Try again to fix push and build events (#162)

Author: giovtorres

.travis.yml

@@ -1,8 +1,5 @@
 sudo: required
 language: python
-branches:
-  only:
-    - master
 env:
   matrix:
     - SLURM=19.05.0 CYTHON=0.29.14 PYTHON=3.6
@@ -20,7 +17,8 @@ before_install:
   - docker run -d -it -h ernie --name slurm-$SLURM giovtorres/docker-centos7-slurm:$SLURM
 install: true
 before_script:
-  - docker exec slurm-$SLURM git clone --branch=$TRAVIS_BRANCH https://github.com/PySlurm/pyslurm.git
+  - docker exec slurm-$SLURM git clone https://github.com/PySlurm/pyslurm.git
+  - docker exec -e COMMIT=${TRAVIS_PULL_REQUEST_SHA:-$TRAVIS_BRANCH} slurm-$SLURM bash -c "cd /pyslurm && git checkout -qf $COMMIT"
   - docker exec -e PYTHON=$PYTHON -e CYTHON=$CYTHON slurm-$SLURM /pyslurm/scripts/build.sh
   - docker exec -e PYTHON=$PYTHON -e CYTHON=$CYTHON slurm-$SLURM /pyslurm/scripts/configure.sh
 script: