Run pylint on clcachesrv.py during CI builds

I needed to whitelist some Python packages using C code because pylint
refuses to load them (in order to inspect their exposed API) for
security reasons, so it ends up reporting that all used API is
undefined.

I couldn't tell why it wouldn't recognize pywintypes.OVERLAPPED()
though, and adding pywintypes to the whitelist wouldn't help - so I
resorted to just explicitly disabling that warning.

.pylintrc

@@ -28,7 +28,7 @@ unsafe-load-any-extension=no
 # A comma-separated list of package or module names from where C extensions may
 # be loaded. Extensions are loading into the active Python interpreter and may
 # run arbitrary code
-extension-pkg-whitelist=
+extension-pkg-whitelist=win32api,win32event,win32file,win32pipe
 
 # Allow optimization of some AST trees. This will activate a peephole AST
 # optimizer, which will apply various small optimizations. For instance, it can

appveyor.yml

@@ -42,10 +42,14 @@ install:
   - pip install codecov
   - coverage --version
 
+  # Install dependency needed for clcachesrv
+  - pip install pypiwin32
+
 build_script:
   - python clcache.py --help
   - python clcache.py -s
   - pylint --rcfile=.pylintrc clcache.py
+  - pylint --rcfile=.pylintrc clcachesrv.py
   - pylint --rcfile=.pylintrc unittests.py
   - pylint --rcfile=.pylintrc integrationtests.py
   - pylint --rcfile=.pylintrc performancetests.py

clcachesrv.py

@@ -59,7 +59,7 @@ def __init__(self, path):
         self.readBuffer = win32file.AllocateReadBuffer(8192)
         self.cachedHashes = {}
 
-        self.overlapped = pywintypes.OVERLAPPED()
+        self.overlapped = pywintypes.OVERLAPPED() # pylint: disable=no-member
         self.overlapped.hEvent = self.eventHandle
         self.listen()
 
@@ -109,7 +109,7 @@ def __init__(self, path):
             print("CreateNamedPipe failed for {name}: {error}".format(name=path, error=win32api.GetLastError()))
             sys.exit(1)
 
-        self._overlapped = pywintypes.OVERLAPPED()
+        self._overlapped = pywintypes.OVERLAPPED() # pylint: disable=no-member
         self._overlapped.hEvent = win32event.CreateEvent(None, True, 0, None)
         self.event = self._overlapped.hEvent