Update go-fs.

Closes #6083

vendor/github.com/mitchellh/go-fs/fat/boot_sector.go

@@ -4,8 +4,9 @@ import (
 	"encoding/binary"
 	"errors"
 	"fmt"
-	"github.com/mitchellh/go-fs"
 	"unicode"
+
+	"github.com/mitchellh/go-fs"
 )
 
 type MediaType uint8
@@ -99,7 +100,7 @@ func (b *BootSectorCommon) Bytes() ([]byte, error) {
 
 	for i, r := range b.OEMName {
 		if r > unicode.MaxASCII {
-			return nil, fmt.Errorf("'%s' in OEM name not a valid ASCII char. Must be ASCII.", r)
+			return nil, fmt.Errorf("%#U in OEM name not a valid ASCII char. Must be ASCII.", r)
 		}
 
 		sector[0x3+i] = byte(r)
@@ -245,7 +246,7 @@ func (b *BootSectorFat16) Bytes() ([]byte, error) {
 
 	for i, r := range b.VolumeLabel {
 		if r > unicode.MaxASCII {
-			return nil, fmt.Errorf("'%s' in VolumeLabel not a valid ASCII char. Must be ASCII.", r)
+			return nil, fmt.Errorf("%#U in VolumeLabel not a valid ASCII char. Must be ASCII.", r)
 		}
 
 		sector[43+i] = byte(r)
@@ -258,7 +259,7 @@ func (b *BootSectorFat16) Bytes() ([]byte, error) {
 
 	for i, r := range b.FileSystemTypeLabel {
 		if r > unicode.MaxASCII {
-			return nil, fmt.Errorf("'%s' in FileSystemTypeLabel not a valid ASCII char. Must be ASCII.", r)
+			return nil, fmt.Errorf("%#U in FileSystemTypeLabel not a valid ASCII char. Must be ASCII.", r)
 		}
 
 		sector[54+i] = byte(r)
@@ -324,7 +325,7 @@ func (b *BootSectorFat32) Bytes() ([]byte, error) {
 
 	for i, r := range b.VolumeLabel {
 		if r > unicode.MaxASCII {
-			return nil, fmt.Errorf("'%s' in VolumeLabel not a valid ASCII char. Must be ASCII.", r)
+			return nil, fmt.Errorf("%#U in VolumeLabel not a valid ASCII char. Must be ASCII.", r)
 		}
 
 		sector[71+i] = byte(r)
@@ -337,7 +338,7 @@ func (b *BootSectorFat32) Bytes() ([]byte, error) {
 
 	for i, r := range b.FileSystemTypeLabel {
 		if r > unicode.MaxASCII {
-			return nil, fmt.Errorf("'%s' in FileSystemTypeLabel not a valid ASCII char. Must be ASCII.", r)
+			return nil, fmt.Errorf("%#U in FileSystemTypeLabel not a valid ASCII char. Must be ASCII.", r)
 		}
 
 		sector[82+i] = byte(r)

vendor/github.com/mitchellh/go-fs/fat/cluster_chain.go

@@ -1,9 +1,10 @@
 package fat
 
 import (
-	"github.com/mitchellh/go-fs"
 	"io"
 	"math"
+
+	"github.com/mitchellh/go-fs"
 )
 
 type ClusterChain struct {

vendor/github.com/mitchellh/go-fs/fat/directory.go

@@ -2,9 +2,10 @@ package fat
 
 import (
 	"fmt"
-	"github.com/mitchellh/go-fs"
 	"strings"
 	"time"
+
+	"github.com/mitchellh/go-fs"
 )
 
 // Directory implements fs.Directory and is used to interface with
@@ -16,9 +17,9 @@ type Directory struct {
 }
 
 // DirectoryEntry implements fs.DirectoryEntry and represents a single
-// file/folder within a directory in a FAT filesystem. Note that the
+// file/folder within a directory in a FAT filesystem. Note that there may be
-// underlying directory entry data structures on the disk may be more
+// more than one underlying directory entry data structure on the disk to
-// than one to accomodate for long filenames.
+// account for long filenames.
 type DirectoryEntry struct {
 	dir        *Directory
 	lfnEntries []*DirectoryClusterEntry

vendor/github.com/mitchellh/go-fs/fat/directory_cluster.go

@@ -5,11 +5,12 @@ import (
 	"encoding/binary"
 	"errors"
 	"fmt"
-	"github.com/mitchellh/go-fs"
 	"math"
 	"strings"
 	"time"
 	"unicode/utf16"
+
+	"github.com/mitchellh/go-fs"
 )
 
 type DirectoryAttr uint8
@@ -126,7 +127,7 @@ func NewDirectoryCluster(start uint32, parent uint32, t time.Time) *DirectoryClu
 
