Update src-d/go-git to v4.13.0 (#7688)

* update gopkg.in/src-d/go-git.v4 v4.13.0

* mod tidy

* vendor

32 files changed, 196 insertions, 91 deletions

diff --git a/vendor/gopkg.in/src-d/go-billy.v4/.gitignore b/vendor/gopkg.in/src-d/go-billy.v4/.gitignore
index 62cdb53bc4..7aeb46699c 100644
--- a/vendor/gopkg.in/src-d/go-billy.v4/.gitignore
+++ b/vendor/gopkg.in/src-d/go-billy.v4/.gitignore
@@ -2,4 +2,3 @@
 /vendor
 Gopkg.lock
 Gopkg.toml
-go.sum
diff --git a/vendor/gopkg.in/src-d/go-billy.v4/.travis.yml b/vendor/gopkg.in/src-d/go-billy.v4/.travis.yml
index 759e2fba82..a70b470d4a 100644
--- a/vendor/gopkg.in/src-d/go-billy.v4/.travis.yml
+++ b/vendor/gopkg.in/src-d/go-billy.v4/.travis.yml
@@ -11,6 +11,7 @@ install:
 
 script:
   - make test-coverage
+  - ./.ci/test-building-binaries-for-supported-os.sh
 
 after_success:
   - bash <(curl -s https://codecov.io/bash)
diff --git a/vendor/gopkg.in/src-d/go-billy.v4/README.md b/vendor/gopkg.in/src-d/go-billy.v4/README.md
index ef243cca59..ae4a3f8691 100644
--- a/vendor/gopkg.in/src-d/go-billy.v4/README.md
+++ b/vendor/gopkg.in/src-d/go-billy.v4/README.md
@@ -1,4 +1,4 @@
-# go-billy [![GoDoc](https://godoc.org/gopkg.in/src-d/go-billy.v4?status.svg)](https://godoc.org/gopkg.in/src-d/go-billy.v4) [![Build Status](https://travis-ci.org/src-d/go-billy.svg)](https://travis-ci.org/src-d/go-billy) [![Build status](https://ci.appveyor.com/api/projects/status/vx2qn6vlakbi724t?svg=true)](https://ci.appveyor.com/project/mcuadros/go-billy) [![codecov](https://codecov.io/gh/src-d/go-billy/branch/master/graph/badge.svg)](https://codecov.io/gh/src-d/go-billy)
+# go-billy [![GoDoc](https://godoc.org/gopkg.in/src-d/go-billy.v4?status.svg)](https://godoc.org/gopkg.in/src-d/go-billy.v4) [![Build Status](https://travis-ci.com/src-d/go-billy.svg)](https://travis-ci.com/src-d/go-billy) [![Build status](https://ci.appveyor.com/api/projects/status/vx2qn6vlakbi724t?svg=true)](https://ci.appveyor.com/project/mcuadros/go-billy) [![codecov](https://codecov.io/gh/src-d/go-billy/branch/master/graph/badge.svg)](https://codecov.io/gh/src-d/go-billy)
 
 The missing interface filesystem abstraction for Go.
 Billy implements an interface based on the `os` standard library, allowing to develop applications without dependency on the underlying storage. Makes it virtually free to implement mocks and testing over filesystem operations.
diff --git a/vendor/gopkg.in/src-d/go-billy.v4/go.mod b/vendor/gopkg.in/src-d/go-billy.v4/go.mod
index eec1581118..e5227de0ae 100644
--- a/vendor/gopkg.in/src-d/go-billy.v4/go.mod
+++ b/vendor/gopkg.in/src-d/go-billy.v4/go.mod
@@ -2,6 +2,7 @@ module gopkg.in/src-d/go-billy.v4
 
 require (
 	github.com/kr/pretty v0.1.0 // indirect
-	golang.org/x/sys v0.0.0-20180903190138-2b024373dcd9
+	github.com/kr/pty v1.1.8 // indirect
+	golang.org/x/sys v0.0.0-20190726091711-fc99dfbffb4e
 	gopkg.in/check.v1 v1.0.0-20180628173108-788fd7840127
 )
diff --git a/vendor/gopkg.in/src-d/go-billy.v4/go.sum b/vendor/gopkg.in/src-d/go-billy.v4/go.sum
index aa96620083..5e9ed217e9 100644
--- a/vendor/gopkg.in/src-d/go-billy.v4/go.sum
+++ b/vendor/gopkg.in/src-d/go-billy.v4/go.sum
@@ -1,9 +1,12 @@
+github.com/creack/pty v1.1.7/go.mod h1:lj5s0c3V2DBrqTV7llrYr5NG6My20zk30Fl46Y7DoTY=
 github.com/kr/pretty v0.1.0 h1:L/CwN0zerZDmRFUapSPitk6f+Q3+0za1rQkzVuMiMFI=
 github.com/kr/pretty v0.1.0/go.mod h1:dAy3ld7l9f0ibDNOQOHHMYYIIbhfbHSm3C4ZsoJORNo=
 github.com/kr/pty v1.1.1/go.mod h1:pFQYn66WHrOpPYNljwOMqo10TkYh1fy3cYio2l3bCsQ=
+github.com/kr/pty v1.1.8/go.mod h1:O1sed60cT9XZ5uDucP5qwvh+TE3NnUj51EiZO/lmSfw=
 github.com/kr/text v0.1.0 h1:45sCR5RtlFHMR4UwH9sdQ5TC8v0qDQCHnXt+kaKSTVE=
 github.com/kr/text v0.1.0/go.mod h1:4Jbv+DJW3UT/LiOwJeYQe1efqtUx/iVham/4vfdArNI=
 golang.org/x/sys v0.0.0-20180903190138-2b024373dcd9 h1:lkiLiLBHGoH3XnqSLUIaBsilGMUjI+Uy2Xu2JLUtTas=
 golang.org/x/sys v0.0.0-20180903190138-2b024373dcd9/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
+golang.org/x/sys v0.0.0-20190726091711-fc99dfbffb4e/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 gopkg.in/check.v1 v1.0.0-20180628173108-788fd7840127 h1:qIbj1fsPNlZgppZ+VLlY7N33q108Sa+fhmuc+sWQYwY=
 gopkg.in/check.v1 v1.0.0-20180628173108-788fd7840127/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
diff --git a/vendor/gopkg.in/src-d/go-billy.v4/osfs/os_posix.go b/vendor/gopkg.in/src-d/go-billy.v4/osfs/os_posix.go
index 0eda3bd300..144cde1c18 100644
--- a/vendor/gopkg.in/src-d/go-billy.v4/osfs/os_posix.go
+++ b/vendor/gopkg.in/src-d/go-billy.v4/osfs/os_posix.go
@@ -3,19 +3,19 @@
 package osfs
 
 import (
-	"syscall"
+	"golang.org/x/sys/unix"
 )
 
 func (f *file) Lock() error {
 	f.m.Lock()
 	defer f.m.Unlock()
 
-	return syscall.Flock(int(f.File.Fd()), syscall.LOCK_EX)
+	return unix.Flock(int(f.File.Fd()), unix.LOCK_EX)
 }
 
 func (f *file) Unlock() error {
 	f.m.Lock()
 	defer f.m.Unlock()
 
