github.com/containerd/nerdctl/v2@v2.0.0-beta.5.0.20240520001846-b5758f54fa28/pkg/cmd/image/tag.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 image
    18  
    19  import (
    20  	"context"
    21  	"fmt"
    22  
    23  	"github.com/containerd/containerd"
    24  	"github.com/containerd/containerd/errdefs"
    25  	"github.com/containerd/nerdctl/v2/pkg/api/types"
    26  	"github.com/containerd/nerdctl/v2/pkg/idutil/imagewalker"
    27  	"github.com/containerd/nerdctl/v2/pkg/referenceutil"
    28  )
    29  
    30  func Tag(ctx context.Context, client *containerd.Client, options types.ImageTagOptions) error {
    31  	imageService := client.ImageService()
    32  	var srcName string
    33  	imagewalker := &imagewalker.ImageWalker{
    34  		Client: client,
    35  		OnFound: func(ctx context.Context, found imagewalker.Found) error {
    36  			if srcName == "" {
    37  				srcName = found.Image.Name
    38  			}
    39  			return nil
    40  		},
    41  	}
    42  	matchCount, err := imagewalker.Walk(ctx, options.Source)
    43  	if err != nil {
    44  		return err
    45  	}
    46  	if matchCount < 1 {
    47  		return fmt.Errorf("%s: not found", options.Source)
    48  	}
    49  
    50  	target, err := referenceutil.ParseDockerRef(options.Target)
    51  	if err != nil {
    52  		return err
    53  	}
    54  
    55  	ctx, done, err := client.WithLease(ctx)
    56  	if err != nil {
    57  		return err
    58  	}
    59  	defer done(ctx)
    60  
    61  	image, err := imageService.Get(ctx, srcName)
    62  	if err != nil {
    63  		return err
    64  	}
    65  	image.Name = target.String()
    66  	if _, err = imageService.Create(ctx, image); err != nil {
    67  		if errdefs.IsAlreadyExists(err) {
    68  			if err = imageService.Delete(ctx, image.Name); err != nil {
    69  				return err
    70  			}
    71  			if _, err = imageService.Create(ctx, image); err != nil {
    72  				return err
    73  			}
    74  		} else {
    75  			return err
    76  		}
    77  	}
    78  	return nil
    79  }