From 1ad4d1aafde97f0d0ef0f80ccf12b32f3a2e5329 Mon Sep 17 00:00:00 2001
From: Alexander Neumann <alexander@bumpern.de>
Date: Tue, 16 Aug 2016 20:32:18 +0200
Subject: [PATCH 1/4] Require Go 1.6 or greater

---
 .travis.yml  | 12 +++---------
 README.md    |  2 +-
 appveyor.yml |  4 ++--
 build.go     |  4 ++++
 4 files changed, 10 insertions(+), 12 deletions(-)

diff --git a/.travis.yml b/.travis.yml
index 8fb856614..ca30a0443 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -2,10 +2,8 @@ language: go
 sudo: false
 
 go:
-  - 1.3.3
-  - 1.4.3
-  - 1.5.4
-  - 1.6.2
+  - 1.6.3
+  - 1.7
 
 os:
   - linux
@@ -14,11 +12,7 @@ os:
 matrix:
   exclude:
     - os: osx
-      go: 1.3.3
-    - os: osx
-      go: 1.4.3
-    - os: osx
-      go: 1.5.4
+      go: 1.6.3
 
 notifications:
   irc:
diff --git a/README.md b/README.md
index 5a90d0c17..2f40c4335 100644
--- a/README.md
+++ b/README.md
@@ -22,7 +22,7 @@ latest released version.
 Build restic
 ============
 
-Install Go/Golang (at least version 1.3), then run `go run build.go`,
+Install Go/Golang (at least version 1.6), then run `go run build.go`,
 afterwards you'll find the binary in the current directory:
 
     $ go run build.go
diff --git a/appveyor.yml b/appveyor.yml
index 7b2720df0..b7f50492d 100644
--- a/appveyor.yml
+++ b/appveyor.yml
@@ -13,8 +13,8 @@ init:
 
 install:
   - rmdir c:\go /s /q
-  - appveyor DownloadFile https://storage.googleapis.com/golang/go1.6.1.windows-amd64.msi
-  - msiexec /i go1.6.1.windows-amd64.msi /q
+  - appveyor DownloadFile https://storage.googleapis.com/golang/go1.7.windows-amd64.msi
+  - msiexec /i go1.7.windows-amd64.msi /q
   - go version
   - go env
   - appveyor DownloadFile http://sourceforge.netcologne.de/project/gnuwin32/tar/1.13-1/tar-1.13-1-bin.zip -FileName tar.zip
diff --git a/build.go b/build.go
index 9e9e595cd..166aee384 100644
--- a/build.go
+++ b/build.go
@@ -278,6 +278,10 @@ func (cs Constants) LDFlags() string {
 }
 
 func main() {
+	if runtime.Version() < "go1.6" {
+		fmt.Fprintf(os.Stderr, "old version of Go detected (%v), I'll try but no guarantees\n", runtime.Version())
+	}
+
 	buildTags := []string{}
 
 	skipNext := false

From 2fa93b291a40a782ae10b5b7f5fb42be0f6c98e9 Mon Sep 17 00:00:00 2001
From: Alexander Neumann <alexander@bumpern.de>
Date: Tue, 16 Aug 2016 20:51:31 +0200
Subject: [PATCH 2/4] Update default Go version in Dockerfile

---
 Dockerfile | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/Dockerfile b/Dockerfile
index c3f40bcbf..b7035f842 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -18,7 +18,7 @@
 
 FROM ubuntu:14.04
 
-ARG GOVERSION=1.6
+ARG GOVERSION=1.7
 ARG GOARCH=amd64
 
 # install dependencies

From c88c48a29f68f1fbe245e1304df6e3a708ea2db0 Mon Sep 17 00:00:00 2001
From: Alexander Neumann <alexander@bumpern.de>
Date: Tue, 16 Aug 2016 20:51:46 +0200
Subject: [PATCH 3/4] Do not build toolchain with gox for Go >= 1.5

---
 run_integration_tests.go | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/run_integration_tests.go b/run_integration_tests.go
index 7c727d743..3f98c64cd 100644
--- a/run_integration_tests.go
+++ b/run_integration_tests.go
@@ -191,8 +191,7 @@ func (env *TravisEnvironment) Prepare() error {
 
 		msg("gox: OS/ARCH %v\n", env.goxOSArch)
 
-		v := runtime.Version()
-		if !strings.HasPrefix(v, "go1.5") && !strings.HasPrefix(v, "go1.6") {
+		if runtime.Version() < "go1.5" {
 			err := run("gox", "-build-toolchain",
 				"-osarch", strings.Join(env.goxOSArch, " "))
 

From 043424824c0616a30209518461e9fcd3b95f388f Mon Sep 17 00:00:00 2001
From: Alexander Neumann <alexander@bumpern.de>
Date: Tue, 16 Aug 2016 21:02:30 +0200
Subject: [PATCH 4/4] Only test cross-compilation on Go 1.7

---
 run_integration_tests.go | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/run_integration_tests.go b/run_integration_tests.go
index 3f98c64cd..528d91917 100644
--- a/run_integration_tests.go
+++ b/run_integration_tests.go
@@ -168,7 +168,7 @@ func (env *TravisEnvironment) Prepare() error {
 		}
 	}
 
-	if *runCrossCompile {
+	if *runCrossCompile && !(runtime.Version() < "go1.7") {
 		// only test cross compilation on linux with Travis
 		if err := run("go", "get", "github.com/mitchellh/gox"); err != nil {
 			return err
@@ -317,7 +317,7 @@ func (env *TravisEnvironment) RunTests() error {
 
 	env.env["GOPATH"] = cwd + ":" + filepath.Join(cwd, "vendor")
 
-	if *runCrossCompile {
+	if *runCrossCompile && !(runtime.Version() < "go1.7") {
 		// compile for all target architectures with tags
 		for _, tags := range []string{"release", "debug"} {
 			runWithEnv(env.env, "gox", "-verbose",