-	return syscall.Flock(int(f.File.Fd()), syscall.LOCK_UN)
+	return unix.Flock(int(f.File.Fd()), unix.LOCK_UN)
 }
diff --git a/vendor/gopkg.in/src-d/go-git.v4/blame.go b/vendor/gopkg.in/src-d/go-git.v4/blame.go
index adb72d5745..f6108519ad 100644
--- a/vendor/gopkg.in/src-d/go-git.v4/blame.go
+++ b/vendor/gopkg.in/src-d/go-git.v4/blame.go
@@ -193,7 +193,7 @@ func (b *blame) fillGraphAndData() error {
 		// this first commit.
 		if i == 0 {
 			for j := 0; j < nLines; j++ {
-				b.graph[i][j] = (*object.Commit)(b.revs[i])
+				b.graph[i][j] = b.revs[i]
 			}
 		} else {
 			// if this is not the first commit, then assign to the old
@@ -211,7 +211,7 @@ func (b *blame) sliceGraph(i int) []*object.Commit {
 	fVs := b.graph[i]
 	result := make([]*object.Commit, 0, len(fVs))
 	for _, v := range fVs {
-		c := object.Commit(*v)
+		c := *v
 		result = append(result, &c)
 	}
 	return result
@@ -234,7 +234,7 @@ func (b *blame) assignOrigin(c, p int) {
 				b.graph[c][dl] = b.graph[p][sl]
 			case hunks[h].Type == 1:
 				dl++
-				b.graph[c][dl] = (*object.Commit)(b.revs[c])
+				b.graph[c][dl] = b.revs[c]
 			case hunks[h].Type == -1:
 				sl++
 			default:
diff --git a/vendor/gopkg.in/src-d/go-git.v4/config/branch.go b/vendor/gopkg.in/src-d/go-git.v4/config/branch.go
index af61bbb9b7..20dde6e030 100644
--- a/vendor/gopkg.in/src-d/go-git.v4/config/branch.go
+++ b/vendor/gopkg.in/src-d/go-git.v4/config/branch.go
@@ -72,7 +72,7 @@ func (b *Branch) marshal() *format.Subsection {
 	if b.Rebase == "" {
 		b.raw.RemoveOption(rebaseKey)
 	} else {
-		b.raw.SetOption(rebaseKey, string(b.Rebase))
+		b.raw.SetOption(rebaseKey, b.Rebase)
 	}
 
 	return b.raw
diff --git a/vendor/gopkg.in/src-d/go-git.v4/config/refspec.go b/vendor/gopkg.in/src-d/go-git.v4/config/refspec.go
index 7f486c9737..14bb40069c 100644
--- a/vendor/gopkg.in/src-d/go-git.v4/config/refspec.go
+++ b/vendor/gopkg.in/src-d/go-git.v4/config/refspec.go
@@ -18,7 +18,7 @@ var (
 	ErrRefSpecMalformedWildcard  = errors.New("malformed refspec, mismatched number of wildcards")
 )
 
-// RefSpec is a mapping from local branches to remote references
+// RefSpec is a mapping from local branches to remote references.
 // The format of the refspec is an optional +, followed by <src>:<dst>, where
 // <src> is the pattern for references on the remote side and <dst> is where
 // those references will be written locally. The + tells Git to update the
@@ -127,6 +127,13 @@ func (s RefSpec) Dst(n plumbing.ReferenceName) plumbing.ReferenceName {
 	return plumbing.ReferenceName(dst[0:wd] + match + dst[wd+1:])
 }
 
