make sure travis sees some output in time

dhalbert · dhalbert · commit 58f230d63239 · 2018-12-05T15:01:58.000-05:00
diff --git a/.travis.yml b/.travis.yml
@@ -92,7 +92,9 @@ script:
   - make -C mpy-cross -j2
   - echo -en 'travis_fold:end:mpy-cross\\r'
 
-  - cd tools && python3 build_release_files.py
+  # Use unbuffered output because building all the releases can take a long time.
+  # Travis will cancel the job if it sees no output for >10 minutes.
+  - cd tools && python3 -u build_release_files.py
   - cd ..
 
   - echo 'Building unix' && echo -en 'travis_fold:start:unix\\r'
diff --git a/tools/build_release_files.py b/tools/build_release_files.py
@@ -71,6 +71,7 @@
         if travis:
             print('travis_fold:end:adafruit-bins-{}-{}\\r'.format(language, board))
 
-        print()
+        # Flush so travis will see something before 10 minutes has passed.
+        print(flush=True)
 
 sys.exit(exit_status)
