found way to determine vcc

Author: Pebaz

README.md

@@ -488,15 +488,6 @@ files generated by Nim are platform specific, so they would only be of use to
 users on the same exact platform and architecture. This is why the official way
 of distributing Nimporter libraries is by creating binary wheels.
 
-## Notes
-
-Nimporter on Windows only works with the MSVC compiler via Nim's `--cc:vcc` flag
-because it is not possible to determine what C code Nim will generate based on
-several different layers of config files. In addition, if multiple compilers are
-installed on the target machine, this makes things even more difficult. To force
-Nimporter to use GCC on Windows, you can use `switches.py` on a per-project
-basis. However, pull requests are welcome if they can address this limitation.
-
 ## State Of The Project
 
 I have implemented all of the features that I wanted to add at this time. I made

nimporter.py

@@ -126,7 +126,7 @@ class NimCompiler:
         '-d:strip',
         '-d:lto',
         '-d:ssl'
-    ] + (['--cc:vcc'] if sys.platform == 'win32' else [])
+    ] + (['--cc:vcc'] if 'MSC' in sys.version else [])
     EXT_DIR = 'nim-extensions'
 
     @classmethod

tests/test_installation.py

@@ -93,9 +93,12 @@ def test_create_bdist():
                             f'{actual}'
                         )
         finally:
-            shutil.rmtree(str(dist.absolute()))
-            shutil.rmtree(str(build.absolute()))
-            shutil.rmtree(str(egg.absolute()))
+            if dist.absolute().exists():
+                shutil.rmtree(str(dist.absolute()))
+            if build.absolute().exists():
+                shutil.rmtree(str(build.absolute()))
+            if egg.absolute().exists():
+                shutil.rmtree(str(egg.absolute()))
 
 
 @pytest.mark.slow_integration_test
@@ -114,8 +117,10 @@ def test_install_sdist():
             assert target.exists()
             subprocess.Popen(f'{PIP} install {target}'.split()).wait()
         finally:
-            shutil.rmtree(str(dist.absolute()))
-            shutil.rmtree(str(egg.absolute()))
+            if dist.absolute().exists():
+                shutil.rmtree(str(dist.absolute()))
+            if egg.absolute().exists():
+                shutil.rmtree(str(egg.absolute()))
 
     # Make sure that `tests/proj1` is not imported as a SimpleNamespace and that
     # the installed library in `site-packages` is used.