PLT-6076 Adding viper libs for config file changes (#5871)

* Adding viper libs for config file changes

* Removing the old fsnotify lib

* updating some missing libs

vendor/github.com/spf13/jwalterweatherman/.gitignore

@@ -0,0 +1,22 @@
+# Compiled Object files, Static and Dynamic libs (Shared Objects)
+*.o
+*.a
+*.so
+
+# Folders
+_obj
+_test
+
+# Architecture specific extensions/prefixes
+*.[568vq]
+[568vq].out
+
+*.cgo1.go
+*.cgo2.c
+_cgo_defun.c
+_cgo_gotypes.go
+_cgo_export.*
+
+_testmain.go
+
+*.exe

vendor/github.com/spf13/jwalterweatherman/LICENSE

@@ -0,0 +1,21 @@
+The MIT License (MIT)
+
+Copyright (c) 2014 Steve Francia
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.

vendor/github.com/spf13/jwalterweatherman/README.md

@@ -0,0 +1,148 @@
+jWalterWeatherman
+=================
+
+Seamless printing to the terminal (stdout) and logging to a io.Writer
+(file) that’s as easy to use as fmt.Println.
+
+![and_that__s_why_you_always_leave_a_note_by_jonnyetc-d57q7um](https://cloud.githubusercontent.com/assets/173412/11002937/ccd01654-847d-11e5-828e-12ebaf582eaf.jpg)
+Graphic by [JonnyEtc](http://jonnyetc.deviantart.com/art/And-That-s-Why-You-Always-Leave-a-Note-315311422)
+
+JWW is primarily a wrapper around the excellent standard log library. It
+provides a few advantages over using the standard log library alone.
+
+1. Ready to go out of the box. 
+2. One library for both printing to the terminal and logging (to files).
+3. Really easy to log to either a temp file or a file you specify.
+
+
+I really wanted a very straightforward library that could seamlessly do
+the following things.
+
+1. Replace all the println, printf, etc statements thought my code with
+   something more useful
+2. Allow the user to easily control what levels are printed to stdout
+3. Allow the user to easily control what levels are logged
+4. Provide an easy mechanism (like fmt.Println) to print info to the user
+   which can be easily logged as well 
+5. Due to 2 & 3 provide easy verbose mode for output and logs
+6. Not have any unnecessary initialization cruft. Just use it.
+
+# Usage
+
+## Step 1. Use it
+Put calls throughout your source based on type of feedback.
+No initialization or setup needs to happen. Just start calling things.
+
+Available Loggers are:
+
+ * TRACE
+ * DEBUG
+ * INFO
+ * WARN
+ * ERROR
+ * CRITICAL
+ * FATAL
+
+These each are loggers based on the log standard library and follow the
+standard usage. Eg.
+
+```go
+    import (
+        jww "github.com/spf13/jwalterweatherman"
+    )
+
+    ...
+
+    if err != nil {
+
+        // This is a pretty serious error and the user should know about
+        // it. It will be printed to the terminal as well as logged under the
+        // default thresholds.
+
+        jww.ERROR.Println(err)
+    }
+
+    if err2 != nil {
+        // This error isn’t going to materially change the behavior of the
+        // application, but it’s something that may not be what the user
+        // expects. Under the default thresholds, Warn will be logged, but
+        // not printed to the terminal. 
+
+        jww.WARN.Println(err2)
+    }
+
+    // Information that’s relevant to what’s happening, but not very
+    // important for the user. Under the default thresholds this will be
+    // discarded.
+
+    jww.INFO.Printf("information %q", response)
+
+```
+
+NOTE: You can also use the library in a non-global setting by creating an instance of a Notebook:
+
+```go
+notepad = jww.NewNotepad(jww.LevelInfo, jww.LevelTrace, os.Stdout, ioutil.Discard, "", log.Ldate|log.Ltime)
+notepad.WARN.Println("Some warning"")
+```
+
+_Why 7 levels?_
+
+Maybe you think that 7 levels are too much for any application... and you
+are probably correct. Just because there are seven levels doesn’t mean
+that you should be using all 7 levels. Pick the right set for your needs.
+Remember they only have to mean something to your project.
+
+## Step 2. Optionally configure JWW
+
+Under the default thresholds :
+
+ * Debug, Trace & Info goto /dev/null
+ * Warn and above is logged (when a log file/io.Writer is provided)
+ * Error and above is printed to the terminal (stdout)
+
+### Changing the thresholds
+
+The threshold can be changed at any time, but will only affect calls that
+execute after the change was made.
+
+This is very useful if your application has a verbose mode. Of course you
+can decide what verbose means to you or even have multiple levels of
+verbosity.
+
+
+```go
+    import (
+        jww "github.com/spf13/jwalterweatherman"
+    )
+
+    if Verbose {
+        jww.SetLogThreshold(jww.LevelTrace)
+        jww.SetStdoutThreshold(jww.LevelInfo)
+    }
+```
+
+Note that JWW's own internal output uses log levels as well, so set the log
+level before making any other calls if you want to see what it's up to.
+
+
+### Setting a log file
+
+JWW can log to any `io.Writer`:
+
+
+```go
+
+    jww.SetLogOutput(customWriter) 
+
+```
+
+
+# More information
+
+This is an early release. I’ve been using it for a while and this is the
+third interface I’ve tried. I like this one pretty well, but no guarantees
+that it won’t change a bit.
+
+I wrote this for use in [hugo](http://hugo.spf13.com). If you are looking
+for a static website engine that’s super fast please checkout Hugo.

