Upgrade server dependencies, manage them with govendor

vendor/github.com/spf13/jwalterweatherman/notepad.go

@@ -0,0 +1,195 @@
+// Copyright © 2016 Steve Francia <spf@spf13.com>.
+//
+// Use of this source code is governed by an MIT-style
+// license that can be found in the LICENSE file.
+
+package jwalterweatherman
+
+import (
+	"fmt"
+	"io"
+	"log"
+	"os"
+)
+
+type Threshold int
+
+func (t Threshold) String() string {
+	return prefixes[t]
+}
+
+const (
+	LevelTrace Threshold = iota
+	LevelDebug
+	LevelInfo
+	LevelWarn
+	LevelError
+	LevelCritical
+	LevelFatal
+)
+
+var prefixes map[Threshold]string = map[Threshold]string{
+	LevelTrace:    "TRACE",
+	LevelDebug:    "DEBUG",
+	LevelInfo:     "INFO",
+	LevelWarn:     "WARN",
+	LevelError:    "ERROR",
+	LevelCritical: "CRITICAL",
+	LevelFatal:    "FATAL",
+}
+
+func prefix(t Threshold) string {
+	return t.String() + " "
+}
+
+// Notepad is where you leave a note !
+type Notepad struct {
+	TRACE    *log.Logger
+	DEBUG    *log.Logger
+	INFO     *log.Logger
+	WARN     *log.Logger
+	ERROR    *log.Logger
+	CRITICAL *log.Logger
+	FATAL    *log.Logger
+
+	LOG      *log.Logger
+	FEEDBACK *Feedback
+
+	loggers         []**log.Logger
+	logHandle       io.Writer
+	outHandle       io.Writer
+	logThreshold    Threshold
+	stdoutThreshold Threshold
+	prefix          string
+	flags           int
+
+	// One per Threshold
+	logCounters [7]*logCounter
+}
+
+// NewNotepad create a new notepad.
+func NewNotepad(outThreshold Threshold, logThreshold Threshold, outHandle, logHandle io.Writer, prefix string, flags int) *Notepad {
+	n := &Notepad{}
+
+	n.loggers = append(n.loggers, &n.TRACE, &n.DEBUG, &n.INFO, &n.WARN, &n.ERROR, &n.CRITICAL, &n.FATAL)
+	n.logHandle = logHandle
+	n.outHandle = outHandle
+	n.logThreshold = logThreshold
+	n.stdoutThreshold = outThreshold
+
+	if len(prefix) != 0 {
+		n.prefix = "[" + prefix + "] "
+	} else {
+		n.prefix = ""
+	}
+
+	n.flags = flags
+
+	n.LOG = log.New(n.logHandle,
+		"LOG:   ",
+		n.flags)
+
+	n.FEEDBACK = &Feedback{n}
+
+	n.init()
+
+	return n
+}
+
+// Feedback is special. It writes plainly to the output while
+// logging with the standard extra information (date, file, etc)
+// Only Println and Printf are currently provided for this
+type Feedback struct {
+	*Notepad
+}
+
+// init create the loggers for each level depending on the notepad thresholds
+func (n *Notepad) init() {
+	bothHandle := io.MultiWriter(n.outHandle, n.logHandle)
+
+	for t, logger := range n.loggers {
+		threshold := Threshold(t)
+		counter := &logCounter{}
+		n.logCounters[t] = counter
+
+		switch {
+		case threshold >= n.logThreshold && threshold >= n.stdoutThreshold:
+			*logger = log.New(io.MultiWriter(counter, bothHandle), n.prefix+prefix(threshold), n.flags)
+
+		case threshold >= n.logThreshold:
+			*logger = log.New(io.MultiWriter(counter, n.logHandle), n.prefix+prefix(threshold), n.flags)
+
+		case threshold >= n.stdoutThreshold:
+			*logger = log.New(io.MultiWriter(counter, os.Stdout), n.prefix+prefix(threshold), n.flags)
+
+		default:
+			*logger = log.New(counter, n.prefix+prefix(threshold), n.flags)
+		}
+	}
+}
+
+// SetLogThreshold change the threshold above which messages are written to the
+// log file
+func (n *Notepad) SetLogThreshold(threshold Threshold) {
+	n.logThreshold = threshold
+	n.init()
+}
+
+// SetLogOutput change the file where log messages are written
+func (n *Notepad) SetLogOutput(handle io.Writer) {
+	n.logHandle = handle
+	n.init()
+}
+
+// GetStdoutThreshold returns the defined Treshold for the log logger.
+func (n *Notepad) GetLogThreshold() Threshold {
+	return n.logThreshold
+}
+
+// SetStdoutThreshold change the threshold above which messages are written to the
+// standard output
+func (n *Notepad) SetStdoutThreshold(threshold Threshold) {
+	n.stdoutThreshold = threshold
+	n.init()
+}
+
+// GetStdoutThreshold returns the Treshold for the stdout logger.
+func (n *Notepad) GetStdoutThreshold() Threshold {
+	return n.stdoutThreshold
+}
+
+// SetPrefix change the prefix used by the notepad. Prefixes are displayed between
+// brackets at the begining of the line. An empty prefix won't be displayed at all.
+func (n *Notepad) SetPrefix(prefix string) {
+	if len(prefix) != 0 {
+		n.prefix = "[" + prefix + "] "
+	} else {
+		n.prefix = ""
+	}
+	n.init()
+}
+
+// SetFlags choose which flags the logger will display (after prefix and message
+// level). See the package log for more informations on this.
+func (n *Notepad) SetFlags(flags int) {
+	n.flags = flags
+	n.init()
+}
+
+// Feedback is special. It writes plainly to the output while
+// logging with the standard extra information (date, file, etc)
+// Only Println and Printf are currently provided for this
+func (fb *Feedback) Println(v ...interface{}) {
+	s := fmt.Sprintln(v...)
+	fmt.Print(s)
+	fb.LOG.Output(2, s)
+}
+
+// Feedback is special. It writes plainly to the output while
+// logging with the standard extra information (date, file, etc)
+// Only Println and Printf are currently provided for this
+func (fb *Feedback) Printf(format string, v ...interface{}) {
+	s := fmt.Sprintf(format, v...)
+	fmt.Print(s)
+	fb.LOG.Output(2, s)
+}