host_cffi: custom cffi module to be used within hostpython

.gitignore

@@ -2,6 +2,8 @@
 *.pyc
 *.pyo
 *.swp
+.project
+.pydevproject
 freetype-*
 build/*
 dist/*

README.rst

@@ -87,6 +87,7 @@ For a complete list of available commands, type::
 
     $ ./toolchain.py
 
+
 Create the Xcode project
 ------------------------
 
@@ -109,6 +110,7 @@ Then click on `Play`, and enjoy.
     the `<title>-ios/YourApp` directory. Don't make changes in the -ios
     directory directly.
 
+
 Configuring your App
 --------------------
 
@@ -123,6 +125,7 @@ launch environment.
     the 'export_orientation' function in 'main.m'. The XCode orientation
     settings should be set to support all. 
 
+
 FAQ
 ---
 
@@ -132,6 +135,7 @@ Fatal error: "stdio.h" file not found
 You must build with bitcode disabled (Xcode setting ENABLE_BITCODE should be No).
     We don't support bitcode. You need to go to the project setting, and disable bitcode.
 
+
 Support
 -------
 
@@ -146,6 +150,7 @@ We also have an IRC channel:
 * Port    : 6667, 6697 (SSL only)
 * Channel : #kivy
 
+
 Contributing
 ------------
 
@@ -165,6 +170,7 @@ IRC channel:
 * Port    : 6667, 6697 (SSL only)
 * Channel : #kivy-dev
 
+
 License
 -------
 

recipes/autobahn/__init__.py

@@ -0,0 +1,26 @@
+from os.path import join
+from toolchain import PythonRecipe
+from toolchain import shprint
+import os
+import sh
+
+
+class AutobahnRecipe(PythonRecipe):
+    name = "autobahn"
+    version = "0.16.0"
+    url = "https://github.com/crossbario/autobahn-python/archive/v{version}.zip"
+    depends = ["twisted", "six", "txaio"]
+
+    def install(self):
+        arch = list(self.filtered_archs)[0]
+        build_dir = self.get_build_dir(arch.arch)
+        os.chdir(build_dir)
+        hostpython = sh.Command(self.ctx.hostpython)
+        build_env = arch.get_env()
+        dest_dir = join(self.ctx.dist_dir, "root", "python")
+        pythonpath = join(dest_dir, 'lib', 'python2.7', 'site-packages')
+        build_env['PYTHONPATH'] = pythonpath
+        args = [hostpython, "setup.py", "install", "--prefix", dest_dir]
+        shprint(*args, _env=build_env)
+
+recipe = AutobahnRecipe()