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

@@ -0,0 +1,113 @@
+// 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 (
+	"io"
+	"io/ioutil"
+	"log"
+	"os"
+)
+
+var (
+	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
+
+	defaultNotepad *Notepad
+)
+
+func reloadDefaultNotepad() {
+	TRACE = defaultNotepad.TRACE
+	DEBUG = defaultNotepad.DEBUG
+	INFO = defaultNotepad.INFO
+	WARN = defaultNotepad.WARN
+	ERROR = defaultNotepad.ERROR
+	CRITICAL = defaultNotepad.CRITICAL
+	FATAL = defaultNotepad.FATAL
+
+	LOG = defaultNotepad.LOG
+	FEEDBACK = defaultNotepad.FEEDBACK
+}
+
+func init() {
+	defaultNotepad = NewNotepad(LevelError, LevelWarn, os.Stdout, ioutil.Discard, "", log.Ldate|log.Ltime)
+	reloadDefaultNotepad()
+}
+
+// SetLogThreshold set the log threshold for the default notepad. Trace by default.
+func SetLogThreshold(threshold Threshold) {
+	defaultNotepad.SetLogThreshold(threshold)
+	reloadDefaultNotepad()
+}
+
+// SetLogOutput set the log output for the default notepad. Discarded by default.
+func SetLogOutput(handle io.Writer) {
+	defaultNotepad.SetLogOutput(handle)
+	reloadDefaultNotepad()
+}
+
+// SetStdoutThreshold set the standard output threshold for the default notepad.
+// Info by default.
+func SetStdoutThreshold(threshold Threshold) {
+	defaultNotepad.SetStdoutThreshold(threshold)
+	reloadDefaultNotepad()
+}
+
+// SetPrefix set the prefix for the default logger. Empty by default.
+func SetPrefix(prefix string) {
+	defaultNotepad.SetPrefix(prefix)
+	reloadDefaultNotepad()
+}
+
+// SetFlags set the flags for the default logger. "log.Ldate | log.Ltime" by default.
+func SetFlags(flags int) {
+	defaultNotepad.SetFlags(flags)
+	reloadDefaultNotepad()
+}
+
+// Level returns the current global log threshold.
+func LogThreshold() Threshold {
+	return defaultNotepad.logThreshold
+}
+
+// Level returns the current global output threshold.
+func StdoutThreshold() Threshold {
+	return defaultNotepad.stdoutThreshold
+}
+
+// GetStdoutThreshold returns the defined Treshold for the log logger.
+func GetLogThreshold() Threshold {
+	return defaultNotepad.GetLogThreshold()
+}
+
+// GetStdoutThreshold returns the Treshold for the stdout logger.
+func GetStdoutThreshold() Threshold {
+	return defaultNotepad.GetStdoutThreshold()
+}
+
+// LogCountForLevel returns the number of log invocations for a given threshold.
+func LogCountForLevel(l Threshold) uint64 {
+	return defaultNotepad.LogCountForLevel(l)
+}
+
+// LogCountForLevelsGreaterThanorEqualTo returns the number of log invocations
+// greater than or equal to a given threshold.
+func LogCountForLevelsGreaterThanorEqualTo(threshold Threshold) uint64 {
+	return defaultNotepad.LogCountForLevelsGreaterThanorEqualTo(threshold)
+}
+
+// ResetLogCounters resets the invocation counters for all levels.
+func ResetLogCounters() {
+	defaultNotepad.ResetLogCounters()
+}

