How to use the bypy.utils.current_dir function in bypy

    @flush
    def add_python_framework(self):
        print('\nAdding Python framework')
        src = join(PREFIX + '/python', 'Python.framework')
        x = join(self.frameworks_dir, 'Python.framework')
        curr = os.path.realpath(join(src, 'Versions', 'Current'))
        currd = join(x, 'Versions', basename(curr))
        rd = join(currd, 'Resources')
        os.makedirs(rd)
        shutil.copy2(join(curr, 'Resources', 'Info.plist'), rd)
        shutil.copy2(join(curr, 'Python'), currd)
        self.set_id(join(currd, 'Python'),
                    self.FID + '/Python.framework/Versions/%s/Python' % basename(curr))
        # The following is needed for codesign in OS X >= 10.9.5
        with current_dir(x):
            os.symlink(basename(curr), 'Versions/Current')
            for y in ('Python', 'Resources'):
                os.symlink('Versions/Current/%s' % y, y)

def do_sign_app(appdir):
    appdir = os.path.abspath(appdir)
    with current_dir(os.path.join(appdir, 'Contents')):
        sign_MacOS()
        # Sign the sub application bundles
        sub_apps = list(find_sub_apps())
        sub_apps.append('Frameworks/QtWebEngineCore.framework/Versions/Current/Helpers/QtWebEngineProcess.app')
        for sa in sub_apps:
            sign_MacOS(os.path.join(sa, 'Contents'))
        codesign(sub_apps)

        # Sign all .so files
        so_files = {x for x in files_in('.') if x.endswith('.so')}
        codesign(so_files)

        # Sign everything in PlugIns
        with current_dir('PlugIns'):
            items = set(os.listdir('.'))
            codesign(expand_dirs(items))

appdir = os.path.abspath(appdir)
    with current_dir(os.path.join(appdir, 'Contents')):
        sign_MacOS()
        # Sign the sub application bundles
        sub_apps = list(find_sub_apps())
        sub_apps.append('Frameworks/QtWebEngineCore.framework/Versions/Current/Helpers/QtWebEngineProcess.app')
        for sa in sub_apps:
            sign_MacOS(os.path.join(sa, 'Contents'))
        codesign(sub_apps)

        # Sign all .so files
        so_files = {x for x in files_in('.') if x.endswith('.so')}
        codesign(so_files)

        # Sign everything in PlugIns
        with current_dir('PlugIns'):
            items = set(os.listdir('.'))
            codesign(expand_dirs(items))

        # Sign everything else in Frameworks
        with current_dir('Frameworks'):
            fw = set(glob('*.framework'))
            codesign(fw)
            items = set(os.listdir('.')) - fw
            codesign(expand_dirs(items))

    # Now sign the main app
    codesign(appdir)
    # Verify the signature
    run('codesign', '-vvv', '--deep', '--strict', appdir)
    run('spctl', '--verbose=4', '--assess', '--type', 'execute', appdir)

sub_apps.append('Frameworks/QtWebEngineCore.framework/Versions/Current/Helpers/QtWebEngineProcess.app')
        for sa in sub_apps:
            sign_MacOS(os.path.join(sa, 'Contents'))
        codesign(sub_apps)

        # Sign all .so files
        so_files = {x for x in files_in('.') if x.endswith('.so')}
        codesign(so_files)

        # Sign everything in PlugIns
        with current_dir('PlugIns'):
            items = set(os.listdir('.'))
            codesign(expand_dirs(items))

        # Sign everything else in Frameworks
        with current_dir('Frameworks'):
            fw = set(glob('*.framework'))
            codesign(fw)
            items = set(os.listdir('.')) - fw
            codesign(expand_dirs(items))

    # Now sign the main app
    codesign(appdir)
    # Verify the signature
    run('codesign', '-vvv', '--deep', '--strict', appdir)
    run('spctl', '--verbose=4', '--assess', '--type', 'execute', appdir)

    return 0

def sign_MacOS(contents_dir='.'):
    # Sign everything in MacOS except the main executable
    # which will be signed automatically by codesign when
    # signing the app bundles
    with current_dir(os.path.join(contents_dir, 'MacOS')):
        exe = get_executable('../Info.plist')
        items = {x for x in os.listdir('.') if x != exe and not os.path.islink(x)}
        if items:
            codesign(items)

sub_apps.append('Frameworks/QtWebEngineCore.framework/Versions/Current/Helpers/QtWebEngineProcess.app')
        for sa in sub_apps:
            sign_MacOS(os.path.join(sa, 'Contents'))
        codesign(sub_apps)

        # Sign all .so files
        so_files = {x for x in files_in('.') if x.endswith('.so')}
        codesign(so_files)

        # Sign everything in PlugIns
        with current_dir('PlugIns'):
            items = set(os.listdir('.'))
            codesign(expand_dirs(items))

        # Sign everything else in Frameworks
        with current_dir('Frameworks'):
            fw = set(glob('*.framework'))
            codesign(fw)
            items = set(os.listdir('.')) - fw
            codesign(expand_dirs(items))

    # Now sign the main app
    codesign(appdir)
    verify_signature(appdir)
    return 0

def add_qt_framework(self, f):
        libname = f
        f = f + '.framework'
        src = join(PREFIX, 'qt', 'lib', f)
        ignore = shutil.ignore_patterns('Headers', '*.h', 'Headers/*')
        dest = join(self.frameworks_dir, f)
        shutil.copytree(src, dest, symlinks=True,
                        ignore=ignore)
        lib = os.path.realpath(join(dest, libname))
        rpath = os.path.relpath(lib, self.frameworks_dir)
        self.set_id(lib, self.FID + '/' + rpath)
        self.fix_dependencies_in_lib(lib)
        # The following is needed for codesign in OS X >= 10.9.5
        # The presence of the .prl file in the root of the framework causes
        # codesign to fail.
        with current_dir(dest):
            for x in os.listdir('.'):
                if x != 'Versions' and not os.path.islink(x):
                    os.remove(x)

def add_qt_framework(self, f):
        libname = f
        f = f + '.framework'
        src = join(PREFIX, 'qt', 'lib', f)
        ignore = shutil.ignore_patterns('Headers', '*.h', 'Headers/*')
        dest = join(self.frameworks_dir, f)
        shutil.copytree(src, dest, symlinks=True,
                        ignore=ignore)
        lib = os.path.realpath(join(dest, libname))
        rpath = os.path.relpath(lib, self.frameworks_dir)
        self.set_id(lib, self.FID + '/' + rpath)
        self.fix_dependencies_in_lib(lib)
        # The following is needed for codesign in OS X >= 10.9.5
        # The presence of the .prl file in the root of the framework causes
        # codesign to fail.
        with current_dir(dest):
            for x in os.listdir('.'):
                if x != 'Versions' and not os.path.islink(x):
                    os.remove(x)