toolchain: have a better installation method

Instead of installing on a temporary directory, and copying only what
we want, this install directly in the dist,
and the recipe can clean itself in
reduce_python_package().

This prevent the fix for kivy recipes using bdist_egg and easy_install.

recipes/kivy/__init__.py

@@ -3,6 +3,7 @@ from os.path import join
 from os import chdir, listdir, getcwd
 import sh
 import logging
+import shutil
 
 logger = logging.getLogger(__name__)
 
@@ -43,55 +44,10 @@ class KivyRecipe(CythonRecipe):
         with open(pyconfig, "w") as fd:
             fd.writelines(lines)
 
-    def install_python_package(self, name=None, env=None, is_dir=True):
-        """
-        Automate the installation of a Python package into the target
-        site-packages.
-        """
-        arch = self.filtered_archs[0]
-        if name is None:
-            name = self.name
-        if env is None:
-            env = self.get_recipe_env(arch)
-        print("Install {} into the site-packages".format(name))
-        build_dir = self.get_build_dir(arch.arch)
-        chdir(build_dir)
-
-        hostpython = sh.Command(self.ctx.hostpython)
-        env["PYTHONPATH"] = self.ctx.site_packages_dir
-        shprint(
-            hostpython,
-            "setup.py",
-            "bdist_egg",
-            "--exclude-source-files",
-            "--plat-name=",
-            # "--plat-name={}".format(arch.arch),
-            _env=env,
-        )
-        for file in listdir("./dist"):
-            if file.endswith(".egg"):
-                egg_name = file
-        shprint(
-            hostpython,
-            "setup.py",
-            "easy_install",
-            "--no-deps",
-            "--install-dir",
-            self.ctx.site_packages_dir,
-            join("dist", egg_name),
-            _env=env,
-        )
-
-        # clean
-        oldpwd = getcwd()
-        try:
-            logger.info("Remove files unlikely to be used")
-            chdir(join(self.ctx.site_packages_dir, egg_name))
-            sh.rm("-rf", "share")
-            sh.rm("-rf", "kivy/tools")
-            sh.rm("-rf", "kivy/tests")
-        finally:
-            chdir(oldpwd)
+    def reduce_python_package(self):
+        dest_dir = join(self.ctx.site_packages_dir, "kivy")
+        shutil.rmtree(join(dest_dir, "tools"))
+        shutil.rmtree(join(dest_dir, "tests"))
 
 
 recipe = KivyRecipe()

toolchain.py

@@ -1043,21 +1043,16 @@ class PythonRecipe(Recipe):
         build_dir = self.get_build_dir(arch.arch)
         chdir(build_dir)
         hostpython = sh.Command(self.ctx.hostpython)
-        iosbuild = join(build_dir, "iosbuild")
-        shprint(hostpython, "setup.py", "install", "-O2",
-                "--prefix", iosbuild,
-                _env=env)
-        dest_dir = join(self.ctx.site_packages_dir, name)
-        if is_dir:
-            if exists(dest_dir):
-                shutil.rmtree(dest_dir)
-            func = shutil.copytree
-        else:
-            func = shutil.copy
-        func(
-            join(iosbuild, "lib",
-                 self.ctx.python_ver_dir, "site-packages", name),
-            dest_dir)
+
+        shprint(
+            hostpython,
+            "setup.py",
+            "install",
+            "-O2",
+            "--root", self.ctx.python_prefix,
+            "--prefix", "",
+            _env=env,
+        )
 
     def reduce_python_package(self):
         """Feel free to remove things you don't want in the final