X-Git-Url: http://www.git.cypherpunks.ru/?a=blobdiff_plain;f=log.go;h=4d8a982813a1e58a31c43fafbcad3f4d2d4336dd;hb=d830f32d30e4ea9d9f06ae835db6ec5c4822dcfc;hp=e1586c7907586f9830e603e7f64b2bcd3c78081c;hpb=a3d6bbf97e90bf923142d061bc68b28cc1dec2a8;p=goredo.git

diff --git a/log.go b/log.go
index e1586c7..4d8a982 100644
--- a/log.go
+++ b/log.go
@@ -1,6 +1,6 @@
 /*
-goredo -- redo implementation on pure Go
-Copyright (C) 2020 Sergey Matveev <stargrave@stargrave.org>
+goredo -- djb's redo implementation on pure Go
+Copyright (C) 2020-2021 Sergey Matveev <stargrave@stargrave.org>
 
 This program is free software: you can redistribute it and/or modify
 it under the terms of the GNU General Public License as published by
@@ -62,14 +62,14 @@ var (
 	CNone  string = "NONE"
 
 	flagNoProgress = flag.Bool("no-progress", false, fmt.Sprintf("no progress printing (%s=1), also implies -no-status", EnvNoProgress))
-	flagDebug      = flag.Bool("debug", false, fmt.Sprintf("enable debug logging (%s=1)", EnvDebug))
+	flagDebug      = flag.Bool("d", false, fmt.Sprintf("enable debug logging (%s=1)", EnvDebug))
 	flagLogWait    = flag.Bool("log-wait", false, fmt.Sprintf("enable wait messages logging (%s=1)", EnvLogWait))
 	flagLogLock    = flag.Bool("log-lock", false, fmt.Sprintf("enable lock messages logging (%s=1)", EnvLogLock))
 	flagLogPid     = flag.Bool("log-pid", false, fmt.Sprintf("append PIDs (%s=1)", EnvLogPid))
 	flagLogJS      = flag.Bool("log-js", false, fmt.Sprintf("enable jobserver messages logging (%s=1)", EnvLogJS))
 
-	LogMutex   sync.Mutex
-	LogLenPrev int
+	LogMutex     sync.Mutex
+	KeyEraseLine string
 )
 
 func init() {
@@ -83,17 +83,14 @@ func init() {
 	CWarn = string(t.Escape.Magenta)
 	CJS = string(t.Escape.White)
 	CReset = string(t.Escape.Reset)
+	KeyEraseLine = fmt.Sprintf("%s[K", CReset[0:1])
 }
 
-func fillUpToTermSize(s, end string) string {
-	sLen := len(s)
-	if sLen < LogLenPrev {
-		s += strings.Repeat(" ", LogLenPrev-sLen)
-		LogLenPrev = sLen
-	} else {
-		LogLenPrev = sLen
+func erasedStatus(s, end string) string {
+	if NoProgress {
+		return s + end
 	}
-	return s + end
+	return s + KeyEraseLine + end
 }
 
 func trace(level, format string, args ...interface{}) {
@@ -103,10 +100,9 @@ func trace(level, format string, args ...interface{}) {
 	}
 	switch level {
 	case CNone:
+		p = erasedStatus(StderrPrefix+p+fmt.Sprintf(format, args...), "\n")
 		LogMutex.Lock()
-		os.Stderr.WriteString(fillUpToTermSize(
-			StderrPrefix+p+fmt.Sprintf(format, args...), "\n",
-		))
+		os.Stderr.WriteString(p)
 		LogMutex.Unlock()
 		return
 	case CDebug:
@@ -141,8 +137,9 @@ func trace(level, format string, args ...interface{}) {
 	}
 	msg := fmt.Sprintf(format, args...)
 	msg = StderrPrefix + colourize(level, p+strings.Repeat(". ", Level)+msg)
+	msg = erasedStatus(msg, "\n")
 	LogMutex.Lock()
-	os.Stderr.WriteString(fillUpToTermSize(msg, "\n"))
+	os.Stderr.WriteString(msg)
 	LogMutex.Unlock()
 }