+func (s RefSpec) Reverse() RefSpec {
+	spec := string(s)
+	separator := strings.Index(spec, refSpecSeparator)
+
+	return RefSpec(spec[separator+1:] + refSpecSeparator + spec[:separator])
+}
+
 func (s RefSpec) String() string {
 	return string(s)
 }
diff --git a/vendor/gopkg.in/src-d/go-git.v4/go.mod b/vendor/gopkg.in/src-d/go-git.v4/go.mod
index 60d4702469..6f8b3d2e62 100644
--- a/vendor/gopkg.in/src-d/go-git.v4/go.mod
+++ b/vendor/gopkg.in/src-d/go-git.v4/go.mod
@@ -4,27 +4,26 @@ require (
 	github.com/alcortesm/tgz v0.0.0-20161220082320-9c5fe88206d7 // indirect
 	github.com/anmitsu/go-shlex v0.0.0-20161002113705-648efa622239 // indirect
 	github.com/armon/go-socks5 v0.0.0-20160902184237-e75332964ef5
-	github.com/davecgh/go-spew v1.1.1 // indirect
 	github.com/emirpasic/gods v1.12.0
 	github.com/flynn/go-shlex v0.0.0-20150515145356-3f9db97f8568 // indirect
-	github.com/gliderlabs/ssh v0.1.3
-	github.com/google/go-cmp v0.2.0
+	github.com/gliderlabs/ssh v0.2.2
+	github.com/google/go-cmp v0.3.0
 	github.com/jbenet/go-context v0.0.0-20150711004518-d14ea06fba99
 	github.com/jessevdk/go-flags v1.4.0
-	github.com/kevinburke/ssh_config v0.0.0-20180830205328-81db2a75821e
+	github.com/kevinburke/ssh_config v0.0.0-20190725054713-01f96b0aa0cd
 	github.com/mitchellh/go-homedir v1.1.0
 	github.com/pelletier/go-buffruneio v0.2.0 // indirect
 	github.com/pkg/errors v0.8.1 // indirect
 	github.com/sergi/go-diff v1.0.0
 	github.com/src-d/gcfg v1.4.0
-	github.com/stretchr/testify v1.3.0 // indirect
+	github.com/stretchr/objx v0.2.0 // indirect
 	github.com/xanzy/ssh-agent v0.2.1
-	golang.org/x/crypto v0.0.0-20190422183909-d864b10871cd
-	golang.org/x/net v0.0.0-20190502183928-7f726cade0ab
-	golang.org/x/sys v0.0.0-20190422165155-953cdadca894 // indirect
-	golang.org/x/text v0.3.0
+	golang.org/x/crypto v0.0.0-20190701094942-4def268fd1a4
+	golang.org/x/net v0.0.0-20190724013045-ca1201d0de80
+	golang.org/x/text v0.3.2
+	golang.org/x/tools v0.0.0-20190729092621-ff9f1409240a // indirect
 	gopkg.in/check.v1 v1.0.0-20180628173108-788fd7840127
-	gopkg.in/src-d/go-billy.v4 v4.3.0
+	gopkg.in/src-d/go-billy.v4 v4.3.2
 	gopkg.in/src-d/go-git-fixtures.v3 v3.5.0
 	gopkg.in/warnings.v0 v0.1.2 // indirect
 )
diff --git a/vendor/gopkg.in/src-d/go-git.v4/go.sum b/vendor/gopkg.in/src-d/go-git.v4/go.sum
index 94a6142432..65551c1658 100644
--- a/vendor/gopkg.in/src-d/go-git.v4/go.sum
+++ b/vendor/gopkg.in/src-d/go-git.v4/go.sum
@@ -4,6 +4,7 @@ github.com/anmitsu/go-shlex v0.0.0-20161002113705-648efa622239 h1:kFOfPq6dUM1hTo
 github.com/anmitsu/go-shlex v0.0.0-20161002113705-648efa622239/go.mod h1:2FmKhYUyUczH0OGQWaF5ceTx0UBShxjsH6f8oGKYe2c=
 github.com/armon/go-socks5 v0.0.0-20160902184237-e75332964ef5 h1:0CwZNZbxp69SHPdPJAN/hZIm0C4OItdklCFmMRWYpio=
 github.com/armon/go-socks5 v0.0.0-20160902184237-e75332964ef5/go.mod h1:wHh0iHkYZB8zMSxRWpUBQtwG5a7fFgvEO+odwuTv2gs=
+github.com/creack/pty v1.1.7/go.mod h1:lj5s0c3V2DBrqTV7llrYr5NG6My20zk30Fl46Y7DoTY=
 github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
 github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
 github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
@@ -13,17 +14,23 @@ github.com/flynn/go-shlex v0.0.0-20150515145356-3f9db97f8568 h1:BHsljHzVlRcyQhjr
 github.com/flynn/go-shlex v0.0.0-20150515145356-3f9db97f8568/go.mod h1:xEzjJPgXI435gkrCt3MPfRiAkVrwSbHsst4LCFVfpJc=
 github.com/gliderlabs/ssh v0.1.3 h1:cBU46h1lYQk5f2Z+jZbewFKy+1zzE2aUX/ilcPDAm9M=
 github.com/gliderlabs/ssh v0.1.3/go.mod h1:U7qILu1NlMHj9FlMhZLlkCdDnU1DBEAqr0aevW3Awn0=
+github.com/gliderlabs/ssh v0.2.2 h1:6zsha5zo/TWhRhwqCD3+EarCAgZ2yN28ipRnGPnwkI0=
+github.com/gliderlabs/ssh v0.2.2/go.mod h1:U7qILu1NlMHj9FlMhZLlkCdDnU1DBEAqr0aevW3Awn0=
 github.com/google/go-cmp v0.2.0 h1:+dTQ8DZQJz0Mb/HjFlkptS1FeQ4cWSnN941F8aEG4SQ=
 github.com/google/go-cmp v0.2.0/go.mod h1:oXzfMopK8JAjlY9xF4vHSVASa0yLyX7SntLO5aqRK0M=
+github.com/google/go-cmp v0.3.0/go.mod h1:8QqcDgzrUqlUb/G2PQTWiueGozuR1884gddMywk6iLU=
 github.com/jbenet/go-context v0.0.0-20150711004518-d14ea06fba99 h1:BQSFePA1RWJOlocH6Fxy8MmwDt+yVQYULKfN0RoTN8A=
 github.com/jbenet/go-context v0.0.0-20150711004518-d14ea06fba99/go.mod h1:1lJo3i6rXxKeerYnT8Nvf0QmHCRC1n8sfWVwXF2Frvo=
 github.com/jessevdk/go-flags v1.4.0 h1:4IU2WS7AumrZ/40jfhf4QVDMsQwqA7VEHozFRrGARJA=
 github.com/jessevdk/go-flags v1.4.0/go.mod h1:4FA24M0QyGHXBuZZK/XkWh8h0e1EYbRYJSGM75WSRxI=
 github.com/kevinburke/ssh_config v0.0.0-20180830205328-81db2a75821e h1:RgQk53JHp/Cjunrr1WlsXSZpqXn+uREuHvUVcK82CV8=
 github.com/kevinburke/ssh_config v0.0.0-20180830205328-81db2a75821e/go.mod h1:CT57kijsi8u/K/BOFA39wgDQJ9CxiF4nAY/ojJ6r6mM=
+github.com/kevinburke/ssh_config v0.0.0-20190725054713-01f96b0aa0cd h1:Coekwdh0v2wtGp9Gmz1Ze3eVRAWJMLokvN3QjdzCHLY=
+github.com/kevinburke/ssh_config v0.0.0-20190725054713-01f96b0aa0cd/go.mod h1:CT57kijsi8u/K/BOFA39wgDQJ9CxiF4nAY/ojJ6r6mM=
 github.com/kr/pretty v0.1.0 h1:L/CwN0zerZDmRFUapSPitk6f+Q3+0za1rQkzVuMiMFI=
 github.com/kr/pretty v0.1.0/go.mod h1:dAy3ld7l9f0ibDNOQOHHMYYIIbhfbHSm3C4ZsoJORNo=
 github.com/kr/pty v1.1.1/go.mod h1:pFQYn66WHrOpPYNljwOMqo10TkYh1fy3cYio2l3bCsQ=
+github.com/kr/pty v1.1.8/go.mod h1:O1sed60cT9XZ5uDucP5qwvh+TE3NnUj51EiZO/lmSfw=
