Fixes and documentation for building wheels (#56)

* Fix Python 3.5 compatibility

* Fix script to build wheels

* Add docs for building wheels

.gitignore

@@ -13,6 +13,7 @@ Cargo.lock
 __pycache__
 /env
 *.pyc
+dist
 
 # Editor files
 .vscode

python/README.md

@@ -0,0 +1,15 @@
+# ERDOS Python Interface
+
+## Building Wheels
+
+Use the [manylinux1](https://github.com/pypa/manylinux) docker container
+to generate wheels for ERDOS.
+
+Navigate to the project root and run the following command to build ERDOS
+wheels for x86-64:
+
+```console
+docker run -it -v $(pwd):/io quay.io/pypa/manylinux1_x86_64 bash io/python/build-wheels.sh
+```
+
+The wheels will appear in the `dist` folder in the project root.

python/build-wheels.sh

@@ -6,13 +6,13 @@ export PATH="$HOME/.cargo/bin:$PATH"
 
 cd /io
 
-for PYBIN in /opt/python/{cp27-cp27m,cp27-cp27mu,cp35-cp35m,cp36-cp36m,cp37-cp37m}/bin; do
+for PYBIN in /opt/python/{cp35-cp35m,cp36-cp36m,cp37-cp37m}/bin; do
     export PYTHON_SYS_EXECUTABLE="$PYBIN/python"
-
-    "${PYBIN}/pip" install -U setuptools wheel setuptools-rust
-    "${PYBIN}/python" setup.py bdist_wheel
+    # Require wheel==0.31.1 because auditwheel breaks on newer versions
+    "${PYBIN}/pip" install -U setuptools wheel==0.31.1 setuptools-rust
+    "${PYBIN}/python" python/setup.py bdist_wheel
 done
 
 for whl in dist/*.whl; do
     auditwheel repair "$whl" -w dist/
-done
+done