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

@@ -0,0 +1,102 @@
+// 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 (
+	"bytes"
+	"io/ioutil"
+	"sync"
+	"testing"
+
+	"github.com/stretchr/testify/require"
+)
+
+func TestThresholds(t *testing.T) {
+	SetStdoutThreshold(LevelError)
+	require.Equal(t, StdoutThreshold(), LevelError)
+	SetLogThreshold(LevelCritical)
+	require.Equal(t, LogThreshold(), LevelCritical)
+	require.NotEqual(t, StdoutThreshold(), LevelCritical)
+	SetStdoutThreshold(LevelWarn)
+	require.Equal(t, StdoutThreshold(), LevelWarn)
+}
+
+func TestDefaultLogging(t *testing.T) {
+	var outputBuf, logBuf bytes.Buffer
+
+	defaultNotepad.logHandle = &logBuf
+	defaultNotepad.outHandle = &outputBuf
+
+	SetLogThreshold(LevelWarn)
+	SetStdoutThreshold(LevelError)
+
+	FATAL.Println("fatal err")
+	CRITICAL.Println("critical err")
+	ERROR.Println("an error")
+	WARN.Println("a warning")
+	INFO.Println("information")
+	DEBUG.Println("debugging info")
+	TRACE.Println("trace")
+
+	require.Contains(t, logBuf.String(), "fatal err")
+	require.Contains(t, logBuf.String(), "critical err")
+	require.Contains(t, logBuf.String(), "an error")
+	require.Contains(t, logBuf.String(), "a warning")
+	require.NotContains(t, logBuf.String(), "information")
+	require.NotContains(t, logBuf.String(), "debugging info")
+	require.NotContains(t, logBuf.String(), "trace")
+
+	require.Contains(t, outputBuf.String(), "fatal err")
+	require.Contains(t, outputBuf.String(), "critical err")
+	require.Contains(t, outputBuf.String(), "an error")
+	require.NotContains(t, outputBuf.String(), "a warning")
+	require.NotContains(t, outputBuf.String(), "information")
+	require.NotContains(t, outputBuf.String(), "debugging info")
+	require.NotContains(t, outputBuf.String(), "trace")
+}
+
+func TestLogCounter(t *testing.T) {
+	defaultNotepad.logHandle = ioutil.Discard
+	defaultNotepad.outHandle = ioutil.Discard
+
+	SetLogThreshold(LevelTrace)
+	SetStdoutThreshold(LevelTrace)
+
+	FATAL.Println("fatal err")
+	CRITICAL.Println("critical err")
+	WARN.Println("a warning")
+	WARN.Println("another warning")
+	INFO.Println("information")
+	DEBUG.Println("debugging info")
+	TRACE.Println("trace")
+
+	wg := &sync.WaitGroup{}
+
+	for i := 0; i < 10; i++ {
+		wg.Add(1)
+		go func() {
+			defer wg.Done()
+			for j := 0; j < 10; j++ {
+				ERROR.Println("error", j)
+				// check for data races
+				require.True(t, LogCountForLevel(LevelError) > uint64(j))
+				require.True(t, LogCountForLevelsGreaterThanorEqualTo(LevelError) > uint64(j))
+			}
+		}()
+
+	}
+
+	wg.Wait()
+
+	require.Equal(t, uint64(1), LogCountForLevel(LevelFatal))
+	require.Equal(t, uint64(1), LogCountForLevel(LevelCritical))
+	require.Equal(t, uint64(2), LogCountForLevel(LevelWarn))
+	require.Equal(t, uint64(1), LogCountForLevel(LevelInfo))
+	require.Equal(t, uint64(1), LogCountForLevel(LevelDebug))
+	require.Equal(t, uint64(1), LogCountForLevel(LevelTrace))
+	require.Equal(t, uint64(100), LogCountForLevel(LevelError))
+	require.Equal(t, uint64(102), LogCountForLevelsGreaterThanorEqualTo(LevelError))
+}

