ARROW-4078: [CI] Detect changes in docs/ directory and build the Linux Python entry if so

wesm · kou · commit abde663b2152 · 2018-12-27T10:24:00.000+09:00
Author: Wes McKinney <wesm+git@apache.org> Closes apache#3266 from wesm/ARROW-4078 and squashes the following commits: 395c496 <Wes McKinney> Detect changes in docs/ directory and build the Linux Python entry if so
diff --git a/.travis.yml b/.travis.yml
@@ -106,7 +106,7 @@ matrix:
     # TODO(wesm): Run the benchmarks outside of Travis
     # - ARROW_TRAVIS_PYTHON_BENCHMARKS=1
     before_script:
-    - if [ $ARROW_CI_PYTHON_AFFECTED != "1" ]; then exit; fi
+    - if [ $ARROW_CI_PYTHON_AFFECTED != "1" ] && [ $ARROW_CI_DOCS_AFFECTED != "1" ]; then exit; fi
     - $TRAVIS_BUILD_DIR/ci/travis_install_linux.sh
     - $TRAVIS_BUILD_DIR/ci/travis_install_clang_tools.sh
     - $TRAVIS_BUILD_DIR/ci/travis_install_toolchain.sh
diff --git a/ci/detect-changes.py b/ci/detect-changes.py
@@ -26,7 +26,7 @@
 
 perr = functools.partial(print, file=sys.stderr)
 
-LANGUAGE_TOPICS = ['c_glib', 'cpp', 'go', 'java', 'js', 'python',
+LANGUAGE_TOPICS = ['c_glib', 'cpp', 'docs', 'go', 'java', 'js', 'python',
                    'r', 'ruby', 'rust']
 
 ALL_TOPICS = LANGUAGE_TOPICS + ['integration', 'site', 'dev']