recipes/cffi/__init__.py

@@ -0,0 +1,68 @@
+from os.path import join
+from toolchain import CythonRecipe
+from toolchain import shprint
+import os
+import sh
+
+
+class CffiRecipe(CythonRecipe):
+    depends = ["host_cffi"]
+    name = "cffi"
+    version = "1.8.3"
+    url = (
+        "https://pypi.python.org/packages/0a/f3/"
+        "686af8873b70028fccf67b15c78fd4e4667a3da995007afc71e786d61b0a/"
+        "cffi-{version}.tar.gz"
+    )
+    library = "libcffi.a"
+    depends = ["libffi", "host_setuptools", "pycparser"]
+    cythonize = False
+
+    def get_recipe_env(self, arch):
+        env = super(CffiRecipe, self).get_recipe_env(arch)
+        env["CC"] += " -I{}".format(
+            join(self.ctx.dist_dir, "include", arch.arch, "libffi"))
+        return env
+
+    def install(self):
+        arch = [arch for arch in self.filtered_archs if arch.arch == 'x86_64'][0]
+        build_dir = self.get_build_dir(arch.arch)
+        os.chdir(build_dir)
+        # manually create expected directory in build directory
+        scripts_dir = join("build", "scripts-2.7")
+        if not os.path.exists(scripts_dir):
+            os.makedirs(scripts_dir)
+        hostpython = sh.Command(self.ctx.hostpython)
+
+        # install cffi in hostpython
+        #
+        # XXX: installs, module import works, but FFI fails to instanciate:
+        #
+        # myhost:kivy-ios user$ ./dist/hostpython/bin/python
+        # Could not find platform dependent libraries <exec_prefix>
+        # Consider setting $PYTHONHOME to <prefix>[:<exec_prefix>]
+        # Python 2.7.1 (r271:86832, Nov  4 2016, 10:41:44)
+        # [GCC 4.2.1 Compatible Apple LLVM 7.3.0 (clang-703.0.31)] on darwin
+        # Type "help", "copyright", "credits" or "license" for more information.
+        # >>> import cffi
+        # >>> cffi.api.FFI()
+        # Traceback (most recent call last):
+        #   File "<stdin>", line 1, in <module>
+        #   File "/.../kivy-ios/dist/hostpython/lib/python2.7/site-packages/cffi/api.py", line 56, in __init__
+        #     import _cffi_backend as backend
+        # ImportError: dynamic module does not define init function (init_cffi_backend)
+        #
+        #r = self.get_recipe('hostlibffi', self.ctx)
+        #build_env = r.get_recipe_env(arch)
+        #args = [hostpython, "setup.py", "install"]
+        #shprint(*args, _env=build_env)
+
+        # install cffi in root site packages
+        build_env = arch.get_env()
+        dest_dir = join(self.ctx.dist_dir, "root", "python")
+        pythonpath = join(dest_dir, 'lib', 'python2.7', 'site-packages')
+        build_env['PYTHONPATH'] = pythonpath
+        args = [hostpython, "setup.py", "install", "--prefix", dest_dir]
+        shprint(*args, _env=build_env)
+
+recipe = CffiRecipe()

recipes/cryptography/__init__.py

@@ -0,0 +1,47 @@
+from os.path import join
+from toolchain import CythonRecipe
+from toolchain import shprint
+import os
+import sh
+
+
+class CryptographyRecipe(CythonRecipe):
+    name = "cryptography"
+    version = "1.5.2"
+    url = (
+        "https://pypi.python.org/packages/03/1a/"
+        "60984cb85cc38c4ebdfca27b32a6df6f1914959d8790f5a349608c78be61/"
+        "cryptography-{version}.tar.gz"
+    )
+    library = "libcryptography.a"
+    depends = ["host_setuptools", "cffi", "six", "idna", "pyasn1", "enum34"]
+    cythonize = False
+
+    def get_recipe_env(self, arch):
+        env = super(CryptographyRecipe, self).get_recipe_env(arch)
+        env["CC"] += " -I{}".format(
+            join(self.ctx.dist_dir, "include", arch.arch, "libffi"))
+        env["CFLAGS"] += " -I{}".format(
+            join(self.ctx.dist_dir, "include", arch.arch, "openssl", "openssl"))
+        return env
+
+    def install(self):
+        arch = list(self.filtered_archs)[0]
+        build_dir = self.get_build_dir(arch.arch)
+        os.chdir(build_dir)
+        # manually create expected directory in build directory
+        scripts_dir = join("build", "scripts-2.7")
+        if not os.path.exists(scripts_dir):
+            os.makedirs(scripts_dir)
+        hostpython = sh.Command(self.ctx.hostpython)
+        build_env = arch.get_env()
+        dest_dir = join(self.ctx.dist_dir, "root", "python")
+        pythonpath = join(dest_dir, 'lib', 'python2.7', 'site-packages')
+        build_env['PYTHONPATH'] = pythonpath
+        args = [hostpython, "setup.py", "install", "--prefix", dest_dir]
+        shprint(*args, _env=build_env)
+        args = [hostpython, "setup.py", "install"]
+        shprint(*args, _env=build_env)
+
+recipe = CryptographyRecipe()
+

