setup: on windows only try to build python stuff

Differential Revision: https://phabricator.intern.facebook.com/D4727605

setup.py

@@ -5,6 +5,7 @@ from glob import glob
 
 import os, sys
 
+iswindows = os.name == 'nt'
 # --component allows the caller to specify what components they want. We can't
 # use argparse like normal, because setup() at the bottom has it's own argument
 # logic.
@@ -115,6 +116,9 @@ def build_libraries(self, libraries):
 distutils.command.build_clib.build_clib.build_libraries = build_libraries
 
 # Static c libaries
+if iswindows:
+    libraries = []
+else:
     libraries = [
         ("datapack", {
             "sources" : ["cdatapack/cdatapack.c"],
@@ -141,12 +145,16 @@ availablepymodules = dict([(x[9:], x) for x in hgext3rd])
 availablepymodules['statprof'] = 'statprof'
 
 availablepackages = [
-    'fastannotate',
-    'fastmanifest',
     'infinitepush',
     'phabricator',
     'sqldirstate',
     'remotefilelog',
+]
+
+if iswindows:
+    availablepackages += [
+        'fastannotate',
+        'fastmanifest',
         'treemanifest',
         'linelog',
     ]
@@ -158,7 +166,7 @@ def distutils_dir_name(dname):
                     platform=distutils.util.get_platform(),
                     version=sys.version[:3])
 
-if os.name == 'nt':
+if iswindows:
     # The modules that successfully compile on Windows
     availableextmodules = {}
 else:
@@ -270,7 +278,7 @@ while processdep:
                     components.append(dep)
                     processdep = True
 
-if os.name == 'nt':
+if iswindows:
     # The modules that successfully compile on Windows
     cythonmodules = []
 else: