add build pip doc

docs/installation/wheel_build.md

@@ -0,0 +1,71 @@
+# How to build the wheel file
+
+## Intro
+
+In order to provide users a simpler way to install `Delta`, we need to
+build the Wheel file `.whl` and upload this wheel file to Pypi's
+website. Once we uploaded the wheel file, all that users need to do is
+typing `pip install delta-nlp`.
+
+**Notice**: installation by pip only supports NLP tasks now. If you need the
+full version of the Delta (with speech tasks), you should install the
+platform from source.
+
+## Prepare
+
+Before build the wheel file, you need to install the `DELTA` before.
+
+```bash
+bash ./tools/install/install-delta.sh nlp gpu
+```
+
+For linux wheel building, you will need the docker image:
+
+```bash
+docker pull didi0speech0nlu/delta_pip:tf2_ub16
+```
+
+## Start to build
+
+### MacOS
+
+```bash
+bash ./tools/install/build_pip_pkg.sh
+```
+
+The generated wheel will be under `dist` like
+`delta_nlp-0.2-cp36-cp36m-macosx_10_7_x86_64.whl`
+
+### Linux
+
+Wheel building in linux is more complicated. You need to run a docker 
+
+```bash
+docker run --name delta_pip_tf2_u16 -it -v $PWD:/delta  tensorflow/tensorflow:custom-op-ubuntu16 /bin/bash
+```
+
+In the docker environment, run:
+
+```bash
+bash ./tools/install/build_pip_pkg.sh
+```
+
+The generated wheel will be under `dist` like
+`delta_nlp-0.2-cp36-cp36m-linux_x86_64.whl`
+
+Repair the wheel file for multiple linux platform support:
+
+```bash
+auditwheel repair dist/xxx.whl
+```
+
+The final wheel will be under `wheelhouse` like
+`delta_nlp-0.2-cp36-cp36m-manylinux1_x86_64.whl`.
+
+## Upload
+
+After building the wheel file, upload these files to Pypi:
+
+```
+twine upload xxx.whl
+```

build_pip_pkg.sh → tools/install/build_pip_pkg.sh

@@ -6,5 +6,8 @@ echo "Uninstall ${PIP_NAME} if exist ..."
 pip3 uninstall -y ${PIP_NAME}
 
 echo "Build binary distribution wheel file ..."
+BASH_DIR=`dirname "$BASH_SOURCE"`
+pushd ${BASH_DIR}/../..
 rm -rf build/ ${PIP_NAME}.egg-info/ dist/
 python3 setup.py bdist_wheel
+popd