 github.com/kr/text v0.1.0 h1:45sCR5RtlFHMR4UwH9sdQ5TC8v0qDQCHnXt+kaKSTVE=
 github.com/kr/text v0.1.0/go.mod h1:4Jbv+DJW3UT/LiOwJeYQe1efqtUx/iVham/4vfdArNI=
 github.com/mitchellh/go-homedir v1.1.0 h1:lukF9ziXFxDFPkA1vsr5zpc1XuPDn/wFntq5mG+4E0Y=
@@ -39,6 +46,7 @@ github.com/sergi/go-diff v1.0.0/go.mod h1:0CfEIISq7TuYL3j771MWULgwwjU+GofnZX9QAm
 github.com/src-d/gcfg v1.4.0 h1:xXbNR5AlLSA315x2UO+fTSSAXCDf+Ar38/6oyGbDKQ4=
 github.com/src-d/gcfg v1.4.0/go.mod h1:p/UMsR43ujA89BJY9duynAwIpvqEujIH/jFlfL7jWoI=
 github.com/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=
+github.com/stretchr/objx v0.2.0/go.mod h1:qt09Ya8vawLte6SNmTgCsAVtYtaKzEcn8ATUoHMkEqE=
 github.com/stretchr/testify v1.3.0 h1:TivCn/peBQ7UY8ooIcPgZFpTNSz0Q2U6UrFlUfqbe0Q=
 github.com/stretchr/testify v1.3.0/go.mod h1:M5WIy9Dh21IEIfnGCwXGc5bZfKNJtfHm1UVUgZn+9EI=
 github.com/xanzy/ssh-agent v0.2.1 h1:TCbipTQL2JiiCprBWx9frJ2eJlCYT00NmctrHxVAr70=
@@ -47,11 +55,17 @@ golang.org/x/crypto v0.0.0-20190219172222-a4c6cb3142f2/go.mod h1:6SG95UA2DQfeDnf
 golang.org/x/crypto v0.0.0-20190308221718-c2843e01d9a2/go.mod h1:djNgcEr1/C05ACkg1iLfiJU5Ep61QUkGW8qpdssI0+w=
 golang.org/x/crypto v0.0.0-20190422183909-d864b10871cd h1:sMHc2rZHuzQmrbVoSpt9HgerkXPyIeCSO6k0zUMGfFk=
 golang.org/x/crypto v0.0.0-20190422183909-d864b10871cd/go.mod h1:yigFU9vqHzYiE8UmvKecakEJjdnWj3jj499lnFckfCI=
+golang.org/x/crypto v0.0.0-20190701094942-4def268fd1a4 h1:HuIa8hRrWRSrqYzx1qI49NNxhdi2PrY7gxVSq1JjLDc=
+golang.org/x/crypto v0.0.0-20190701094942-4def268fd1a4/go.mod h1:yigFU9vqHzYiE8UmvKecakEJjdnWj3jj499lnFckfCI=
 golang.org/x/net v0.0.0-20190404232315-eb5bcb51f2a3/go.mod h1:t9HGtf8HONx5eT2rtn7q6eTqICYqUVnKs3thJo3Qplg=
 golang.org/x/net v0.0.0-20190420063019-afa5a82059c6 h1:HdqqaWmYAUI7/dmByKKEw+yxDksGSo+9GjkUc9Zp34E=
 golang.org/x/net v0.0.0-20190420063019-afa5a82059c6/go.mod h1:t9HGtf8HONx5eT2rtn7q6eTqICYqUVnKs3thJo3Qplg=
 golang.org/x/net v0.0.0-20190502183928-7f726cade0ab h1:9RfW3ktsOZxgo9YNbBAjq1FWzc/igwEcUzZz8IXgSbk=
 golang.org/x/net v0.0.0-20190502183928-7f726cade0ab/go.mod h1:t9HGtf8HONx5eT2rtn7q6eTqICYqUVnKs3thJo3Qplg=
+golang.org/x/net v0.0.0-20190620200207-3b0461eec859/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s=
+golang.org/x/net v0.0.0-20190724013045-ca1201d0de80 h1:Ao/3l156eZf2AW5wK8a7/smtodRU+gha3+BeqJ69lRk=
+golang.org/x/net v0.0.0-20190724013045-ca1201d0de80/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s=
+golang.org/x/sync v0.0.0-20190423024810-112230192c58/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
 golang.org/x/sys v0.0.0-20180903190138-2b024373dcd9 h1:lkiLiLBHGoH3XnqSLUIaBsilGMUjI+Uy2Xu2JLUtTas=
 golang.org/x/sys v0.0.0-20180903190138-2b024373dcd9/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
 golang.org/x/sys v0.0.0-20190215142949-d0b11bdaac8a/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
@@ -59,12 +73,19 @@ golang.org/x/sys v0.0.0-20190221075227-b4e8571b14e0/go.mod h1:STP8DvDyc/dI5b8T5h
 golang.org/x/sys v0.0.0-20190412213103-97732733099d/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20190422165155-953cdadca894 h1:Cz4ceDQGXuKRnVBDTS23GTn/pU5OE2C0WrNTOYK1Uuc=
 golang.org/x/sys v0.0.0-20190422165155-953cdadca894/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
+golang.org/x/sys v0.0.0-20190726091711-fc99dfbffb4e h1:D5TXcfTk7xF7hvieo4QErS3qqCB4teTffacDWr7CI+0=
+golang.org/x/sys v0.0.0-20190726091711-fc99dfbffb4e/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/text v0.3.0 h1:g61tztE5qeGQ89tm6NTjjM9VPIm088od1l6aSorWRWg=
 golang.org/x/text v0.3.0/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
+golang.org/x/text v0.3.2/go.mod h1:bEr9sfX3Q8Zfm5fL9x+3itogRgK3+ptLWKqgva+5dAk=
+golang.org/x/tools v0.0.0-20180917221912-90fa682c2a6e/go.mod h1:n7NCudcB/nEzxVGmLbDWY5pfWTLqBcC2KZ6jyYvM4mQ=
+golang.org/x/tools v0.0.0-20190729092621-ff9f1409240a/go.mod h1:jcCCGcm9btYwXyDqrUWc6MKQKKGJCWEQ3AfLSRIbEuI=
 gopkg.in/check.v1 v1.0.0-20180628173108-788fd7840127 h1:qIbj1fsPNlZgppZ+VLlY7N33q108Sa+fhmuc+sWQYwY=
 gopkg.in/check.v1 v1.0.0-20180628173108-788fd7840127/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
 gopkg.in/src-d/go-billy.v4 v4.3.0 h1:KtlZ4c1OWbIs4jCv5ZXrTqG8EQocr0g/d4DjNg70aek=
 gopkg.in/src-d/go-billy.v4 v4.3.0/go.mod h1:tm33zBoOwxjYHZIE+OV8bxTWFMJLrconzFMd38aARFk=
+gopkg.in/src-d/go-billy.v4 v4.3.2 h1:0SQA1pRztfTFx2miS8sA97XvooFeNOmvUenF4o0EcVg=
+gopkg.in/src-d/go-billy.v4 v4.3.2/go.mod h1:nDjArDMp+XMs1aFAESLRjfGSgfvoYN0hDfzEk0GjC98=
 gopkg.in/src-d/go-git-fixtures.v3 v3.5.0 h1:ivZFOIltbce2Mo8IjzUHAFoq/IylO9WHhNOAJK+LsJg=
 gopkg.in/src-d/go-git-fixtures.v3 v3.5.0/go.mod h1:dLBcvytrw/TYZsNTWCnkNF2DSIlzWYqTe3rJR56Ac7g=
 gopkg.in/warnings.v0 v0.1.2 h1:wFXVbFY8DY5/xOe1ECiWdKCzZlxgshcYVNkBHstARME=
diff --git a/vendor/gopkg.in/src-d/go-git.v4/options.go b/vendor/gopkg.in/src-d/go-git.v4/options.go
index a3b14fe2de..0f728e7c27 100644
--- a/vendor/gopkg.in/src-d/go-git.v4/options.go
+++ b/vendor/gopkg.in/src-d/go-git.v4/options.go
@@ -186,6 +186,9 @@ type PushOptions struct {
 	// Progress is where the human readable information sent by the server is
 	// stored, if nil nothing is stored.
 	Progress sideband.Progress
+	// Prune specify that remote refs that match given RefSpecs and that do
+	// not exist locally will be removed.
+	Prune bool
 }
 
