Require Go 1.6 or greater

.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:

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

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

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