli.Command {
 		createCommand,
 		diffCommand,
 		execCommand,
-		exportCommand,
-		importCommand,
 		killCommand,
 		kubeCommand,
 		loadCommand,
diff --git a/cmd/podman/container.go b/cmd/podman/container.go
index acbcbb644..29300a6a4 100644
--- a/cmd/podman/container.go
+++ b/cmd/podman/container.go
@@ -8,6 +8,7 @@ import (
 
 var (
 	containerSubCommands = []cli.Command{
+		exportCommand,
 		inspectCommand,
 	}
 	containerDescription = "Manage containers"
diff --git a/cmd/podman/export.go b/cmd/podman/export.go
index c0e63bd2a..eaa4e38a2 100644
--- a/cmd/podman/export.go
+++ b/cmd/podman/export.go
@@ -1,12 +1,9 @@
 package main
 
 import (
-	"io/ioutil"
 	"os"
-	"strconv"
 
-	"github.com/containers/libpod/cmd/podman/libpodruntime"
-	"github.com/containers/libpod/libpod"
+	"github.com/containers/libpod/libpod/adapter"
 	"github.com/containers/libpod/pkg/rootless"
 	"github.com/pkg/errors"
 	"github.com/sirupsen/logrus"
@@ -43,7 +40,7 @@ func exportCmd(c *cli.Context) error {
 		rootless.SetSkipStorageSetup(true)
 	}
 
-	runtime, err := libpodruntime.GetRuntime(c)
+	runtime, err := adapter.GetRuntime(c)
 	if err != nil {
 		return errors.Wrapf(err, "could not get runtime")
 	}
@@ -58,52 +55,18 @@ func exportCmd(c *cli.Context) error {
 	}
 
 	output := c.String("output")
+	if runtime.Remote && (output == "/dev/stdout" || len(output) == 0) {
+		return errors.New("remote client usage must specify an output file (-o)")
+	}
 	if output == "/dev/stdout" {
 		file := os.Stdout
 		if logrus.IsTerminal(file) {
 			return errors.Errorf("refusing to export to terminal. Use -o flag or redirect")
 		}
 	}
+
 	if err := validateFileName(output); err != nil {
 		return err
 	}
-
-	ctr, err := runtime.LookupContainer(args[0])
-	if err != nil {
-		return errors.Wrapf(err, "error looking up container %q", args[0])
-	}
-
-	if os.Geteuid() != 0 {
-		state, err := ctr.State()
-		if err != nil {
-			return errors.Wrapf(err, "cannot read container state %q", ctr.ID())
-		}
-		if state == libpod.ContainerStateRunning || state == libpod.ContainerStatePaused {
-			data, err := ioutil.ReadFile(ctr.Config().ConmonPidFile)
-			if err != nil {
-				return errors.Wrapf(err, "cannot read conmon PID file %q", ctr.Config().ConmonPidFile)
-			}
-			conmonPid, err := strconv.Atoi(string(data))
-			if err != nil {
-				return errors.Wrapf(err, "cannot parse PID %q", data)
-			}
-			became, ret, err := rootless.JoinDirectUserAndMountNS(uint(conmonPid))
-			if err != nil {
-				return err
-			}
-			if became {
-				os.Exit(ret)
-			}
-		} else {
-			became, ret, err := rootless.BecomeRootInUserNS()
-			if err != nil {
-				return err
-			}
-			if became {
-				os.Exit(ret)
-			}
-		}
-	}
-
-	return ctr.Export(output)
+	return runtime.Export(args[0], c.String("output"))
 }
diff --git a/cmd/podman/image.go b/cmd/podman/image.go
index a51a90b0e..6b451a1ca 100644
--- a/cmd/podman/image.go
+++ b/cmd/podman/image.go
@@ -8,6 +8,7 @@ import (
 
 var (
 	imageSubCommands = []cli.Command{
+		importCommand,
 		historyCommand,
 		imageExistsCommand,
 		inspectCommand,
diff --git a/cmd/podman/import.go b/cmd/podman/import.go
index 144354fa6..661bd5a65 100644
--- a/cmd/podman/import.go
+++ b/cmd/podman/import.go
@@ -2,16 +2,8 @@ package main
 
 import (
 	"fmt"
-	"io"
-	"io/ioutil"
-	"net/http"
-	"net/url"
-	"os"
 
-	"github.com/containers/libpod/cmd/podman/libpodruntime"
-	"github.com/containers/libpod/libpod/image"
-	"github.com/containers/libpod/pkg/util"
-	"github.com/opencontainers/image-spec/specs-go/v1"
+	"github.com/containers/libpod/libpod/adapter"
 	"github.com/pkg/errors"
 	"github.com/urfave/cli"
 )
@@ -51,7 +43,7 @@ func importCmd(c *cli.Context) error {
 		return err
 	}
 