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

@@ -0,0 +1,56 @@
+// 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 (
+	"sync/atomic"
+)
+
+type logCounter struct {
+	counter uint64
+}
+
+func (c *logCounter) incr() {
+	atomic.AddUint64(&c.counter, 1)
+}
+
+func (c *logCounter) resetCounter() {
+	atomic.StoreUint64(&c.counter, 0)
+}
+
+func (c *logCounter) getCount() uint64 {
+	return atomic.LoadUint64(&c.counter)
+}
+
+func (c *logCounter) Write(p []byte) (n int, err error) {
+	c.incr()
+
+	return len(p), nil
+}
+
+// LogCountForLevel returns the number of log invocations for a given threshold.
+func (n *Notepad) LogCountForLevel(l Threshold) uint64 {
+	return n.logCounters[l].getCount()
+}
+
+// LogCountForLevelsGreaterThanorEqualTo returns the number of log invocations
+// greater than or equal to a given threshold.
+func (n *Notepad) LogCountForLevelsGreaterThanorEqualTo(threshold Threshold) uint64 {
+	var cnt uint64
+
+	for i := int(threshold); i < len(n.logCounters); i++ {
+		cnt += n.LogCountForLevel(Threshold(i))
+	}
+
+	return cnt
+}
+
+// ResetLogCounters resets the invocation counters for all levels.
+func (n *Notepad) ResetLogCounters() {
+	for _, np := range n.logCounters {
+		np.resetCounter()
+	}
+}

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)
+}

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

@@ -0,0 +1,41 @@
+// 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 (
+	"bytes"
+	"testing"
+
+	"github.com/stretchr/testify/require"
+)
+
+func TestNotepad(t *testing.T) {
+
+	var logHandle, outHandle bytes.Buffer
+
+	n := NewNotepad(LevelCritical, LevelError, &outHandle, &logHandle, "TestNotePad", 0)
+
+	require.Equal(t, LevelCritical, n.GetStdoutThreshold())
+	require.Equal(t, LevelError, n.GetLogThreshold())
+
+	n.DEBUG.Println("Some debug")
+	n.ERROR.Println("Some error")
+	n.CRITICAL.Println("Some critical error")
+
+	require.Contains(t, logHandle.String(), "[TestNotePad] ERROR Some error")
+	require.NotContains(t, logHandle.String(), "Some debug")
+	require.NotContains(t, outHandle.String(), "Some error")
+	require.Contains(t, outHandle.String(), "Some critical error")
+
+	require.Equal(t, n.LogCountForLevel(LevelError), uint64(1))
+	require.Equal(t, n.LogCountForLevel(LevelDebug), uint64(1))
+	require.Equal(t, n.LogCountForLevel(LevelTrace), uint64(0))
+}
+
+func TestThresholdString(t *testing.T) {
+	require.Equal(t, LevelError.String(), "ERROR")
+	require.Equal(t, LevelTrace.String(), "TRACE")
+}