 // Validate validates the fields and sets the default values.
diff --git a/vendor/gopkg.in/src-d/go-git.v4/plumbing/format/commitgraph/encoder.go b/vendor/gopkg.in/src-d/go-git.v4/plumbing/format/commitgraph/encoder.go
index a06871cb7c..615e833c1e 100644
--- a/vendor/gopkg.in/src-d/go-git.v4/plumbing/format/commitgraph/encoder.go
+++ b/vendor/gopkg.in/src-d/go-git.v4/plumbing/format/commitgraph/encoder.go
@@ -24,8 +24,6 @@ func NewEncoder(w io.Writer) *Encoder {
 

 // Encode writes an index into the commit-graph file

 func (e *Encoder) Encode(idx Index) error {

-	var err error

-

 	// Get all the hashes in the input index

 	hashes := idx.Hashes()

 

@@ -39,26 +37,26 @@ func (e *Encoder) Encode(idx Index) error {
 		chunkSizes = append(chunkSizes, uint64(extraEdgesCount)*4)

 	}

 

-	if err = e.encodeFileHeader(len(chunkSignatures)); err != nil {

+	if err := e.encodeFileHeader(len(chunkSignatures)); err != nil {

 		return err

 	}

-	if err = e.encodeChunkHeaders(chunkSignatures, chunkSizes); err != nil {

+	if err := e.encodeChunkHeaders(chunkSignatures, chunkSizes); err != nil {

 		return err

 	}

-	if err = e.encodeFanout(fanout); err != nil {

+	if err := e.encodeFanout(fanout); err != nil {

 		return err

 	}

-	if err = e.encodeOidLookup(hashes); err != nil {

+	if err := e.encodeOidLookup(hashes); err != nil {

 		return err

 	}

 	if extraEdges, err := e.encodeCommitData(hashes, hashToIndex, idx); err == nil {

 		if err = e.encodeExtraEdges(extraEdges); err != nil {

 			return err

 		}

-	}

-	if err != nil {

+	} else {

 		return err

 	}

+

 	return e.encodeChecksum()

 }

 

diff --git a/vendor/gopkg.in/src-d/go-git.v4/plumbing/format/commitgraph/file.go b/vendor/gopkg.in/src-d/go-git.v4/plumbing/format/commitgraph/file.go
index 175d279333..1f82abd754 100644
--- a/vendor/gopkg.in/src-d/go-git.v4/plumbing/format/commitgraph/file.go
+++ b/vendor/gopkg.in/src-d/go-git.v4/plumbing/format/commitgraph/file.go
@@ -249,7 +249,7 @@ func (fi *fileIndex) getHashesFromIndexes(indexes []int) ([]plumbing.Hash, error
 // Hashes returns all the hashes that are available in the index

 func (fi *fileIndex) Hashes() []plumbing.Hash {

 	hashes := make([]plumbing.Hash, fi.fanout[0xff])

-	for i := 0; i < int(fi.fanout[0xff]); i++ {

+	for i := 0; i < fi.fanout[0xff]; i++ {

 		offset := fi.oidLookupOffset + int64(i)*20

 		if n, err := fi.reader.ReadAt(hashes[i][:], offset); err != nil || n < 20 {

 			return nil

diff --git a/vendor/gopkg.in/src-d/go-git.v4/plumbing/format/commitgraph/memory.go b/vendor/gopkg.in/src-d/go-git.v4/plumbing/format/commitgraph/memory.go
index a4a96e9612..f5afd4c598 100644
--- a/vendor/gopkg.in/src-d/go-git.v4/plumbing/format/commitgraph/memory.go
+++ b/vendor/gopkg.in/src-d/go-git.v4/plumbing/format/commitgraph/memory.go
@@ -31,7 +31,7 @@ func (mi *MemoryIndex) GetIndexByHash(h plumbing.Hash) (int, error) {
 // GetCommitDataByIndex gets the commit node from the commit graph using index

 // obtained from child node, if available

 func (mi *MemoryIndex) GetCommitDataByIndex(i int) (*CommitData, error) {

-	if int(i) >= len(mi.commitData) {

+	if i >= len(mi.commitData) {

 		return nil, plumbing.ErrObjectNotFound

 	}

 

diff --git a/vendor/gopkg.in/src-d/go-git.v4/plumbing/format/diff/unified_encoder.go b/vendor/gopkg.in/src-d/go-git.v4/plumbing/format/diff/unified_encoder.go
index 8bd6d8abc8..169242dc5b 100644
--- a/vendor/gopkg.in/src-d/go-git.v4/plumbing/format/diff/unified_encoder.go
+++ b/vendor/gopkg.in/src-d/go-git.v4/plumbing/format/diff/unified_encoder.go
@@ -94,7 +94,7 @@ func (e *UnifiedEncoder) printMessage(message string) {
 	isEmpty := message == ""
 	hasSuffix := strings.HasSuffix(message, "\n")
 	if !isEmpty && !hasSuffix {
-		message = message + "\n"
+		message += "\n"
 	}
 
 	e.buf.WriteString(message)
diff --git a/vendor/gopkg.in/src-d/go-git.v4/plumbing/format/idxfile/decoder.go b/vendor/gopkg.in/src-d/go-git.v4/plumbing/format/idxfile/decoder.go
index 5b927826a1..9e9c1769ab 100644
--- a/vendor/gopkg.in/src-d/go-git.v4/plumbing/format/idxfile/decoder.go
+++ b/vendor/gopkg.in/src-d/go-git.v4/plumbing/format/idxfile/decoder.go
@@ -110,10 +110,6 @@ func readObjectNames(idx *MemoryIndex, r io.Reader) error {
 			continue
 		}
 
-		if buckets < 0 {
-			return ErrMalformedIdxFile
-		}
-
 		idx.FanoutMapping[k] = len(idx.Names)
 
 		nameLen := int(buckets * objectIDLength)
diff --git a/vendor/gopkg.in/src-d/go-git.v4/plumbing/format/idxfile/writer.go b/vendor/gopkg.in/src-d/go-git.v4/plumbing/format/idxfile/writer.go
index aa919e783b..fcc78c56d0 100644
--- a/vendor/gopkg.in/src-d/go-git.v4/plumbing/format/idxfile/writer.go
+++ b/vendor/gopkg.in/src-d/go-git.v4/plumbing/format/idxfile/writer.go
@@ -147,7 +147,7 @@ func (w *Writer) createIndex() (*MemoryIndex, error) {
 		idx.Offset32[bucket] = append(idx.Offset32[bucket], buf.Bytes()...)
 
 		buf.Truncate(0)
-		binary.WriteUint32(buf, uint32(o.CRC32))
+		binary.WriteUint32(buf, o.CRC32)
 		idx.CRC32[bucket] = append(idx.CRC32[bucket], buf.Bytes()...)
 	}
 
diff --git a/vendor/gopkg.in/src-d/go-git.v4/plumbing/format/index/doc.go b/vendor/gopkg.in/src-d/go-git.v4/plumbing/format/index/doc.go
index f2b3d76cdc..39ae6ad5f9 100644
--- a/vendor/gopkg.in/src-d/go-git.v4/plumbing/format/index/doc.go
+++ b/vendor/gopkg.in/src-d/go-git.v4/plumbing/format/index/doc.go
@@ -320,7 +320,7 @@
 //  == End of Index Entry
 //
 //    The End of Index Entry (EOIE) is used to locate the end of the variable
-//    length index entries and the begining of the extensions. Code can take
+//    length index entries and the beginning of the extensions. Code can take
 //    advantage of this to quickly locate the index extensions without having
 //    to parse through all of the index entries.
 //
@@ -353,7 +353,7 @@
 //
 //    - A number of index offset entries each consisting of:
 //
-//    - 32-bit offset from the begining of the file to the first cache entry
+//    - 32-bit offset from the beginning of the file to the first cache entry
 //      in this block of entries.
 //
 //    - 32-bit count of cache entries in this blockpackage index
diff --git a/vendor/gopkg.in/src-d/go-git.v4/plumbing/format/index/index.go b/vendor/gopkg.in/src-d/go-git.v4/plumbing/format/index/index.go
index 6c4b7ca745..6653c91d2b 100644
--- a/vendor/gopkg.in/src-d/go-git.v4/plumbing/format/index/index.go
+++ b/vendor/gopkg.in/src-d/go-git.v4/plumbing/format/index/index.go
@@ -198,7 +198,7 @@ type ResolveUndoEntry struct {
 }
 
