package main import ( "os" "github.com/pkg/errors" "github.com/projectatomic/libpod/cmd/podman/libpodruntime" "github.com/sirupsen/logrus" "github.com/urfave/cli" ) var ( exportFlags = []cli.Flag{ cli.StringFlag{ Name: "output, o", Usage: "Write to a file, default is STDOUT", Value: "/dev/stdout", }, } exportDescription = "Exports container's filesystem contents as a tar archive" + " and saves it on the local machine." exportCommand = cli.Command{ Name: "export", Usage: "Export container's filesystem contents as a tar archive", Description: exportDescription, Flags: exportFlags, Action: exportCmd, ArgsUsage: "CONTAINER", } ) // exportCmd saves a container to a tarball on disk func exportCmd(c *cli.Context) error { if err := validateFlags(c, exportFlags); err != nil { return err } runtime, err := libpodruntime.GetRuntime(c) if err != nil { return errors.Wrapf(err, "could not get runtime") } defer runtime.Shutdown(false) args := c.Args() if len(args) == 0 { return errors.Errorf("container id must be specified") } if len(args) > 1 { return errors.Errorf("too many arguments given, need 1 at most.") } output := c.String("output") 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]) } return ctr.Export(output) }