travis-ci: only run one round of the test suite on OSX

The OSX tests seem to run slower, they often timeout.  So only run
the test suite with the installed version of fdroid, instead of the
three rounds that ./complete-ci-tests does.

.travis.yml

@@ -19,6 +19,9 @@ matrix:
       env: ANDROID_SDK_ROOT=/usr/local/share/android-sdk
       env: ANDROID_HOME=/usr/local/share/android-sdk
 
+# On Ubuntu/trusty 14.04, the PPA is needed on to provide lots of the
+# dependencies, but this then also serves as a test of the PPA, which
+# is used on Windows Subsystem for Linux.
 addons:
   apt:
     sources:
@@ -46,15 +49,13 @@ android:
     - 'android-sdk-preview-.+'
     - 'android-sdk-license-.+'
 
-# the PPA is needed on Ubuntu 14.04 precise, and with python3, trusty too
-# the pip thing is a hack that can go away with trusty.
-#
 # * ensure java8 is installed since Android SDK doesn't work with Java9
 # * Java needs to be at least 1.8.0_131 to have MD5 properly disabled
 #   https://blogs.oracle.com/java-platform-group/oracle-jre-will-no-longer-trust-md5-signed-code-by-default
 #   https://opsech.io/posts/2017/Jun/09/openjdk-april-2017-security-update-131-8u131-and-md5-signed-jars.html
 install:
   - if [[ "$TRAVIS_OS_NAME" == "osx" ]]; then
+      set -x;
       brew update > /dev/null;
       brew install dash bash python3 gradle jenv;
       brew install gnu-sed --with-default-names;
@@ -86,11 +87,19 @@ install:
       which jarsigner;
       keytool -help;
       which keytool;
+      set +x;
     fi
 
+# The OSX tests seem to run slower, they often timeout.  So only run
+# the test suite with the installed version of fdroid, instead of the
+# three rounds that ./complete-ci-tests does.
 script:
   - cd tests
-  - ./complete-ci-tests
+  - if [[ "$TRAVIS_OS_NAME" == "osx" ]]; then
+      ./run-tests;
+    else
+      ./complete-ci-tests;
+    fi
 
 after_failure:
   - cd $TRAVIS_BUILD_DIR