Fixed some problems with fresh checkouts of projects that don't include

``.egg-info/PKG-INFO`` under revision control and put the project's source
code directly in the project directory.  If such a package had any
requirements that get processed before the ``egg_info`` command can be run,
the setup scripts would fail with a "Missing 'Version:' header and/or
PKG-INFO file" error, because the egg runtime interpreted the unbuilt
metadata in a directory on ``sys.path`` (i.e. the current directory) as
being a corrupted egg.  Setuptools now monkeypatches the distribution
metadata cache to pretend that the egg has valid version information, until
it has a chance to make it actually be so (via the ``egg_info`` command).

--HG--
branch : setuptools
extra : convert_revision : svn%3A6015fed2-1504-0410-9fe1-9d1591cc4771/sandbox/trunk/setuptools%4041401

setuptools.txt

@@ -1966,6 +1966,17 @@ Release Notes/Change History
    number from ``PKG-INFO`` in case it is being run on a source distribution of
    a snapshot taken from a Subversion-based project.
 
+ * Fixed some problems with fresh checkouts of projects that don't include
+   ``.egg-info/PKG-INFO`` under revision control and put the project's source
+   code directly in the project directory.  If such a package had any
+   requirements that get processed before the ``egg_info`` command can be run,
+   the setup scripts would fail with a "Missing 'Version:' header and/or
+   PKG-INFO file" error, because the egg runtime interpreted the unbuilt
+   metadata in a directory on ``sys.path`` (i.e. the current directory) as
+   being a corrupted egg.  Setuptools now monkeypatches the distribution
+   metadata cache to pretend that the egg has valid version information, until
+   it has a chance to make it actually be so (via the ``egg_info`` command).
+
 0.6a5
  * Fixed missing gui/cli .exe files in distribution.  Fixed bugs in tests.
  

setuptools/command/egg_info.py

@@ -7,7 +7,7 @@ import os, re
 from setuptools import Command
 from distutils.errors import *
 from distutils import log
-from pkg_resources import parse_requirements, safe_name, \
+from pkg_resources import parse_requirements, safe_name, parse_version, \
     safe_version, yield_lines, EntryPoint, iter_entry_points
 
 class egg_info(Command):
@@ -65,16 +65,16 @@ class egg_info(Command):
         #
         self.distribution.metadata.version = self.egg_version
 
-
-
-
-
-
-
-
-
-
-
+        # If we bootstrapped around the lack of a PKG-INFO, as might be the
+        # case in a fresh checkout, make sure that any special tags get added
+        # to the version info
+        #
+        pd = self.distribution._patched_dist
+        if pd is not None and pd.key==self.egg_name.lower():
+            pd._version = self.egg_version
+            pd._parsed_version = parse_version(self.egg_version)
+            self.distribution._patched_dist = None
+            
 
 
 

setuptools/dist.py

@@ -188,20 +188,20 @@ class Distribution(_Distribution):
     distribution for the included and excluded features.
     """
 
-
-
-
-
-
-
-
-
-
-
-
-
-
-
+    _patched_dist = None
+
+    def patch_missing_pkg_info(self, attrs):
+        # Fake up a replacement for the data that would normally come from
+        # PKG-INFO, but which might not yet be built if this is a fresh
+        # checkout.
+        #
+        if not attrs or 'name' not in attrs or 'version' not in attrs:
+            return
+        key = pkg_resources.safe_name(str(attrs['name'])).lower()
+        dist = pkg_resources.working_set.by_key.get(key)
+        if dist is not None and not dist.has_metadata('PKG-INFO'):
+            dist._version = pkg_resources.safe_version(str(attrs['version']))
+            self._patched_dist = dist
 
     def __init__ (self, attrs=None):
         have_package_data = hasattr(self, "package_data")
@@ -210,7 +210,7 @@ class Distribution(_Distribution):
         self.requires = []  # XXX
         self.features = {}
         self.dist_files = []
-
+        self.patch_missing_pkg_info(attrs)
         if attrs and 'setup_requires' in attrs:
             # Make sure we have any eggs needed to interpret 'attrs'
             self.fetch_build_eggs(attrs.pop('setup_requires'))