Successfully removed sre_parse.py and family.

- Remove 're' import in the stdlib 'string' module.
- Remove Oil's dependency on the platform module, because it uses 're'
  to parse Python's own sys.version.  We can just use sys.version
  instead.
- Fix the app bundle by including pickles.  Remove .asdl schemas.

Still need to remove _sre.c.

Python-2.7.13/Lib/platform.py

@@ -1457,9 +1457,7 @@ def python_implementation():
          'PyPy' (Python implementation of Python).

    """
    # PATCH to identify OVM
    return 'OVM'
    #return _sys_version()[0]
    return _sys_version()[0]

def python_version():

Python-2.7.13/Lib/string.py

@@ -78,9 +78,9 @@ def maketrans(fromstr, tostr):
    return ''.join(L)



####################################################################
import re as _re
# OVM_MAIN patch: Removed so we don't depend on 're' module.  We're not using
# string.Template.
#import re as _re

class _multimap:
    """Helper class for combining multiple mappings.
@@ -123,7 +123,8 @@ def __init__(cls, name, bases, dct):

class Template:
    """A string class for supporting $-substitutions."""
    __metaclass__ = _TemplateMetaclass
    # OVM_MAIN patch: avoid running constructor, which uses _re
    #__metaclass__ = _TemplateMetaclass

    delimiter = '$'
    idpattern = r'[_a-z][_a-z0-9]*'

build/oil-manifest.txt

@@ -1,5 +1,5 @@
osh/osh.asdl osh/osh.asdl
osh/types.asdl osh/types.asdl
core/runtime.asdl core/runtime.asdl
oil-version.txt oil-version.txt 
doc/osh-quick-ref-toc.txt doc/osh-quick-ref-toc.txt
_devbuild/types_asdl.pickle _devbuild/types_asdl.pickle
_devbuild/osh_asdl.pickle _devbuild/osh_asdl.pickle
_devbuild/runtime_asdl.pickle _devbuild/runtime_asdl.pickle

core/util.py

@@ -15,7 +15,6 @@

import cStringIO
import os
import platform
import pwd  # TODO: Move this dependency to Oil?
import sys

@@ -269,15 +268,30 @@ def ShowAppVersion(app_name):
  finally:
    f.close()

  # node is like 'hostname'
  # release is the kernel version
  system, unused_node, unused_release, platform_version, machine = os.uname()

  # The platform.py module has a big regex that parses sys.version, but we
  # don't want to depend on regular expressions.  So we will do our own parsing
  # here.
  py_version, py_compiler = sys.version.splitlines()
  assert py_compiler.startswith('['), py_compiler
  assert py_compiler.endswith(']'), py_compiler
  py_compiler = py_compiler[1:-1]

  # This environment variable set in C code.
  py_impl = 'OVM' if os.getenv('_OVM_IS_BUNDLE') else 'CPython'

  # What C functions do these come from?
  print('%s version %s' % (app_name, version))
  print('Release Date: %s' % release_date)
  print('Arch: %s' % platform.machine())
  print('OS: %s' % platform.system())
  print('Platform: %s' % platform.version())
  print('Compiler: %s' % platform.python_compiler())
  print('Interpreter: %s' % platform.python_implementation())
  print('Interpreter version: %s' % platform.python_version())
  print('Arch: %s' % machine)
  print('OS: %s' % system)
  print('Platform: %s' % platform_version)
  print('Compiler: %s' % py_compiler)
  print('Interpreter: %s' % py_impl)
  print('Interpreter version: %s' % py_version)
  print('Bytecode: %s' % pyc_version)