53 lines
1.6 KiB
Go
53 lines
1.6 KiB
Go
package events
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import (
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"github.com/docker/docker/api/types/filters"
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"github.com/docker/docker/pkg/jsonmessage"
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"github.com/docker/docker/reference"
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)
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// Filter can filter out docker events from a stream
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type Filter struct {
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filter filters.Args
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getLabels func(id string) map[string]string
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}
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// NewFilter creates a new Filter
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func NewFilter(filter filters.Args, getLabels func(id string) map[string]string) *Filter {
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return &Filter{filter: filter, getLabels: getLabels}
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}
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// Include returns true when the event ev is included by the filters
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func (ef *Filter) Include(ev *jsonmessage.JSONMessage) bool {
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return ef.filter.ExactMatch("event", ev.Status) &&
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ef.filter.ExactMatch("container", ev.ID) &&
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ef.isImageIncluded(ev.ID, ev.From) &&
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ef.isLabelFieldIncluded(ev.ID)
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}
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func (ef *Filter) isLabelFieldIncluded(id string) bool {
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if !ef.filter.Include("label") {
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return true
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}
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return ef.filter.MatchKVList("label", ef.getLabels(id))
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}
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// The image filter will be matched against both event.ID (for image events)
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// and event.From (for container events), so that any container that was created
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// from an image will be included in the image events. Also compare both
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// against the stripped repo name without any tags.
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func (ef *Filter) isImageIncluded(eventID string, eventFrom string) bool {
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return ef.filter.ExactMatch("image", eventID) ||
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ef.filter.ExactMatch("image", eventFrom) ||
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ef.filter.ExactMatch("image", stripTag(eventID)) ||
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ef.filter.ExactMatch("image", stripTag(eventFrom))
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}
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func stripTag(image string) string {
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ref, err := reference.ParseNamed(image)
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if err != nil {
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return image
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}
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return ref.Name()
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}
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