Copy protobuf header files and Eigen to the pip package.

Clarify the documentation on how to build using bazel.
Fixes #1270.
Change: 115701645

tensorflow/g3doc/how_tos/adding_an_op/index.md

@@ -145,8 +145,8 @@ $ g++ -std=c++11 -shared zero_out.cc -o zero_out.so \
 ### With TensorFlow source installation
 
 If you have TensorFlow sources installed, you can make use of TensorFlow's build
-system to compile your Op. The following Bazel build rule would build
-`zero_out.so`.
+system to compile your Op. Place a BUILD file with following Bazel build rule in
+the [`tensorflow/core/user_ops`][user_ops] directory.
 
 ```python
 cc_binary(
@@ -164,6 +164,12 @@ cc_binary(
 )
 ```
 
+Run the following command to build `zero_out.so`.
+
+```bash
+$ bazel build -c opt //tensorflow/core/user_ops:zero_out.so
+```
+
 ## Using the Op in Python
 
 TensorFlow Python API provides the

tensorflow/tools/pip_package/build_pip_package.sh

@@ -35,8 +35,14 @@ function main() {
   cp -R \
     bazel-bin/tensorflow/tools/pip_package/build_pip_package.runfiles/{tensorflow,external} \
     ${TMPDIR}
-  # TODO: We should have cleaner solution for this after 0.7 release
-  rm -rf ${TMPDIR}/external/eigen_archive
+  # protobuf pip package doesn't ship with header files. Copy the headers
+  # over so user defined ops can be compiled.
+  rsync --include "*/" --include "*.h" --exclude "*" --prune-empty-dirs -a \
+    bazel-bin/tensorflow/tools/pip_package/build_pip_package.runfiles/google \
+    ${TMPDIR}
+  rsync -a \
+    bazel-bin/tensorflow/tools/pip_package/build_pip_package.runfiles/third_party/eigen3 \
+    ${TMPDIR}/third_party
 
   cp tensorflow/tools/pip_package/MANIFEST.in ${TMPDIR}
   cp tensorflow/tools/pip_package/README ${TMPDIR}