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+Environment setup in debian:jessie
+==================================
+
+basically you need this to setup your environment:
+
+# apt-get install mingw-w64
+# apt-get install wine
+# apt-get install nsis
+
+this is a incomplete list of dependencies, review the pyinstaller/Dockerfile
+to get a understanding of what needs to be setup in order to have a
+environment that builds the installer
+
+Requirements
+============
+
+docker-compose
+
+Building the package
+====================
+
+make pkg
+
+
+Reproducible builds
+===================
+
+please run the binary and installer builds on a clean machine eg
+using docker or any virtual environment that can easily be prepared
+by a third party to verify that the binaries are actually what the
+sourcecode suggests.
+
+to use reproducible build you need to install docker which then installs
+a clean debian:jessie to install nsis or the mingw environment
+
+
+Installer
+=========
+
+NSIS was choosen because it provided a out of the box toolchain to build
+installers for the windows platform with minimal dependencies. The downside
+of nsis is that it does not produce msi binaries
+
+to build the binary dependencies run:
+
+```
+docker-compose run --rm openvpn
+docker-compose run --rm pyinstaller
+```
+
+the produced binaries will be stored in ${ROOT}/build
+
+to build the installer run:
+
+```
+docker-compose run --rm installer
+```
+
+the produced installer will be stored in ${ROOT}/dist
+
+
+Pyinstaller
+===========
+
+Pyinstaller is a docker image based on debian:jessie with a cross-compile
+toolchain (gcc) for building zlib and openssl in linux and wine (staging)
+with installed python and mingw32 for pip/wheel compiling.
+All pip installed dependencies are
+part of the pyinstaller-build.sh script so they can be re-executed when the
+dependencies of the project change. The image should be rebuild when openssl,
+python or pyinstaller is updated:
+
+```
+docker-compose build pyinstaller
+```
+
+To debug or fine-tune the compile process it may be useful to setup the
+following software on the development machine:
+
+```
+X :1 -listen tcp
+DISPLAY=:1 xhost +
+docker-compose run --rm pyinstaller /bin/bash
+root@0fa19215321f:/# export DISPLAY=${YOUR_LOCAL_IP}:1
+root@0fa19215321f:/# wine cmd
+Z:\>python
+>>>
+```
+
+the configured volumes are:
+
+- the (read-only) sourcecode of the bitmask project in /var/src/bitmask
+- the result of the builds in /var/build
+
+pyinstaller-build.sh
+====================
+
+Contains all steps to build the win32 executables. The project relies on
+a read-write source tree which will pollute the development environment and
+make it hard to reproduce 'clean' builds. therefore it expects that the source
+is freshly checked out and not used to run in the host-environment. Otherwise
+pyc and ui elements will mess up the binary in unpredictable ways.
+
+* copy the /var/src/bitmask sources to a read-write location (/var/build)
+* execute ```make all``` in wine to build the qt ui and other resources
+* execute ```pip install $dependencies``` to have all dependencies available
+* execute ```pyinstaller``` in wine to compile the executable for
+** bitmask (src/leap/bitmask/app.py)
+* cleanup
+** remove the read-write copy
+** remove wine-dlls from the installer
+
+As the step 'install dependencies' may take long on slow internet connections
+during development it is advised to recycle the container and share the
+build/executables path with a windows-vm to test the result in short cycles
+instead of make pkg, uninstall, install.
+
+```
+docker-compose run --rm --entrypoint=/bin/bash pyinstalle
+root@0fa19215321f:/# cd /var/src/bitmask/pkg/windows
+root@0fa19215321f:/var/src/bitmask/pkg/windows# ./pyinstaller-build.sh
+root@0fa19215321f:/var/src/bitmask/pkg/windows# ./pyinstaller-build.sh
+root@0fa19215321f:/var/src/bitmask/pkg/windows# ./pyinstaller-build.sh
+....
+```
+
+and test the result binary (accessible in bitmask/build in a separate vm.
+
+OpenVPN
+=======
+
+OpenVPN is a straight forward cross compile image that builds the openvpn
+sourcecode from the git-repository to a windows executable that can be
+used by bitmask_root to launch eip.
+It needs to be rebuild regulary as openssl gets a new version about every
+month. PyInstaller uses the openssl that is compiled by this image
+
+Installer
+=========
+
+Installer is a straight forward debian image with makensis installed. The
+installer-build script lists the previously built files from pyinstaller and
+openvpn to pass it as nsh file to makensis. bitmask.nis controls what will
+be displayed to the user and how the components are installed and uninstalled
+\ No newline at end of file