github.com/containerd/nerdctl@v1.7.7/cmd/nerdctl/login.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  	"errors"
    21  	"io"
    22  	"strings"
    23  
    24  	"github.com/containerd/log"
    25  	"github.com/containerd/nerdctl/pkg/api/types"
    26  	"github.com/containerd/nerdctl/pkg/cmd/login"
    27  
    28  	"github.com/spf13/cobra"
    29  )
    30  
    31  type loginOptions struct {
    32  	serverAddress string
    33  	username      string
    34  	password      string
    35  	passwordStdin bool
    36  }
    37  
    38  var options = new(loginOptions)
    39  
    40  func newLoginCommand() *cobra.Command {
    41  	var loginCommand = &cobra.Command{
    42  		Use:           "login [flags] [SERVER]",
    43  		Args:          cobra.MaximumNArgs(1),
    44  		Short:         "Log in to a container registry",
    45  		RunE:          loginAction,
    46  		SilenceUsage:  true,
    47  		SilenceErrors: true,
    48  	}
    49  	loginCommand.Flags().StringVarP(&options.username, "username", "u", "", "Username")
    50  	loginCommand.Flags().StringVarP(&options.password, "password", "p", "", "Password")
    51  	loginCommand.Flags().BoolVar(&options.passwordStdin, "password-stdin", false, "Take the password from stdin")
    52  	return loginCommand
    53  }
    54  
    55  func loginAction(cmd *cobra.Command, args []string) error {
    56  	if len(args) == 1 {
    57  		options.serverAddress = args[0]
    58  	}
    59  	if err := verifyLoginOptions(cmd, options); err != nil {
    60  		return err
    61  	}
    62  
    63  	globalOptions, err := processRootCmdFlags(cmd)
    64  	if err != nil {
    65  		return err
    66  	}
    67  
    68  	return login.Login(cmd.Context(), types.LoginCommandOptions{
    69  		GOptions:      globalOptions,
    70  		ServerAddress: options.serverAddress,
    71  		Username:      options.username,
    72  		Password:      options.password,
    73  	}, cmd.OutOrStdout())
    74  }
    75  
    76  // copied from github.com/docker/cli/cli/command/registry/login.go (v20.10.3)
    77  func verifyLoginOptions(cmd *cobra.Command, options *loginOptions) error {
    78  	if options.password != "" {
    79  		log.L.Warn("WARNING! Using --password via the CLI is insecure. Use --password-stdin.")
    80  		if options.passwordStdin {
    81  			return errors.New("--password and --password-stdin are mutually exclusive")
    82  		}
    83  	}
    84  
    85  	if options.passwordStdin {
    86  		if options.username == "" {
    87  			return errors.New("must provide --username with --password-stdin")
    88  		}
    89  
    90  		contents, err := io.ReadAll(cmd.InOrStdin())
    91  		if err != nil {
    92  			return err
    93  		}
    94  
    95  		options.password = strings.TrimSuffix(string(contents), "\n")
    96  		options.password = strings.TrimSuffix(options.password, "\r")
    97  	}
    98  	return nil
    99  }