-	runtime, err := libpodruntime.GetRuntime(c)
+	runtime, err := adapter.GetRuntime(c)
 	if err != nil {
 		return errors.Wrapf(err, "could not get runtime")
 	}
@@ -60,7 +52,6 @@ func importCmd(c *cli.Context) error {
 	var (
 		source    string
 		reference string
-		writer    io.Writer
 	)
 
 	args := c.Args()
@@ -80,67 +71,13 @@ func importCmd(c *cli.Context) error {
 		return err
 	}
 
-	changes := v1.ImageConfig{}
-	if c.IsSet("change") || c.IsSet("c") {
-		changes, err = util.GetImageConfig(c.StringSlice("change"))
-		if err != nil {
-			return errors.Wrapf(err, "error adding config changes to image %q", source)
-		}
+	quiet := c.Bool("quiet")
+	if runtime.Remote {
+		quiet = false
 	}
-
-	history := []v1.History{
-		{Comment: c.String("message")},
-	}
-
-	config := v1.Image{
-		Config:  changes,
-		History: history,
-	}
-
-	writer = nil
-	if !c.Bool("quiet") {
-		writer = os.Stderr
-	}
-
-	// if source is a url, download it and save to a temp file
-	u, err := url.ParseRequestURI(source)
-	if err == nil && u.Scheme != "" {
-		file, err := downloadFromURL(source)
-		if err != nil {
-			return err
-		}
-		defer os.Remove(file)
-		source = file
-	}
-
-	newImage, err := runtime.ImageRuntime().Import(getContext(), source, reference, writer, image.SigningOptions{}, config)
+	iid, err := runtime.Import(getContext(), source, reference, c.StringSlice("change"), c.String("message"), quiet)
 	if err == nil {
-		fmt.Println(newImage.ID())
+		fmt.Println(iid)
 	}
 	return err
 }
-
-// donwloadFromURL downloads an image in the format "https:/example.com/myimage.tar"
-// and temporarily saves in it /var/tmp/importxyz, which is deleted after the image is imported
-func downloadFromURL(source string) (string, error) {
-	fmt.Printf("Downloading from %q\n", source)
-
-	outFile, err := ioutil.TempFile("/var/tmp", "import")
-	if err != nil {
-		return "", errors.Wrap(err, "error creating file")
-	}
-	defer outFile.Close()
-
-	response, err := http.Get(source)
-	if err != nil {
-		return "", errors.Wrapf(err, "error downloading %q", source)
-	}
-	defer response.Body.Close()
-
-	_, err = io.Copy(outFile, response.Body)
-	if err != nil {
-		return "", errors.Wrapf(err, "error saving %s to %s", source, outFile.Name())
-	}
-
-	return outFile.Name(), nil
-}
diff --git a/cmd/podman/main.go b/cmd/podman/main.go
index c10590006..1ca8882eb 100644
--- a/cmd/podman/main.go
+++ b/cmd/podman/main.go
@@ -88,9 +88,11 @@ func main() {
 
 	app.Commands = []cli.Command{
 		containerCommand,
+		exportCommand,
 		historyCommand,
 		imageCommand,
 		imagesCommand,
+		importCommand,
 		infoCommand,
 		inspectCommand,
 		pullCommand,
diff --git a/cmd/podman/varlink/io.podman.varlink b/cmd/podman/varlink/io.podman.varlink
index 8b02057a1..101232b0c 100644
--- a/cmd/podman/varlink/io.podman.varlink
+++ b/cmd/podman/varlink/io.podman.varlink
@@ -688,7 +688,7 @@ method Commit(name: string, image_name: string, changes: []string, author: strin
 
 # ImportImage imports an image from a source (like tarball) into local storage.  The image can have additional
 # descriptions added to it using the message and changes options. See also [ExportImage](ExportImage).
-method ImportImage(source: string, reference: string, message: string, changes: []string) -> (image: string)
+method ImportImage(source: string, reference: string, message: string, changes: []string, delete: bool) -> (image: string)
 
 # ExportImage takes the name or ID of an image and exports it to a destination like a tarball.  There is also
 # a booleon option to force compression.  It also takes in a string array of tags to be able to save multiple
@@ -1050,6 +1050,9 @@ method ContainerInspectData(name: string) -> (config: string)
 # development of Podman only and generally should not be used.
 method ContainerStateData(name: string) -> (config: string)
 
+method SendFile(type: string, length: int) -> (file_handle: string)
+method ReceiveFile(path: string, delete: bool) -> (len: int)
+
 # ImageNotFound means the image could not be found by the provided name or ID in local storage.
 error ImageNotFound (name: string)