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* Output to stdout or stderr in each case. * Use logrus wrapper for plugin logging * Parser friendly output
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Victor Castell
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Jan 16, 2019
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,127 @@ | ||
| package dkron | ||
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| import ( | ||
| "bytes" | ||
| golog "log" | ||
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| "github.com/hashicorp/go-hclog" | ||
| "github.com/sirupsen/logrus" | ||
| ) | ||
|
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| // HCLogAdapter implements the hclog interface, and wraps it | ||
| // around a Logrus entry | ||
| type HCLogAdapter struct { | ||
| Log logrus.FieldLogger | ||
| Name string | ||
| } | ||
|
|
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| // HCLog has one more level than we do. As such, we will never | ||
| // set trace level. | ||
| func (*HCLogAdapter) Trace(_ string, _ ...interface{}) { | ||
| return | ||
| } | ||
|
|
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| func (a *HCLogAdapter) Debug(msg string, args ...interface{}) { | ||
| a.CreateEntry(args).Debug(msg) | ||
| } | ||
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| func (a *HCLogAdapter) Info(msg string, args ...interface{}) { | ||
| a.CreateEntry(args).Info(msg) | ||
| } | ||
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| func (a *HCLogAdapter) Warn(msg string, args ...interface{}) { | ||
| a.CreateEntry(args).Warn(msg) | ||
| } | ||
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| func (a *HCLogAdapter) Error(msg string, args ...interface{}) { | ||
| a.CreateEntry(args).Error(msg) | ||
| } | ||
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| func (a *HCLogAdapter) IsTrace() bool { | ||
| return false | ||
| } | ||
|
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| func (a *HCLogAdapter) IsDebug() bool { | ||
| return a.shouldEmit(logrus.DebugLevel) | ||
| } | ||
|
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| func (a *HCLogAdapter) IsInfo() bool { | ||
| return a.shouldEmit(logrus.InfoLevel) | ||
| } | ||
|
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| func (a *HCLogAdapter) IsWarn() bool { | ||
| return a.shouldEmit(logrus.WarnLevel) | ||
| } | ||
|
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| func (a *HCLogAdapter) IsError() bool { | ||
| return a.shouldEmit(logrus.ErrorLevel) | ||
| } | ||
|
|
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| func (a *HCLogAdapter) SetLevel(hclog.Level) { | ||
| // interface definition says it is ok for this to be a noop if | ||
| // implementations don't need/want to support dynamic level changing, which | ||
| // we don't currently. | ||
| } | ||
|
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| func (a *HCLogAdapter) With(args ...interface{}) hclog.Logger { | ||
| e := a.CreateEntry(args) | ||
| return &HCLogAdapter{Log: e} | ||
| } | ||
|
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| func (a *HCLogAdapter) Named(name string) hclog.Logger { | ||
| var newName bytes.Buffer | ||
| if a.Name != "" { | ||
| newName.WriteString(a.Name) | ||
| newName.WriteString(".") | ||
| } | ||
| newName.WriteString(name) | ||
|
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| return a.ResetNamed(newName.String()) | ||
| } | ||
|
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| func (a *HCLogAdapter) ResetNamed(name string) hclog.Logger { | ||
| fields := []interface{}{"subsystem_name", name} | ||
| e := a.CreateEntry(fields) | ||
| return &HCLogAdapter{Log: e, Name: name} | ||
| } | ||
|
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| // StandardLogger is meant to return a stldib Logger type which wraps around | ||
| // hclog. It does this by providing an io.Writer and instantiating a new | ||
| // Logger. It then tries to interpret the log level by parsing the message. | ||
| // | ||
| // Since we are not using `hclog` in a generic way, and I cannot find any | ||
| // calls to this method from go-plugin, we will poorly support this method. | ||
| // Rather than pull in all of hclog writer parsing logic, pass it a Logrus | ||
| // writer, and hardcode the level to INFO. | ||
| // | ||
| // Apologies to those who find themselves here. | ||
| func (a *HCLogAdapter) StandardLogger(opts *hclog.StandardLoggerOptions) *golog.Logger { | ||
| entry := a.Log.WithFields(logrus.Fields{}) | ||
| return golog.New(entry.WriterLevel(logrus.InfoLevel), "", 0) | ||
| } | ||
|
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| func (a *HCLogAdapter) shouldEmit(level logrus.Level) bool { | ||
| currentLevel := a.Log.WithFields(logrus.Fields{}).Level | ||
| if currentLevel >= level { | ||
| return true | ||
| } | ||
|
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| return false | ||
| } | ||
|
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| func (a *HCLogAdapter) CreateEntry(args []interface{}) *logrus.Entry { | ||
| if len(args)%2 != 0 { | ||
| args = append(args, "<unknown>") | ||
| } | ||
|
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| fields := make(logrus.Fields) | ||
| for i := 0; i < len(args); i = i + 2 { | ||
| k, ok := args[i].(string) | ||
| if !ok { | ||
| } | ||
| v := args[i+1] | ||
| fields[k] = v | ||
| } | ||
|
|
||
| return a.Log.WithFields(fields) | ||
| } |
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