 	// Create the "." and ".." entries
 	cluster.entries = []*DirectoryClusterEntry{
-		&DirectoryClusterEntry{
+		{
 			accessTime: t,
 			attr:       AttrDirectory,
 			cluster:    start,
@@ -134,7 +135,7 @@ func NewDirectoryCluster(start uint32, parent uint32, t time.Time) *DirectoryClu
 			name:       ".",
 			writeTime:  t,
 		},
-		&DirectoryClusterEntry{
+		{
 			accessTime: t,
 			attr:       AttrDirectory,
 			cluster:    parent,

vendor/github.com/mitchellh/go-fs/fat/fat.go

@@ -3,8 +3,9 @@ package fat
 import (
 	"errors"
 	"fmt"
-	"github.com/mitchellh/go-fs"
 	"math"
+
+	"github.com/mitchellh/go-fs"
 )
 
 // The first cluster that can really hold user data is always 2

vendor/github.com/mitchellh/go-fs/fat/short_name.go

@@ -30,11 +30,11 @@ func generateShortName(longName string, used []string) (string, error) {
 	if dotIdx == -1 {
 		dotIdx = len(longName)
 	} else {
-		ext = longName[dotIdx+1 : len(longName)]
+		ext = longName[dotIdx+1:]
 	}
 
 	ext = cleanShortString(ext)
-	ext = ext[0:len(ext)]
+	ext = ext[0:]
 	rawName := longName[0:dotIdx]
 	name := cleanShortString(rawName)
 	simpleName := fmt.Sprintf("%s.%s", name, ext)
@@ -42,7 +42,7 @@ func generateShortName(longName string, used []string) (string, error) {
 		simpleName = simpleName[0 : len(simpleName)-1]
 	}
 
-	doSuffix := name != rawName || len(name) > 8
+	doSuffix := name != rawName || len(name) > 8 || len(ext) > 3
 	if !doSuffix {
 		for _, usedSingle := range used {
 			if strings.ToUpper(usedSingle) == simpleName {
@@ -53,6 +53,9 @@ func generateShortName(longName string, used []string) (string, error) {
 	}
 
 	if doSuffix {
+		if len(ext) > 3 {
+			ext = ext[:3]
+		}
 		found := false
 		for i := 1; i < 99999; i++ {
 			serial := fmt.Sprintf("~%d", i)

vendor/github.com/mitchellh/go-fs/fat/super_floppy.go

@@ -3,8 +3,9 @@ package fat
 import (
 	"errors"
 	"fmt"
-	"github.com/mitchellh/go-fs"
 	"time"
+
+	"github.com/mitchellh/go-fs"
 )
 
 // SuperFloppyConfig is the configuration for various properties of

vendor/vendor.json

@@ -1022,14 +1022,14 @@
 		{
 			"checksumSHA1": "mVqDwKcibat0IKAdzAhfGIHPwI8=",
 			"path": "github.com/mitchellh/go-fs",
-			"revision": "7bae45d9a684750e82b97ff320c82556614e621b",
+			"revision": "7b48fa161ea73ce54566b233d6fba8750b2faf47",
-			"revisionTime": "2016-11-08T19:11:23Z"
+			"revisionTime": "2018-04-02T23:40:41Z"
 		},
 		{
-			"checksumSHA1": "B5dy+Lg6jFPgHYhozztz88z3b4A=",
+			"checksumSHA1": "i+3acspzTbQODW3dWX2JKydHVAo=",
 			"path": "github.com/mitchellh/go-fs/fat",
-			"revision": "7bae45d9a684750e82b97ff320c82556614e621b",
+			"revision": "7b48fa161ea73ce54566b233d6fba8750b2faf47",
-			"revisionTime": "2016-11-08T19:11:23Z"
+			"revisionTime": "2018-04-02T23:40:41Z"
 		},
 		{
 			"checksumSHA1": "z235fRXw4+SW4xWgLTYc8SwkM2M=",