39 lines
1.2 KiB
Go
39 lines
1.2 KiB
Go
// Copyright 2016-2017, Pulumi Corporation
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//
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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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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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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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package contract
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import (
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"flag"
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"fmt"
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"os"
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"runtime/debug"
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"github.com/golang/glog"
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)
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// failfast logs and panics the process in a way that is friendly to debugging.
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func failfast(msg string) {
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v := flag.Lookup("logtostderr").Value
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if g, isgettable := v.(flag.Getter); isgettable {
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if enabled := g.Get().(bool); enabled {
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// Print the stack to stderr anytime glog verbose logging is enabled, since glog won't.
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if _, err := fmt.Fprintf(os.Stderr, "fatal: %v\n", msg); err != nil {
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glog.Infof("Printing fatal error failed with error: %v", err)
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}
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debug.PrintStack()
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}
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}
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glog.Fatal(msg)
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}
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