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package main
import (
"fmt"
"io"
"io/ioutil"
"os"
"github.com/containers/image/directory"
dockerarchive "github.com/containers/image/docker/archive"
ociarchive "github.com/containers/image/oci/archive"
"github.com/containers/libpod/cmd/podman/libpodruntime"
"github.com/containers/libpod/libpod/image"
"github.com/pkg/errors"
"github.com/urfave/cli"
)
var (
loadFlags = []cli.Flag{
cli.StringFlag{
Name: "input, i",
Usage: "Read from archive file, default is STDIN",
Value: "/dev/stdin",
},
cli.BoolFlag{
Name: "quiet, q",
Usage: "Suppress the output",
},
cli.StringFlag{
Name: "signature-policy",
Usage: "`pathname` of signature policy file (not usually used)",
},
}
loadDescription = "Loads the image from docker-archive stored on the local machine."
loadCommand = cli.Command{
Name: "load",
Usage: "Load an image from docker archive",
Description: loadDescription,
Flags: loadFlags,
Action: loadCmd,
ArgsUsage: "",
OnUsageError: usageErrorHandler,
}
)
// loadCmd gets the image/file to be loaded from the command line
// and calls loadImage to load the image to containers-storage
func loadCmd(c *cli.Context) error {
args := c.Args()
var imageName string
if len(args) == 1 {
imageName = args[0]
}
if len(args) > 1 {
return errors.New("too many arguments. Requires exactly 1")
}
if err := validateFlags(c, loadFlags); err != nil {
return err
}
runtime, err := libpodruntime.GetRuntime(c)
if err != nil {
return errors.Wrapf(err, "could not get runtime")
}
defer runtime.Shutdown(false)
input := c.String("input")
if input == "/dev/stdin" {
fi, err := os.Stdin.Stat()
if err != nil {
return err
}
// checking if loading from pipe
if !fi.Mode().IsRegular() {
outFile, err := ioutil.TempFile("/var/tmp", "podman")
if err != nil {
return errors.Errorf("error creating file %v", err)
}
defer os.Remove(outFile.Name())
defer outFile.Close()
inFile, err := os.OpenFile(input, 0, 0666)
if err != nil {
return errors.Errorf("error reading file %v", err)
}
defer inFile.Close()
_, err = io.Copy(outFile, inFile)
if err != nil {
return errors.Errorf("error copying file %v", err)
}
input = outFile.Name()
}
}
if err := validateFileName(input); err != nil {
return err
}
var writer io.Writer
if !c.Bool("quiet") {
writer = os.Stderr
}
ctx := getContext()
var newImages []*image.Image
src, err := dockerarchive.ParseReference(input) // FIXME? We should add dockerarchive.NewReference()
if err == nil {
newImages, err = runtime.ImageRuntime().LoadFromArchiveReference(ctx, src, c.String("signature-policy"), writer)
}
if err != nil {
// generate full src name with specified image:tag
src, err := ociarchive.NewReference(input, imageName) // imageName may be ""
if err == nil {
newImages, err = runtime.ImageRuntime().LoadFromArchiveReference(ctx, src, c.String("signature-policy"), writer)
}
if err != nil {
src, err := directory.NewReference(input)
if err == nil {
newImages, err = runtime.ImageRuntime().LoadFromArchiveReference(ctx, src, c.String("signature-policy"), writer)
}
if err != nil {
return errors.Wrapf(err, "error pulling %q", input)
}
}
}
fmt.Println("Loaded image(s): " + getImageNames(newImages))
return nil
}
func getImageNames(images []*image.Image) string {
var names string
for i := range images {
if i == 0 {
names = images[i].InputName
} else {
names += ", " + images[i].InputName
}
}
return names
}
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