Add bootstrap installation support that "hitches a ride" on other packages

being installed via the normal distutils "setup.py install".  Also, don't
repeatedly download the setuptools egg if it's already in the target
location.

--HG--
branch : setuptools
extra : convert_revision : svn%3A6015fed2-1504-0410-9fe1-9d1591cc4771/sandbox/trunk/setuptools%4041069

1 files changed, 12 insertions, 12 deletions

diff --git a/setuptools/dist.py b/setuptools/dist.py
index a39b4a13..f46a02f8 100644
--- a/setuptools/dist.py
+++ b/setuptools/dist.py
@@ -8,6 +8,7 @@ from setuptools.command.install import install
 from setuptools.command.install_lib import install_lib
 from distutils.errors import DistutilsOptionError, DistutilsPlatformError
 from distutils.errors import DistutilsSetupError
+import setuptools
 
 sequence = tuple, list
 
@@ -38,7 +39,6 @@ sequence = tuple, list
 
 
 
-
 class Distribution(_Distribution):
     """Distribution with support for features, tests, and package data
 
@@ -348,18 +348,18 @@ class Distribution(_Distribution):
         return not not self.requires
 
 
+    def run_commands(self):
+        if setuptools.bootstrap_install_from and 'install' in self.commands:
+            # Bootstrap self-installation of setuptools
+            from easy_install import easy_install
+            cmd = easy_install(
+                self, args=[setuptools.bootstrap_install_from], zip_ok=1
+            )
+            cmd.ensure_finalized()
+            cmd.run()
+            setuptools.bootstrap_install_from = None
 
-
-
-
-
-
-
-
-
-
-
-
+        _Distribution.run_commands(self)