Update dependencies

23 files changed, 868 insertions, 224 deletions

diff --git a/vendor/github.com/spf13/afero/basepath.go b/vendor/github.com/spf13/afero/basepath.go
index 5e4fc2e..616ff8f 100644
--- a/vendor/github.com/spf13/afero/basepath.go
+++ b/vendor/github.com/spf13/afero/basepath.go
@@ -1,7 +1,6 @@
 package afero
 
 import (
-	"errors"
 	"os"
 	"path/filepath"
 	"runtime"
@@ -9,6 +8,8 @@ import (
 	"time"
 )
 
+var _ Lstater = (*BasePathFs)(nil)
+
 // The BasePathFs restricts all operations to a given path within an Fs.
 // The given file name to the operations on this Fs will be prepended with
 // the base path before calling the base Fs.
@@ -22,6 +23,16 @@ type BasePathFs struct {
 	path   string
 }
 
+type BasePathFile struct {
+	File
+	path string
+}
+
+func (f *BasePathFile) Name() string {
+	sourcename := f.File.Name()
+	return strings.TrimPrefix(sourcename, filepath.Clean(f.path))
+}
+
 func NewBasePathFs(source Fs, path string) Fs {
 	return &BasePathFs{source: source, path: path}
 }
@@ -30,7 +41,7 @@ func NewBasePathFs(source Fs, path string) Fs {
 // else the given file with the base path prepended
 func (b *BasePathFs) RealPath(name string) (path string, err error) {
 	if err := validateBasePathName(name); err != nil {
-		return "", err
+		return name, err
 	}
 
 	bpath := filepath.Clean(b.path)
@@ -52,7 +63,7 @@ func validateBasePathName(name string) error {
 	// On Windows a common mistake would be to provide an absolute OS path
 	// We could strip out the base part, but that would not be very portable.
 	if filepath.IsAbs(name) {
-		return &os.PathError{Op: "realPath", Path: name, Err: errors.New("got a real OS path instead of a virtual")}
+		return os.ErrNotExist
 	}
 
 	return nil
@@ -111,14 +122,22 @@ func (b *BasePathFs) OpenFile(name string, flag int, mode os.FileMode) (f File,
 	if name, err = b.RealPath(name); err != nil {
 		return nil, &os.PathError{Op: "openfile", Path: name, Err: err}
 	}
-	return b.source.OpenFile(name, flag, mode)
+	sourcef, err := b.source.OpenFile(name, flag, mode)
+	if err != nil {
+		return nil, err
+	}
+	return &BasePathFile{sourcef, b.path}, nil
 }
 
 func (b *BasePathFs) Open(name string) (f File, err error) {
 	if name, err = b.RealPath(name); err != nil {
 		return nil, &os.PathError{Op: "open", Path: name, Err: err}
 	}
-	return b.source.Open(name)
+	sourcef, err := b.source.Open(name)
+	if err != nil {
+		return nil, err
+	}
+	return &BasePathFile{File: sourcef, path: b.path}, nil
 }
 
 func (b *BasePathFs) Mkdir(name string, mode os.FileMode) (err error) {
@@ -139,7 +158,23 @@ func (b *BasePathFs) Create(name string) (f File, err error) {
 	if name, err = b.RealPath(name); err != nil {
 		return nil, &os.PathError{Op: "create", Path: name, Err: err}
 	}
-	return b.source.Create(name)
+	sourcef, err := b.source.Create(name)
+	if err != nil {
+		return nil, err
+	}
+	return &BasePathFile{File: sourcef, path: b.path}, nil
+}
+
+func (b *BasePathFs) LstatIfPossible(name string) (os.FileInfo, bool, error) {
+	name, err := b.RealPath(name)
+	if err != nil {
+		return nil, false, &os.PathError{Op: "lstat", Path: name, Err: err}
+	}
+	if lstater, ok := b.source.(Lstater); ok {
+		return lstater.LstatIfPossible(name)
+	}
+	fi, err := b.source.Stat(name)
+	return fi, false, err
 }
 
 // vim: ts=4 sw=4 noexpandtab nolist syn=go
diff --git a/vendor/github.com/spf13/afero/cacheOnReadFs.go b/vendor/github.com/spf13/afero/cacheOnReadFs.go
index b026e0d..29a26c6 100644
--- a/vendor/github.com/spf13/afero/cacheOnReadFs.go
+++ b/vendor/github.com/spf13/afero/cacheOnReadFs.go
@@ -205,7 +205,7 @@ func (u *CacheOnReadFs) OpenFile(name string, flag int, perm os.FileMode) (File,
 			bfi.Close() // oops, what if O_TRUNC was set and file opening in the layer failed...?
 			return nil, err
 		}
-		return &UnionFile{base: bfi, layer: lfi}, nil
+		return &UnionFile{Base: bfi, Layer: lfi}, nil
 	}
 	return u.layer.OpenFile(name, flag, perm)
 }
@@ -251,7 +251,7 @@ func (u *CacheOnReadFs) Open(name string) (File, error) {
 	if err != nil && bfile == nil {
 		return nil, err
 	}
-	return &UnionFile{base: bfile, layer: lfile}, nil
+	return &UnionFile{Base: bfile, Layer: lfile}, nil
 }
 
 func (u *CacheOnReadFs) Mkdir(name string, perm os.FileMode) error {
@@ -286,5 +286,5 @@ func (u *CacheOnReadFs) Create(name string) (File, error) {
 		bfh.Close()
 		return nil, err
 	}
-	return &UnionFile{base: bfh, layer: lfh}, nil
+	return &UnionFile{Base: bfh, Layer: lfh}, nil
 }
diff --git a/vendor/github.com/spf13/afero/copyOnWriteFs.go b/vendor/github.com/spf13/afero/copyOnWriteFs.go
index ed692ae..9aef397 100644
--- a/vendor/github.com/spf13/afero/copyOnWriteFs.go
+++ b/vendor/github.com/spf13/afero/copyOnWriteFs.go
@@ -8,6 +8,8 @@ import (
 	"time"
 )
 
+var _ Lstater = (*CopyOnWriteFs)(nil)
+
 // The CopyOnWriteFs is a union filesystem: a read only base file system with
 // a possibly writeable layer on top. Changes to the file system will only
 // be made in the overlay: Changing an existing file in the base layer which
@@ -76,18 +78,55 @@ func (u *CopyOnWriteFs) Chmod(name string, mode os.FileMode) error {
 func (u *CopyOnWriteFs) Stat(name string) (os.FileInfo, error) {
 	fi, err := u.layer.Stat(name)
 	if err != nil {
-		origErr := err
-		if e, ok := err.(*os.PathError); ok {
-			err = e.Err
-		}
-		if err == syscall.ENOENT || err == syscall.ENOTDIR {
+		isNotExist := u.isNotExist(err)
+		if isNotExist {
 			return u.base.Stat(name)
 		}
-		return nil, origErr
+		return nil, err
 	}
 	return fi, nil
 }
 
+func (u *CopyOnWriteFs) LstatIfPossible(name string) (os.FileInfo, bool, error) {
+	llayer, ok1 := u.layer.(Lstater)
+	lbase, ok2 := u.base.(Lstater)
+
+	if ok1 {
+		fi, b, err := llayer.LstatIfPossible(name)
+		if err == nil {
+			return fi, b, nil
+		}
+
+		if !u.isNotExist(err) {
+			return nil, b, err
+		}
+	}
+
+	if ok2 {
+		fi, b, err := lbase.LstatIfPossible(name)
+		if err == nil {
+			return fi, b, nil
+		}
+		if !u.isNotExist(err) {
+			return nil, b, err
+		}
+	}
+
+	fi, err := u.Stat(name)
+
+	return fi, false, err
+}
+
+func (u *CopyOnWriteFs) isNotExist(err error) bool {
+	if e, ok := err.(*os.PathError); ok {
+		err = e.Err
+	}
+	if err == os.ErrNotExist || err == syscall.ENOENT || err == syscall.ENOTDIR {
+		return true
+	}
+	return false
+}
+
 // Renaming files present only in the base layer is not permitted
 func (u *CopyOnWriteFs) Rename(oldname, newname string) error {
 	b, err := u.isBaseFile(oldname)
@@ -219,7 +258,7 @@ func (u *CopyOnWriteFs) Open(name string) (File, error) {
 		return nil, fmt.Errorf("BaseErr: %v\nOverlayErr: %v", bErr, lErr)
 	}
 
