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