wings/loggers/cli/cli.go

78 lines
1.7 KiB
Go

package cli
import (
"emperror.dev/errors"
"fmt"
"github.com/apex/log"
"github.com/apex/log/handlers/cli"
color2 "github.com/fatih/color"
"github.com/mattn/go-colorable"
"io"
"os"
"sync"
"time"
)
var Default = New(os.Stderr, true)
var bold = color2.New(color2.Bold)
var boldred = color2.New(color2.Bold, color2.FgRed)
var Strings = [...]string{
log.DebugLevel: "DEBUG",
log.InfoLevel: " INFO",
log.WarnLevel: " WARN",
log.ErrorLevel: "ERROR",
log.FatalLevel: "FATAL",
}
type Handler struct {
mu sync.Mutex
Writer io.Writer
Padding int
}
func New(w io.Writer, useColors bool) *Handler {
if f, ok := w.(*os.File); ok {
if useColors {
return &Handler{Writer: colorable.NewColorable(f), Padding: 2}
}
}
return &Handler{Writer: colorable.NewNonColorable(w), Padding: 2}
}
// HandleLog implements log.Handler.
func (h *Handler) HandleLog(e *log.Entry) error {
color := cli.Colors[e.Level]
level := Strings[e.Level]
names := e.Fields.Names()
h.mu.Lock()
defer h.mu.Unlock()
color.Fprintf(h.Writer, "%s: [%s] %-25s", bold.Sprintf("%*s", h.Padding+1, level), time.Now().Format(time.StampMilli), e.Message)
for _, name := range names {
if name == "source" {
continue
}
fmt.Fprintf(h.Writer, " %s=%v", color.Sprint(name), e.Fields.Get(name))
}
fmt.Fprintln(h.Writer)
for _, name := range names {
if name != "error" {
continue
}
if err, ok := e.Fields.Get("error").(error); ok {
// Attach the stacktrace if it is missing at this point, but don't point
// it specifically to this line since that is irrelevant.
err = errors.WithStackDepthIf(err, 1)
fmt.Fprintf(h.Writer, "\n%s\n%+v\n\n", boldred.Sprintf("Stacktrace:"), err)
}
}
return nil
}