1 files changed, 225 insertions, 0 deletions
diff --git a/vendor/github.com/spf13/jwalterweatherman/notepad.go b/vendor/github.com/spf13/jwalterweatherman/notepad.go
new file mode 100644
index 000000000..cc7957bf7
--- /dev/null
+++ b/vendor/github.com/spf13/jwalterweatherman/notepad.go
@@ -0,0 +1,225 @@
+// 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"
+	"io/ioutil"
+	"log"
+)
+
+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",
+}
+
+// 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         [7]**log.Logger
+	logHandle       io.Writer
+	outHandle       io.Writer
+	logThreshold    Threshold
+	stdoutThreshold Threshold
+	prefix          string
+	flags           int
+
+	logListeners []LogListener
+}
+
+// A LogListener can ble supplied to a Notepad to listen on log writes for a given
+// threshold. This can be used to capture log events in unit tests and similar.
+// Note that this function will be invoked once for each log threshold. If
+// the given threshold is not of interest to you, return nil.
+// Note that these listeners will receive log events for a given threshold, even
+// if the current configuration says not to log it. That way you can count ERRORs even
+// if you don't print them to the console.
+type LogListener func(t Threshold) io.Writer
+
+// NewNotepad creates a new Notepad.
+func NewNotepad(
+	outThreshold Threshold,
+	logThreshold Threshold,
+	outHandle, logHandle io.Writer,
+	prefix string, flags int,
+	logListeners ...LogListener,
+) *Notepad {
+
+	n := &Notepad{logListeners: logListeners}
+
+	n.loggers = [7]**log.Logger{&n.TRACE, &n.DEBUG, &n.INFO, &n.WARN, &n.ERROR, &n.CRITICAL, &n.FATAL}
+	n.outHandle = outHandle
+	n.logHandle = logHandle
+	n.stdoutThreshold = outThreshold
+	n.logThreshold = logThreshold
+
+	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{out: log.New(outHandle, "", 0), log: n.LOG}
+
+	n.init()
+	return n
+}
+
+// init creates the loggers for each level depending on the notepad thresholds.
+func (n *Notepad) init() {
+	logAndOut := io.MultiWriter(n.outHandle, n.logHandle)
+
+	for t, logger := range n.loggers {
+		threshold := Threshold(t)
+		prefix := n.prefix + threshold.String() + " "
+
+		switch {
+		case threshold >= n.logThreshold && threshold >= n.stdoutThreshold:
+			*logger = log.New(n.createLogWriters(threshold, logAndOut), prefix, n.flags)
+
+		case threshold >= n.logThreshold:
+			*logger = log.New(n.createLogWriters(threshold, n.logHandle), prefix, n.flags)
+
+		case threshold >= n.stdoutThreshold:
+			*logger = log.New(n.createLogWriters(threshold, n.outHandle), prefix, n.flags)
+
+		default:
+			*logger = log.New(n.createLogWriters(threshold, ioutil.Discard), prefix, n.flags)
+		}
+	}
+}
+
+func (n *Notepad) createLogWriters(t Threshold, handle io.Writer) io.Writer {
+	if len(n.logListeners) == 0 {
+		return handle
+	}
+	writers := []io.Writer{handle}
+	for _, l := range n.logListeners {
+		w := l(t)
+		if w != nil {
+			writers = append(writers, w)
+		}
+	}
+
+	if len(writers) == 1 {
+		return handle
+	}
+
+	return io.MultiWriter(writers...)
+}
+
+// SetLogThreshold changes the threshold above which messages are written to the
+// log file.
+func (n *Notepad) SetLogThreshold(threshold Threshold) {
+	n.logThreshold = threshold
+	n.init()
+}
+
+// SetLogOutput changes 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 changes 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 changes the prefix used by the notepad. Prefixes are displayed between
+// brackets at the beginning 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 writes plainly to the outHandle while
+// logging with the standard extra information (date, file, etc).
+type Feedback struct {
+	out *log.Logger
+	log *log.Logger
+}
+
+func (fb *Feedback) Println(v ...interface{}) {
+	fb.output(fmt.Sprintln(v...))
+}
+
+func (fb *Feedback) Printf(format string, v ...interface{}) {
+	fb.output(fmt.Sprintf(format, v...))
+}
+
+func (fb *Feedback) Print(v ...interface{}) {
+	fb.output(fmt.Sprint(v...))
+}
+
+func (fb *Feedback) output(s string) {
+	if fb.out != nil {
+		fb.out.Output(2, s)
+	}
+	if fb.log != nil {
+		fb.log.Output(2, s)
+	}
+}