70 lines
1.6 KiB
Go
70 lines
1.6 KiB
Go
package main
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import (
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"os"
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"github.com/pkg/errors"
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"github.com/projectatomic/libpod/cmd/podman/libpodruntime"
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"github.com/sirupsen/logrus"
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"github.com/urfave/cli"
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)
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var (
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exportFlags = []cli.Flag{
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cli.StringFlag{
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Name: "output, o",
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Usage: "Write to a file, default is STDOUT",
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Value: "/dev/stdout",
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},
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}
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exportDescription = "Exports container's filesystem contents as a tar archive" +
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" and saves it on the local machine."
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exportCommand = cli.Command{
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Name: "export",
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Usage: "Export container's filesystem contents as a tar archive",
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Description: exportDescription,
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Flags: exportFlags,
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Action: exportCmd,
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ArgsUsage: "CONTAINER",
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}
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)
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// exportCmd saves a container to a tarball on disk
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func exportCmd(c *cli.Context) error {
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if err := validateFlags(c, exportFlags); err != nil {
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return err
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}
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runtime, err := libpodruntime.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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args := c.Args()
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if len(args) == 0 {
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return errors.Errorf("container id must be specified")
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}
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if len(args) > 1 {
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return errors.Errorf("too many arguments given, need 1 at most.")
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}
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output := c.String("output")
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if output == "/dev/stdout" {
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file := os.Stdout
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if logrus.IsTerminal(file) {
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return errors.Errorf("refusing to export to terminal. Use -o flag or redirect")
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}
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}
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if err := validateFileName(output); err != nil {
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return err
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}
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ctr, err := runtime.LookupContainer(args[0])
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if err != nil {
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return errors.Wrapf(err, "error looking up container %q", args[0])
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}
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return ctr.Export(output)
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}
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