github.com/containerd/nerdctl@v1.7.7/cmd/nerdctl/container_prune.go (about)

     1  /*
     2     Copyright The containerd Authors.
     3  
     4     Licensed under the Apache License, Version 2.0 (the "License");
     5     you may not use this file except in compliance with the License.
     6     You may obtain a copy of the License at
     7  
     8         http://www.apache.org/licenses/LICENSE-2.0
     9  
    10     Unless required by applicable law or agreed to in writing, software
    11     distributed under the License is distributed on an "AS IS" BASIS,
    12     WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    13     See the License for the specific language governing permissions and
    14     limitations under the License.
    15  */
    16  
    17  package main
    18  
    19  import (
    20  	"fmt"
    21  	"strings"
    22  
    23  	"github.com/containerd/nerdctl/pkg/api/types"
    24  	"github.com/containerd/nerdctl/pkg/clientutil"
    25  	"github.com/containerd/nerdctl/pkg/cmd/container"
    26  	"github.com/spf13/cobra"
    27  )
    28  
    29  func newContainerPruneCommand() *cobra.Command {
    30  	containerPruneCommand := &cobra.Command{
    31  		Use:           "prune [flags]",
    32  		Short:         "Remove all stopped containers",
    33  		Args:          cobra.NoArgs,
    34  		RunE:          containerPruneAction,
    35  		SilenceUsage:  true,
    36  		SilenceErrors: true,
    37  	}
    38  	containerPruneCommand.Flags().BoolP("force", "f", false, "Do not prompt for confirmation")
    39  	return containerPruneCommand
    40  }
    41  
    42  func processContainerPruneOptions(cmd *cobra.Command) (types.ContainerPruneOptions, error) {
    43  	globalOptions, err := processRootCmdFlags(cmd)
    44  	if err != nil {
    45  		return types.ContainerPruneOptions{}, err
    46  	}
    47  
    48  	return types.ContainerPruneOptions{
    49  		GOptions: globalOptions,
    50  		Stdout:   cmd.OutOrStdout(),
    51  	}, nil
    52  }
    53  
    54  func grantPrunePermission(cmd *cobra.Command) (bool, error) {
    55  	force, err := cmd.Flags().GetBool("force")
    56  	if err != nil {
    57  		return false, err
    58  	}
    59  
    60  	if !force {
    61  		var confirm string
    62  		msg := "This will remove all stopped containers."
    63  		msg += "\nAre you sure you want to continue? [y/N] "
    64  		fmt.Fprintf(cmd.OutOrStdout(), "WARNING! %s", msg)
    65  		fmt.Fscanf(cmd.InOrStdin(), "%s", &confirm)
    66  
    67  		if strings.ToLower(confirm) != "y" {
    68  			return false, nil
    69  		}
    70  	}
    71  	return true, nil
    72  }
    73  
    74  func containerPruneAction(cmd *cobra.Command, _ []string) error {
    75  	options, err := processContainerPruneOptions(cmd)
    76  	if err != nil {
    77  		return err
    78  	}
    79  
    80  	if ok, err := grantPrunePermission(cmd); err != nil {
    81  		return err
    82  	} else if !ok {
    83  		return nil
    84  	}
    85  
    86  	client, ctx, cancel, err := clientutil.NewClient(cmd.Context(), options.GOptions.Namespace, options.GOptions.Address)
    87  	if err != nil {
    88  		return err
    89  	}
    90  	defer cancel()
    91  
    92  	return container.Prune(ctx, client, options)
    93  }