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https://github.com/weaveworks/scope.git
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99204e1ff7
* Remove individually vendored k8s.io/kubernetes/pkg/<foo> * Vendor the whole of vendor/k8s.io/kubernetes/pkg * Add k8s pod log control * Tag pods with host id and include them in the host topology as children. * adding a basic test for kubernetes.Reporter.GetLogs
79 lines
1.5 KiB
Go
79 lines
1.5 KiB
Go
/*
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Copyright 2016 The Kubernetes Authors All rights reserved.
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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 interrupt
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import (
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"os"
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"os/signal"
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"sync"
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)
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type Handler struct {
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notify []func()
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final func(os.Signal)
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once sync.Once
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}
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func Chain(handler *Handler, notify ...func()) *Handler {
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if handler == nil {
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return New(nil, notify...)
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}
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return New(handler.Signal, append(notify, handler.Close)...)
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}
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func New(final func(os.Signal), notify ...func()) *Handler {
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return &Handler{
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final: final,
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notify: notify,
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}
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}
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func (h *Handler) Close() {
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h.once.Do(func() {
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for _, fn := range h.notify {
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fn()
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}
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})
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}
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func (h *Handler) Signal(s os.Signal) {
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h.once.Do(func() {
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for _, fn := range h.notify {
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fn()
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}
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if h.final == nil {
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os.Exit(0)
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}
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h.final(s)
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})
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}
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func (h *Handler) Run(fn func() error) error {
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ch := make(chan os.Signal, 1)
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signal.Notify(ch, childSignals...)
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defer signal.Stop(ch)
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go func() {
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sig, ok := <-ch
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if !ok {
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return
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}
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h.Signal(sig)
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}()
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defer h.Close()
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return fn()
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}
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