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package images
import (
"bufio"
"fmt"
"os"
"strings"
"github.com/containers/common/pkg/completion"
"github.com/containers/podman/v3/cmd/podman/common"
"github.com/containers/podman/v3/cmd/podman/registry"
"github.com/containers/podman/v3/cmd/podman/utils"
"github.com/containers/podman/v3/cmd/podman/validate"
"github.com/containers/podman/v3/pkg/domain/entities"
"github.com/containers/podman/v3/pkg/specgenutil"
"github.com/spf13/cobra"
)
var (
pruneDescription = `Removes dangling or unused images from local storage.`
pruneCmd = &cobra.Command{
Use: "prune [options]",
Args: validate.NoArgs,
Short: "Remove unused images",
Long: pruneDescription,
RunE: prune,
ValidArgsFunction: completion.AutocompleteNone,
Example: `podman image prune`,
}
pruneOpts = entities.ImagePruneOptions{}
force bool
filter = []string{}
)
func init() {
registry.Commands = append(registry.Commands, registry.CliCommand{
Command: pruneCmd,
Parent: imageCmd,
})
flags := pruneCmd.Flags()
flags.BoolVarP(&pruneOpts.All, "all", "a", false, "Remove all images not in use by containers, not just dangling ones")
flags.BoolVarP(&pruneOpts.External, "external", "", false, "Remove images even when they are used by external containers (e.g., by build containers)")
flags.BoolVarP(&force, "force", "f", false, "Do not prompt for confirmation")
filterFlagName := "filter"
flags.StringArrayVar(&filter, filterFlagName, []string{}, "Provide filter values (e.g. 'label=<key>=<value>')")
_ = pruneCmd.RegisterFlagCompletionFunc(filterFlagName, common.AutocompletePruneFilters)
}
func prune(cmd *cobra.Command, args []string) error {
if !force {
reader := bufio.NewReader(os.Stdin)
fmt.Printf("%s", createPruneWarningMessage(pruneOpts))
answer, err := reader.ReadString('\n')
if err != nil {
return err
}
if strings.ToLower(answer)[0] != 'y' {
return nil
}
}
filterMap, err := specgenutil.ParseFilters(filter)
if err != nil {
return err
}
for k, v := range filterMap {
for _, val := range v {
pruneOpts.Filter = append(pruneOpts.Filter, fmt.Sprintf("%s=%s", k, val))
}
}
results, err := registry.ImageEngine().Prune(registry.GetContext(), pruneOpts)
if err != nil {
return err
}
return utils.PrintImagePruneResults(results, false)
}
func createPruneWarningMessage(pruneOpts entities.ImagePruneOptions) string {
question := "Are you sure you want to continue? [y/N] "
if pruneOpts.All {
return "WARNING! This command removes all images without at least one container associated with them.\n" + question
}
return "WARNING! This command removes all dangling images.\n" + question
}
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