 // EndOfIndexEntry is the End of Index Entry (EOIE) is used to locate the end of
-// the variable length index entries and the begining of the extensions. Code
+// the variable length index entries and the beginning of the extensions. Code
 // can take advantage of this to quickly locate the index extensions without
 // having to parse through all of the index entries.
 //
diff --git a/vendor/gopkg.in/src-d/go-git.v4/plumbing/object/merge_base.go b/vendor/gopkg.in/src-d/go-git.v4/plumbing/object/merge_base.go
index 689e4217d0..6f2568dbc8 100644
--- a/vendor/gopkg.in/src-d/go-git.v4/plumbing/object/merge_base.go
+++ b/vendor/gopkg.in/src-d/go-git.v4/plumbing/object/merge_base.go
@@ -32,7 +32,7 @@ func (c *Commit) MergeBase(other *Commit) ([]*Commit, error) {
 	var res []*Commit
 	inNewerHistory := isInIndexCommitFilter(newerHistory)
 	resIter := NewFilterCommitIter(older, &inNewerHistory, &inNewerHistory)
-	err = resIter.ForEach(func(commit *Commit) error {
+	_ = resIter.ForEach(func(commit *Commit) error {
 		res = append(res, commit)
 		return nil
 	})
diff --git a/vendor/gopkg.in/src-d/go-git.v4/plumbing/object/patch.go b/vendor/gopkg.in/src-d/go-git.v4/plumbing/object/patch.go
index 1efd0b13da..32454ac48d 100644
--- a/vendor/gopkg.in/src-d/go-git.v4/plumbing/object/patch.go
+++ b/vendor/gopkg.in/src-d/go-git.v4/plumbing/object/patch.go
@@ -278,7 +278,7 @@ func printStat(fileStats []FileStat) string {
 	var scaleFactor float64
 	if longestTotalChange > heightOfHistogram {
 		// Scale down to heightOfHistogram.
-		scaleFactor = float64(longestTotalChange / heightOfHistogram)
+		scaleFactor = longestTotalChange / heightOfHistogram
 	} else {
 		scaleFactor = 1.0
 	}
diff --git a/vendor/gopkg.in/src-d/go-git.v4/plumbing/object/tree.go b/vendor/gopkg.in/src-d/go-git.v4/plumbing/object/tree.go
index d30cf6e1aa..d0b4fff15c 100644
--- a/vendor/gopkg.in/src-d/go-git.v4/plumbing/object/tree.go
+++ b/vendor/gopkg.in/src-d/go-git.v4/plumbing/object/tree.go
@@ -288,7 +288,7 @@ func (t *Tree) Encode(o plumbing.EncodedObject) (err error) {
 			return err
 		}
 
-		if _, err = w.Write([]byte(entry.Hash[:])); err != nil {
+		if _, err = w.Write(entry.Hash[:]); err != nil {
 			return err
 		}
 	}
@@ -517,4 +517,4 @@ func simpleJoin(parent, child string) string {
 		return parent + "/" + child
 	}
 	return child
-}
\ No newline at end of file
+}
diff --git a/vendor/gopkg.in/src-d/go-git.v4/plumbing/protocol/packp/advrefs.go b/vendor/gopkg.in/src-d/go-git.v4/plumbing/protocol/packp/advrefs.go
index 684e76a56e..487ee19bd8 100644
--- a/vendor/gopkg.in/src-d/go-git.v4/plumbing/protocol/packp/advrefs.go
+++ b/vendor/gopkg.in/src-d/go-git.v4/plumbing/protocol/packp/advrefs.go
@@ -107,7 +107,7 @@ func (a *AdvRefs) resolveHead(s storer.ReferenceStorer) error {
 		return nil
 	}
 
-	ref, err := s.Reference(plumbing.ReferenceName(plumbing.Master))
+	ref, err := s.Reference(plumbing.Master)
 
 	// check first if HEAD is pointing to master
 	if err == nil {
diff --git a/vendor/gopkg.in/src-d/go-git.v4/plumbing/protocol/packp/updreq_decode.go b/vendor/gopkg.in/src-d/go-git.v4/plumbing/protocol/packp/updreq_decode.go
index c15d49cfb7..51e8183d1f 100644
--- a/vendor/gopkg.in/src-d/go-git.v4/plumbing/protocol/packp/updreq_decode.go
+++ b/vendor/gopkg.in/src-d/go-git.v4/plumbing/protocol/packp/updreq_decode.go
@@ -225,7 +225,7 @@ func parseCommand(b []byte) (*Command, error) {
 		return nil, errInvalidNewObjId(err)
 	}
 
-	return &Command{Old: oh, New: nh, Name: plumbing.ReferenceName(n)}, nil
+	return &Command{Old: oh, New: nh, Name: n}, nil
 }
 
 func parseHash(s string) (plumbing.Hash, error) {
diff --git a/vendor/gopkg.in/src-d/go-git.v4/plumbing/transport/http/common.go b/vendor/gopkg.in/src-d/go-git.v4/plumbing/transport/http/common.go
index 5d3535e822..38e903d456 100644
--- a/vendor/gopkg.in/src-d/go-git.v4/plumbing/transport/http/common.go
+++ b/vendor/gopkg.in/src-d/go-git.v4/plumbing/transport/http/common.go
@@ -139,7 +139,7 @@ func (s *session) ApplyAuthToRequest(req *http.Request) {
 		return
 	}
 
-	s.auth.setAuth(req)
+	s.auth.SetAuth(req)
 }
 
 func (s *session) ModifyEndpointIfRedirect(res *http.Response) {
@@ -175,7 +175,7 @@ func (*session) Close() error {
 // AuthMethod is concrete implementation of common.AuthMethod for HTTP services
 type AuthMethod interface {
 	transport.AuthMethod
-	setAuth(r *http.Request)
+	SetAuth(r *http.Request)
 }
 
 func basicAuthFromEndpoint(ep *transport.Endpoint) *BasicAuth {
@@ -192,7 +192,7 @@ type BasicAuth struct {
 	Username, Password string
 }
 
-func (a *BasicAuth) setAuth(r *http.Request) {
+func (a *BasicAuth) SetAuth(r *http.Request) {
 	if a == nil {
 		return
 	}
@@ -226,7 +226,7 @@ type TokenAuth struct {
 	Token string
 }
 
-func (a *TokenAuth) setAuth(r *http.Request) {
+func (a *TokenAuth) SetAuth(r *http.Request) {
 	if a == nil {
 		return
 	}
diff --git a/vendor/gopkg.in/src-d/go-git.v4/plumbing/transport/server/server.go b/vendor/gopkg.in/src-d/go-git.v4/plumbing/transport/server/server.go
index 20bd12e211..8e0dcc1192 100644
--- a/vendor/gopkg.in/src-d/go-git.v4/plumbing/transport/server/server.go
+++ b/vendor/gopkg.in/src-d/go-git.v4/plumbing/transport/server/server.go
@@ -286,11 +286,6 @@ func (s *rpSession) updateReferences(req *packp.ReferenceUpdateRequest) {
 				continue
 			}
 
