github.com/containerd/nerdctl@v1.7.7/pkg/composer/container.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 composer
    18  
    19  import (
    20  	"context"
    21  	"fmt"
    22  
    23  	"github.com/containerd/containerd"
    24  	"github.com/containerd/log"
    25  	"github.com/containerd/nerdctl/pkg/labels"
    26  )
    27  
    28  func (c *Composer) Containers(ctx context.Context, services ...string) ([]containerd.Container, error) {
    29  	projectLabel := fmt.Sprintf("labels.%q==%s", labels.ComposeProject, c.project.Name)
    30  	filters := []string{}
    31  	for _, service := range services {
    32  		filters = append(filters, fmt.Sprintf("%s,labels.%q==%s", projectLabel, labels.ComposeService, service))
    33  	}
    34  	if len(services) == 0 {
    35  		filters = append(filters, projectLabel)
    36  	}
    37  	log.G(ctx).Debugf("filters: %v", filters)
    38  	containers, err := c.client.Containers(ctx, filters...)
    39  	if err != nil {
    40  		return nil, err
    41  	}
    42  	return containers, nil
    43  }
    44  
    45  func (c *Composer) containerExists(ctx context.Context, name, service string) (bool, error) {
    46  	// get list of containers for service
    47  	containers, err := c.Containers(ctx, service)
    48  	if err != nil {
    49  		return false, err
    50  	}
    51  
    52  	for _, container := range containers {
    53  		containerLabels, err := container.Labels(ctx)
    54  		if err != nil {
    55  			return false, err
    56  		}
    57  		if name == containerLabels[labels.Name] {
    58  			// container exists
    59  			return true, nil
    60  		}
    61  	}
    62  	// container doesn't exist
    63  	return false, nil
    64  }