Made handling OSError in 'mkpath()' more standard.

make 'mkdir()' return list of directories created.

for the 'bdist_dumb' command.  Adapted, with tweakage, from the 'sdist'
command.

in preparation for the 'bdist_dumb' command; these methods remain as
trivial wrappers around the versions in distutils.util.

'has_ext_modules()', 'has_c_libraries()', 'has_modules()', and 'is_pure()'.

  is responsible for installing all Python modules (pure and extensions).
Added 'get_outputs()' in preparation for the 'bdist' command, and
  '_mutate_outputs()' to support 'get_outputs()'.

  in a class attribute 'sub_commands', rather than hard-coded in 'run()'.
  This should make it easier to subclass 'install', and also makes it
  easier to keep 'run()' and the new 'get_outputs()' consistent.
Added 'get_outputs()' in preparation for the 'bdist' command.

methods of Distribution instead of grovelling directly in self.distribution.

Changed signature of 'build_extensions()': no longer takes the extension
  list, but uses 'self.extensions' (just like 'get_outputs()' has to)
Moved call to 'check_extensions_list()' from 'run()' to 'build_extensions()',
  again for consistency with 'get_outputs()'.

A host of improvements in preparation for the 'bdist' command:
  - added 'get_outputs()' method (all the other improvements were to support
    this addition)
  - made 'find_package_modules()' and 'find_modules()' return similar
    values (list of (package, module, module_filename) tuples)
  - factored 'find_all_modules()' out of 'get_source_files()' (needed
    by 'get_outputs()')
  - factored 'get_module_outfile()' out of 'build_module()' (also needed
    by 'get_outputs()')
  - various little tweaks, improvements, comment/doc updates

handle OSError and DistutilsExecError now.

rather than None.

Fixed 'build_extensions()' to pay attention to the 'rpath' element of the
  'build_info' dictionary.

  we don't know what to do with it when we see it.
Call '_fix_object_args()' and/or '_fix_lib_args()' as appropriate, rather
  than just '_fix_link_args()'.

  use it when linking.
Call '_fix_object_args()' and/or '_fix_lib_args()' as appropriate, rather
  than just '_fix_link_args()'.

Split '_fix_link_args()' up into '_fix_object_args()' (for use of
  'create_static_lib() and link methods) and '_fix_lib_args()' (for the
  link methods only).

returns a value.

Deleted some crufty code.

completely (was already commented-out).

Python modules, pure and extensions.

Python and extensions, into the same directory.

longer needed, and can't possibly work anyways.

these must come from the 'build' command.  This means we no longer need
the misconceived 'set_peer_option()' method in Command and, more importantly,
sweeps away a bunch of potential future complexity to handle this tricky
case.

Tightened up some logic in 'native_path()'.
Added 'subst_vars()' and '_check_environ()'.

Fix 'Command.set_undefined_option()' to call 'ensure_ready()' rather
  than 'finalize_options()' (which is only supposed to be called once,
  which is the whole point of 'ensure_ready()').
Added comment to 'set_peer_option()' to remind myself that this method
  cannot work and is fundamentally wrong-headed.

this command for a while; this implements roughly the plan cooked up by
Guido, Fred, and me.  Seems to strike a nice balance between usability in
the common cases (just set one option), expandability for more types of
files to install in future, and customizability of installation
directories.

This revision isn't completely working: standard and alternate
installations work fine, but there are still some kinks to work out of
customized installations.

irrelevant because this file is about to go away, but oh well.

have been checked in: was passing the PLAT environment variable as the
'plat' argument to 'new_compiler()'.

Added 'clean' to list of commands.

that broke parsing command-line options.  Instead call it in
'Command.find_peer()', which is why I added it to 'find_command_obj()'
in the first place.

  * improve help strings
  * warn if user supplies non-existing directories
  * don't try to 'remove_tree()' non-existing directories
  * try to remove the build_base after cleanup (but don't do or say
    anything if it fails -- this is just in case we made it empty)

use 'util.remove_tree()' instead of 'nuke_release_tree()'.

the Distutils 'clean' command.

option in the 'build_ext' command):
  * in ccompiler.py: 'gen_lib_options()' now takes 'runtime_library_dirs'
    parameter
  * in unixccompiler.py and msvccompiler.py: now pass
    'self.runtime_library_dirs' to 'gen_lib_options()', and define
    'runtime_library_dir_option()' (although in msvccompiler.py it
    blows up with a DistutilsPlatformError right now!)

'link_static_lib()'.