import contextlib
from os.path import exists, join
from os import getcwd, chdir, makedirs, walk, uname
import shutil
from fnmatch import fnmatch
from tempfile import mkdtemp
from pythonforandroid.logger import (logger, Err_Fore, error, info)


build_platform = '{system}-{machine}'.format(
    system=uname()[0], machine=uname()[-1]).lower()
"""the build platform in the format `system-machine`. We use
this string to define the right build system when compiling some recipes or
to get the right path for clang compiler"""


@contextlib.contextmanager
def current_directory(new_dir):
    cur_dir = getcwd()
    logger.info(''.join((Err_Fore.CYAN, '-> directory context ', new_dir,
                         Err_Fore.RESET)))
    chdir(new_dir)
    yield
    logger.info(''.join((Err_Fore.CYAN, '<- directory context ', cur_dir,
                         Err_Fore.RESET)))
    chdir(cur_dir)


@contextlib.contextmanager
def temp_directory():
    temp_dir = mkdtemp()
    try:
        logger.debug(''.join((Err_Fore.CYAN, ' + temp directory used ',
                              temp_dir, Err_Fore.RESET)))
        yield temp_dir
    finally:
        shutil.rmtree(temp_dir)
        logger.debug(''.join((Err_Fore.CYAN, ' - temp directory deleted ',
                              temp_dir, Err_Fore.RESET)))


def ensure_dir(filename):