Writing a recipe for bzip2

[Нестор Янчук]

Hello. I am trying to write a recipe to compile python with bzip support.

Currently, i have this as a recipe for bzip:

from pythonforandroid.toolchain import Recipe, current_directory, shprint

from os.path import join, realpath

import sh

from pythonforandroid.recipe import CompiledComponentsPythonRecipe

class Bz2Recipe(CompiledComponentsPythonRecipe):

    url = 'https://github.com/nemequ/bzip2/releases/download/v{version}/bzip2-{version}.tar.gz'

    version = '1.0.6'

    md5sum = '00B516F4704D4A7CB50A1D97E6E8E15B'.lower()

    # call_hostpython_via_targetpython = True

    install_in_hostpython = True

    depends = []

    def should_build(self, arch):

        return True

    def build_arch(self, arch):

        with current_directory(self.get_build_dir(arch.arch)):

            env = arch.get_env()

            mkfile = open('Makefile-libbz2_so', 'r').read()

            with open('Makefile', 'w') as fp:

                mkfile = mkfile.replace(

                    "$(CC) -shared -Wl,-soname -Wl,libbz2.so.1.0 -o libbz2.so.{v} $(OBJS)".format(v=self.version),

                    "$(CC) -fPIC -fpic -shared -Wl,-soname -Wl,libbz2.so -o libbz2.so $(OBJS)",

                ).replace(

                    "PREFIX=/usr/local",

                    "PREFIX=" + realpath('.')

                )

                fp.write(mkfile)

            shprint(sh.make, _env=env)

            self.install_libs(arch, 'libbz2.so')

    def include_flags(self, arch):

        bz2_includes = join(self.get_build_dir(arch.arch), 'include')

        return (' -I' + bz2_includes)

    def link_dirs_flags(self, arch):

        return ' -L' + self.get_build_dir(arch.arch) + ' -L' + self.get_build_dir(arch.arch) + '/lib'

    def link_libs_flags(self):

        return ' -lbz2'

    def get_recipe_env(self, arch):

        env = super(Bz2Recipe, self).get_recipe_env(arch)

        env['NDK_PROJECT_PATH'] = self.get_build_dir(arch.arch)

        return env

recipe = Bz2Recipe()

And I have modified recipe for python3, so now it looks like this:

import sh

from pythonforandroid.python import GuestPythonRecipe

from pythonforandroid.recipe import Recipe

from pythonforandroid.logger import info

class Python3Recipe(GuestPythonRecipe):

    '''

    The python3's recipe.

    .. note:: This recipe can be built only against API 21+. Also, in order to

        build certain python modules, we need to add some extra recipes to our

        build requirements:

            - ctypes: you must add the recipe for ``libffi``.

    .. versionchanged:: 0.6.0

        Refactored into class

        :class:`~pythonforandroid.python.GuestPythonRecipe`

    '''

    version = '3.7.1'

    url = 'https://www.python.org/ftp/python/{version}/Python-{version}.tgz'

    name = 'python3'

    patches = ["patches/fix-ctypes-util-find-library.patch"]

    if sh.which('lld') is not None:

        patches = patches + ["patches/remove-fix-cortex-a8.patch"]

    depends = ['hostpython3', 'sqlite3', 'openssl', 'libffi', 'bz2']

    conflicts = ['python3crystax', 'python2']

    configure_args = (

        '--host={android_host}',

        '--build={android_build}',

        '--enable-shared',

        '--enable-ipv6',

        'ac_cv_file__dev_ptmx=yes',

        'ac_cv_file__dev_ptc=no',

        '--without-ensurepip',

        'ac_cv_little_endian_double=yes',

        '--prefix={prefix}',

        '--exec-prefix={exec_prefix}')

    def should_build(self, arch):

        return True

    def set_libs_flags(self, env, arch):

        env = super(Python3Recipe, self).set_libs_flags(env, arch)

        def add_flags(include_flags, link_dirs, link_libs):

            env['CPPFLAGS'] = env.get('CPPFLAGS', '') + include_flags

            env['LDFLAGS'] = env.get('LDFLAGS', '') + link_dirs

            env['LIBS'] = env.get('LIBS', '') + link_libs

        if 'openssl' in self.ctx.recipe_build_order:

            recipe = Recipe.get_recipe('openssl', self.ctx)

            self.configure_args += \

                ('--with-openssl=' + recipe.get_build_dir(arch.arch),)

        if 'bz2' in self.ctx.recipe_build_order:

            info('Activating flags for bz2')

            recipe = Recipe.get_recipe('bz2', self.ctx)

            add_flags(recipe.include_flags(arch),

                      recipe.link_dirs_flags(arch),

                      recipe.link_libs_flags()

                      )

        return env

recipe = Python3Recipe()

But still i`m getting this error on my android device:

ModuleNotFoundError: No module named '_bz2'

For now I'm stuck and don't know what to do, because I do not have much experience with c/c++ and compiling stuff. Can you help me finish this?