Merge pull request #767 from SethTisue/travis-terminate

add travis_terminates as recommended by Dale

Author: dwijnand

travis/default.yml

@@ -16,9 +16,9 @@ before_install:
   # Travis-CI has (as of March 2021, anyway) an outdated sbt-extras version,
   # so overwrite it with a March 2021 version that works with sbt 1.4.8+
   - |
-    curl -sL https://raw.githubusercontent.com/paulp/sbt-extras/dc4f350f112580fcdf5f6fa7e8d5d2116475f84a/sbt  > /tmp/sbt-launch-script
-    chmod +x /tmp/sbt-launch-script
-    sudo mv /tmp/sbt-launch-script /usr/local/bin/sbt
+    curl -sL https://raw.githubusercontent.com/paulp/sbt-extras/dc4f350f112580fcdf5f6fa7e8d5d2116475f84a/sbt  > /tmp/sbt-launch-script || travis_terminate 1
+    chmod +x /tmp/sbt-launch-script || travis_terminate 1
+    sudo mv /tmp/sbt-launch-script /usr/local/bin/sbt || travis_terminate 1
 
 before_cache:
   - rm -fv $HOME/.ivy2/.sbt.ivy.lock