add a -csv option, that just shows the raw nanoseconds then , the…

…n the line, making the output convenient for ploting/analysing with a spreadsheet app like Excel

go.mod

@@ -0,0 +1,3 @@
+module github.com/spytheman/gostamp
+
+go 1.19

main.go

@@ -18,6 +18,7 @@ type programSettings struct {
 	showVersion bool
 	useColor    bool
 	useAbsolute bool
+	useCsv      bool
 	showStart   bool
 	showEnd     bool
 	mergeErr    bool
@@ -41,6 +42,7 @@ func init() {
 	}
 	flag.BoolVar(&settings.showVersion, "version", false, "show the tool version")
 	flag.BoolVar(&settings.useColor, "color", true, "colorize the output")
+	flag.BoolVar(&settings.useCsv, "csv", false, "do not format the output at all, just show the time in ns, followed by ',' then the output")
 	flag.BoolVar(&settings.useAbsolute, "absolute", false, "use absolute timestamps")
 	flag.BoolVar(&settings.showStart, "start", true, "timestamp the start of the execution")
 	flag.BoolVar(&settings.showEnd, "end", true, "timestamp the end of the execution")
@@ -57,6 +59,9 @@ func init() {
 	if !settings.useColor {
 		terminal.TurnOffColor()
 	}
+	if settings.useCsv {
+		terminal.TurnOnCsv()
+	}
 	if settings.useAbsolute {
 		terminal.TurnOnAbsoluteTimestamps()
 	}

terminal/terminal.go

@@ -119,21 +119,41 @@ func lineOut(stream io.Writer, tCode string, s string) {
 func writeTerminalLine(tLine terminalLine) {
 	if absoluteTimestamps {
 		now := tLine.timestamp
-		fmt.Fprintf(tLine.stream, "%s[%04d-%02d-%02d %02d:%02d:%02d.%06d]%s %s\n",
-			tLine.tCode,
-			now.Year(), now.Month(), now.Day(),
-			now.Hour(), now.Minute(), now.Second(),
-			now.Nanosecond()/1000,
-			tColorLineEnd,
-			tLine.s)
+		if csvOutput {
+			fmt.Fprintf(tLine.stream, "%04d-%02d-%02d %02d:%02d:%02d.%06d,%s\n",
+				now.Year(), now.Month(), now.Day(),
+				now.Hour(), now.Minute(), now.Second(),
+				now.Nanosecond()/1000,
+				tLine.s)
+		} else {
+			fmt.Fprintf(tLine.stream, "%s[%04d-%02d-%02d %02d:%02d:%02d.%06d]%s %s\n",
+				tLine.tCode,
+				now.Year(), now.Month(), now.Day(),
+				now.Hour(), now.Minute(), now.Second(),
+				now.Nanosecond()/1000,
+				tColorLineEnd,
+				tLine.s)
+		}
 	} else {
-		fmt.Fprintf(tLine.stream, "%s[%12s]%s %s\n",
-			tLine.tCode,
-			time.Since(previousTerminalLineTime).Round(timestampRoundResolution).String(),
-			tColorLineEnd,
-			tLine.s)
+		if csvOutput {
+			fmt.Fprintf(tLine.stream, "%12d,%s\n",
+				time.Since(previousTerminalLineTime),
+				tLine.s)
+		} else {
+			fmt.Fprintf(tLine.stream, "%s[%12s]%s %s\n",
+				tLine.tCode,
+				time.Since(previousTerminalLineTime).Round(timestampRoundResolution).String(),
+				tColorLineEnd,
+				tLine.s)
+		}
 		if !timeRelativeToStart {
 			previousTerminalLineTime = tLine.timestamp
 		}
 	}
 }
+
+var csvOutput = false
+
+func TurnOnCsv() {
+	csvOutput = true
+}