/
colored_log.go
65 lines (55 loc) · 1.13 KB
/
colored_log.go
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package util
import (
"fmt"
"hash/fnv"
"io"
"strings"
"github.com/fatih/color"
)
var colors = []color.Attribute{
color.FgRed,
color.FgGreen,
color.FgYellow,
color.FgBlue,
color.FgMagenta,
color.FgCyan,
}
func chooseColor(data string) color.Attribute {
h := fnv.New32a()
_, err := h.Write([]byte(data))
if err != nil {
panic(err)
}
num := int(h.Sum32() % uint32(len(colors)))
return colors[num]
}
func NewColoredLogWriter(kind, name string, writer io.Writer) *coloredLogWriter {
c := chooseColor(name)
return &coloredLogWriter{
prefix: fmt.Sprintf("[%s] %s - ", kind, name),
writer: writer,
color: color.New(c),
}
}
type coloredLogWriter struct {
prefix string
writer io.Writer
color *color.Color
prev string
}
func (w *coloredLogWriter) Write(p []byte) (n int, err error) {
n = len(p)
input := string(p)
input = strings.Replace(input, "\r\n", "\n", -1)
input = w.prev + input
inputs := strings.Split(input, "\n")
w.prev = inputs[len(inputs)-1]
inputs = inputs[:len(inputs)-1]
for _, s := range inputs {
_, err = w.color.Fprintln(w.writer, w.prefix+s)
if err != nil {
return
}
}
return
}