github.com/containerd/nerdctl@v1.7.7/cmd/nerdctl/system_events.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  	"github.com/containerd/nerdctl/pkg/api/types"
    21  	"github.com/containerd/nerdctl/pkg/clientutil"
    22  	"github.com/containerd/nerdctl/pkg/cmd/system"
    23  	"github.com/spf13/cobra"
    24  )
    25  
    26  func newEventsCommand() *cobra.Command {
    27  	shortHelp := `Get real time events from the server`
    28  	longHelp := shortHelp + "\nNOTE: The output format is not compatible with Docker."
    29  	var eventsCommand = &cobra.Command{
    30  		Use:           "events",
    31  		Args:          cobra.NoArgs,
    32  		Short:         shortHelp,
    33  		Long:          longHelp,
    34  		RunE:          eventsAction,
    35  		SilenceUsage:  true,
    36  		SilenceErrors: true,
    37  	}
    38  	eventsCommand.Flags().String("format", "", "Format the output using the given Go template, e.g, '{{json .}}'")
    39  	eventsCommand.RegisterFlagCompletionFunc("format", func(cmd *cobra.Command, args []string, toComplete string) ([]string, cobra.ShellCompDirective) {
    40  		return []string{"json"}, cobra.ShellCompDirectiveNoFileComp
    41  	})
    42  	eventsCommand.Flags().StringSliceP("filter", "f", []string{}, "Filter matches containers based on given conditions")
    43  	return eventsCommand
    44  }
    45  
    46  func processSystemEventsOptions(cmd *cobra.Command) (types.SystemEventsOptions, error) {
    47  	globalOptions, err := processRootCmdFlags(cmd)
    48  	if err != nil {
    49  		return types.SystemEventsOptions{}, err
    50  	}
    51  	format, err := cmd.Flags().GetString("format")
    52  	if err != nil {
    53  		return types.SystemEventsOptions{}, err
    54  	}
    55  	filters, err := cmd.Flags().GetStringSlice("filter")
    56  	if err != nil {
    57  		return types.SystemEventsOptions{}, err
    58  	}
    59  	return types.SystemEventsOptions{
    60  		Stdout:   cmd.OutOrStdout(),
    61  		GOptions: globalOptions,
    62  		Format:   format,
    63  		Filters:  filters,
    64  	}, nil
    65  }
    66  
    67  func eventsAction(cmd *cobra.Command, args []string) error {
    68  	options, err := processSystemEventsOptions(cmd)
    69  	if err != nil {
    70  		return err
    71  	}
    72  	client, ctx, cancel, err := clientutil.NewClient(cmd.Context(), options.GOptions.Namespace, options.GOptions.Address)
    73  	if err != nil {
    74  		return err
    75  	}
    76  	defer cancel()
    77  	return system.Events(ctx, client, options)
    78  }