-	return &UnionFile{base: bfile, layer: lfile}, nil
+	return &UnionFile{Base: bfile, Layer: lfile}, nil
 }
 
 func (u *CopyOnWriteFs) Mkdir(name string, perm os.FileMode) error {
diff --git a/vendor/github.com/spf13/afero/lstater.go b/vendor/github.com/spf13/afero/lstater.go
new file mode 100644
index 0000000..89c1bfc
--- /dev/null
+++ b/vendor/github.com/spf13/afero/lstater.go
@@ -0,0 +1,27 @@
+// Copyright © 2018 Steve Francia <spf@spf13.com>.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package afero
+
+import (
+	"os"
+)
+
+// Lstater is an optional interface in Afero. It is only implemented by the
+// filesystems saying so.
+// It will call Lstat if the filesystem iself is, or it delegates to, the os filesystem.
+// Else it will call Stat.
+// In addtion to the FileInfo, it will return a boolean telling whether Lstat was called or not.
+type Lstater interface {
+	LstatIfPossible(name string) (os.FileInfo, bool, error)
+}
diff --git a/vendor/github.com/spf13/afero/match.go b/vendor/github.com/spf13/afero/match.go
index 08b3b7e..c18a87f 100644
--- a/vendor/github.com/spf13/afero/match.go
+++ b/vendor/github.com/spf13/afero/match.go
@@ -33,8 +33,8 @@ import (
 // built-ins from that package.
 func Glob(fs Fs, pattern string) (matches []string, err error) {
 	if !hasMeta(pattern) {
-		// afero does not support Lstat directly.
-		if _, err = lstatIfOs(fs, pattern); err != nil {
+		// Lstat not supported by a ll filesystems.
+		if _, err = lstatIfPossible(fs, pattern); err != nil {
 			return nil, nil
 		}
 		return []string{pattern}, nil
diff --git a/vendor/github.com/spf13/afero/mem/file.go b/vendor/github.com/spf13/afero/mem/file.go
index 5401a3b..7af2fb5 100644
--- a/vendor/github.com/spf13/afero/mem/file.go
+++ b/vendor/github.com/spf13/afero/mem/file.go
@@ -131,6 +131,9 @@ func (f *File) Sync() error {
 }
 
 func (f *File) Readdir(count int) (res []os.FileInfo, err error) {
+	if !f.fileData.dir {
+		return nil, &os.PathError{Op: "readdir", Path: f.fileData.name, Err: errors.New("not a dir")}
+	}
 	var outLength int64
 
 	f.fileData.Lock()
@@ -176,6 +179,9 @@ func (f *File) Read(b []byte) (n int, err error) {
 	if len(b) > 0 && int(f.at) == len(f.fileData.data) {
 		return 0, io.EOF
 	}
+	if int(f.at) > len(f.fileData.data) {
+		return 0, io.ErrUnexpectedEOF
+	}
 	if len(f.fileData.data)-int(f.at) >= len(b) {
 		n = len(b)
 	} else {
diff --git a/vendor/github.com/spf13/afero/os.go b/vendor/github.com/spf13/afero/os.go
index 6b8bce1..13cc1b8 100644
--- a/vendor/github.com/spf13/afero/os.go
+++ b/vendor/github.com/spf13/afero/os.go
@@ -19,6 +19,8 @@ import (
 	"time"
 )
 
+var _ Lstater = (*OsFs)(nil)
+
 // OsFs is a Fs implementation that uses functions provided by the os package.
 //
 // For details in any method, check the documentation of the os package
@@ -92,3 +94,8 @@ func (OsFs) Chmod(name string, mode os.FileMode) error {
 func (OsFs) Chtimes(name string, atime time.Time, mtime time.Time) error {
 	return os.Chtimes(name, atime, mtime)
 }
+
+func (OsFs) LstatIfPossible(name string) (os.FileInfo, bool, error) {
+	fi, err := os.Lstat(name)
+	return fi, true, err
+}
diff --git a/vendor/github.com/spf13/afero/path.go b/vendor/github.com/spf13/afero/path.go
index 1d90e46..18f60a0 100644
--- a/vendor/github.com/spf13/afero/path.go
+++ b/vendor/github.com/spf13/afero/path.go
@@ -60,7 +60,7 @@ func walk(fs Fs, path string, info os.FileInfo, walkFn filepath.WalkFunc) error
 
 	for _, name := range names {
 		filename := filepath.Join(path, name)
-		fileInfo, err := lstatIfOs(fs, filename)
+		fileInfo, err := lstatIfPossible(fs, filename)
 		if err != nil {
 			if err := walkFn(filename, fileInfo, err); err != nil && err != filepath.SkipDir {
 				return err
@@ -77,15 +77,13 @@ func walk(fs Fs, path string, info os.FileInfo, walkFn filepath.WalkFunc) error
 	return nil
 }
 
-// if the filesystem is OsFs use Lstat, else use fs.Stat
-func lstatIfOs(fs Fs, path string) (info os.FileInfo, err error) {
-	_, ok := fs.(*OsFs)
-	if ok {
-		info, err = os.Lstat(path)
-	} else {
-		info, err = fs.Stat(path)
+// if the filesystem supports it, use Lstat, else use fs.Stat
+func lstatIfPossible(fs Fs, path string) (os.FileInfo, error) {
+	if lfs, ok := fs.(Lstater); ok {
+		fi, _, err := lfs.LstatIfPossible(path)
+		return fi, err
 	}
-	return
+	return fs.Stat(path)
 }
 
 // Walk walks the file tree rooted at root, calling walkFn for each file or
@@ -100,7 +98,7 @@ func (a Afero) Walk(root string, walkFn filepath.WalkFunc) error {
 }
 
 func Walk(fs Fs, root string, walkFn filepath.WalkFunc) error {
-	info, err := lstatIfOs(fs, root)
+	info, err := lstatIfPossible(fs, root)
 	if err != nil {
 		return walkFn(root, nil, err)
 	}
diff --git a/vendor/github.com/spf13/afero/readonlyfs.go b/vendor/github.com/spf13/afero/readonlyfs.go
index f1fa55b..c6376ec 100644
--- a/vendor/github.com/spf13/afero/readonlyfs.go
+++ b/vendor/github.com/spf13/afero/readonlyfs.go
@@ -6,6 +6,8 @@ import (
 	"time"
 )
 
+var _ Lstater = (*ReadOnlyFs)(nil)
+
 type ReadOnlyFs struct {
 	source Fs
 }
@@ -34,6 +36,14 @@ func (r *ReadOnlyFs) Stat(name string) (os.FileInfo, error) {
 	return r.source.Stat(name)
 }
 
+func (r *ReadOnlyFs) LstatIfPossible(name string) (os.FileInfo, bool, error) {
+	if lsf, ok := r.source.(Lstater); ok {
+		return lsf.LstatIfPossible(name)
+	}
+	fi, err := r.Stat(name)
+	return fi, false, err
+}
+
 func (r *ReadOnlyFs) Rename(o, n string) error {
 	return syscall.EPERM
 }
diff --git a/vendor/github.com/spf13/afero/unionFile.go b/vendor/github.com/spf13/afero/unionFile.go
index 99f9e5d..1e78f7d 100644
--- a/vendor/github.com/spf13/afero/unionFile.go
+++ b/vendor/github.com/spf13/afero/unionFile.go
@@ -21,32 +21,33 @@ import (
 // successful read in the overlay will move the cursor position in the base layer
 // by the number of bytes read.
 type UnionFile struct {
-	base  File
-	layer File
-	off   int
-	files []os.FileInfo
+	Base   File
+	Layer  File
+	Merger DirsMerger
+	off    int
+	files  []os.FileInfo
 }
 
 func (f *UnionFile) Close() error {
 	// first close base, so we have a newer timestamp in the overlay. If we'd close
 	// the overlay first, we'd get a cacheStale the next time we access this file
 	// -> cache would be useless ;-)
-	if f.base != nil {
-		f.base.Close()
+	if f.Base != nil {
+		f.Base.Close()
 	}
-	if f.layer != nil {
-		return f.layer.Close()
+	if f.Layer != nil {
+		return f.Layer.Close()
 	}
 	return BADFD
 }
 
 func (f *UnionFile) Read(s []byte) (int, error) {
-	if f.layer != nil {
-		n, err := f.layer.Read(s)
-		if (err == nil || err == io.EOF) && f.base != nil {
+	if f.Layer != nil {
+		n, err := f.Layer.Read(s)
+		if (err == nil || err == io.EOF) && f.Base != nil {
 			// advance the file position also in the base file, the next
 			// call may be a write at this position (or a seek with SEEK_CUR)
-			if _, seekErr := f.base.Seek(int64(n), os.SEEK_CUR); seekErr != nil {
+			if _, seekErr := f.Base.Seek(int64(n), os.SEEK_CUR); seekErr != nil {
 				// only overwrite err in case the seek fails: we need to
 				// report an eventual io.EOF to the caller
 				err = seekErr
@@ -54,105 +55,135 @@ func (f *UnionFile) Read(s []byte) (int, error) {
 		}
 		return n, err
 	}
-	if f.base != nil {
-		return f.base.Read(s)
+	if f.Base != nil {
+		return f.Base.Read(s)
 	}
 	return 0, BADFD
 }
 
