Bundle-python » History » Revision 15
Revision 14 (Saúl Ibarra Corretgé, 02/13/2015 09:59 AM) → Revision 15/44 (Saúl Ibarra Corretgé, 02/16/2015 10:44 AM)
h1. Building a Python Framework to bundle inside Blink In order to avoid using the system Python a custom Framework build is needed. Using a bundled Python version will make the package bigger in size, but all package versions are controlled and not up to the environment. Also, we can use the latest Python version, with latest bugfixes and features, since Apple only updates the system Python version on every major OS release. The following instructions only apply for 64bit builds, 32bit builds are no longer supported. h2. Building the Python Framework itself * Download the desired Python version, at the time of this writing, 2.7.9 <pre> wget http://python.org/ftp/python/2.7.9/Python-2.7.9.tar.bz2 </pre> * Uncompress and get ready to compile <pre> tar jxvf Python-2.7.9.tar.bz2 cd Python-2.7.9 </pre> * Create a temporary directory for the build result <pre> mkdir -p /tmp/py </pre> * Compile Python (Framework build) with compatibility for OSX >= 10.9 <pre> ./configure --prefix=/tmp/py --enable-framework=/tmp/py MACOSX_DEPLOYMENT_TARGET=10.9 make make install </pre> The resulting framework will be located in /tmp/py * Change the dynamic link target in the main binary file of the Python Framework <pre> cd /tmp/py/Python.framework/Versions/2.7 chmod +w Python install_name_tool -id @executable_path/../Frameworks/Python.framework/Versions/2.7/Python Python chmod -w Python </pre> The framework is almost ready for inclusion on the project. *NOTE*: Be careful when copying the framework around, it contains symlinks and if @cp -r@ is used the size will we doubled, use @cp -RH@ instead. * Reduce the size of the Python Framework: There are a number of things that can (and must when submitting a sandbox app to Mac App Store) be removed from the framework directory to make it smaller in size: <pre> *.pyc *.pyo Versions/Current/lib/python2.7/config/python.o Versions/Current/Mac Versions/Current/bin Versions/Current/share Versions/Current/Resources/English* Versions/Current/Resources/*.app Versions/Current/lib/python2.7/test Versions/Current/lib/python2.7/plat-* Versions/Current/lib/python2.7/idlelib Versions/Current/lib/python2.7/curses Versions/Current/lib/python2.7/lib2to3 Versions/Current/lib/python2.7/lib-tk Versions/Current/lib/python2.7/bsddb </pre> * Prevent system paths from being used with this bundle Edit @Versions/Current/lib/python2.7/site.py@: Near the top of the file, locate the @ENABLE_USER_SITE@ variable, @Versions/Current/lib/python2.7/site.py@ and set it to False: <pre> ENABLE_USER_SITE = False </pre> Add add the following lines at the end on the @main()@ function body: <pre> # Remove system paths so that only things contained in this Framework are used sys.path = [x for x in sys.path if not x.startswith(('/System', '/Library', '/usr/local'))] '/Library'))] </pre> h2. Compiling PyObjC In order to get a PyObjC version that will work with the framework created above (Python 2.7, 64bits) an equivalent Python must be used to compile it. That is, if has to be a Python 2.7 version (it doesn't have to be the exact version) and it has to be a 64bit version. The MACOSX_DEPLOYMENT_TARGET must also be set to the appropriate value. PyObjcC can be installed with easy_install or pip. We install it in 2 steps to save some compilation time due to a bug in the build system: <pre> pip install pyobjc-core pip install pyobjc </pre> When compiling PyObjC a Python package will be created for every system framework, but not all of them are needed (at the moment), so just pick the ones we use: <pre> AddressBook AppKit Cocoa CoreFoundation Foundation JavaScriptCore LaunchServices PyObjCTools Quartz ScriptingBridge StoreKit WebKit objc </pre> *NOTE:* The _objc_ package is located inside a _PyObjC_ directory, just copy it from there, without the parent directory. *NOTE:* _PyObjCTools_ is not a valid Python package, as it lacks a @__init__.py@ file, an empty one needs to be manually created. h1. Creating a sandbox (Python virtualenv) <pre> sudo easy_install pip sudo pip install virtualenv virtualenvwrapper </pre> Add to ~.bashrc <pre> # Virtualenv export WORKON_HOME=$HOME/.virtualenvs export PIP_VIRTUALENV_BASE=$WORKON_HOME export PIP_RESPECT_VIRTUALENV=true export VIRTUALENVWRAPPER_SCRIPT=/usr/local/bin/virtualenvwrapper.sh [[ -f /usr/local/bin/virtualenvwrapper_lazy.sh ]] && source /usr/local/bin/virtualenvwrapper_lazy.sh </pre> Creating a sandbox: <pre> mkvirtualenv -p $(which python2.7) sandbox </pre> Exiting the sandbox: <pre> deactivate </pre> Entering the sandbox: <pre> workon sandbox </pre>