110 lines
2.6 KiB
Go
110 lines
2.6 KiB
Go
/*
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Copyright 2020 Docker Compose CLI authors
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package compose
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import (
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"fmt"
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"github.com/sirupsen/logrus"
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)
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// LogPrinter watch application containers an collect their logs
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type LogPrinter interface {
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HandleEvent(event ContainerEvent)
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Run(cascadeStop bool, exitCodeFrom string, stopFn func() error) (int, error)
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Cancel()
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}
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// NewLogPrinter builds a LogPrinter passing containers logs to LogConsumer
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func NewLogPrinter(consumer LogConsumer) LogPrinter {
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queue := make(chan ContainerEvent)
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printer := printer{
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consumer: consumer,
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queue: queue,
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}
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return &printer
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}
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func (p *printer) Cancel() {
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p.queue <- ContainerEvent{
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Type: UserCancel,
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}
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}
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type printer struct {
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queue chan ContainerEvent
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consumer LogConsumer
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}
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func (p *printer) HandleEvent(event ContainerEvent) {
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p.queue <- event
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}
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func (p *printer) Run(cascadeStop bool, exitCodeFrom string, stopFn func() error) (int, error) {
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var (
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aborting bool
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exitCode int
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)
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containers := map[string]struct{}{}
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for {
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event := <-p.queue
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container := event.Container
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switch event.Type {
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case UserCancel:
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aborting = true
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case ContainerEventAttach:
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if _, ok := containers[container]; ok {
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continue
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}
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containers[container] = struct{}{}
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p.consumer.Register(container)
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case ContainerEventExit:
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if !event.Restarting {
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delete(containers, container)
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}
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if !aborting {
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p.consumer.Status(container, fmt.Sprintf("exited with code %d", event.ExitCode))
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}
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if cascadeStop {
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if !aborting {
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aborting = true
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fmt.Println("Aborting on container exit...")
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err := stopFn()
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if err != nil {
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return 0, err
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}
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}
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if exitCodeFrom == "" {
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exitCodeFrom = event.Service
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}
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if exitCodeFrom == event.Service {
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logrus.Error(event.ExitCode)
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exitCode = event.ExitCode
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}
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}
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if len(containers) == 0 {
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// Last container terminated, done
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return exitCode, nil
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}
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case ContainerEventLog:
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if !aborting {
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p.consumer.Log(container, event.Service, event.Line)
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}
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}
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}
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}
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