 func (f *UnionFile) ReadAt(s []byte, o int64) (int, error) {
-	if f.layer != nil {
-		n, err := f.layer.ReadAt(s, o)
-		if (err == nil || err == io.EOF) && f.base != nil {
-			_, err = f.base.Seek(o+int64(n), os.SEEK_SET)
+	if f.Layer != nil {
+		n, err := f.Layer.ReadAt(s, o)
+		if (err == nil || err == io.EOF) && f.Base != nil {
+			_, err = f.Base.Seek(o+int64(n), os.SEEK_SET)
 		}
 		return n, err
 	}
-	if f.base != nil {
-		return f.base.ReadAt(s, o)
+	if f.Base != nil {
+		return f.Base.ReadAt(s, o)
 	}
 	return 0, BADFD
 }
 
 func (f *UnionFile) Seek(o int64, w int) (pos int64, err error) {
-	if f.layer != nil {
-		pos, err = f.layer.Seek(o, w)
-		if (err == nil || err == io.EOF) && f.base != nil {
-			_, err = f.base.Seek(o, w)
+	if f.Layer != nil {
+		pos, err = f.Layer.Seek(o, w)
+		if (err == nil || err == io.EOF) && f.Base != nil {
+			_, err = f.Base.Seek(o, w)
 		}
 		return pos, err
 	}
-	if f.base != nil {
-		return f.base.Seek(o, w)
+	if f.Base != nil {
+		return f.Base.Seek(o, w)
 	}
 	return 0, BADFD
 }
 
 func (f *UnionFile) Write(s []byte) (n int, err error) {
-	if f.layer != nil {
-		n, err = f.layer.Write(s)
-		if err == nil && f.base != nil { // hmm, do we have fixed size files where a write may hit the EOF mark?
-			_, err = f.base.Write(s)
+	if f.Layer != nil {
+		n, err = f.Layer.Write(s)
+		if err == nil && f.Base != nil { // hmm, do we have fixed size files where a write may hit the EOF mark?
+			_, err = f.Base.Write(s)
 		}
 		return n, err
 	}
-	if f.base != nil {
-		return f.base.Write(s)
+	if f.Base != nil {
+		return f.Base.Write(s)
 	}
 	return 0, BADFD
 }
 
 func (f *UnionFile) WriteAt(s []byte, o int64) (n int, err error) {
-	if f.layer != nil {
-		n, err = f.layer.WriteAt(s, o)
-		if err == nil && f.base != nil {
-			_, err = f.base.WriteAt(s, o)
+	if f.Layer != nil {
+		n, err = f.Layer.WriteAt(s, o)
+		if err == nil && f.Base != nil {
+			_, err = f.Base.WriteAt(s, o)
 		}
 		return n, err
 	}
-	if f.base != nil {
-		return f.base.WriteAt(s, o)
+	if f.Base != nil {
+		return f.Base.WriteAt(s, o)
 	}
 	return 0, BADFD
 }
 
 func (f *UnionFile) Name() string {
-	if f.layer != nil {
-		return f.layer.Name()
+	if f.Layer != nil {
+		return f.Layer.Name()
 	}
-	return f.base.Name()
+	return f.Base.Name()
+}
+
+// DirsMerger is how UnionFile weaves two directories together.
+// It takes the FileInfo slices from the layer and the base and returns a
+// single view.
+type DirsMerger func(lofi, bofi []os.FileInfo) ([]os.FileInfo, error)
+
+var defaultUnionMergeDirsFn = func(lofi, bofi []os.FileInfo) ([]os.FileInfo, error) {
+	var files = make(map[string]os.FileInfo)
+
+	for _, fi := range lofi {
+		files[fi.Name()] = fi
+	}
+
+	for _, fi := range bofi {
+		if _, exists := files[fi.Name()]; !exists {
+			files[fi.Name()] = fi
+		}
+	}
+
+	rfi := make([]os.FileInfo, len(files))
+
+	i := 0
+	for _, fi := range files {
+		rfi[i] = fi
+		i++
+	}
+
+	return rfi, nil
+
 }
 
 // Readdir will weave the two directories together and
 // return a single view of the overlayed directories
 func (f *UnionFile) Readdir(c int) (ofi []os.FileInfo, err error) {
+	var merge DirsMerger = f.Merger
+	if merge == nil {
+		merge = defaultUnionMergeDirsFn
+	}
+
 	if f.off == 0 {
-		var files = make(map[string]os.FileInfo)
-		var rfi []os.FileInfo
-		if f.layer != nil {
-			rfi, err = f.layer.Readdir(-1)
+		var lfi []os.FileInfo
+		if f.Layer != nil {
+			lfi, err = f.Layer.Readdir(-1)
 			if err != nil {
 				return nil, err
 			}
-			for _, fi := range rfi {
-				files[fi.Name()] = fi
-			}
 		}
 
-		if f.base != nil {
-			rfi, err = f.base.Readdir(-1)
+		var bfi []os.FileInfo
+		if f.Base != nil {
+			bfi, err = f.Base.Readdir(-1)
 			if err != nil {
 				return nil, err
 			}
-			for _, fi := range rfi {
-				if _, exists := files[fi.Name()]; !exists {
-					files[fi.Name()] = fi
-				}
-			}
+
 		}
-		for _, fi := range files {
-			f.files = append(f.files, fi)
+		merged, err := merge(lfi, bfi)
+		if err != nil {
+			return nil, err
 		}
+		f.files = append(f.files, merged...)
 	}
 	if c == -1 {
 		return f.files[f.off:], nil
@@ -174,53 +205,53 @@ func (f *UnionFile) Readdirnames(c int) ([]string, error) {
 }
 
 func (f *UnionFile) Stat() (os.FileInfo, error) {
-	if f.layer != nil {
-		return f.layer.Stat()
+	if f.Layer != nil {
+		return f.Layer.Stat()
 	}
-	if f.base != nil {
-		return f.base.Stat()
+	if f.Base != nil {
+		return f.Base.Stat()
 	}
 	return nil, BADFD
 }
 
 func (f *UnionFile) Sync() (err error) {
-	if f.layer != nil {
-		err = f.layer.Sync()
-		if err == nil && f.base != nil {
-			err = f.base.Sync()
+	if f.Layer != nil {
+		err = f.Layer.Sync()
+		if err == nil && f.Base != nil {
+			err = f.Base.Sync()
 		}
 		return err
 	}
-	if f.base != nil {
-		return f.base.Sync()
+	if f.Base != nil {
+		return f.Base.Sync()
 	}
 	return BADFD
 }
 
 func (f *UnionFile) Truncate(s int64) (err error) {
-	if f.layer != nil {
-		err = f.layer.Truncate(s)
-		if err == nil && f.base != nil {
-			err = f.base.Truncate(s)
+	if f.Layer != nil {
+		err = f.Layer.Truncate(s)
+		if err == nil && f.Base != nil {
+			err = f.Base.Truncate(s)
 		}
 		return err
 	}
-	if f.base != nil {
-		return f.base.Truncate(s)
+	if f.Base != nil {
+		return f.Base.Truncate(s)
 	}
 	return BADFD
 }
 
 func (f *UnionFile) WriteString(s string) (n int, err error) {
-	if f.layer != nil {
-		n, err = f.layer.WriteString(s)
-		if err == nil && f.base != nil {
-			_, err = f.base.WriteString(s)
+	if f.Layer != nil {
+		n, err = f.Layer.WriteString(s)
+		if err == nil && f.Base != nil {
+			_, err = f.Base.WriteString(s)
 		}
 		return n, err
 	}
-	if f.base != nil {
-		return f.base.WriteString(s)
+	if f.Base != nil {
+		return f.Base.WriteString(s)
 	}
 	return 0, BADFD
 }
diff --git a/vendor/github.com/spf13/afero/util.go b/vendor/github.com/spf13/afero/util.go
index 2f44e6a..4f253f4 100644
--- a/vendor/github.com/spf13/afero/util.go
+++ b/vendor/github.com/spf13/afero/util.go
@@ -20,7 +20,6 @@ import (
 	"bytes"
 	"fmt"
 	"io"
-	"log"
 	"os"
 	"path/filepath"
 	"strings"
@@ -46,7 +45,7 @@ func WriteReader(fs Fs, path string, r io.Reader) (err error) {
 		err = fs.MkdirAll(ospath, 0777) // rwx, rw, r
 		if err != nil {
 			if err != os.ErrExist {
-				log.Panicln(err)
+				return err
 			}
 		}
 	}
@@ -157,7 +156,7 @@ func UnicodeSanitize(s string) string {
 	return string(target)
 }
 
