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log.go
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log.go
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// Copyright © 2019 Banzai Cloud
//
// Licensed 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 utils
import (
"fmt"
"io"
"os"
"emperror.dev/errors"
"github.com/go-logr/logr"
"github.com/spf13/cast"
)
type logger struct {
level int
name string
values []interface{}
out io.Writer
err io.Writer
}
var GlobalLogLevel = 0
var Log logr.Logger = logger{
level: 0,
out: os.Stderr,
err: os.Stderr,
}
// Info implements logr.InfoLogger
func (log logger) Info(msg string, vals ...interface{}) {
if GlobalLogLevel >= log.level {
allVal := append(vals, log.values...)
if len(allVal) == 0 {
fmt.Fprintf(log.out, "%s> %s\n", log.name, msg)
} else {
fmt.Fprintf(log.out, "%s> %s %s\n", log.name, msg, joinAndSeparatePairs(allVal))
}
}
}
// Enabled implements logr.InfoLogger
func (logger) Enabled() bool {
return true
}
// Error implements logr.logger
func (log logger) Error(e error, msg string, vals ...interface{}) {
allVal := append(vals, log.values...)
if len(allVal) == 0 {
fmt.Fprintf(log.err, "%s> %s %s\n", log.name, msg, getDetailedErr(e))
} else {
fmt.Fprintf(log.err, "%s> %s %s %s\n", log.name, msg, getDetailedErr(e), joinAndSeparatePairs(allVal))
}
}
// V implements logr.logger
func (log logger) V(level int) logr.InfoLogger {
return logger{
name: log.name,
level: level,
values: log.values,
out: log.out,
err: log.err,
}
}
// WithName implements logr.logger
func (log logger) WithName(name string) logr.Logger {
return logger{
name: name,
level: log.level,
values: log.values,
out: log.out,
err: log.err,
}
}
// WithValues implements logr.logger
func (log logger) WithValues(values ...interface{}) logr.Logger {
return logger{
name: log.name,
level: log.level,
values: values,
out: log.out,
err: log.err,
}
}
func joinAndSeparatePairs(vals []interface{}) string {
joined := ""
for i, v := range vals {
joined += cast.ToString(v)
if i%2 == 0 {
joined = joined + ": "
} else {
if i < len(vals)-1 {
joined = joined + ", "
}
}
}
return joined
}
func getDetailedErr(err error) string {
details := errors.GetDetails(err)
if len(details) == 0 {
return err.Error()
}
return fmt.Sprintf("%s (%s)", err.Error(), joinAndSeparatePairs(details))
}