recipes/enum34/__init__.py

@@ -0,0 +1,25 @@
+from os.path import join
+from toolchain import PythonRecipe
+from toolchain import shprint
+import os
+import sh
+
+
+class Enum34Recipe(PythonRecipe):
+    version = "1.1.6"
+    url = 'https://pypi.python.org/packages/source/e/enum34/enum34-{version}.tar.gz'
+    depends = ["python", "host_setuptools"]
+
+    def install(self):
+        arch = list(self.filtered_archs)[0]
+        build_dir = self.get_build_dir(arch.arch)
+        os.chdir(build_dir)
+        hostpython = sh.Command(self.ctx.hostpython)
+        build_env = arch.get_env()
+        dest_dir = join(self.ctx.dist_dir, "root", "python")
+        pythonpath = join(dest_dir, 'lib', 'python2.7', 'site-packages')
+        build_env['PYTHONPATH'] = pythonpath
+        args = [hostpython, "setup.py", "install", "--prefix", dest_dir]
+        shprint(*args, _env=build_env)
+
+recipe = Enum34Recipe()

recipes/host_cffi/__init__.py

@@ -0,0 +1,66 @@
+from os.path import join
+from toolchain import Recipe
+from toolchain import shprint
+import os
+import sh
+
+libffi_tpl = """
+prefix=%PREFIX%
+exec_prefix=${prefix}
+libdir=${exec_prefix}/build/Release
+includedir=${libdir}/build_macosx-x86_64/include
+
+Name: libffi
+Description: Library supporting Foreign Function Interfaces
+Version: %VERSION%
+Libs: -L${libdir} -lffi
+Cflags: -I${includedir}
+"""
+
+class HostCffiRecipe(Recipe):
+    name = "host_cffi"
+    version = "1.8.3"
+    archs = ["x86_64"]
+    url = (
+        "https://pypi.python.org/packages/0a/f3/"
+        "686af8873b70028fccf67b15c78fd4e4667a3da995007afc71e786d61b0a/"
+        "cffi-{version}.tar.gz"
+    )
+    depends = ["libffi", "host_setuptools", "pycparser"]
+
+    def get_recipe_env(self, arch):
+        sdk_path = sh.xcrun("--sdk", "macosx", "--show-sdk-path").strip()
+        env = super(HostCffiRecipe, self).get_recipe_env(arch)
+        env["CC"] = "clang -Qunused-arguments -fcolor-diagnostics"
+        env["LDFLAGS"] = " ".join([
+                "-undefined dynamic_lookup",
+                "-shared",
+                "-L{}".format(join(self.ctx.dist_dir, "hostlibffi", "usr", "local", "lib"))
+                ])
+        env["CFLAGS"] = " ".join([
+                "--sysroot={}".format(sdk_path),
+                "-I{}".format(join(self.ctx.dist_dir, "hostlibffi", "usr", "local", "include"))
+                ])
+        return env
+
+    def prebuild_arch(self, arch):
+        hostpython = sh.Command(self.ctx.hostpython)
+        build_dir = self.get_build_dir(arch.arch)
+        build_env = self.get_recipe_env(arch)
+        os.chdir(build_dir)
+
+        # generate a fake libffi pkg-config to let cffi use it
+        hostlibffi = Recipe.get_recipe("hostlibffi", self.ctx)
+        with open("libffi.pc", "w") as fd:
+            tpl = libffi_tpl.replace("%PREFIX%",
+                    hostlibffi.get_build_dir(arch.arch))
+            tpl = tpl.replace("%VERSION%", hostlibffi.version)
+            fd.write(tpl)
+
+        build_env["PKG_CONFIG"] = "/usr/local/bin/pkg-config"
+        build_env["PKG_CONFIG_PATH"] = build_dir 
+
+        shprint(hostpython, "setup.py", "build_ext", _env=build_env)
+        shprint(hostpython, "setup.py", "install", _env=build_env)
+
+recipe = HostCffiRecipe()