-// Transform characters with accents into plan forms
+// Transform characters with accents into plain forms.
 func NeuterAccents(s string) string {
 	t := transform.Chain(norm.NFD, transform.RemoveFunc(isMn), norm.NFC)
 	result, _, _ := transform.String(t, string(s))
diff --git a/vendor/github.com/spf13/cast/caste.go b/vendor/github.com/spf13/cast/caste.go
index 81511fe..4fe1928 100644
--- a/vendor/github.com/spf13/cast/caste.go
+++ b/vendor/github.com/spf13/cast/caste.go
@@ -6,6 +6,7 @@
 package cast
 
 import (
+	"encoding/json"
 	"errors"
 	"fmt"
 	"html/template"
@@ -872,6 +873,9 @@ func ToStringMapStringE(i interface{}) (map[string]string, error) {
 			m[ToString(k)] = ToString(val)
 		}
 		return m, nil
+	case string:
+		err := jsonStringToObject(v, &m)
+		return m, err
 	default:
 		return m, fmt.Errorf("unable to cast %#v of type %T to map[string]string", i, i)
 	}
@@ -932,6 +936,9 @@ func ToStringMapStringSliceE(i interface{}) (map[string][]string, error) {
 			}
 			m[key] = value
 		}
+	case string:
+		err := jsonStringToObject(v, &m)
+		return m, err
 	default:
 		return m, fmt.Errorf("unable to cast %#v of type %T to map[string][]string", i, i)
 	}
@@ -955,6 +962,9 @@ func ToStringMapBoolE(i interface{}) (map[string]bool, error) {
 		return m, nil
 	case map[string]bool:
 		return v, nil
+	case string:
+		err := jsonStringToObject(v, &m)
+		return m, err
 	default:
 		return m, fmt.Errorf("unable to cast %#v of type %T to map[string]bool", i, i)
 	}
@@ -972,6 +982,9 @@ func ToStringMapE(i interface{}) (map[string]interface{}, error) {
 		return m, nil
 	case map[string]interface{}:
 		return v, nil
+	case string:
+		err := jsonStringToObject(v, &m)
+		return m, err
 	default:
 		return m, fmt.Errorf("unable to cast %#v of type %T to map[string]interface{}", i, i)
 	}
@@ -1144,3 +1157,10 @@ func parseDateWith(s string, dates []string) (d time.Time, e error) {
 	}
 	return d, fmt.Errorf("unable to parse date: %s", s)
 }
+
+// jsonStringToObject attempts to unmarshall a string as JSON into
+// the object passed as pointer.
+func jsonStringToObject(s string, v interface{}) error {
+	data := []byte(s)
+	return json.Unmarshal(data, v)
+}
diff --git a/vendor/github.com/spf13/jwalterweatherman/README.md b/vendor/github.com/spf13/jwalterweatherman/README.md
index 350a968..d8cfd27 100644
--- a/vendor/github.com/spf13/jwalterweatherman/README.md
+++ b/vendor/github.com/spf13/jwalterweatherman/README.md
@@ -144,5 +144,5 @@ 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
+I wrote this for use in [hugo](https://gohugo.io). If you are looking
 for a static website engine that’s super fast please checkout Hugo.
diff --git a/vendor/github.com/spf13/pflag/bytes.go b/vendor/github.com/spf13/pflag/bytes.go
new file mode 100644
index 0000000..12c58db
--- /dev/null
+++ b/vendor/github.com/spf13/pflag/bytes.go
@@ -0,0 +1,105 @@
+package pflag
+
+import (
+	"encoding/hex"
+	"fmt"
+	"strings"
+)
+
+// BytesHex adapts []byte for use as a flag. Value of flag is HEX encoded
+type bytesHexValue []byte
+
+func (bytesHex bytesHexValue) String() string {
+	return fmt.Sprintf("%X", []byte(bytesHex))
+}
+
+func (bytesHex *bytesHexValue) Set(value string) error {
+	bin, err := hex.DecodeString(strings.TrimSpace(value))
+
+	if err != nil {
+		return err
+	}
+
+	*bytesHex = bin
+
+	return nil
+}
+
+func (*bytesHexValue) Type() string {
+	return "bytesHex"
+}
+
+func newBytesHexValue(val []byte, p *[]byte) *bytesHexValue {
+	*p = val
+	return (*bytesHexValue)(p)
+}
+
+func bytesHexConv(sval string) (interface{}, error) {
+
+	bin, err := hex.DecodeString(sval)
+
+	if err == nil {
+		return bin, nil
+	}
+
+	return nil, fmt.Errorf("invalid string being converted to Bytes: %s %s", sval, err)
+}
+
+// GetBytesHex return the []byte value of a flag with the given name
+func (f *FlagSet) GetBytesHex(name string) ([]byte, error) {
+	val, err := f.getFlagType(name, "bytesHex", bytesHexConv)
+
+	if err != nil {
+		return []byte{}, err
+	}
+
+	return val.([]byte), nil
+}
+
+// BytesHexVar defines an []byte flag with specified name, default value, and usage string.
+// The argument p points to an []byte variable in which to store the value of the flag.
+func (f *FlagSet) BytesHexVar(p *[]byte, name string, value []byte, usage string) {
+	f.VarP(newBytesHexValue(value, p), name, "", usage)
+}
+
+// BytesHexVarP is like BytesHexVar, but accepts a shorthand letter that can be used after a single dash.
+func (f *FlagSet) BytesHexVarP(p *[]byte, name, shorthand string, value []byte, usage string) {
+	f.VarP(newBytesHexValue(value, p), name, shorthand, usage)
+}
+
+// BytesHexVar defines an []byte flag with specified name, default value, and usage string.
+// The argument p points to an []byte variable in which to store the value of the flag.
+func BytesHexVar(p *[]byte, name string, value []byte, usage string) {
+	CommandLine.VarP(newBytesHexValue(value, p), name, "", usage)
+}
+
+// BytesHexVarP is like BytesHexVar, but accepts a shorthand letter that can be used after a single dash.
+func BytesHexVarP(p *[]byte, name, shorthand string, value []byte, usage string) {
+	CommandLine.VarP(newBytesHexValue(value, p), name, shorthand, usage)
+}
+
+// BytesHex defines an []byte flag with specified name, default value, and usage string.
+// The return value is the address of an []byte variable that stores the value of the flag.
+func (f *FlagSet) BytesHex(name string, value []byte, usage string) *[]byte {
+	p := new([]byte)
+	f.BytesHexVarP(p, name, "", value, usage)
+	return p
+}
+
+// BytesHexP is like BytesHex, but accepts a shorthand letter that can be used after a single dash.
+func (f *FlagSet) BytesHexP(name, shorthand string, value []byte, usage string) *[]byte {
+	p := new([]byte)
+	f.BytesHexVarP(p, name, shorthand, value, usage)
+	return p
+}
+
+// BytesHex defines an []byte flag with specified name, default value, and usage string.
+// The return value is the address of an []byte variable that stores the value of the flag.
+func BytesHex(name string, value []byte, usage string) *[]byte {
+	return CommandLine.BytesHexP(name, "", value, usage)
+}
+
+// BytesHexP is like BytesHex, but accepts a shorthand letter that can be used after a single dash.
+func BytesHexP(name, shorthand string, value []byte, usage string) *[]byte {
+	return CommandLine.BytesHexP(name, shorthand, value, usage)
+}
diff --git a/vendor/github.com/spf13/pflag/duration_slice.go b/vendor/github.com/spf13/pflag/duration_slice.go
new file mode 100644
index 0000000..52c6b6d
--- /dev/null
+++ b/vendor/github.com/spf13/pflag/duration_slice.go
@@ -0,0 +1,128 @@
+package pflag
+
+import (
+	"fmt"
+	"strings"
+	"time"
+)
+
+// -- durationSlice Value
+type durationSliceValue struct {
+	value   *[]time.Duration
+	changed bool
+}
+
+func newDurationSliceValue(val []time.Duration, p *[]time.Duration) *durationSliceValue {
+	dsv := new(durationSliceValue)
+	dsv.value = p
+	*dsv.value = val
+	return dsv
+}
+
+func (s *durationSliceValue) Set(val string) error {
+	ss := strings.Split(val, ",")
+	out := make([]time.Duration, len(ss))
+	for i, d := range ss {
+		var err error
+		out[i], err = time.ParseDuration(d)
+		if err != nil {
+			return err
+		}
+
+	}
+	if !s.changed {
+		*s.value = out
+	} else {
+		*s.value = append(*s.value, out...)
+	}
+	s.changed = true
+	return nil
+}
+
+func (s *durationSliceValue) Type() string {
+	return "durationSlice"
+}
+
+func (s *durationSliceValue) String() string {
+	out := make([]string, len(*s.value))
+	for i, d := range *s.value {
+		out[i] = fmt.Sprintf("%s", d)
+	}
+	return "[" + strings.Join(out, ",") + "]"
+}
+
+func durationSliceConv(val string) (interface{}, error) {
+	val = strings.Trim(val, "[]")
+	// Empty string would cause a slice with one (empty) entry
+	if len(val) == 0 {
+		return []time.Duration{}, nil
+	}
+	ss := strings.Split(val, ",")
+	out := make([]time.Duration, len(ss))
+	for i, d := range ss {
+		var err error
+		out[i], err = time.ParseDuration(d)
+		if err != nil {
+			return nil, err
+		}
+
+	}
+	return out, nil
+}
+
+// GetDurationSlice returns the []time.Duration value of a flag with the given name
+func (f *FlagSet) GetDurationSlice(name string) ([]time.Duration, error) {
+	val, err := f.getFlagType(name, "durationSlice", durationSliceConv)
+	if err != nil {
+		return []time.Duration{}, err
+	}
+	return val.([]time.Duration), nil
+}
+
+// DurationSliceVar defines a durationSlice flag with specified name, default value, and usage string.
+// The argument p points to a []time.Duration variable in which to store the value of the flag.
+func (f *FlagSet) DurationSliceVar(p *[]time.Duration, name string, value []time.Duration, usage string) {
+	f.VarP(newDurationSliceValue(value, p), name, "", usage)
+}
+
+// DurationSliceVarP is like DurationSliceVar, but accepts a shorthand letter that can be used after a single dash.
+func (f *FlagSet) DurationSliceVarP(p *[]time.Duration, name, shorthand string, value []time.Duration, usage string) {
+	f.VarP(newDurationSliceValue(value, p), name, shorthand, usage)
+}
+
+// DurationSliceVar defines a duration[] flag with specified name, default value, and usage string.
+// The argument p points to a duration[] variable in which to store the value of the flag.
+func DurationSliceVar(p *[]time.Duration, name string, value []time.Duration, usage string) {
+	CommandLine.VarP(newDurationSliceValue(value, p), name, "", usage)
+}
+
+// DurationSliceVarP is like DurationSliceVar, but accepts a shorthand letter that can be used after a single dash.
+func DurationSliceVarP(p *[]time.Duration, name, shorthand string, value []time.Duration, usage string) {
+	CommandLine.VarP(newDurationSliceValue(value, p), name, shorthand, usage)
+}
+
+// DurationSlice defines a []time.Duration flag with specified name, default value, and usage string.
+// The return value is the address of a []time.Duration variable that stores the value of the flag.
+func (f *FlagSet) DurationSlice(name string, value []time.Duration, usage string) *[]time.Duration {
+	p := []time.Duration{}
+	f.DurationSliceVarP(&p, name, "", value, usage)
+	return &p
+}
+
+// DurationSliceP is like DurationSlice, but accepts a shorthand letter that can be used after a single dash.
+func (f *FlagSet) DurationSliceP(name, shorthand string, value []time.Duration, usage string) *[]time.Duration {
+	p := []time.Duration{}
+	f.DurationSliceVarP(&p, name, shorthand, value, usage)
+	return &p
+}
+
+// DurationSlice defines a []time.Duration flag with specified name, default value, and usage string.
+// The return value is the address of a []time.Duration variable that stores the value of the flag.
+func DurationSlice(name string, value []time.Duration, usage string) *[]time.Duration {
+	return CommandLine.DurationSliceP(name, "", value, usage)
+}
+
+// DurationSliceP is like DurationSlice, but accepts a shorthand letter that can be used after a single dash.
+func DurationSliceP(name, shorthand string, value []time.Duration, usage string) *[]time.Duration {
+	return CommandLine.DurationSliceP(name, shorthand, value, usage)
+}
diff --git a/vendor/github.com/spf13/pflag/flag.go b/vendor/github.com/spf13/pflag/flag.go
index 187e4c9..5cc710c 100644
--- a/vendor/github.com/spf13/pflag/flag.go
+++ b/vendor/github.com/spf13/pflag/flag.go
@@ -101,6 +101,7 @@ package pflag
 import (
 	"bytes"
 	"errors"
+	goflag "flag"
 	"fmt"
 	"io"
 	"os"
@@ -123,6 +124,12 @@ const (
 	PanicOnError
 )
 
