Added "doing" info when getting distributions.

Treat DistutilsErrors as user errors.

src/zc/buildout/buildout.py

@@ -16,6 +16,7 @@
 $Id$
 """
 
+import distutils.errors
 import logging
 import md5
 import os
@@ -1181,7 +1182,10 @@ def main(args=None):
                 sys.stderr.write('\nStarting pdb:\n')
                 pdb.post_mortem(exc_info[2])
             else:
-                if isinstance(v, zc.buildout.UserError):
+                if isinstance(v, (zc.buildout.UserError,
+                                  distutils.errors.DistutilsError,
+                                  )
+                              ):
                     _error(str(v))
                 else:
                     _internal_error(v)

src/zc/buildout/easy_install.py

@@ -249,6 +249,8 @@ class Installer:
 
     def _get_dist(self, requirement, ws, always_unzip):
 
+        __doing__ = 'Getting distribution for %s', requirement
+
         # Maybe an existing dist is already the best dist that satisfies the
         # requirement
         dist = self._satisfied(requirement)

src/zc/buildout/tests.py

@@ -1324,6 +1324,23 @@ def internal_errors():
     global name 'os' is not defined
     """
 
+def download_errors():
+    """
+    >>> write(sample_buildout, 'buildout.cfg',
+    ... '''
+    ... [buildout]
+    ... parts = 
+    ... find-links = http://127.0.0.1/no-shuch-thing
+    ... ''')
+
+    >>> print system(buildout), # doctest: +ELLIPSIS
+    While:
+      Installing
+      Checking for upgrades
+      Getting distribution for setuptools
+    Error: Download error...
+    """
+    
 
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