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log.go
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log.go
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package core
import (
"fmt"
"runtime"
"strings"
)
const (
LogLevelOff int = 0
LogLevelApp int = 1
LogLevelErr int = 2
LogLevelWarn int = 3
LogLevelInfo int = 4
LogLevelDebug int = 5
)
var (
ShouldLogLineNumber = true // Print the line that emitted the log
)
func Debug(format string, a ...interface{}) {
if LogLevel >= LogLevelDebug {
out(fmt.Sprintf("%s", fmt.Sprintf(format, a...)))
}
}
func Info(format string, a ...interface{}) {
if LogLevel >= LogLevelInfo {
out(fmt.Sprintf("%s", fmt.Sprintf(format, a...)))
}
}
func Warn(format string, a ...interface{}) {
if LogLevel >= LogLevelWarn {
out(fmt.Sprintf("WARN: %s", fmt.Sprintf(format, a...)))
}
}
func Error(format string, a ...interface{}) {
if LogLevel >= LogLevelErr {
out(fmt.Sprintf("ERROR: %s", fmt.Sprintf(format, a...)))
}
}
func Application(format string, a ...interface{}) {
if LogLevel >= LogLevelApp {
// out(fmt.Sprintf(format, a...))
// TODO: Use out here, please
fmt.Println(fmt.Sprintf(format, a...))
}
}
func out(mess string) {
// Injectible writer-- useful for JS
// if writer != nil {
// writer.Write(fmt.Sprintf("[%s] %s", trace(), mess))
// }
if ShouldLogLineNumber {
fmt.Println(fmt.Sprintf("[%s] %s", trace(), mess))
} else {
fmt.Println(fmt.Sprintf("%s", mess))
}
}
func trace() string {
pc := make([]uintptr, 10) // at least 1 entry needed
runtime.Callers(4, pc)
f := runtime.FuncForPC(pc[0])
file, line := f.FileLine(pc[0])
parts := strings.Split(file, "/")
if len(parts) > 3 {
last := parts[len(parts)-2:]
file = strings.Join(last, ".")
}
return fmt.Sprintf("%s:%d", strings.TrimSuffix(file, ".go"), line)
}