+// ParseErrorsWhitelist defines the parsing errors that can be ignored
+type ParseErrorsWhitelist struct {
+	// UnknownFlags will ignore unknown flags errors and continue parsing rest of the flags
+	UnknownFlags bool
+}
+
 // NormalizedName is a flag name that has been normalized according to rules
 // for the FlagSet (e.g. making '-' and '_' equivalent).
 type NormalizedName string
@@ -138,6 +145,9 @@ type FlagSet struct {
 	// help/usage messages.
 	SortFlags bool
 
+	// ParseErrorsWhitelist is used to configure a whitelist of errors
+	ParseErrorsWhitelist ParseErrorsWhitelist
+
 	name              string
 	parsed            bool
 	actual            map[NormalizedName]*Flag
@@ -153,6 +163,8 @@ type FlagSet struct {
 	output            io.Writer // nil means stderr; use out() accessor
 	interspersed      bool      // allow interspersed option/non-option args
 	normalizeNameFunc func(f *FlagSet, name string) NormalizedName
+
+	addedGoFlagSets []*goflag.FlagSet
 }
 
 // A Flag represents the state of a flag.
@@ -267,16 +279,16 @@ func (f *FlagSet) VisitAll(fn func(*Flag)) {
 	}
 }
 
-// HasFlags returns a bool to indicate if the FlagSet has any flags definied.
+// HasFlags returns a bool to indicate if the FlagSet has any flags defined.
 func (f *FlagSet) HasFlags() bool {
 	return len(f.formal) > 0
 }
 
 // HasAvailableFlags returns a bool to indicate if the FlagSet has any flags
-// definied that are not hidden or deprecated.
+// that are not hidden.
 func (f *FlagSet) HasAvailableFlags() bool {
 	for _, flag := range f.formal {
-		if !flag.Hidden && len(flag.Deprecated) == 0 {
+		if !flag.Hidden {
 			return true
 		}
 	}
@@ -386,6 +398,7 @@ func (f *FlagSet) MarkDeprecated(name string, usageMessage string) error {
 		return fmt.Errorf("deprecated message for flag %q must be set", name)
 	}
 	flag.Deprecated = usageMessage
+	flag.Hidden = true
 	return nil
 }
 
@@ -568,6 +581,10 @@ func UnquoteUsage(flag *Flag) (name string, usage string) {
 		name = "strings"
 	case "intSlice":
 		name = "ints"
+	case "uintSlice":
+		name = "uints"
+	case "boolSlice":
+		name = "bools"
 	}
 
 	return
@@ -582,11 +599,14 @@ func wrapN(i, slop int, s string) (string, string) {
 		return s, ""
 	}
 
-	w := strings.LastIndexAny(s[:i], " \t")
+	w := strings.LastIndexAny(s[:i], " \t\n")
 	if w <= 0 {
 		return s, ""
 	}
-
+	nlPos := strings.LastIndex(s[:i], "\n")
+	if nlPos > 0 && nlPos < w {
+		return s[:nlPos], s[nlPos+1:]
+	}
 	return s[:w], s[w+1:]
 }
 
@@ -595,7 +615,7 @@ func wrapN(i, slop int, s string) (string, string) {
 // caller). Pass `w` == 0 to do no wrapping
 func wrap(i, w int, s string) string {
 	if w == 0 {
-		return s
+		return strings.Replace(s, "\n", "\n"+strings.Repeat(" ", i), -1)
 	}
 
 	// space between indent i and end of line width w into which
@@ -613,7 +633,7 @@ func wrap(i, w int, s string) string {
 	}
 	// If still not enough space then don't even try to wrap.
 	if wrap < 24 {
-		return s
+		return strings.Replace(s, "\n", r, -1)
 	}
 
 	// Try to avoid short orphan words on the final line, by
@@ -625,14 +645,14 @@ func wrap(i, w int, s string) string {
 	// Handle first line, which is indented by the caller (or the
 	// special case above)
 	l, s = wrapN(wrap, slop, s)
-	r = r + l
+	r = r + strings.Replace(l, "\n", "\n"+strings.Repeat(" ", i), -1)
 
 	// Now wrap the rest
 	for s != "" {
 		var t string
 
 		t, s = wrapN(wrap, slop, s)
-		r = r + "\n" + strings.Repeat(" ", i) + t
+		r = r + "\n" + strings.Repeat(" ", i) + strings.Replace(t, "\n", "\n"+strings.Repeat(" ", i), -1)
 	}
 
 	return r
@@ -649,7 +669,7 @@ func (f *FlagSet) FlagUsagesWrapped(cols int) string {
 
 	maxlen := 0
 	f.VisitAll(func(flag *Flag) {
-		if flag.Deprecated != "" || flag.Hidden {
+		if flag.Hidden {
 			return
 		}
 
