72 lines
1.9 KiB
Go
72 lines
1.9 KiB
Go
package volumes
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import (
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"context"
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"errors"
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"fmt"
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"os"
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"github.com/containers/common/pkg/completion"
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"github.com/containers/podman/v5/cmd/podman/common"
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"github.com/containers/podman/v5/cmd/podman/registry"
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"github.com/containers/podman/v5/pkg/domain/entities"
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"github.com/spf13/cobra"
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"golang.org/x/term"
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)
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var (
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volumeExportDescription = `
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podman volume export
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Allow content of volume to be exported into external tar.`
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exportCommand = &cobra.Command{
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Use: "export [options] VOLUME",
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Short: "Export volumes",
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Args: cobra.ExactArgs(1),
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Long: volumeExportDescription,
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RunE: export,
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ValidArgsFunction: common.AutocompleteVolumes,
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}
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)
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var (
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targetPath string
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)
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func init() {
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registry.Commands = append(registry.Commands, registry.CliCommand{
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Command: exportCommand,
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Parent: volumeCmd,
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})
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flags := exportCommand.Flags()
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outputFlagName := "output"
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flags.StringVarP(&targetPath, outputFlagName, "o", "", "Write to a specified file (default: stdout, which must be redirected)")
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_ = exportCommand.RegisterFlagCompletionFunc(outputFlagName, completion.AutocompleteDefault)
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}
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func export(cmd *cobra.Command, args []string) error {
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containerEngine := registry.ContainerEngine()
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ctx := context.Background()
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exportOpts := entities.VolumeExportOptions{}
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if targetPath != "" {
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targetFile, err := os.Create(targetPath)
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if err != nil {
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return fmt.Errorf("unable to create target file path %q: %w", targetPath, err)
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}
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defer targetFile.Close()
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exportOpts.Output = targetFile
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} else {
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if cmd.Flag("output").Changed {
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return errors.New("must provide valid path for file to write to")
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}
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if term.IsTerminal(int(os.Stdout.Fd())) {
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return errors.New("cannot write to terminal, use command-line redirection or the --output flag")
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}
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exportOpts.Output = os.Stdout
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}
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return containerEngine.VolumeExport(ctx, args[0], exportOpts)
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}
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