116 lines
2.5 KiB
Go
116 lines
2.5 KiB
Go
package main
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import (
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"io"
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"io/ioutil"
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"os"
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"github.com/kubernetes-incubator/cri-o/libpod"
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"github.com/pkg/errors"
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"github.com/urfave/cli"
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)
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var (
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loadFlags = []cli.Flag{
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cli.StringFlag{
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Name: "input, i",
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Usage: "Read from archive file, default is STDIN",
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Value: "/dev/stdin",
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},
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cli.BoolFlag{
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Name: "quiet, q",
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Usage: "Suppress the output",
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},
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cli.StringFlag{
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Name: "signature-policy",
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Usage: "`pathname` of signature policy file (not usually used)",
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},
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}
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loadDescription = "Loads the image from docker-archive stored on the local machine."
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loadCommand = cli.Command{
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Name: "load",
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Usage: "load an image from docker archive",
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Description: loadDescription,
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Flags: loadFlags,
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Action: loadCmd,
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ArgsUsage: "",
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}
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)
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// loadCmd gets the image/file to be loaded from the command line
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// and calls loadImage to load the image to containers-storage
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func loadCmd(c *cli.Context) error {
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args := c.Args()
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var image string
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if len(args) == 1 {
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image = args[0]
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}
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if len(args) > 1 {
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return errors.New("too many arguments. Requires exactly 1")
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}
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if err := validateFlags(c, loadFlags); err != nil {
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return err
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}
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runtime, err := getRuntime(c)
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if err != nil {
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return errors.Wrapf(err, "could not get runtime")
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}
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defer runtime.Shutdown(false)
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input := c.String("input")
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if input == "/dev/stdin" {
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fi, err := os.Stdin.Stat()
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if err != nil {
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return err
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}
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// checking if loading from pipe
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if !fi.Mode().IsRegular() {
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outFile, err := ioutil.TempFile("/var/tmp", "kpod")
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if err != nil {
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return errors.Errorf("error creating file %v", err)
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}
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defer outFile.Close()
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defer os.Remove(outFile.Name())
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inFile, err := os.OpenFile(input, 0, 0666)
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if err != nil {
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return errors.Errorf("error reading file %v", err)
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}
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defer inFile.Close()
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_, err = io.Copy(outFile, inFile)
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if err != nil {
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return errors.Errorf("error copying file %v", err)
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}
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input = outFile.Name()
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}
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}
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var writer io.Writer
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if !c.Bool("quiet") {
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writer = os.Stdout
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}
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options := libpod.CopyOptions{
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SignaturePolicyPath: c.String("signature-policy"),
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Writer: writer,
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}
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src := libpod.DockerArchive + ":" + input
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if err := runtime.PullImage(src, options); err != nil {
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src = libpod.OCIArchive + ":" + input
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// generate full src name with specified image:tag
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if image != "" {
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src = src + ":" + image
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}
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if err := runtime.PullImage(src, options); err != nil {
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return errors.Wrapf(err, "error pulling %q", src)
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}
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}
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return nil
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}
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