147 lines
3.5 KiB
Go
147 lines
3.5 KiB
Go
package images
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import (
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"fmt"
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"os"
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"text/tabwriter"
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"text/template"
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"github.com/containers/common/pkg/report"
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"github.com/containers/podman/v2/cmd/podman/common"
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"github.com/containers/podman/v2/cmd/podman/registry"
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"github.com/containers/podman/v2/cmd/podman/utils"
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"github.com/containers/podman/v2/pkg/domain/entities"
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"github.com/pkg/errors"
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"github.com/spf13/cobra"
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)
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var (
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mountDescription = `podman image mount
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Lists all mounted images mount points if no images is specified
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podman image mount IMAGE-NAME-OR-ID
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Mounts the specified image and prints the mountpoint
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`
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mountCommand = &cobra.Command{
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Use: "mount [options] [IMAGE...]",
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Short: "Mount an image's root filesystem",
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Long: mountDescription,
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RunE: mount,
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ValidArgsFunction: common.AutocompleteImages,
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Example: `podman image mount imgID
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podman image mount imgID1 imgID2 imgID3
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podman image mount
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podman image mount --all`,
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Annotations: map[string]string{
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registry.UnshareNSRequired: "",
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registry.ParentNSRequired: "",
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},
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}
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)
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var (
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mountOpts entities.ImageMountOptions
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)
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func mountFlags(cmd *cobra.Command) {
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flags := cmd.Flags()
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flags.BoolVarP(&mountOpts.All, "all", "a", false, "Mount all images")
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formatFlagName := "format"
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flags.StringVar(&mountOpts.Format, formatFlagName, "", "Print the mounted images in specified format (json)")
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_ = cmd.RegisterFlagCompletionFunc(formatFlagName, common.AutocompleteJSONFormat)
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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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Mode: []entities.EngineMode{entities.ABIMode},
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Command: mountCommand,
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Parent: imageCmd,
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})
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mountFlags(mountCommand)
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}
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func mount(cmd *cobra.Command, args []string) error {
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if len(args) > 0 && mountOpts.All {
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return errors.New("when using the --all switch, you may not pass any image names or IDs")
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}
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reports, err := registry.ImageEngine().Mount(registry.GetContext(), args, mountOpts)
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if err != nil {
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return err
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}
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if len(args) > 0 || mountOpts.All {
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var errs utils.OutputErrors
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for _, r := range reports {
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if r.Err == nil {
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fmt.Println(r.Path)
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continue
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}
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errs = append(errs, r.Err)
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}
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return errs.PrintErrors()
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}
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switch {
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case report.IsJSON(mountOpts.Format):
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return printJSON(reports)
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case mountOpts.Format == "":
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break // default format
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default:
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return errors.Errorf("unknown --format argument: %q", mountOpts.Format)
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}
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mrs := make([]mountReporter, 0, len(reports))
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for _, r := range reports {
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mrs = append(mrs, mountReporter{r})
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}
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row := "{{range . }}{{.ID}}\t{{.Path}}\n{{end}}"
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tmpl, err := template.New("mounts").Parse(row)
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if err != nil {
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return err
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}
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w := tabwriter.NewWriter(os.Stdout, 8, 2, 2, ' ', 0)
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defer w.Flush()
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return tmpl.Execute(w, mrs)
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}
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func printJSON(reports []*entities.ImageMountReport) error {
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type jreport struct {
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ID string `json:"id"`
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Names []string
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Repositories []string
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Mountpoint string `json:"mountpoint"`
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}
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jreports := make([]jreport, 0, len(reports))
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for _, r := range reports {
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jreports = append(jreports, jreport{
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ID: r.Id,
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Names: []string{r.Name},
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Repositories: r.Repositories,
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Mountpoint: r.Path,
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})
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}
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b, err := json.MarshalIndent(jreports, "", " ")
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if err != nil {
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return err
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}
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fmt.Println(string(b))
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return nil
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}
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type mountReporter struct {
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*entities.ImageMountReport
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}
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func (m mountReporter) ID() string {
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if len(m.Repositories) > 0 {
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return m.Repositories[0]
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}
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return m.Id
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}
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