Merge pull request #73 from matthew-brett/keep-alive

Keep alive: disable w/out env

.travis.yml

@@ -11,11 +11,15 @@ cache:
   directories:
    - $HOME/.ccache
 
+env:
+  global:
+    - MB_KEEP_ALIVE=1
+
 matrix:
   allow_failures:
-  - osx_image: xcode8.3
-    env:
-      - PYTHON_VERSION=3.5
+    - osx_image: xcode8.3
+      env:
+        - PYTHON_VERSION=3.5
   include:
     - os: linux
       dist: precise

common_utils.sh

@@ -18,10 +18,12 @@ if [ $(uname) == "Darwin" ]; then IS_OSX=1; fi
 # https://github.com/direnv/direnv/issues/210
 shell_session_update() { :; }
 
-# Start a process that runs as a keep-alive
-# to avoid travis quitting if there is no output
+if [ -n "$MB_KEEP_ALIVE" ]; then
+    # Start a process that runs as a keep-alive
+    # to avoid travis quitting if there is no output
 
-(while true; do >&2 echo "Travis-CI keep-alive"; sleep 480; done) &
+    (while true; do >&2 echo "Travis-CI keep-alive"; sleep 480; done) &
+fi
 
 function abspath {
     python -c "import os.path; print(os.path.abspath('$1'))"