@@ -696,6 +716,9 @@ func (f *FlagSet) FlagUsagesWrapped(cols int) string {
 				line += fmt.Sprintf(" (default %s)", flag.DefValue)
 			}
 		}
+		if len(flag.Deprecated) != 0 {
+			line += fmt.Sprintf(" (DEPRECATED: %s)", flag.Deprecated)
+		}
 
 		lines = append(lines, line)
 	})
@@ -873,8 +896,10 @@ func VarP(value Value, name, shorthand, usage string) {
 // returns the error.
 func (f *FlagSet) failf(format string, a ...interface{}) error {
 	err := fmt.Errorf(format, a...)
-	fmt.Fprintln(f.out(), err)
-	f.usage()
+	if f.errorHandling != ContinueOnError {
+		fmt.Fprintln(f.out(), err)
+		f.usage()
+	}
 	return err
 }
 
@@ -890,6 +915,25 @@ func (f *FlagSet) usage() {
 	}
 }
 
+//--unknown (args will be empty)
+//--unknown --next-flag ... (args will be --next-flag ...)
+//--unknown arg ... (args will be arg ...)
+func stripUnknownFlagValue(args []string) []string {
+	if len(args) == 0 {
+		//--unknown
+		return args
+	}
+
+	first := args[0]
+	if first[0] == '-' {
+		//--unknown --next-flag ...
+		return args
+	}
+
+	//--unknown arg ... (args will be arg ...)
+	return args[1:]
+}
+
 func (f *FlagSet) parseLongArg(s string, args []string, fn parseFunc) (a []string, err error) {
 	a = args
 	name := s[2:]
@@ -901,13 +945,24 @@ func (f *FlagSet) parseLongArg(s string, args []string, fn parseFunc) (a []strin
 	split := strings.SplitN(name, "=", 2)
 	name = split[0]
 	flag, exists := f.formal[f.normalizeFlagName(name)]
+
 	if !exists {
-		if name == "help" { // special case for nice help message.
+		switch {
+		case name == "help":
 			f.usage()
 			return a, ErrHelp
+		case f.ParseErrorsWhitelist.UnknownFlags:
+			// --unknown=unknownval arg ...
+			// we do not want to lose arg in this case
+			if len(split) >= 2 {
+				return a, nil
+			}
+
+			return stripUnknownFlagValue(a), nil
+		default:
+			err = f.failf("unknown flag: --%s", name)
+			return
 		}
-		err = f.failf("unknown flag: --%s", name)
-		return
 	}
 
 	var value string
@@ -935,23 +990,36 @@ func (f *FlagSet) parseLongArg(s string, args []string, fn parseFunc) (a []strin
 }
 
 func (f *FlagSet) parseSingleShortArg(shorthands string, args []string, fn parseFunc) (outShorts string, outArgs []string, err error) {
+	outArgs = args
+
 	if strings.HasPrefix(shorthands, "test.") {
 		return
 	}
 
-	outArgs = args
 	outShorts = shorthands[1:]
 	c := shorthands[0]
 
 	flag, exists := f.shorthands[c]
 	if !exists {
-		if c == 'h' { // special case for nice help message.
+		switch {
+		case c == 'h':
 			f.usage()
 			err = ErrHelp
 			return
+		case f.ParseErrorsWhitelist.UnknownFlags:
+			// '-f=arg arg ...'
+			// we do not want to lose arg in this case
+			if len(shorthands) > 2 && shorthands[1] == '=' {
+				outShorts = ""
+				return
+			}
+
+			outArgs = stripUnknownFlagValue(outArgs)
+			return
+		default:
+			err = f.failf("unknown shorthand flag: %q in -%s", c, shorthands)
+			return
 		}
-		err = f.failf("unknown shorthand flag: %q in -%s", c, shorthands)
-		return
 	}
 
 	var value string
@@ -1038,6 +1106,11 @@ func (f *FlagSet) parseArgs(args []string, fn parseFunc) (err error) {
 // are defined and before flags are accessed by the program.
 // The return value will be ErrHelp if -help was set but not defined.
 func (f *FlagSet) Parse(arguments []string) error {
+	if f.addedGoFlagSets != nil {
+		for _, goFlagSet := range f.addedGoFlagSets {
+			goFlagSet.Parse(nil)
+		}
+	}
 	f.parsed = true
 
 	if len(arguments) < 0 {
@@ -1056,6 +1129,7 @@ func (f *FlagSet) Parse(arguments []string) error {
 		case ContinueOnError:
 			return err
 		case ExitOnError:
+			fmt.Println(err)
 			os.Exit(2)
 		case PanicOnError:
 			panic(err)
diff --git a/vendor/github.com/spf13/pflag/golangflag.go b/vendor/github.com/spf13/pflag/golangflag.go
index c4f47eb..d3dd72b 100644
--- a/vendor/github.com/spf13/pflag/golangflag.go
+++ b/vendor/github.com/spf13/pflag/golangflag.go
@@ -98,4 +98,8 @@ func (f *FlagSet) AddGoFlagSet(newSet *goflag.FlagSet) {
 	newSet.VisitAll(func(goflag *goflag.Flag) {
 		f.AddGoFlag(goflag)
 	})
+	if f.addedGoFlagSets == nil {
+		f.addedGoFlagSets = make([]*goflag.FlagSet, 0)
+	}
+	f.addedGoFlagSets = append(f.addedGoFlagSets, newSet)
 }
diff --git a/vendor/github.com/spf13/pflag/string_array.go b/vendor/github.com/spf13/pflag/string_array.go
index 276b7ed..fa7bc60 100644
--- a/vendor/github.com/spf13/pflag/string_array.go
+++ b/vendor/github.com/spf13/pflag/string_array.go
@@ -52,7 +52,7 @@ func (f *FlagSet) GetStringArray(name string) ([]string, error) {
 
 // StringArrayVar defines a string flag with specified name, default value, and usage string.
 // The argument p points to a []string variable in which to store the values of the multiple flags.
-// The value of each argument will not try to be separated by comma
+// The value of each argument will not try to be separated by comma. Use a StringSlice for that.
 func (f *FlagSet) StringArrayVar(p *[]string, name string, value []string, usage string) {
 	f.VarP(newStringArrayValue(value, p), name, "", usage)
 }
@@ -64,7 +64,7 @@ func (f *FlagSet) StringArrayVarP(p *[]string, name, shorthand string, value []s
 
 // StringArrayVar defines a string flag with specified name, default value, and usage string.
 // The argument p points to a []string variable in which to store the value of the flag.
-// The value of each argument will not try to be separated by comma
+// The value of each argument will not try to be separated by comma. Use a StringSlice for that.
 func StringArrayVar(p *[]string, name string, value []string, usage string) {
 	CommandLine.VarP(newStringArrayValue(value, p), name, "", usage)
 }
@@ -76,7 +76,7 @@ func StringArrayVarP(p *[]string, name, shorthand string, value []string, usage
 
 // StringArray defines a string flag with specified name, default value, and usage string.
 // The return value is the address of a []string variable that stores the value of the flag.
-// The value of each argument will not try to be separated by comma
+// The value of each argument will not try to be separated by comma. Use a StringSlice for that.
 func (f *FlagSet) StringArray(name string, value []string, usage string) *[]string {
 	p := []string{}
 	f.StringArrayVarP(&p, name, "", value, usage)
@@ -92,7 +92,7 @@ func (f *FlagSet) StringArrayP(name, shorthand string, value []string, usage str
 
 // StringArray defines a string flag with specified name, default value, and usage string.
 // The return value is the address of a []string variable that stores the value of the flag.
-// The value of each argument will not try to be separated by comma
+// The value of each argument will not try to be separated by comma. Use a StringSlice for that.
 func StringArray(name string, value []string, usage string) *[]string {
 	return CommandLine.StringArrayP(name, "", value, usage)
 }
diff --git a/vendor/github.com/spf13/pflag/string_slice.go b/vendor/github.com/spf13/pflag/string_slice.go
index 05eee75..0cd3ccc 100644
--- a/vendor/github.com/spf13/pflag/string_slice.go
+++ b/vendor/github.com/spf13/pflag/string_slice.go
@@ -82,6 +82,11 @@ func (f *FlagSet) GetStringSlice(name string) ([]string, error) {
 
 // StringSliceVar defines a string flag with specified name, default value, and usage string.
 // The argument p points to a []string variable in which to store the value of the flag.
+// Compared to StringArray flags, StringSlice flags take comma-separated value as arguments and split them accordingly.
+// For example:
+//   --ss="v1,v2" -ss="v3"
+// will result in
+//   []string{"v1", "v2", "v3"}
 func (f *FlagSet) StringSliceVar(p *[]string, name string, value []string, usage string) {
 	f.VarP(newStringSliceValue(value, p), name, "", usage)
 }
@@ -93,6 +98,11 @@ func (f *FlagSet) StringSliceVarP(p *[]string, name, shorthand string, value []s
 