recipes/host_setuptools/__init__.py

@@ -28,7 +28,9 @@ class HostSetuptools(Recipe):
             shprint(unzip, setuptools_egg_path)
         os.remove(setuptools_egg_path)
         os.remove('setuptools.pth')
-        os.remove('easy-install.pth')
+        # XXX: setuptools egg is referenced in easy-install.pth, check removal
+        #      after unpacking setuptools if necessary
+        #os.remove('easy-install.pth')
         shutil.rmtree('EGG-INFO')
 
 recipe = HostSetuptools()

recipes/hostpython/__init__.py

@@ -24,7 +24,7 @@ class HostpythonRecipe(Recipe):
             return
         self.copy_file("_scproxy.py", "Lib/_scproxy.py")
         self.apply_patch("ssize-t-max.patch")
-        self.apply_patch("dynload.patch")
+        # self.apply_patch("dynload.patch")
         self.apply_patch("static-_sqlite3.patch")
         self.copy_file("ModulesSetup", "Modules/Setup.local")
         if "openssl.build_all" in self.ctx.state:

recipes/idna/__init__.py

@@ -0,0 +1,29 @@
+from os.path import join
+from toolchain import PythonRecipe
+from toolchain import shprint
+import os
+import sh
+
+
+class IdnaRecipe(PythonRecipe):
+    version = "2.1"
+    url = (
+        "https://pypi.python.org/packages/fb/84/"
+        "8c27516fbaa8147acd2e431086b473c453c428e24e8fb99a1d89ce381851/"
+        "idna-{version}.tar.gz"
+    )
+    depends = ["python", "host_setuptools"]
+
+    def install(self):
+        arch = list(self.filtered_archs)[0]
+        build_dir = self.get_build_dir(arch.arch)
+        os.chdir(build_dir)
+        hostpython = sh.Command(self.ctx.hostpython)
+        build_env = arch.get_env()
+        dest_dir = join(self.ctx.dist_dir, "root", "python")
+        pythonpath = join(dest_dir, 'lib', 'python2.7', 'site-packages')
+        build_env['PYTHONPATH'] = pythonpath
+        args = [hostpython, "setup.py", "install", "--prefix", dest_dir]
+        shprint(*args, _env=build_env)
+
+recipe = IdnaRecipe()

recipes/ipaddress/__init__.py

@@ -0,0 +1,29 @@
+from os.path import join
+from toolchain import PythonRecipe
+from toolchain import shprint
+import os
+import sh
+
+
+class IPAddressRecipe(PythonRecipe):
+    version = "1.0.17"
+    url = (
+        "https://pypi.python.org/packages/bb/26/"
+        "3b64955ff73f9e3155079b9ed31812afdfa5333b5c76387454d651ef593a/"
+        "ipaddress-{version}.tar.gz"
+    )
+    depends = ["python", "host_setuptools"]
+
+    def install(self):
+        arch = list(self.filtered_archs)[0]
+        build_dir = self.get_build_dir(arch.arch)
+        os.chdir(build_dir)
+        hostpython = sh.Command(self.ctx.hostpython)
+        build_env = arch.get_env()
+        dest_dir = join(self.ctx.dist_dir, "root", "python")
+        pythonpath = join(dest_dir, 'lib', 'python2.7', 'site-packages')
+        build_env['PYTHONPATH'] = pythonpath
+        args = [hostpython, "setup.py", "install", "--prefix", dest_dir]
+        shprint(*args, _env=build_env)
+
+recipe = IPAddressRecipe()

recipes/pyasn1/__init__.py

@@ -0,0 +1,29 @@
+from os.path import join
+from toolchain import PythonRecipe
+from toolchain import shprint
+import os
+import sh
+
+
+class Pyasn1Recipe(PythonRecipe):
+    version = "0.1.9"
+    url = (
+        "https://pypi.python.org/packages/f7/83/"
+        "377e3dd2e95f9020dbd0dfd3c47aaa7deebe3c68d3857a4e51917146ae8b/"
+        "pyasn1-{version}.tar.gz"
+    )
+    depends = ["ipaddress"]
+
+    def install(self):
+        arch = list(self.filtered_archs)[0]
+        build_dir = self.get_build_dir(arch.arch)
+        os.chdir(build_dir)
+        hostpython = sh.Command(self.ctx.hostpython)
+        build_env = arch.get_env()
+        dest_dir = join(self.ctx.dist_dir, "root", "python")
+        pythonpath = join(dest_dir, 'lib', 'python2.7', 'site-packages')
+        build_env['PYTHONPATH'] = pythonpath
+        args = [hostpython, "setup.py", "install", "--prefix", dest_dir]
+        shprint(*args, _env=build_env)
+
+recipe = Pyasn1Recipe()

