Add Third Party Path back to TravisCI cache.

.travis.yml

@@ -4,6 +4,7 @@ cache:
   directories:
     - $HOME/.ccache
     - $HOME/.cache/pip
+    - $HOME/third_party
 sudo: required
 dist: trusty
 os:
@@ -41,7 +42,9 @@ before_install:
   - |
     function timeout() { perl -e 'alarm shift; exec @ARGV' "$@"; }
 script:
-  - paddle/scripts/travis/$JOB.sh
+  - |
+    timeout 2580 paddle/scripts/travis/${JOB}.sh  # 43min timeout
+    RESULT=$?; if [ $RESULT -eq 0 ] || [ $RESULT -eq 142 ]; then true; else false; fi;
 notifications:
   email:
     on_success: change

paddle/scripts/travis/build_doc.sh

@@ -6,12 +6,13 @@ mkdir -p $TRAVIS_BUILD_DIR/build
 cd $TRAVIS_BUILD_DIR/build
 
 # Compile Documentation only.
-cmake .. -DCMAKE_BUILD_TYPE=Debug -DWITH_GPU=OFF -DWITH_DOC=OFF -DWITH_STYLE_CHECK=OFF
+cmake .. -DCMAKE_BUILD_TYPE=Debug -DWITH_GPU=OFF -DWITH_DOC=OFF -DWITH_STYLE_CHECK=OFF -DTHIRD_PARTY_PATH=$HOME/third_party
+
 mkdir output
 make -j `nproc`
 find .. -name '*whl' | xargs pip install  # install all wheels.
 rm -rf *
-cmake .. -DCMAKE_BUILD_TYPE=Debug -DWITH_GPU=OFF -DWITH_DOC=ON
+cmake .. -DCMAKE_BUILD_TYPE=Debug -DWITH_GPU=OFF -DWITH_DOC=ON -DTHIRD_PARTY_PATH=$HOME/third_party
 make -j `nproc` paddle_docs paddle_docs_cn
 
 # check websites for broken links