github.com/alibaba/sealer@v0.8.6-0.20220430115802-37a2bdaa8173/sealer/cmd/merge.go (about)

     1  // Copyright © 2021 Alibaba Group Holding Ltd.
     2  //
     3  // Licensed under the Apache License, Version 2.0 (the "License");
     4  // you may not use this file except in compliance with the License.
     5  // You may obtain a copy of the License at
     6  //
     7  //     http://www.apache.org/licenses/LICENSE-2.0
     8  //
     9  // Unless required by applicable law or agreed to in writing, software
    10  // distributed under the License is distributed on an "AS IS" BASIS,
    11  // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    12  // See the License for the specific language governing permissions and
    13  // limitations under the License.
    14  
    15  package cmd
    16  
    17  import (
    18  	"fmt"
    19  	"strings"
    20  
    21  	"github.com/alibaba/sealer/utils/platform"
    22  
    23  	"github.com/alibaba/sealer/pkg/image"
    24  
    25  	"github.com/spf13/cobra"
    26  
    27  	"github.com/alibaba/sealer/logger"
    28  )
    29  
    30  type mergeFlag struct {
    31  	ImageName string
    32  	Platform  string
    33  }
    34  
    35  var mf *mergeFlag
    36  
    37  func getMergeCmd() *cobra.Command {
    38  	var mergeCmd = &cobra.Command{
    39  		Use:   "merge",
    40  		Short: "merge multiple images into one",
    41  		Long:  `sealer merge image1:latest image2:latest image3:latest ......`,
    42  		Example: `
    43  merge images:
    44  	sealer merge kubernetes:v1.19.9 mysql:5.7.0 redis:6.0.0 -t new:0.1.0
    45  `,
    46  		Args: cobra.MinimumNArgs(1),
    47  		RunE: getMergeFunc,
    48  	}
    49  	mf = &mergeFlag{}
    50  	mergeCmd.Flags().StringVarP(&mf.ImageName, "target-image", "t", "", "target image name")
    51  	mergeCmd.Flags().StringVar(&mf.Platform, "platform", "", "set cloud image platform,if not set,keep same platform with runtime")
    52  
    53  	if err := mergeCmd.MarkFlagRequired("target-image"); err != nil {
    54  		logger.Error("failed to init flag target image: %v", err)
    55  	}
    56  	return mergeCmd
    57  }
    58  
    59  func getMergeFunc(cmd *cobra.Command, args []string) error {
    60  	var images []string
    61  	for _, v := range args {
    62  		imageName := strings.TrimSpace(v)
    63  		if imageName == "" {
    64  			continue
    65  		}
    66  		images = append(images, imageName)
    67  	}
    68  	targetPlatform, err := platform.GetPlatform(mf.Platform)
    69  	if err != nil {
    70  		return err
    71  	}
    72  
    73  	if len(targetPlatform) != 1 {
    74  		return fmt.Errorf("merge action only do the same plaform at a time")
    75  	}
    76  
    77  	ima := buildRaw(mf.ImageName)
    78  	if err := image.Merge(ima, images, targetPlatform[0]); err != nil {
    79  		return err
    80  	}
    81  	logger.Info("images %s is merged to %s", strings.Join(images, ","), ima)
    82  	return nil
    83  }
    84  
    85  func buildRaw(name string) string {
    86  	defaultTag := "latest"
    87  	i := strings.LastIndexByte(name, ':')
    88  	if i == -1 {
    89  		return name + ":" + defaultTag
    90  	}
    91  	if i > strings.LastIndexByte(name, '/') {
    92  		return name
    93  	}
    94  	return name + ":" + defaultTag
    95  }
    96  
    97  func init() {
    98  	rootCmd.AddCommand(getMergeCmd())
    99  }