/
export.go
82 lines (71 loc) · 2.59 KB
/
export.go
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package containers
import (
"context"
"os"
"github.com/containers/common/pkg/completion"
"github.com/containers/podman/v2/cmd/podman/common"
"github.com/containers/podman/v2/cmd/podman/parse"
"github.com/containers/podman/v2/cmd/podman/registry"
"github.com/containers/podman/v2/pkg/domain/entities"
"github.com/pkg/errors"
"github.com/spf13/cobra"
"golang.org/x/crypto/ssh/terminal"
)
var (
exportDescription = "Exports container's filesystem contents as a tar archive" +
" and saves it on the local machine."
exportCommand = &cobra.Command{
Use: "export [options] CONTAINER",
Short: "Export container's filesystem contents as a tar archive",
Long: exportDescription,
RunE: export,
Args: cobra.ExactArgs(1),
ValidArgsFunction: common.AutocompleteContainers,
Example: `podman export ctrID > myCtr.tar
podman export --output="myCtr.tar" ctrID`,
}
containerExportCommand = &cobra.Command{
Args: cobra.ExactArgs(1),
Use: exportCommand.Use,
Short: exportCommand.Short,
Long: exportCommand.Long,
RunE: exportCommand.RunE,
ValidArgsFunction: exportCommand.ValidArgsFunction,
Example: `podman container export ctrID > myCtr.tar
podman container export --output="myCtr.tar" ctrID`,
}
)
var (
exportOpts entities.ContainerExportOptions
)
func exportFlags(cmd *cobra.Command) {
flags := cmd.Flags()
outputFlagName := "output"
flags.StringVarP(&exportOpts.Output, outputFlagName, "o", "", "Write to a specified file (default: stdout, which must be redirected)")
_ = cmd.RegisterFlagCompletionFunc(outputFlagName, completion.AutocompleteDefault)
}
func init() {
registry.Commands = append(registry.Commands, registry.CliCommand{
Mode: []entities.EngineMode{entities.ABIMode, entities.TunnelMode},
Command: exportCommand,
})
exportFlags(exportCommand)
registry.Commands = append(registry.Commands, registry.CliCommand{
Mode: []entities.EngineMode{entities.ABIMode, entities.TunnelMode},
Command: containerExportCommand,
Parent: containerCmd,
})
exportFlags(containerExportCommand)
}
func export(cmd *cobra.Command, args []string) error {
if len(exportOpts.Output) == 0 {
file := os.Stdout
if terminal.IsTerminal(int(file.Fd())) {
return errors.Errorf("refusing to export to terminal. Use -o flag or redirect")
}
exportOpts.Output = "/dev/stdout"
} else if err := parse.ValidateFileName(exportOpts.Output); err != nil {
return err
}
return registry.ContainerEngine().ContainerExport(context.Background(), args[0], exportOpts)
}