github.com/banzaicloud/operator-tools@v0.28.10/pkg/utils/log.go (about)

     1  // Copyright © 2020 Banzai Cloud
     2  //
     3  // Licensed under the Apache License, Version 2.0 (the "License");
     4  // you may not use this file except in compliance with the License.
     5  // You may obtain a copy of the License at
     6  //
     7  //    http://www.apache.org/licenses/LICENSE-2.0
     8  //
     9  // Unless required by applicable law or agreed to in writing, software
    10  // distributed under the License is distributed on an "AS IS" BASIS,
    11  // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    12  // See the License for the specific language governing permissions and
    13  // limitations under the License.
    14  
    15  package utils
    16  
    17  import (
    18  	"fmt"
    19  	"io"
    20  	"os"
    21  
    22  	"emperror.dev/errors"
    23  	"github.com/go-logr/logr"
    24  	"github.com/spf13/cast"
    25  )
    26  
    27  var GlobalLogLevel = 0
    28  
    29  var Log = NewLogger("", os.Stderr, os.Stderr, 0)
    30  
    31  func NewLogger(name string, out, err io.Writer, level int) logr.Logger {
    32  	sink := &logSink{
    33  		name:   name,
    34  		values: make([]interface{}, 0),
    35  		out:    out,
    36  		err:    err,
    37  	}
    38  	return logr.New(sink).V(level)
    39  }
    40  
    41  func joinAndSeparatePairs(values []interface{}) string {
    42  	joined := ""
    43  	for i, v := range values {
    44  		joined += cast.ToString(v)
    45  		if i%2 == 0 {
    46  			joined += ": "
    47  		} else {
    48  			if i < len(values)-1 {
    49  				joined += ", "
    50  			}
    51  		}
    52  	}
    53  	return joined
    54  }
    55  
    56  func getDetailedErr(err error) string {
    57  	details := errors.GetDetails(err)
    58  	if len(details) == 0 {
    59  		return err.Error()
    60  	}
    61  	return fmt.Sprintf("%s (%s)", err.Error(), joinAndSeparatePairs(details))
    62  }
    63  
    64  type logSink struct {
    65  	name   string
    66  	values []interface{}
    67  	out    io.Writer
    68  	err    io.Writer
    69  }
    70  
    71  func (s logSink) Init(logr.RuntimeInfo) {}
    72  
    73  func (s logSink) Enabled(level int) bool {
    74  	return GlobalLogLevel >= level
    75  }
    76  
    77  func (s logSink) Info(level int, msg string, keysAndValues ...interface{}) {
    78  	if !s.Enabled(level) {
    79  		return
    80  	}
    81  	s.values = append(s.values, keysAndValues...)
    82  	if len(s.values) == 0 {
    83  		_, _ = fmt.Fprintf(s.out, "%s> %s\n", s.name, msg)
    84  	} else {
    85  		_, _ = fmt.Fprintf(s.out, "%s> %s %s\n", s.name, msg, joinAndSeparatePairs(s.values))
    86  	}
    87  }
    88  
    89  func (s logSink) Error(err error, msg string, keysAndValues ...interface{}) {
    90  	s.values = append(s.values, keysAndValues...)
    91  	if len(s.values) == 0 {
    92  		_, _ = fmt.Fprintf(s.err, "%s> %s %s\n", s.name, msg, getDetailedErr(err))
    93  	} else {
    94  		_, _ = fmt.Fprintf(s.err, "%s> %s %s %s\n", s.name, msg, getDetailedErr(err), joinAndSeparatePairs(s.values))
    95  	}
    96  }
    97  
    98  func (s logSink) WithValues(keysAndValues ...interface{}) logr.LogSink {
    99  	l := len(s.values)
   100  	s.values = append(s.values[:l:l], keysAndValues...)
   101  	return s
   102  }
   103  
   104  func (s logSink) WithName(name string) logr.LogSink {
   105  	s.name += name
   106  	return s
   107  }