Print to stderr by default

Co-authored-by: jolheiser <john.olheiser@gmail.com>
Reviewed-on: https://gitea.com/jolheiser/beaver/pulls/5
Co-authored-by: John Olheiser <john.olheiser@gmail.com>
Co-committed-by: John Olheiser <john.olheiser@gmail.com>

color/basic.go

@@ -82,9 +82,15 @@ func (b *Basic) unformat() string {
 	return fmt.Sprintf("%s[%dm", escape, Reset)
 }
 
+// Format returns a string wrapped in the basic color
 func (b *Basic) Format(text string) string {
 	if len(b.Attrs) > 0 {
 		return b.wrap(text)
 	}
 	return text
 }
+
+// Formatf returns a formatted string wrapped in the basic color
+func (b *Basic) Formatf(format string, v ...interface{}) string {
+	return b.Format(fmt.Sprintf(format, v...))
+}

color/basic_colors.go

@@ -47,3 +47,24 @@ const (
 	BgHiCyan
 	BgHiWhite
 )
+
+var attrCache = make(map[BasicAttribute]*Basic)
+
+func attr(a BasicAttribute) *Basic {
+	if c, ok := attrCache[a]; ok {
+		return c
+	}
+	c := New(a)
+	attrCache[a] = c
+	return c
+}
+
+// Format is a quick way to format a string using a single attribute
+func (a BasicAttribute) Format(text string) string {
+	return attr(a).Format(text)
+}
+
+// Format is a quick way to format a formatted string using a single attribute
+func (a BasicAttribute) Formatf(text string, v ...interface{}) string {
+	return attr(a).Formatf(text, v...)
+}

color/color.go

@@ -8,6 +8,7 @@ const escape = "\x1b"
 
 type Color interface {
 	Format(text string) string
+	Formatf(text string, v ...interface{}) string
 }
 
 // ParseLevel parses a string and returns a Beaver Level's Color, defaulting to Info

color/extended.go

@@ -43,6 +43,12 @@ func (e *Extended) unformat() string {
 	return fmt.Sprintf("%s[%dm", escape, Reset)
 }
 
+// Format returns a string wrapped in the extended color
 func (e *Extended) Format(text string) string {
 	return e.wrap(text)
 }
+
+// Formatf returns a formatted string wrapped in the extended color
+func (e *Extended) Formatf(text string, v ...interface{}) string {
+	return e.wrap(fmt.Sprintf(text, v...))
+}

color/true.go

@@ -40,6 +40,12 @@ func (t *True) unformat() string {
 	return fmt.Sprintf("%s[%dm", escape, Reset)
 }
 
+// Format returns a string wrapped in the true color
 func (t *True) Format(text string) string {
 	return t.wrap(text)
 }
+
+// Formatf returns a formatted string wrapped in the true color
+func (t *True) Formatf(text string, v ...interface{}) string {
+	return t.wrap(fmt.Sprintf(text, v...))
+}

console.go

@@ -6,7 +6,7 @@ import (
 
 var (
 	Console = &Logger{
-		Writer: os.Stdout,
+		Writer: os.Stderr,
 		Level:  INFO,
 		Format: FormatOptions{
 			MessageColor: true,

level.go

@@ -3,7 +3,6 @@ package beaver
 import (
 	"fmt"
 	"strings"
-	"time"
 
 	"go.jolheiser.com/beaver/color"
 )
@@ -105,38 +104,3 @@ func ParseLevel(level string) Level {
 	}
 	return INFO
 }
-
-func timePrefix(t time.Time) string {
-	var buf = &[]byte{}
-	year, month, day := t.Date()
-	itoa(buf, int(month), 2)
-	*buf = append(*buf, '/')
-	itoa(buf, day, 2)
-	*buf = append(*buf, '/')
-	itoa(buf, year, 4)
-	*buf = append(*buf, ' ')
-
-	hour, min, sec := t.Clock()
-	itoa(buf, hour, 2)
-	*buf = append(*buf, ':')
-	itoa(buf, min, 2)
-	*buf = append(*buf, ':')
-	itoa(buf, sec, 2)
-
-	return string(*buf)
-}
-
-func itoa(buf *[]byte, i int, wid int) {
-	var b [20]byte
-	bp := len(b) - 1
-	for i >= 10 || wid > 1 {
-		wid--
-		q := i / 10
-		b[bp] = byte('0' + i - q*10)
-		bp--
-		i = q
-	}
-	// i < 10
-	b[bp] = byte('0' + i)
-	*buf = append(*buf, b[bp:]...)
-}

logger.go

@@ -42,7 +42,7 @@ func (l *Logger) write(level Level, text string) {
 	if l.Level <= level {
 		var message string
 		if l.Format.TimePrefix {
-			message += color.Time.Format(timePrefix(time.Now())) + " "
+			message += color.Time.Format(time.Now().Format("01/02/2006 15:04:05")) + " "
 		}
 		if l.Format.StackPrefix {
 			_, file, line, _ := runtime.Caller(l.skip)