github.com/containerd/nerdctl/v2@v2.0.0-beta.5.0.20240520001846-b5758f54fa28/pkg/cmd/image/inspect.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  	"time"
    23  
    24  	"github.com/containerd/containerd"
    25  	"github.com/containerd/log"
    26  	"github.com/containerd/nerdctl/v2/pkg/api/types"
    27  	"github.com/containerd/nerdctl/v2/pkg/formatter"
    28  	"github.com/containerd/nerdctl/v2/pkg/idutil/imagewalker"
    29  	"github.com/containerd/nerdctl/v2/pkg/imageinspector"
    30  	"github.com/containerd/nerdctl/v2/pkg/inspecttypes/dockercompat"
    31  )
    32  
    33  // Inspect prints detailed information of each image in `images`.
    34  func Inspect(ctx context.Context, client *containerd.Client, images []string, options types.ImageInspectOptions) error {
    35  	f := &imageInspector{
    36  		mode: options.Mode,
    37  	}
    38  	walker := &imagewalker.ImageWalker{
    39  		Client: client,
    40  		OnFound: func(ctx context.Context, found imagewalker.Found) error {
    41  			ctx, cancel := context.WithTimeout(ctx, 5*time.Second)
    42  			defer cancel()
    43  
    44  			n, err := imageinspector.Inspect(ctx, client, found.Image, options.GOptions.Snapshotter)
    45  			if err != nil {
    46  				return err
    47  			}
    48  			switch f.mode {
    49  			case "native":
    50  				f.entries = append(f.entries, n)
    51  			case "dockercompat":
    52  				d, err := dockercompat.ImageFromNative(n)
    53  				if err != nil {
    54  					return err
    55  				}
    56  				f.entries = append(f.entries, d)
    57  			default:
    58  				return fmt.Errorf("unknown mode %q", f.mode)
    59  			}
    60  			return nil
    61  		},
    62  	}
    63  
    64  	err := walker.WalkAll(ctx, images, true)
    65  	if len(f.entries) > 0 {
    66  		if formatErr := formatter.FormatSlice(options.Format, options.Stdout, f.entries); formatErr != nil {
    67  			log.G(ctx).Error(formatErr)
    68  		}
    69  	}
    70  	return err
    71  }
    72  
    73  type imageInspector struct {
    74  	mode    string
    75  	entries []interface{}
    76  }