python-android

python build for kolibri-android-wrapper

To generete the python build python_27.zip and python_extras_27.zip, run the following commands:

sudo docker build -t androidpython .
container_id=`sudo docker create androidpython`
sudo docker cp $container_id:/python-android27/python_27.zip . 
sudo docker cp $container_id:/python-android27/python_extras_27.zip .

To generate non-PIE python build, please reference the upstream flag settings.

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Tips:

• how to bring up interactive python via adb:

cd <path_to_your_sdk>/platform-tools
./adb shell
run-as com.android.kolibri27
export PYTHONHOME=/data/data/com.android.kolibri27/files/python
export PYTHONPATH=/sdcard/com.android.kolibri27/extras/python:/data/data/com.android.kolibri27/files/python/lib/python2.7/lib-dynload:/data/data/com.android.kolibri27/files/python/lib/python2.7
export PATH=$PYTHONHOME/bin:$PATH
export LD_LIBRARY_PATH=$LD_LIBRARY_PATH:/data/data/com.android.kolibri27/files/python/lib:/data/data/com.android.kolibri27/files/python/lib/python2.7/lib-dynload
python

• To check if a file is PIE enabled in Ubuntu:

sudo apt-get install hardening-includes
hardening-check <file path>

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Current progress:

1. Able to generate a minimum PIE enabled python_27.zip, meaning when install on android, we can bring up the interactive python via adb, but lack some python libs to start Kolibri.
2. Not able to generate python_extras_27.zip yet, still working on it.

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Current status(We need to get the status as close as possible to the upstream status):

Python build finished, but the necessary bits to build these modules were not found:

_bsddb             _curses            _curses_panel   
_tkinter           bsddb185           bz2             
dbm                dl                 gdbm            
imageop            linuxaudiodev      nis             
ossaudiodev        readline           sunaudiodev     

To find the necessary bits, look in setup.py in detect_modules() for the module's name.


Failed to build these modules:

_bisect            _codecs_cn         _codecs_hk      
_codecs_iso2022    _codecs_jp         _codecs_kr      
_codecs_tw         _collections       _csv            
_ctypes            _ctypes_test       _elementtree    
_functools         _hashlib           _heapq          
_hotshot           _io                _json           
_locale            _lsprof            _multibytecodec 
_multiprocessing   _random            _sha256         
_sha512            _socket            _sqlite3        
_ssl               _struct            _testcapi       
array              audioop            binascii        
cmath              cPickle            crypt           
cStringIO          datetime           fcntl           
future_builtins    grp                itertools       
math               mmap               operator        
parser             pyexpat            resource        
select             spwd               strop           
syslog             termios            time            
unicodedata        zlib    

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Upstream status(the current progress of the upstream):

Python build finished, but the necessary bits to build these modules were not found:

_bsddb             _curses            _curses_panel
_tkinter           bsddb185           bz2
dbm                dl                 gdbm
imageop            linuxaudiodev      nis
ossaudiodev        readline           sunaudiodev

To find the necessary bits, look in setup.py in detect_modules() for the module's name.


Failed to build these modules:

_ctypes_test       _locale            audioop
grp                spwd

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Reference: http://code.google.com/p/python-for-android/

./bootstrap.sh

Downloads Python-2.7.2 source
patches Python for android
builds hostpython and hostpgen

./build.sh

builds python library for android

./package.sh

creates python_rxx.zip and python_extras_rxx.zip

./pip_install.sh

install python packages using pip.

example:

    ./pip_install.sh python-twitter

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Eli's journey(use as referenece, no need to follow exactly)

1. I installed the following packages:

   sudo apt-get install build-essential bison flex autoconf automake autotools-dev quilt libcurl3 curl openssh-server ant mercurial filezilla pure-ftpd dpatch texinfo libncurses5-dev libgmp3-dev libmpfr-dev gawk patchutils binutils-dev zlib1g-dev 
   

   and

   sudo apt-get install git-core gnupg gperf libc6-dev x11proto-core-dev libx11-dev libgl1-mesa-dev g++-multilib mingw32 tofrodos python-markdown libxml2-utils xsltproc libreadline-dev libreadline6 ia32-libs-multiarch libzip-dev libzip-dev libzzip-dev libzzip-0-13
   

2. I'm using ubuntu ubuntu-14.04.5-desktop-amd64.iso (64-bit)

3. With gcc-4.8

4. android-ndk-r13b

5. andriod-sdk-linux

6. the site.py file inside python_extras_27.zip won't work, a work around for now is to replace it with the site.py from android-python27 project.

7. Under android-ndk-r13b/toolchains/ need to rename everything to something-4.4.3

8. Under android-ndk-r13b/toolchains/x86_64-4.4.3/prebuilt/linux-x86_64/bin/ need to rename x86_64-linux-android-gcc to x86_64-gcc; x86_64-linux-android-g++ to x86_64-g++; x86_64-linux-android-strip to x86_64-strip

9. Under android-ndk-r13b/toolchains/aarch64-linux-android-4.4.3/prebuilt/linux-x86_64/bin/ need to rename aarch64-linux-android-g++ to aarch64-g++; aarch64-linux-android-gcc to aarch64-gcc; aarch64-linux-android-strip to aarch64-strip

10. Make openssl/AndroidManifest.xml minSdkVersion=24

11. In order to compile openssl successfully and generate libcrypt.so, libcrypto.so, libsqlite3.so, libssl.so that are required to run python on android, we need to modify android-ndk-r13b/build/core/default-build-commands/mk, find around line 113 and change to TARGET_LDLIBS:= -lz -lc -lm. After we got thoese share libraries, restore the change to TARGET_LDLIBS:= -lc -lm, and continue to build the python. It's a bit tricky to get both python and these shared libraries built at one shoot. Sometimes you may want to prepare two envirenment to build them separately.