pulumi/pkg/util/contract/failfast.go
2017-05-18 14:51:52 -07:00

38 lines
1.3 KiB
Go

// Licensed to Pulumi Corporation ("Pulumi") under one or more
// contributor license agreements. See the NOTICE file distributed with
// this work for additional information regarding copyright ownership.
// Pulumi licenses this file to You under the Apache License, Version 2.0
// (the "License"); you may not use this file except in compliance with
// the License. You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package contract
import (
"flag"
"fmt"
"os"
"runtime/debug"
"github.com/golang/glog"
)
// failfast logs and panics the process in a way that is friendly to debugging.
func failfast(msg string) {
v := flag.Lookup("logtostderr").Value
if g, isgettable := v.(flag.Getter); isgettable {
if enabled := g.Get().(bool); enabled {
// Print the stack to stderr anytime glog verbose logging is enabled, since glog won't.
fmt.Fprintf(os.Stderr, "fatal: %v\n", msg)
debug.PrintStack()
}
}
glog.Fatal(msg)
}