recipes/pycparser/__init__.py

@@ -0,0 +1,35 @@
+from os.path import join
+from toolchain import PythonRecipe
+from toolchain import shprint
+import os
+import sh
+
+
+class PycparserRecipe(PythonRecipe):
+    version = "2.14"
+    url = (
+        "https://pypi.python.org/packages/6d/31/"
+        "666614af3db0acf377876d48688c5d334b6e493b96d21aa7d332169bee50/"
+        "pycparser-{version}.tar.gz"
+    )
+    depends = ["python"]
+
+    def install(self):
+        arch = list(self.filtered_archs)[0]
+        build_dir = self.get_build_dir(arch.arch)
+        os.chdir(build_dir)
+        # manually create expected directory in build directory
+        scripts_dir = join("build", "scripts-2.7")
+        if not os.path.exists(scripts_dir):
+            os.makedirs(scripts_dir)
+        hostpython = sh.Command(self.ctx.hostpython)
+        build_env = arch.get_env()
+        dest_dir = join(self.ctx.dist_dir, "root", "python")
+        pythonpath = join(dest_dir, 'lib', 'python2.7', 'site-packages')
+        build_env['PYTHONPATH'] = pythonpath
+        args = [hostpython, "setup.py", "install", "--prefix", dest_dir]
+        shprint(*args, _env=build_env)
+        args = [hostpython, "setup.py", "install"]
+        shprint(*args, _env=build_env)
+
+recipe = PycparserRecipe()

recipes/pyopenssl/__init__.py

@@ -0,0 +1,29 @@
+from os.path import join
+from toolchain import PythonRecipe
+from toolchain import shprint
+import os
+import sh
+
+
+class PyOpenSSLRecipe(PythonRecipe):
+    version = "16.1.0"
+    url = (
+        "https://pypi.python.org/packages/15/1e/"
+        "79c75db50e57350a7cefb70b110255757e9abd380a50ebdc0cfd853b7450/"
+        "pyOpenSSL-{version}.tar.gz"
+    )
+    depends = ["openssl", "cryptography"]
+
+    def install(self):
+        arch = list(self.filtered_archs)[0]
+        build_dir = self.get_build_dir(arch.arch)
+        os.chdir(build_dir)
+        hostpython = sh.Command(self.ctx.hostpython)
+        build_env = arch.get_env()
+        dest_dir = join(self.ctx.dist_dir, "root", "python")
+        pythonpath = join(dest_dir, 'lib', 'python2.7', 'site-packages')
+        build_env['PYTHONPATH'] = pythonpath
+        args = [hostpython, "setup.py", "install", "--prefix", dest_dir]
+        shprint(*args, _env=build_env)
+
+recipe = PyOpenSSLRecipe()

recipes/python/__init__.py

@@ -7,7 +7,7 @@ import os
 class PythonRecipe(Recipe):
     version = "2.7.1"
     url = "https://www.python.org/ftp/python/{version}/Python-{version}.tar.bz2"
-    depends = ["hostpython", "libffi", ]
+    depends = ["hostpython", "libffi"]
     optional_depends = ["openssl"]
     library = "libpython2.7.a"
     pbx_libraries = ["libz", "libbz2", "libsqlite3"]
@@ -33,7 +33,6 @@ class PythonRecipe(Recipe):
         self.append_file("ModulesSetup.mobile", "Modules/Setup.local")
         if "openssl.build_all" in self.ctx.state:
              self.append_file("ModulesSetup.openssl", "Modules/Setup.local")
-
         self.set_marker("patched")
 