 // StringSliceVar defines a string flag with specified name, default value, and usage string.
 // The argument p points to a []string variable in which to store the value of the flag.
+// Compared to StringArray flags, StringSlice flags take comma-separated value as arguments and split them accordingly.
+// For example:
+//   --ss="v1,v2" -ss="v3"
+// will result in
+//   []string{"v1", "v2", "v3"}
 func StringSliceVar(p *[]string, name string, value []string, usage string) {
 	CommandLine.VarP(newStringSliceValue(value, p), name, "", usage)
 }
@@ -104,6 +114,11 @@ func StringSliceVarP(p *[]string, name, shorthand string, value []string, usage
 
 // StringSlice defines a string flag with specified name, default value, and usage string.
 // The return value is the address of a []string variable that stores the value of the flag.
+// Compared to StringArray flags, StringSlice flags take comma-separated value as arguments and split them accordingly.
+// For example:
+//   --ss="v1,v2" -ss="v3"
+// will result in
+//   []string{"v1", "v2", "v3"}
 func (f *FlagSet) StringSlice(name string, value []string, usage string) *[]string {
 	p := []string{}
 	f.StringSliceVarP(&p, name, "", value, usage)
@@ -119,6 +134,11 @@ func (f *FlagSet) StringSliceP(name, shorthand string, value []string, usage str
 
 // StringSlice defines a string flag with specified name, default value, and usage string.
 // The return value is the address of a []string variable that stores the value of the flag.
+// Compared to StringArray flags, StringSlice flags take comma-separated value as arguments and split them accordingly.
+// For example:
+//   --ss="v1,v2" -ss="v3"
+// will result in
+//   []string{"v1", "v2", "v3"}
 func StringSlice(name string, value []string, usage string) *[]string {
 	return CommandLine.StringSliceP(name, "", value, usage)
 }
diff --git a/vendor/github.com/spf13/viper/README.md b/vendor/github.com/spf13/viper/README.md
index 848d92d..64bf474 100644
--- a/vendor/github.com/spf13/viper/README.md
+++ b/vendor/github.com/spf13/viper/README.md
@@ -185,7 +185,7 @@ with ENV:
  * `AutomaticEnv()`
  * `BindEnv(string...) : error`
  * `SetEnvPrefix(string)`
- * `SetEnvReplacer(string...) *strings.Replacer`
+ * `SetEnvKeyReplacer(string...) *strings.Replacer`
 
 _When working with ENV variables, it’s important to recognize that Viper
 treats ENV variables as case sensitive._
@@ -212,7 +212,7 @@ time a `viper.Get` request is made. It will apply the following rules. It will
 check for a environment variable with a name matching the key uppercased and
 prefixed with the `EnvPrefix` if set.
 
-`SetEnvReplacer` allows you to use a `strings.Replacer` object to rewrite Env
+`SetEnvKeyReplacer` allows you to use a `strings.Replacer` object to rewrite Env
 keys to an extent. This is useful if you want to use `-` or something in your
 `Get()` calls, but want your environmental variables to use `_` delimiters. An
 example of using it can be found in `viper_test.go`.
diff --git a/vendor/github.com/spf13/viper/nohup.out b/vendor/github.com/spf13/viper/nohup.out
deleted file mode 100644
index 8973bf2..0000000
--- a/vendor/github.com/spf13/viper/nohup.out
+++ /dev/null
@@ -1 +0,0 @@
-QProcess::start: Process is already running
diff --git a/vendor/github.com/spf13/viper/util.go b/vendor/github.com/spf13/viper/util.go
index 3ebada9..952cad4 100644
--- a/vendor/github.com/spf13/viper/util.go
+++ b/vendor/github.com/spf13/viper/util.go
@@ -11,22 +11,16 @@
 package viper
 
 import (
-	"bytes"
-	"encoding/json"
 	"fmt"
-	"io"
 	"os"
 	"path/filepath"
 	"runtime"
 	"strings"
 	"unicode"
 
-	"github.com/hashicorp/hcl"
-	"github.com/magiconair/properties"
-	toml "github.com/pelletier/go-toml"
+	"github.com/spf13/afero"
 	"github.com/spf13/cast"
 	jww "github.com/spf13/jwalterweatherman"
-	"gopkg.in/yaml.v2"
 )
 
 // ConfigParseError denotes failing to parse configuration file.
@@ -121,8 +115,8 @@ func absPathify(inPath string) string {
 }
 
 // Check if File / Directory Exists
-func exists(path string) (bool, error) {
-	_, err := v.fs.Stat(path)
+func exists(fs afero.Fs, path string) (bool, error) {
+	_, err := fs.Stat(path)
 	if err == nil {
 		return true, nil
 	}
@@ -152,61 +146,6 @@ func userHomeDir() string {
 	return os.Getenv("HOME")
 }
 
-func unmarshallConfigReader(in io.Reader, c map[string]interface{}, configType string) error {
-	buf := new(bytes.Buffer)
-	buf.ReadFrom(in)
-
-	switch strings.ToLower(configType) {
-	case "yaml", "yml":
-		if err := yaml.Unmarshal(buf.Bytes(), &c); err != nil {
-			return ConfigParseError{err}
-		}
-
-	case "json":
-		if err := json.Unmarshal(buf.Bytes(), &c); err != nil {
-			return ConfigParseError{err}
-		}
-
-	case "hcl":
-		obj, err := hcl.Parse(string(buf.Bytes()))
-		if err != nil {
-			return ConfigParseError{err}
-		}
-		if err = hcl.DecodeObject(&c, obj); err != nil {
-			return ConfigParseError{err}
-		}
-
-	case "toml":
-		tree, err := toml.LoadReader(buf)
-		if err != nil {
-			return ConfigParseError{err}
-		}
-		tmap := tree.ToMap()
-		for k, v := range tmap {
-			c[k] = v
-		}
-
-	case "properties", "props", "prop":
-		var p *properties.Properties
-		var err error
-		if p, err = properties.Load(buf.Bytes(), properties.UTF8); err != nil {
-			return ConfigParseError{err}
-		}
-		for _, key := range p.Keys() {
-			value, _ := p.Get(key)
-			// recursively build nested maps
-			path := strings.Split(key, ".")
-			lastKey := strings.ToLower(path[len(path)-1])
-			deepestMap := deepSearch(c, path[0:len(path)-1])
-			// set innermost value
-			deepestMap[lastKey] = value
-		}
-	}
-
-	insensitiviseMap(c)
-	return nil
-}
-
 func safeMul(a, b uint) uint {
 	c := a * b
 	if a > 1 && b > 1 && c/b != a {
diff --git a/vendor/github.com/spf13/viper/viper.go b/vendor/github.com/spf13/viper/viper.go
index 963861a..907a102 100644
--- a/vendor/github.com/spf13/viper/viper.go
+++ b/vendor/github.com/spf13/viper/viper.go
@@ -22,6 +22,7 @@ package viper
 import (
 	"bytes"
 	"encoding/csv"
+	"encoding/json"
 	"fmt"
 	"io"
 	"log"
@@ -31,14 +32,30 @@ import (
 	"strings"
 	"time"
 
+	yaml "gopkg.in/yaml.v2"
+
 	"github.com/fsnotify/fsnotify"
+	"github.com/hashicorp/hcl"
+	"github.com/hashicorp/hcl/hcl/printer"
+	"github.com/magiconair/properties"
 	"github.com/mitchellh/mapstructure"
+	toml "github.com/pelletier/go-toml"
 	"github.com/spf13/afero"
 	"github.com/spf13/cast"
 	jww "github.com/spf13/jwalterweatherman"
 	"github.com/spf13/pflag"
 )
 
+// ConfigMarshalError happens when failing to marshal the configuration.
+type ConfigMarshalError struct {
+	err error
+}
+
+// Error returns the formatted configuration error.
+func (e ConfigMarshalError) Error() string {
+	return fmt.Sprintf("While marshaling config: %s", e.err.Error())
+}
+
 var v *Viper
 
 type RemoteResponse struct {
@@ -162,6 +179,10 @@ type Viper struct {
 	aliases        map[string]string
 	typeByDefValue bool
 
+	// Store read properties on the object so that we can write back in order with comments.
+	// This will only be used if the configuration read is a properties file.
+	properties *properties.Properties
+
 	onConfigChange func(fsnotify.Event)
 }
 
@@ -188,7 +209,7 @@ func New() *Viper {
 // can use it in their testing as well.
 func Reset() {
 	v = New()
-	SupportedExts = []string{"json", "toml", "yaml", "yml", "hcl"}
+	SupportedExts = []string{"json", "toml", "yaml", "yml", "properties", "props", "prop", "hcl"}
 	SupportedRemoteProviders = []string{"etcd", "consul"}
 }
 
@@ -661,6 +682,12 @@ func (v *Viper) GetInt(key string) int {
 	return cast.ToInt(v.Get(key))
 }
 
