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74 lines
2.1 KiB
74 lines
2.1 KiB
package log
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import (
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"fmt"
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"io"
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kitlog "github.com/go-kit/kit/log"
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"github.com/go-kit/kit/log/level"
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"github.com/go-kit/kit/log/term"
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)
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const (
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msgKey = "_msg" // "_" prefixed to avoid collisions
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)
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type tmLogger struct {
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srcLogger kitlog.Logger
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}
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// NewTMTermLogger returns a logger that encodes msg and keyvals to the Writer
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// using go-kit's log as an underlying logger and our custom formatter. Note
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// that underlying logger could be swapped with something else.
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func NewTMLogger(w io.Writer) Logger {
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// Color by level value
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colorFn := func(keyvals ...interface{}) term.FgBgColor {
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if keyvals[0] != level.Key() {
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panic(fmt.Sprintf("expected level key to be first, got %v", keyvals[0]))
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}
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switch keyvals[1].(level.Value).String() {
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case "debug":
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return term.FgBgColor{Fg: term.DarkGray}
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case "error":
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return term.FgBgColor{Fg: term.Red}
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default:
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return term.FgBgColor{}
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}
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}
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srcLogger := term.NewLogger(w, NewTMFmtLogger, colorFn)
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srcLogger = level.NewFilter(srcLogger, level.AllowInfo())
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return &tmLogger{srcLogger}
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}
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// WithLevel returns a copy of the logger with a level set to lvl.
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func (l *tmLogger) WithLevel(lvl string) Logger {
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switch lvl {
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case "info":
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return &tmLogger{level.NewFilter(l.srcLogger, level.AllowInfo())}
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case "debug":
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return &tmLogger{level.NewFilter(l.srcLogger, level.AllowDebug())}
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case "error":
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return &tmLogger{level.NewFilter(l.srcLogger, level.AllowError())}
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default:
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panic(fmt.Sprintf("Unexpected level %v, expect either \"info\" or \"debug\" or \"error\"", lvl))
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}
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}
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// Info logs a message at level Info.
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func (l *tmLogger) Info(msg string, keyvals ...interface{}) error {
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lWithLevel := level.Info(l.srcLogger)
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return kitlog.With(lWithLevel, msgKey, msg).Log(keyvals...)
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}
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// Debug logs a message at level Debug.
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func (l *tmLogger) Debug(msg string, keyvals ...interface{}) error {
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lWithLevel := level.Debug(l.srcLogger)
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return kitlog.With(lWithLevel, msgKey, msg).Log(keyvals...)
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}
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// Error logs a message at level Error.
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func (l *tmLogger) Error(msg string, keyvals ...interface{}) error {
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lWithLevel := level.Error(l.srcLogger)
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return kitlog.With(lWithLevel, msgKey, msg).Log(keyvals...)
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}
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