     def build_arch(self, arch):

recipes/six/__init__.py

@@ -0,0 +1,29 @@
+from os.path import join
+from toolchain import PythonRecipe
+from toolchain import shprint
+import os
+import sh
+
+
+class SixRecipe(PythonRecipe):
+    version = "1.10.0"
+    url = (
+        "https://pypi.python.org/packages/b3/b2/"
+        "238e2590826bfdd113244a40d9d3eb26918bd798fc187e2360a8367068db/"
+        "six-{version}.tar.gz"
+    )
+    depends = ["python"]
+
+    def install(self):
+        arch = list(self.filtered_archs)[0]
+        build_dir = self.get_build_dir(arch.arch)
+        os.chdir(build_dir)
+        hostpython = sh.Command(self.ctx.hostpython)
+        build_env = arch.get_env()
+        dest_dir = join(self.ctx.dist_dir, "root", "python")
+        pythonpath = join(dest_dir, 'lib', 'python2.7', 'site-packages')
+        build_env['PYTHONPATH'] = pythonpath
+        args = [hostpython, "setup.py", "install", "--prefix", dest_dir]
+        shprint(*args, _env=build_env)
+
+recipe = SixRecipe()

recipes/twisted/__init__.py

@@ -0,0 +1,12 @@
+from toolchain import CythonRecipe
+
+
+class TwistedRecipe(CythonRecipe):
+    name = "twisted"
+    version = "16.1.1"
+    url = "https://github.com/twisted/twisted/archive/twisted-{version}.zip"
+    depends = ["pyopenssl", "zope_interface"]
+    cythonize = False
+
+
+recipe = TwistedRecipe()

recipes/txaio/__init__.py

@@ -0,0 +1,29 @@
+from os.path import join
+from toolchain import PythonRecipe
+from toolchain import shprint
+import os
+import sh
+
+
+class TxaioRecipe(PythonRecipe):
+    version = "2.5.1"
+    url = (
+        "https://pypi.python.org/packages/45/e1/"
+        "f7d88767d65dbfc20d4b4aa0dad657dbbe8ca629ead2bef24da04630a12a/"
+        "txaio-{version}.tar.gz"
+    )
+    depends = ["host_setuptools", "six"]
+
+    def install(self):
+        arch = list(self.filtered_archs)[0]
+        build_dir = self.get_build_dir(arch.arch)
+        os.chdir(build_dir)
+        hostpython = sh.Command(self.ctx.hostpython)
+        build_env = arch.get_env()
+        dest_dir = join(self.ctx.dist_dir, "root", "python")
+        pythonpath = join(dest_dir, 'lib', 'python2.7', 'site-packages')
+        build_env['PYTHONPATH'] = pythonpath
+        args = [hostpython, "setup.py", "install", "--prefix", dest_dir]
+        shprint(*args, _env=build_env)
+
+recipe = TxaioRecipe()

recipes/zope_interface/__init__.py

@@ -0,0 +1,13 @@
+from toolchain import CythonRecipe
+
+
+class ZopeInterfaceRecipe(CythonRecipe):
+    name = "zope"
+    version = "4.3.2"
+    url = 'http://pypi.python.org/packages/source/z/zope.interface/zope.interface-{version}.tar.gz'
+    depends = ["python", "host_setuptools"]
+    cythonize = False
+
+
+recipe = ZopeInterfaceRecipe()
+

toolchain.py

@@ -118,7 +118,9 @@ class JsonStore(object):
             with io.open(self.filename, 'w', encoding='utf-8') as fd:
                 fd.write(unicode(json.dumps(self.data, ensure_ascii=False)))
 
+
 class Arch(object):
+
     def __init__(self, ctx):
         super(Arch, self).__init__()
         self.ctx = ctx
@@ -135,7 +137,6 @@ class Arch(object):
                 d.format(arch=self))
             for d in self.ctx.include_dirs]
 
