Lazy install Paddle wheels

* install wheels when invoke paddle script if current python don't
  have paddle packages, or installed a previous version.
* Also add `make install` to travis

.travis.yml

@@ -29,6 +29,7 @@ before_install:
 script:
   - paddle/scripts/travis/build.sh
   - paddle/scripts/travis/unittest.sh
+  - paddle/scripts/travis/make_install.sh
 notifications:
   email:
     on_success: change

paddle/scripts/submit_local.sh.in

@@ -43,6 +43,40 @@ fi
 
 export PYTHONPATH=${PWD}:${PYTHONPATH}
 
+
+# Check python lib installed or not.
+pip --help > /dev/null
+if [ $? -ne 0 ]; then
+    echo "pip should be installed to run paddle."
+    exit 1
+fi
+
+INSTALLED_VERSION=`pip freeze 2>/dev/null | grep '^paddle' | sed 's/.*==//g'`
+
+if [ -z ${INSTALLED_VERSION} ]; then
+   INSTALLED_VERSION="0.0.0"  # not installed
+fi
+cat <<EOF | python -
+from distutils.version import LooseVersion
+import sys
+if LooseVersion("${INSTALLED_VERSION}") < LooseVersion("@PADDLE_VERSION@"):
+  sys.exit(1)
+else:
+  sys.exit(0)
+EOF
+
+if [ $? -eq 1 ]; then  # Older version installed, or not installed at all
+   echo "First time run paddle, need to install some python dependencies."
+   BASEDIR=$(dirname "$0")
+   pip install ${BASEDIR}/../opt/paddle/share/wheels/*.whl
+   if [ $? -ne 0 ]; then
+      echo "pip install wheels failed. "
+      echo "Please use 'sudo paddle' at the first time you use PaddlePaddle"
+      echo "PaddlePaddle will install some python dependencies automatically."
+   fi
+   echo "Python dependencies are installed."
+fi
+
 case "$1" in
     "train")
         ${DEBUGGER} $MYDIR/../opt/paddle/bin/paddle_trainer ${@:2}

paddle/scripts/travis/build.sh

 #!/bin/bash
-
 cd `dirname $0`
-cd ../../../
-set -e
-mkdir build
-cd build
+source ./common.sh
 cmake .. -DCMAKE_BUILD_TYPE=Debug -DWITH_GPU=OFF -DWITH_DOC=OFF -DWITH_TESTING=ON -DON_TRAVIS=ON
 make -j `nproc`

paddle/scripts/travis/common.sh

+#!/bin/bash
+set -e
+mkdir -p ../../../build
+cd ../../../build
+

paddle/scripts/travis/make_install.sh

+#!/bin/bash
+cd `dirname $0`
+source ./common.sh
+sudo make install
+sudo paddle version

paddle/scripts/travis/unittest.sh

 #!/bin/bash
-set -e
 cd `dirname $0`
-cd ../../../build
+source ./common.sh
 env CTEST_OUTPUT_ON_FAILURE=1 make test ARGS="-j `nproc`"
 

python/CMakeLists.txt

@@ -22,10 +22,6 @@ find_python_module(pip REQUIRED)
 find_python_module(wheel REQUIRED)
 find_python_module(google.protobuf REQUIRED)
 
-install(CODE "execute_process(COMMAND ${PYTHON_EXECUTABLE} setup.py install -f
-    WORKING_DIRECTORY
-    ${CMAKE_CURRENT_BINARY_DIR})")
-
 install(DIRECTORY ${CMAKE_CURRENT_BINARY_DIR}/dist/
     DESTINATION opt/paddle/share/wheels
 )