+// GetInt32 returns the value associated with the key as an integer.
+func GetInt32(key string) int32 { return v.GetInt32(key) }
+func (v *Viper) GetInt32(key string) int32 {
+	return cast.ToInt32(v.Get(key))
+}
+
 // GetInt64 returns the value associated with the key as an integer.
 func GetInt64(key string) int64 { return v.GetInt64(key) }
 func (v *Viper) GetInt64(key string) int64 {
@@ -1119,6 +1146,7 @@ func (v *Viper) ReadInConfig() error {
 		return UnsupportedConfigError(v.getConfigType())
 	}
 
+	jww.DEBUG.Println("Reading file: ", filename)
 	file, err := afero.ReadFile(v.fs, filename)
 	if err != nil {
 		return err
@@ -1178,6 +1206,195 @@ func (v *Viper) MergeConfig(in io.Reader) error {
 	return nil
 }
 
+// WriteConfig writes the current configuration to a file.
+func WriteConfig() error { return v.WriteConfig() }
+func (v *Viper) WriteConfig() error {
+	filename, err := v.getConfigFile()
+	if err != nil {
+		return err
+	}
+	return v.writeConfig(filename, true)
+}
+
+// SafeWriteConfig writes current configuration to file only if the file does not exist.
+func SafeWriteConfig() error { return v.SafeWriteConfig() }
+func (v *Viper) SafeWriteConfig() error {
+	filename, err := v.getConfigFile()
+	if err != nil {
+		return err
+	}
+	return v.writeConfig(filename, false)
+}
+
+// WriteConfigAs writes current configuration to a given filename.
+func WriteConfigAs(filename string) error { return v.WriteConfigAs(filename) }
+func (v *Viper) WriteConfigAs(filename string) error {
+	return v.writeConfig(filename, true)
+}
+
+// SafeWriteConfigAs writes current configuration to a given filename if it does not exist.
+func SafeWriteConfigAs(filename string) error { return v.SafeWriteConfigAs(filename) }
+func (v *Viper) SafeWriteConfigAs(filename string) error {
+	return v.writeConfig(filename, false)
+}
+
+func writeConfig(filename string, force bool) error { return v.writeConfig(filename, force) }
+func (v *Viper) writeConfig(filename string, force bool) error {
+	jww.INFO.Println("Attempting to write configuration to file.")
+	ext := filepath.Ext(filename)
+	if len(ext) <= 1 {
+		return fmt.Errorf("Filename: %s requires valid extension.", filename)
+	}
+	configType := ext[1:]
+	if !stringInSlice(configType, SupportedExts) {
+		return UnsupportedConfigError(configType)
+	}
+	if v.config == nil {
+		v.config = make(map[string]interface{})
+	}
+	var flags int
+	if force == true {
+		flags = os.O_CREATE | os.O_TRUNC | os.O_WRONLY
+	} else {
+		if _, err := os.Stat(filename); os.IsNotExist(err) {
+			flags = os.O_WRONLY
+		} else {
+			return fmt.Errorf("File: %s exists. Use WriteConfig to overwrite.", filename)
+		}
+	}
+	f, err := v.fs.OpenFile(filename, flags, os.FileMode(0644))
+	if err != nil {
+		return err
+	}
+	return v.marshalWriter(f, configType)
+}
+
+// Unmarshal a Reader into a map.
+// Should probably be an unexported function.
+func unmarshalReader(in io.Reader, c map[string]interface{}) error {
+	return v.unmarshalReader(in, c)
+}
+func (v *Viper) unmarshalReader(in io.Reader, c map[string]interface{}) error {
+	buf := new(bytes.Buffer)
+	buf.ReadFrom(in)
+
+	switch strings.ToLower(v.getConfigType()) {
+	case "yaml", "yml":
+		if err := yaml.Unmarshal(buf.Bytes(), &c); err != nil {
+			return ConfigParseError{err}
+		}
+
+	case "json":
+		if err := json.Unmarshal(buf.Bytes(), &c); err != nil {
+			return ConfigParseError{err}
+		}
+
+	case "hcl":
+		obj, err := hcl.Parse(string(buf.Bytes()))
+		if err != nil {
+			return ConfigParseError{err}
+		}
+		if err = hcl.DecodeObject(&c, obj); err != nil {
+			return ConfigParseError{err}
+		}
+
+	case "toml":
+		tree, err := toml.LoadReader(buf)
+		if err != nil {
+			return ConfigParseError{err}
+		}
+		tmap := tree.ToMap()
+		for k, v := range tmap {
+			c[k] = v
+		}
+
+	case "properties", "props", "prop":
+		v.properties = properties.NewProperties()
+		var err error
+		if v.properties, err = properties.Load(buf.Bytes(), properties.UTF8); err != nil {
+			return ConfigParseError{err}
+		}
+		for _, key := range v.properties.Keys() {
+			value, _ := v.properties.Get(key)
+			// recursively build nested maps
+			path := strings.Split(key, ".")
+			lastKey := strings.ToLower(path[len(path)-1])
+			deepestMap := deepSearch(c, path[0:len(path)-1])
+			// set innermost value
+			deepestMap[lastKey] = value
+		}
+	}
+
+	insensitiviseMap(c)
+	return nil
+}
+
+// Marshal a map into Writer.
+func marshalWriter(f afero.File, configType string) error {
+	return v.marshalWriter(f, configType)
+}
+func (v *Viper) marshalWriter(f afero.File, configType string) error {
+	c := v.AllSettings()
+	switch configType {
+	case "json":
+		b, err := json.MarshalIndent(c, "", "  ")
+		if err != nil {
+			return ConfigMarshalError{err}
+		}
+		_, err = f.WriteString(string(b))
+		if err != nil {
+			return ConfigMarshalError{err}
+		}
+
+	case "hcl":
+		b, err := json.Marshal(c)
+		ast, err := hcl.Parse(string(b))
+		if err != nil {
+			return ConfigMarshalError{err}
+		}
+		err = printer.Fprint(f, ast.Node)
+		if err != nil {
+			return ConfigMarshalError{err}
+		}
+
+	case "prop", "props", "properties":
+		if v.properties == nil {
+			v.properties = properties.NewProperties()
+		}
+		p := v.properties
+		for _, key := range v.AllKeys() {
+			_, _, err := p.Set(key, v.GetString(key))
+			if err != nil {
+				return ConfigMarshalError{err}
+			}
+		}
+		_, err := p.WriteComment(f, "#", properties.UTF8)
+		if err != nil {
+			return ConfigMarshalError{err}
+		}
+
+	case "toml":
+		t, err := toml.TreeFromMap(c)
+		if err != nil {
+			return ConfigMarshalError{err}
+		}
+		s := t.String()
+		if _, err := f.WriteString(s); err != nil {
+			return ConfigMarshalError{err}
+		}
+
+	case "yaml", "yml":
+		b, err := yaml.Marshal(c)
+		if err != nil {
+			return ConfigMarshalError{err}
+		}
+		if _, err = f.WriteString(string(b)); err != nil {
+			return ConfigMarshalError{err}
+		}
+	}
+	return nil
+}
+
 func keyExists(k string, m map[string]interface{}) string {
 	lk := strings.ToLower(k)
 	for mk := range m {
@@ -1290,16 +1507,6 @@ func (v *Viper) WatchRemoteConfigOnChannel() error {
 	return v.watchKeyValueConfigOnChannel()
 }
 
-// Unmarshal a Reader into a map.
-// Should probably be an unexported function.
-func unmarshalReader(in io.Reader, c map[string]interface{}) error {
-	return v.unmarshalReader(in, c)
-}
-
-func (v *Viper) unmarshalReader(in io.Reader, c map[string]interface{}) error {
-	return unmarshallConfigReader(in, c, v.getConfigType())
-}
-
 func (v *Viper) insensitiviseMaps() {
 	insensitiviseMap(v.config)
 	insensitiviseMap(v.defaults)
@@ -1519,25 +1726,21 @@ func (v *Viper) getConfigType() string {
 }
 
 func (v *Viper) getConfigFile() (string, error) {
-	// if explicitly set, then use it
-	if v.configFile != "" {
-		return v.configFile, nil
-	}
-
-	cf, err := v.findConfigFile()
-	if err != nil {
-		return "", err
+	if v.configFile == "" {
+		cf, err := v.findConfigFile()
+		if err != nil {
+			return "", err
+		}
+		v.configFile = cf
 	}
-
-	v.configFile = cf
-	return v.getConfigFile()
+	return v.configFile, nil
 }
 
 func (v *Viper) searchInPath(in string) (filename string) {
 	jww.DEBUG.Println("Searching for config in ", in)
 	for _, ext := range SupportedExts {
 		jww.DEBUG.Println("Checking for", filepath.Join(in, v.configName+"."+ext))
-		if b, _ := exists(filepath.Join(in, v.configName+"."+ext)); b {
+		if b, _ := exists(v.fs, filepath.Join(in, v.configName+"."+ext)); b {
 			jww.DEBUG.Println("Found: ", filepath.Join(in, v.configName+"."+ext))
 			return filepath.Join(in, v.configName+"."+ext)
 		}