-			if err != nil {
-				s.setStatus(cmd.Name, err)
-				continue
-			}
-
 			ref := plumbing.NewHashReference(cmd.Name, cmd.New)
 			err := s.storer.SetReference(ref)
 			s.setStatus(cmd.Name, err)
diff --git a/vendor/gopkg.in/src-d/go-git.v4/plumbing/transport/ssh/auth_method.go b/vendor/gopkg.in/src-d/go-git.v4/plumbing/transport/ssh/auth_method.go
index dbb47c56bb..1e5c38375e 100644
--- a/vendor/gopkg.in/src-d/go-git.v4/plumbing/transport/ssh/auth_method.go
+++ b/vendor/gopkg.in/src-d/go-git.v4/plumbing/transport/ssh/auth_method.go
@@ -61,7 +61,7 @@ func (a *KeyboardInteractive) ClientConfig() (*ssh.ClientConfig, error) {
 	return a.SetHostKeyCallback(&ssh.ClientConfig{
 		User: a.User,
 		Auth: []ssh.AuthMethod{
-			ssh.KeyboardInteractiveChallenge(a.Challenge),
+			a.Challenge,
 		},
 	})
 }
diff --git a/vendor/gopkg.in/src-d/go-git.v4/remote.go b/vendor/gopkg.in/src-d/go-git.v4/remote.go
index bcc4c4c49b..baee7a0826 100644
--- a/vendor/gopkg.in/src-d/go-git.v4/remote.go
+++ b/vendor/gopkg.in/src-d/go-git.v4/remote.go
@@ -171,7 +171,17 @@ func (r *Remote) PushContext(ctx context.Context, o *PushOptions) (err error) {
 		}
 	}
 
-	rs, err := pushHashes(ctx, s, r.s, req, hashesToPush, r.useRefDeltas(ar))
+	if len(hashesToPush) == 0 {
+		allDelete = true
+		for _, command := range req.Commands {
+			if command.Action() != packp.Delete {
+				allDelete = false
+				break
+			}
+		}
+	}
+
+	rs, err := pushHashes(ctx, s, r.s, req, hashesToPush, r.useRefDeltas(ar), allDelete)
 	if err != nil {
 		return err
 	}
@@ -204,7 +214,7 @@ func (r *Remote) newReferenceUpdateRequest(
 		}
 	}
 
-	if err := r.addReferencesToUpdate(o.RefSpecs, localRefs, remoteRefs, req); err != nil {
+	if err := r.addReferencesToUpdate(o.RefSpecs, localRefs, remoteRefs, req, o.Prune); err != nil {
 		return nil, err
 	}
 
@@ -392,6 +402,7 @@ func (r *Remote) addReferencesToUpdate(
 	localRefs []*plumbing.Reference,
 	remoteRefs storer.ReferenceStorer,
 	req *packp.ReferenceUpdateRequest,
+	prune bool,
 ) error {
 	// This references dictionary will be used to search references by name.
 	refsDict := make(map[string]*plumbing.Reference)
@@ -401,7 +412,7 @@ func (r *Remote) addReferencesToUpdate(
 
 	for _, rs := range refspecs {
 		if rs.IsDelete() {
-			if err := r.deleteReferences(rs, remoteRefs, req); err != nil {
+			if err := r.deleteReferences(rs, remoteRefs, refsDict, req, false); err != nil {
 				return err
 			}
 		} else {
@@ -409,6 +420,12 @@ func (r *Remote) addReferencesToUpdate(
 			if err != nil {
 				return err
 			}
+
+			if prune {
+				if err := r.deleteReferences(rs, remoteRefs, refsDict, req, true); err != nil {
+					return err
+				}
+			}
 		}
 	}
 
@@ -444,7 +461,10 @@ func (r *Remote) addOrUpdateReferences(
 }
 
 func (r *Remote) deleteReferences(rs config.RefSpec,
-	remoteRefs storer.ReferenceStorer, req *packp.ReferenceUpdateRequest) error {
+	remoteRefs storer.ReferenceStorer,
+	refsDict map[string]*plumbing.Reference,
+	req *packp.ReferenceUpdateRequest,
+	prune bool) error {
 	iter, err := remoteRefs.IterReferences()
 	if err != nil {
 		return err
@@ -455,8 +475,19 @@ func (r *Remote) deleteReferences(rs config.RefSpec,
 			return nil
 		}
 
-		if rs.Dst("") != ref.Name() {
-			return nil
+		if prune {
+			rs := rs.Reverse()
+			if !rs.Match(ref.Name()) {
+				return nil
+			}
+
+			if _, ok := refsDict[rs.Dst(ref.Name()).String()]; ok {
+				return nil
+			}
+		} else {
+			if rs.Dst("") != ref.Name() {
+				return nil
+			}
 		}
 
 		cmd := &packp.Command{
@@ -906,7 +937,7 @@ func (r *Remote) updateLocalReferenceStorage(
 		updated = true
 	}
 
-	if err == nil && forceNeeded {
+	if forceNeeded {
 		err = ErrForceNeeded
 	}
 
@@ -1015,10 +1046,11 @@ func pushHashes(
 	req *packp.ReferenceUpdateRequest,
 	hs []plumbing.Hash,
 	useRefDeltas bool,
+	allDelete bool,
 ) (*packp.ReportStatus, error) {
 
 	rd, wr := io.Pipe()
-	req.Packfile = rd
+
 	config, err := s.Config()
 	if err != nil {
 		return nil, err
@@ -1029,15 +1061,20 @@ func pushHashes(
 	// to the channel.
 	done := make(chan error, 1)
 
-	go func() {
-		e := packfile.NewEncoder(wr, s, useRefDeltas)
-		if _, err := e.Encode(hs, config.Pack.Window); err != nil {
-			done <- wr.CloseWithError(err)
-			return
-		}
+	if !allDelete {
+		req.Packfile = rd
+		go func() {
+			e := packfile.NewEncoder(wr, s, useRefDeltas)
+			if _, err := e.Encode(hs, config.Pack.Window); err != nil {
+				done <- wr.CloseWithError(err)
+				return
+			}
 
-		done <- wr.Close()
-	}()
+			done <- wr.Close()
+		}()
+	} else {
+		close(done)
+	}
 
 	rs, err := sess.ReceivePack(ctx, req)
 	if err != nil {
diff --git a/vendor/gopkg.in/src-d/go-git.v4/storage/filesystem/index.go b/vendor/gopkg.in/src-d/go-git.v4/storage/filesystem/index.go
index d04195ccba..be800eff3b 100644
--- a/vendor/gopkg.in/src-d/go-git.v4/storage/filesystem/index.go
+++ b/vendor/gopkg.in/src-d/go-git.v4/storage/filesystem/index.go
@@ -20,8 +20,14 @@ func (s *IndexStorage) SetIndex(idx *index.Index) (err error) {
 	}
 
 	defer ioutil.CheckClose(f, &err)
+	bw := bufio.NewWriter(f)
+	defer func() {
+		if e := bw.Flush(); err == nil && e != nil {
+			err = e
+		}
+	}()
 
-	e := index.NewEncoder(f)
+	e := index.NewEncoder(bw)
 	err = e.Encode(idx)
 	return err
 }
diff --git a/vendor/gopkg.in/src-d/go-git.v4/worktree.go b/vendor/gopkg.in/src-d/go-git.v4/worktree.go
index 576ae0abde..4a609e9eab 100644
--- a/vendor/gopkg.in/src-d/go-git.v4/worktree.go
+++ b/vendor/gopkg.in/src-d/go-git.v4/worktree.go
@@ -9,6 +9,7 @@ import (
 	"os"
 	"path/filepath"
 	"strings"
+	"sync"
 