-
     def get_env(self):
         include_dirs = [
             "-I{}/{}".format(
@@ -196,7 +197,6 @@ class Arch(object):
         return env
 
 
-
 class ArchSimulator(Arch):
     sdk = "iphonesimulator"
     arch = "i386"
@@ -227,7 +227,7 @@ class Arch64IOS(Arch):
     triple = "aarch64-apple-darwin13"
     version_min = "-miphoneos-version-min=7.0"
     sysroot = sh.xcrun("--sdk", "iphoneos", "--show-sdk-path").strip()
-    
+
 
 class Graph(object):
     # Taken from python-for-android/depsort
@@ -375,19 +375,60 @@ class Context(object):
 
 
 class Recipe(object):
-    version = None
+    """Base recipe for compiling and installing dependency libraries and
+    packages to kivy iOS build.
+    """
+
     url = None
+    """Either folder name relative to recipe or download URL.
+    """
+
+    version = None
+    """Gets formatted with ``url`` if download URL.
+    """
+
     archs = []
+    """Architectures this recipe applies, empty list means all.
+    """
+
     depends = []
+    """Dependency recipes.
+    """
+
     optional_depends = []
+    """???
+    """
+
     library = None
+    """???
+    """
+
     libraries = []
+    """???
+    """
+
     include_dir = None
+    """Include directory for compilation"""
+
     include_per_arch = False
+    """???
+    """
+
     frameworks = []
+    """OS X frameworks.
+    """
+
     sources = []
+    """???
+    """
+
     pbx_frameworks = []
+    """???
+    """
+
     pbx_libraries = []
+    """???
+    """
 
     # API available for recipes
     def download_file(self, url, filename, cwd=None):
@@ -396,6 +437,7 @@ class Recipe(object):
         """
         if not url:
             return
+
         def report_hook(index, blksize, size):
             if size <= 0:
                 progression = '{0} bytes'.format(index * blksize)
@@ -638,7 +680,7 @@ class Recipe(object):
                 shutil.copytree(src_dir, dest_dir)
                 return
             ensure_dir(build_dir)
-            self.extract_file(self.archive_fn, build_dir) 
+            self.extract_file(self.archive_fn, build_dir)
 
     @cache_execution
     def build(self, arch):
@@ -812,7 +854,7 @@ class Recipe(object):
     @classmethod
     def get_recipe(cls, name, ctx):
         if not hasattr(cls, "recipes"):
-           cls.recipes = {}
+            cls.recipes = {}
 
         if '==' in name:
             name, version = name.split('==')
@@ -850,7 +892,8 @@ class PythonRecipe(Recipe):
         """Automate the installation of a Python package into the target
         site-packages.
 
-        It will works with the first filtered_archs, and the name of the recipe.
+        It will works with the first filtered_archs, and the name of the
+        recipe.
         """
         arch = self.filtered_archs[0]
         if name is None:
@@ -1047,7 +1090,6 @@ def update_pbxproj(filename):
         fn = join(ctx.dist_dir, "sources", name)
         project.add_folder(fn, parent=g_classes)
 
-
     if project.modified:
         project.backup()
         project.save()
@@ -1055,13 +1097,13 @@ def update_pbxproj(filename):
 
 if __name__ == "__main__":
     import argparse
-    
+
     class ToolchainCL(object):
         def __init__(self):
             parser = argparse.ArgumentParser(
                     description="Tool for managing the iOS / Python toolchain",
                     usage="""toolchain <command> [<args>]
-                    
+
 Available commands:
     build         Build a recipe (compile a library for the required target
                   architecture)
@@ -1177,7 +1219,7 @@ Xcode:
             parser.add_argument("name", help="Name of your project")
             parser.add_argument("directory", help="Directory where your project live")
             args = parser.parse_args(sys.argv[2:])
-            
+
             from cookiecutter.main import cookiecutter
             ctx = Context()
             template_dir = join(curdir, "tools", "templates")