36 lines
879 B
Go
36 lines
879 B
Go
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// Wrapper for standard library log, with the only difference is that it has extra function Tracef() and optional verbose flag to enable output from that.
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package log
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import (
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"fmt"
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"log"
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"os"
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"path"
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"runtime"
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"strings"
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)
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var Verbose = false
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// Printf calls Output to print to the standard logger.
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// Arguments are handled in the manner of fmt.Printf.
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func Printf(format string, v ...interface{}) {
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log.Printf(format, v...)
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}
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func Tracef(format string, v ...interface{}) {
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if Verbose {
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pc := make([]uintptr, 10) // at least 1 entry needed
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runtime.Callers(2, pc)
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f := runtime.FuncForPC(pc[0])
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var buf strings.Builder
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buf.WriteString(fmt.Sprintf("%s(): ", path.Base(f.Name())))
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text := fmt.Sprintf(format, v...)
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buf.WriteString(text)
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if len(text) == 0 || text[len(text)-1] != '\n' {
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buf.WriteRune('\n')
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}
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fmt.Fprint(os.Stderr, buf.String())
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}
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}
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