 	"gopkg.in/src-d/go-git.v4/config"
 	"gopkg.in/src-d/go-git.v4/plumbing"
@@ -304,6 +305,7 @@ func (w *Worktree) resetIndex(t *object.Tree) error {
 	if err != nil {
 		return err
 	}
+	b := newIndexBuilder(idx)
 
 	changes, err := w.diffTreeWithStaging(t, true)
 	if err != nil {
@@ -330,12 +332,12 @@ func (w *Worktree) resetIndex(t *object.Tree) error {
 			name = ch.From.String()
 		}
 
-		_, _ = idx.Remove(name)
+		b.Remove(name)
 		if e == nil {
 			continue
 		}
 
-		idx.Entries = append(idx.Entries, &index.Entry{
+		b.Add(&index.Entry{
 			Name: name,
 			Hash: e.Hash,
 			Mode: e.Mode,
@@ -343,6 +345,7 @@ func (w *Worktree) resetIndex(t *object.Tree) error {
 
 	}
 
+	b.Write(idx)
 	return w.r.Storer.SetIndex(idx)
 }
 
@@ -356,17 +359,19 @@ func (w *Worktree) resetWorktree(t *object.Tree) error {
 	if err != nil {
 		return err
 	}
+	b := newIndexBuilder(idx)
 
 	for _, ch := range changes {
-		if err := w.checkoutChange(ch, t, idx); err != nil {
+		if err := w.checkoutChange(ch, t, b); err != nil {
 			return err
 		}
 	}
 
+	b.Write(idx)
 	return w.r.Storer.SetIndex(idx)
 }
 
-func (w *Worktree) checkoutChange(ch merkletrie.Change, t *object.Tree, idx *index.Index) error {
+func (w *Worktree) checkoutChange(ch merkletrie.Change, t *object.Tree, idx *indexBuilder) error {
 	a, err := ch.Action()
 	if err != nil {
 		return err
@@ -445,7 +450,7 @@ func (w *Worktree) setHEADCommit(commit plumbing.Hash) error {
 func (w *Worktree) checkoutChangeSubmodule(name string,
 	a merkletrie.Action,
 	e *object.TreeEntry,
-	idx *index.Index,
+	idx *indexBuilder,
 ) error {
 	switch a {
 	case merkletrie.Modify:
@@ -479,11 +484,11 @@ func (w *Worktree) checkoutChangeRegularFile(name string,
 	a merkletrie.Action,
 	t *object.Tree,
 	e *object.TreeEntry,
-	idx *index.Index,
+	idx *indexBuilder,
 ) error {
 	switch a {
 	case merkletrie.Modify:
-		_, _ = idx.Remove(name)
+		idx.Remove(name)
 
 		// to apply perm changes the file is deleted, billy doesn't implement
 		// chmod
@@ -508,6 +513,12 @@ func (w *Worktree) checkoutChangeRegularFile(name string,
 	return nil
 }
 
+var copyBufferPool = sync.Pool{
+	New: func() interface{} {
+		return make([]byte, 32*1024)
+	},
+}
+
 func (w *Worktree) checkoutFile(f *object.File) (err error) {
 	mode, err := f.Mode.ToOSFileMode()
 	if err != nil {
@@ -531,8 +542,9 @@ func (w *Worktree) checkoutFile(f *object.File) (err error) {
 	}
 
 	defer ioutil.CheckClose(to, &err)
-
-	_, err = io.Copy(to, from)
+	buf := copyBufferPool.Get().([]byte)
+	_, err = io.CopyBuffer(to, from, buf)
+	copyBufferPool.Put(buf)
 	return
 }
 
@@ -569,19 +581,18 @@ func (w *Worktree) checkoutFileSymlink(f *object.File) (err error) {
 	return
 }
 
-func (w *Worktree) addIndexFromTreeEntry(name string, f *object.TreeEntry, idx *index.Index) error {
-	_, _ = idx.Remove(name)
-	idx.Entries = append(idx.Entries, &index.Entry{
+func (w *Worktree) addIndexFromTreeEntry(name string, f *object.TreeEntry, idx *indexBuilder) error {
+	idx.Remove(name)
+	idx.Add(&index.Entry{
 		Hash: f.Hash,
 		Name: name,
 		Mode: filemode.Submodule,
 	})
-
 	return nil
 }
 
-func (w *Worktree) addIndexFromFile(name string, h plumbing.Hash, idx *index.Index) error {
-	_, _ = idx.Remove(name)
+func (w *Worktree) addIndexFromFile(name string, h plumbing.Hash, idx *indexBuilder) error {
+	idx.Remove(name)
 	fi, err := w.Filesystem.Lstat(name)
 	if err != nil {
 		return err
@@ -605,8 +616,7 @@ func (w *Worktree) addIndexFromFile(name string, h plumbing.Hash, idx *index.Ind
 	if fillSystemInfo != nil {
 		fillSystemInfo(e, fi.Sys())
 	}
-
-	idx.Entries = append(idx.Entries, e)
+	idx.Add(e)
 	return nil
 }
 
@@ -913,3 +923,32 @@ func doCleanDirectories(fs billy.Filesystem, dir string) error {
 	}
 	return nil
 }
+
+type indexBuilder struct {
+	entries map[string]*index.Entry
+}
+
+func newIndexBuilder(idx *index.Index) *indexBuilder {
+	entries := make(map[string]*index.Entry, len(idx.Entries))
+	for _, e := range idx.Entries {
+		entries[e.Name] = e
+	}
+	return &indexBuilder{
+		entries: entries,
+	}
+}
+
+func (b *indexBuilder) Write(idx *index.Index) {
+	idx.Entries = idx.Entries[:0]
+	for _, e := range b.entries {
+		idx.Entries = append(idx.Entries, e)
+	}
+}
+
+func (b *indexBuilder) Add(e *index.Entry) {
+	b.entries[e.Name] = e
+}
+
+func (b *indexBuilder) Remove(name string) {
+	delete(b.entries, filepath.ToSlash(name))
+}
diff --git a/vendor/gopkg.in/src-d/go-git.v4/worktree_linux.go b/vendor/gopkg.in/src-d/go-git.v4/worktree_linux.go
index 891cb1cf39..efb01b5a58 100644
--- a/vendor/gopkg.in/src-d/go-git.v4/worktree_linux.go
+++ b/vendor/gopkg.in/src-d/go-git.v4/worktree_linux.go
@@ -12,7 +12,7 @@ import (
 func init() {
 	fillSystemInfo = func(e *index.Entry, sys interface{}) {
 		if os, ok := sys.(*syscall.Stat_t); ok {
-			e.CreatedAt = time.Unix(int64(os.Ctim.Sec), int64(os.Ctim.Nsec))
+			e.CreatedAt = time.Unix(os.Ctim.Sec, os.Ctim.Nsec)
 			e.Dev = uint32(os.Dev)
 			e.Inode = uint32(os.Ino)
 			e.GID = os.Gid