knative.dev/pkg@v0.0.0-20260602142205-ac97e43f6622/test/cleanup.go (about)

     1  /*
     2  Copyright 2018 The Knative 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 test
    18  
    19  import (
    20  	"os"
    21  	"os/signal"
    22  	"sync"
    23  )
    24  
    25  type logFunc func(template string, args ...interface{})
    26  
    27  var cleanup struct {
    28  	once  sync.Once
    29  	mutex sync.RWMutex
    30  	funcs []func()
    31  }
    32  
    33  func waitForInterrupt() {
    34  	c := make(chan os.Signal, 1)
    35  	signal.Notify(c, os.Interrupt)
    36  
    37  	go func() {
    38  		<-c
    39  
    40  		cleanup.mutex.RLock()
    41  		defer cleanup.mutex.RUnlock()
    42  
    43  		for i := len(cleanup.funcs) - 1; i >= 0; i-- {
    44  			cleanup.funcs[i]()
    45  		}
    46  
    47  		os.Exit(1)
    48  	}()
    49  }
    50  
    51  // CleanupOnInterrupt will execute the function if an interrupt signal is caught
    52  // Deprecated - use OnInterrupt
    53  func CleanupOnInterrupt(f func(), log logFunc) {
    54  	OnInterrupt(f)
    55  }
    56  
    57  // OnInterrupt registers a cleanup function to run if an interrupt signal is caught
    58  func OnInterrupt(cleanupFunc func()) {
    59  	cleanup.once.Do(waitForInterrupt)
    60  
    61  	cleanup.mutex.Lock()
    62  	defer cleanup.mutex.Unlock()
    63  
    64  	cleanup.funcs = append(cleanup.funcs, cleanupFunc)
    65  }