Only run PR build, not the branch build (#1656)

* Only run PR build, not the branch build

* add a check to see if a pull request is open for a branch

* trigger test again

* add some logging to the bash

* revert

* :(

* :(

* :( :( :(

* :)

* Here's hoping

* try again

* try again

* Trying the fix suggested by travis

* Add message for branch tests

* magical semicolon?

* remove oraclejdk8 tests

.travis.yml

@@ -1,4 +1,4 @@
-dist: trusty
+dist: xenial
 language: java
 before_cache:
   - rm -f $HOME/.gradle/caches/modules-2/modules-2.lock
@@ -12,10 +12,18 @@ env:
     - RUN_BARCLAY_TESTS=true
     - RUN_BARCLAY_TESTS=false
 jdk:
-  - oraclejdk8
+  # oraclejdk8  - Xenial does not support oraclejdk8
   - openjdk8
   - openjdk11
 before_install:
+  #skip push builds if there's an associated PR because we don't look at them anway
+  - if [[ ${TRAVIS_EVENT_TYPE} == push ]]; then
+      PULL_REQUESTS=$( scripts/travis/check_for_pull_request );
+      if [[ $( grep -c "commits" <<< ${PULL_REQUESTS} ) -gt 0 ]]; then
+        echo "WARNING TEST SKIPPED. TESTS DO NOT RUN ON BRANCHES WITH OPEN PULL REQUESTS. SEE PULL REQUEST FOR TEST RESULTS";
+        travis_terminate 0;
+      fi;
+    fi;
   - wget -q -O - https://dl.google.com/linux/linux_signing_key.pub | sudo apt-key add -
   - sudo apt-get -qq update
   - sudo apt-get install -y --no-install-recommends r-base-dev r-recommended qpdf

scripts/travis/check_for_pull_request

@@ -0,0 +1,4 @@
+#!/usr/bin/env bash
+
+#query github for information about a specific pull request
+curl -v -H "Authorization: token $GITHUB_API_TOKEN" https://api.github.com/repos/broadinstitute/picard/pulls\?state\=open\&head="broadinstitute:${TRAVIS_BRANCH}"