Add PRE_COMMIT job on travis. (#60)

* Add PRE_COMMIT job on travis.

* Update the main README to triger the travis-ci.

Author: Xreki

.travis.yml

@@ -5,6 +5,8 @@ dist: trusty
 
 os:
   - linux
+env:
+  - JOB=PRE_COMMIT
 
 addons:
   apt:
@@ -15,14 +17,22 @@ addons:
       - python2.7-dev
   ssh_known_hosts: 52.76.173.135
 
+before_install:
+  - sudo pip install -U virtualenv pre-commit pip
+
 script:
+  - exit_code=0
+  - .travis/pre_commit.sh || exit_code=$(( exit_code | $? ))
   - |
     if [[ "$TRAVIS_PULL_REQUEST" != "false" ]]; then exit 0; fi;
     if [[ "$TRAVIS_BRANCH" != "develop"  && ! "$TRAVIS_BRANCH" =~ ^v[[:digit:]]+\.[[:digit:]]+(\.[[:digit:]]+)?(-\S*)?$ ]]; then echo "not develop branch, no deploy"; exit 0; fi;
     export DEPLOY_DOCS_SH=https://raw.githubusercontent.com/PaddlePaddle/PaddlePaddle.org/master/scripts/deploy/deploy_docs.sh
     export MOBILE_DIR=`pwd`
     cd ..
     curl $DEPLOY_DOCS_SH | bash -s $CONTENT_DEC_PASSWD $TRAVIS_BRANCH $MOBILE_DIR
+    exit_code=$(( exit_code | $? ))
+    exit $exit_code
+
 notifications:
   email:
     on_success: change

.travis/pre_commit.sh

@@ -0,0 +1,24 @@
+#!/bin/bash
+function abort(){
+    echo "Your commit not fit PaddlePaddle code style" 1>&2
+    echo "Please use pre-commit scripts to auto-format your code" 1>&2
+    echo "Install pre-commit following 2 steps:" 1>&2
+    echo "1> pip install pre-commit" 1>&2
+    echo "2> pre-commit install (under the Mobile repo)" 1>&2
+    exit 1
+}
+
+trap 'abort' 0
+set -e
+cd `dirname $0`
+cd ..
+export PATH=/usr/bin:$PATH
+pre-commit install
+
+if ! pre-commit run -a ; then
+  ls -lh
+  git diff  --exit-code
+  exit 1
+fi
+
+trap : 0

README.md

@@ -10,7 +10,7 @@ Here mainly describes how to deploy PaddlePaddle to the mobile end, as well as s
 - [How to build PaddlePaddle mobile inference library with minimum size.](./deployment/library/build_for_minimum_size.md)
 
 ## Demo
-- [An inference demo program based on the Paddle C API.](./benchmark/tool/C/README.md)
+- [A command-line inference demo.](./benchmark/tool/C/README.md)
 - [iOS demo of AICamera](./Demo/iOS/AICamera/README.md)
 
 ## Deployment optimization methods