Uses new cd context manager more

Also adds logging as we change directories.

recipes/itsdangerous/__init__.py

@@ -1,8 +1,7 @@
 # pure-python package, this can be removed when we'll support any python package
-from toolchain import PythonRecipe, shprint
+from toolchain import PythonRecipe, shprint, cd
 from os.path import join
 import sh
-import os
 
 
 class ItsDangerousRecipe(PythonRecipe):
@@ -13,12 +12,12 @@ class ItsDangerousRecipe(PythonRecipe):
     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")
         build_env['PYTHONPATH'] = join(dest_dir, 'lib', 'python2.7', 'site-packages')
         cmd = sh.Command("sed")
+        with cd(build_dir):
             shprint(cmd, "-i", "", "s/setuptools/distutils.core/g", "./setup.py", _env=build_env)
             shprint(hostpython, "setup.py", "install", "--prefix", dest_dir, _env=build_env)
 

recipes/pycrypto/__init__.py

@@ -1,9 +1,8 @@
 '''Recipe for pycrypto on ios
 '''
-from toolchain import CythonRecipe, shprint
+from toolchain import CythonRecipe, shprint, cd
 from os.path import join
 import sh
-import os
 
 
 class PycryptoRecipe(CythonRecipe):
@@ -31,11 +30,11 @@ class PycryptoRecipe(CythonRecipe):
     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")
         build_env['PYTHONPATH'] = join(dest_dir, 'lib', 'python2.7', 'site-packages')
+        with cd(build_dir):
             shprint(hostpython, "setup.py", "install", "--prefix", dest_dir, _env=build_env)
 
 

toolchain.py

@@ -62,10 +62,12 @@ IS_PY2 = sys.version_info[0] == 2
 @contextmanager
 def cd(newdir):
     prevdir = getcwd()
+    logger.info("cd {}".format(newdir))
     chdir(expanduser(newdir))
     try:
         yield
     finally:
+        logger.info("cd {}".format(prevdir))
         chdir(prevdir)