cleanup: make sure we always access members of imported modules

This will make sure we get import errors, even if demandimport is enabled.

This will also mute some pyflakes 'imported but unused' warnings.

contrib/win32/hgwebdir_wsgi.py

@@ -52,6 +52,7 b' import sys'
 # Enable tracing. Run 'python -m win32traceutil' to debug
 if getattr(sys, 'isapidllhandle', None) is not None:
     import win32traceutil
+    win32traceutil.SetupForPrint # silence unused import warning
 
 # To serve pages in local charset instead of UTF-8, remove the two lines below
 import os
@@ -90,6 +91,6 b' def __ExtensionFactory__():'
     return isapi_wsgi.ISAPISimpleHandler(handler)
 
 if __name__=='__main__':
-    from isapi.install import *
+    from isapi.install import ISAPIParameters, HandleCommandLine
     params = ISAPIParameters()
     HandleCommandLine(params)

setup.py

@@ -33,12 +33,14 b' try:'
 except ImportError:
     try:
         import sha
+        sha.sha # silence unused import warning
     except ImportError:
         raise SystemExit(
             "Couldn't import standard hashlib (incomplete Python install).")
 
 try:
     import zlib
+    zlib.compressobj # silence unused import warning
 except ImportError:
     raise SystemExit(
         "Couldn't import standard zlib (incomplete Python install).")
@@ -56,6 +58,7 b' if isironpython:'
 else:
     try:
         import bz2
+        bz2.BZ2Compressor # silence unused import warning
     except ImportError:
         raise SystemExit(
             "Couldn't import standard bz2 (incomplete Python install).")
@@ -129,6 +132,7 b' def hasfunction(cc, funcname):'
 # py2exe needs to be installed to work
 try:
     import py2exe
+    py2exe.Distribution # silence unused import warning
     py2exeloaded = True
     # import py2exe's patched Distribution class
     from distutils.core import Distribution

tests/hghave.py

@@ -148,6 +148,7 b' def has_cacheable_fs():'
 def has_lsprof():
     try:
         import _lsprof
+        _lsprof.Profiler # silence unused import warning
         return True
     except ImportError:
         return False
@@ -164,6 +165,7 b' def has_git():'
 def has_docutils():
     try:
         from docutils.core import publish_cmdline
+        publish_cmdline # silence unused import
         return True
     except ImportError:
         return False
@@ -270,6 +272,7 b' def has_pyflakes():'
 def has_pygments():
     try:
         import pygments
+        pygments.highlight # silence unused import warning
         return True
     except ImportError:
         return False
@@ -288,6 +291,7 b' def has_outer_repo():'
 def has_ssl():
     try:
         import ssl
+        ssl.wrap_socket # silence unused import warning
         import OpenSSL
         OpenSSL.SSL.Context
         return True

tests/test-check-pyflakes.t

@@ -7,16 +7,6 b' run pyflakes on all tracked files ending'
 
   $ hg locate 'set:**.py or grep("^!#.*python")' 2>/dev/null \
   > | xargs pyflakes 2>/dev/null | "$TESTDIR/filterpyflakes.py"
-  contrib/win32/hgwebdir_wsgi.py:*: 'win32traceutil' imported but unused (glob)
-  setup.py:*: 'sha' imported but unused (glob)
-  setup.py:*: 'zlib' imported but unused (glob)
-  setup.py:*: 'bz2' imported but unused (glob)
-  setup.py:*: 'py2exe' imported but unused (glob)
-  tests/hghave.py:*: '_lsprof' imported but unused (glob)
-  tests/hghave.py:*: 'publish_cmdline' imported but unused (glob)
-  tests/hghave.py:*: 'pygments' imported but unused (glob)
-  tests/hghave.py:*: 'ssl' imported but unused (glob)
-  contrib/win32/hgwebdir_wsgi.py:93: 'from isapi.install import *' used; unable to detect undefined names (glob)
   tests/filterpyflakes.py:58: undefined name 'undefinedname'