Use .go-version to specify the Go version for all CI builds

.appveyor.yml

@@ -7,7 +7,6 @@ os: Windows Server 2012 R2
 # Environment variables
 environment:
   GOPATH: c:\gopath
-  GVM_GO_VERSION: 1.8.1
   GVM_DL: https://github.com/andrewkroh/gvm/releases/download/v0.0.1/gvm-windows-amd64.exe
   PYWIN_DL: https://beats-files.s3.amazonaws.com/deps/pywin32-220.win32-py2.7.exe
   matrix:
@@ -25,7 +24,7 @@ clone_folder: c:\gopath\src\github.com\elastic\beats
 cache:
 - C:\ProgramData\chocolatey\bin -> .appveyor.yml
 - C:\ProgramData\chocolatey\lib -> .appveyor.yml
-- C:\Users\appveyor\.gvm -> .appveyor.yml
+- C:\Users\appveyor\.gvm -> .go-version
 - C:\Windows\System32\gvm.exe -> .appveyor.yml
 - C:\tools\mingw64 -> .appveyor.yml
 - C:\pywin_inst.exe -> .appveyor.yml
@@ -36,7 +35,7 @@ install:
       if(!(Test-Path "C:\Windows\System32\gvm.exe")) {
         wget "$env:GVM_DL" -Outfile C:\Windows\System32\gvm.exe
       }
-  - ps: gvm --format=powershell "$env:GVM_GO_VERSION" | Invoke-Expression
+  - ps: gvm --format=powershell $(Get-Content .go-version) | Invoke-Expression
   # AppVeyor installed mingw is 32-bit only so install 64-bit version.
   - ps: >-
       if(!(Test-Path "C:\tools\mingw64\bin\gcc.exe")) {

.go-version

@@ -0,0 +1 @@
+1.8.1

.travis.yml

@@ -12,73 +12,73 @@ env:
   global:
     # Cross-compile for amd64 only to speed up testing.
     - GOX_FLAGS="-arch amd64"
-    - DOCKER_COMPOSE_VERSION: 1.11.1
-    - &go_version 1.8.1
+    - DOCKER_COMPOSE_VERSION=1.11.1
+    - GO_VERSION="$(cat .go-version)"
 
 matrix:
   include:
     # General checks
     - os: linux
       env: TARGETS="check"
-      go: *go_version
+      go: $GO_VERSION
 
     # Filebeat
     - os: linux
       env: TARGETS="-C filebeat testsuite"
-      go: *go_version
+      go: $GO_VERSION
     - os: osx
       env: TARGETS="TEST_ENVIRONMENT=0 -C filebeat testsuite"
-      go: *go_version
+      go: $GO_VERSION
 
     # Heartbeat
     - os: linux
       env: TARGETS="-C heartbeat testsuite"
-      go: *go_version
+      go: $GO_VERSION
     - os: osx
       env: TARGETS="TEST_ENVIRONMENT=0 -C heartbeat testsuite"
-      go: *go_version
+      go: $GO_VERSION
 
     # Libbeat
     - os: linux
       env: TARGETS="-C libbeat testsuite"
-      go: *go_version
+      go: $GO_VERSION
     - os: linux
       env: TARGETS="-C libbeat crosscompile"
-      go: *go_version
+      go: $GO_VERSION
 
     # Metricbeat
     - os: linux
       env: TARGETS="-C metricbeat testsuite"
-      go: *go_version
+      go: $GO_VERSION
     - os: osx
       env: TARGETS="TEST_ENVIRONMENT=0 -C metricbeat testsuite"
-      go: *go_version
+      go: $GO_VERSION
     - os: linux
       env: TARGETS="-C metricbeat crosscompile"
-      go: *go_version
+      go: $GO_VERSION
 
     # Packetbeat
     - os: linux
       env: TARGETS="-C packetbeat testsuite"
-      go: *go_version
+      go: $GO_VERSION
 
     # Winlogbeat
     - os: linux
       env: TARGETS="-C winlogbeat crosscompile"
-      go: *go_version
+      go: $GO_VERSION
 
     # Dashboards
     - os: linux
       env: TARGETS="-C dev-tools/cmd/import_dashboards"
-      go: *go_version
+      go: $GO_VERSION
 
     # Generators
     - os: linux
       env: TARGETS="-C generator/metricbeat test"
-      go: *go_version
+      go: $GO_VERSION
     - os: linux
       env: TARGETS="-C generator/beat test"
-      go: *go_version
+      go: $GO_VERSION
 
 addons:
   apt:

dev-tools/common.bash

@@ -27,7 +27,7 @@ err()
 # Read the project's Go version and return it in the GO_VERSION variable.
 # On failure it will exit.
 get_go_version() {
-  GO_VERSION=$(awk '/^:go-version:/{print $NF}' "${_sdir}/../libbeat/docs/version.asciidoc")
+  GO_VERSION=$(cat "${_sdir}/../.go-version")
   if [ -z "$GO_VERSION" ]; then
     err "Failed to detect the project's Go version"
     exit 1