119 lines
3.2 KiB
Go
119 lines
3.2 KiB
Go
package system
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import (
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"context"
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"fmt"
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"os"
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"github.com/containers/common/pkg/completion"
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"github.com/containers/common/pkg/report"
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"github.com/containers/podman/v3/cmd/podman/common"
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"github.com/containers/podman/v3/cmd/podman/registry"
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"github.com/containers/podman/v3/cmd/podman/validate"
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"github.com/containers/podman/v3/libpod/events"
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"github.com/containers/podman/v3/pkg/domain/entities"
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"github.com/spf13/cobra"
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)
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var (
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eventsDescription = `Monitor podman events.
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By default, streaming mode is used, printing new events as they occur. Previous events can be listed via --since and --until.`
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eventsCommand = &cobra.Command{
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Use: "events [options]",
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Args: validate.NoArgs,
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Short: "Show podman events",
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Long: eventsDescription,
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RunE: eventsCmd,
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ValidArgsFunction: completion.AutocompleteNone,
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Example: `podman events
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podman events --filter event=create
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podman events --format {{.Image}}
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podman events --since 1h30s`,
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}
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)
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var (
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eventOptions entities.EventsOptions
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eventFormat string
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)
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func init() {
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registry.Commands = append(registry.Commands, registry.CliCommand{
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Command: eventsCommand,
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})
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flags := eventsCommand.Flags()
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filterFlagName := "filter"
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flags.StringArrayVar(&eventOptions.Filter, filterFlagName, []string{}, "filter output")
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_ = eventsCommand.RegisterFlagCompletionFunc(filterFlagName, common.AutocompleteEventFilter)
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formatFlagName := "format"
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flags.StringVar(&eventFormat, formatFlagName, "", "format the output using a Go template")
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_ = eventsCommand.RegisterFlagCompletionFunc(formatFlagName, common.AutocompleteFormat(events.Event{}))
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flags.BoolVar(&eventOptions.Stream, "stream", true, "stream new events; for testing only")
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sinceFlagName := "since"
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flags.StringVar(&eventOptions.Since, sinceFlagName, "", "show all events created since timestamp")
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_ = eventsCommand.RegisterFlagCompletionFunc(sinceFlagName, completion.AutocompleteNone)
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untilFlagName := "until"
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flags.StringVar(&eventOptions.Until, untilFlagName, "", "show all events until timestamp")
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_ = eventsCommand.RegisterFlagCompletionFunc(untilFlagName, completion.AutocompleteNone)
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_ = flags.MarkHidden("stream")
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}
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func eventsCmd(cmd *cobra.Command, _ []string) error {
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if len(eventOptions.Since) > 0 || len(eventOptions.Until) > 0 {
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eventOptions.FromStart = true
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}
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eventChannel := make(chan *events.Event, 1)
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eventOptions.EventChan = eventChannel
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errChannel := make(chan error)
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var (
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tmpl *report.Template
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doJSON bool
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)
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if cmd.Flags().Changed("format") {
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doJSON = report.IsJSON(eventFormat)
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if !doJSON {
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var err error
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tmpl, err = report.NewTemplate("events").Parse(eventFormat)
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if err != nil {
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return err
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}
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}
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}
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go func() {
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err := registry.ContainerEngine().Events(context.Background(), eventOptions)
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errChannel <- err
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}()
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for event := range eventChannel {
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switch {
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case event == nil:
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// no-op
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case doJSON:
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jsonStr, err := event.ToJSONString()
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if err != nil {
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return err
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}
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fmt.Println(jsonStr)
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case cmd.Flags().Changed("format"):
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if err := tmpl.Execute(os.Stdout, event); err != nil {
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return err
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}
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fmt.Println("")
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default:
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fmt.Println(event.ToHumanReadable())
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}
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}
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return <-errChannel
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}
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