fix sdist

MANIFEST.in

@@ -0,0 +1,39 @@
+pyproject.toml
+setup.cfg
+setup.py
+./idi/__init__.py
+./idi/reconstruction/__init__.py
+./idi/reconstruction/autocorrelate3.pyx
+./idi/reconstruction/mkl_dfti.pxd
+./idi/reconstruction/common.py
+./idi/reconstruction/cpucor.py
+./idi/reconstruction/cpucorrad.py
+./idi/reconstruction/cpusimple.py
+./idi/reconstruction/cucor.py
+./idi/reconstruction/cucorrad.py
+./idi/reconstruction/cusimple.py
+./idi/reconstruction/ft.py
+./idi/reconstruction/hitcor.py
+./idi/reconstruction/hitcorrad.py
+./idi/reconstruction/singleshotnorm.py
+./idi/simulation/__init__.py
+./idi/simulation/common.py
+./idi/simulation/cpu.py
+./idi/simulation/cuda.py
+./idi/simulation/cutime.py
+./idi/simulation/sim.cu
+./idi/simulation/simobj.py
+./idi/simulation/simple.py
+./idi/simulation/simtime.cu
+./idi/simulation/time.py
+./idi/util/__init__.py
+./idi/util/accum.py
+./idi/util/datasetreader.py
+./idi/util/filters.py
+./idi/util/funchelper.py
+./idi/util/h5util.py
+./idi/util/poissondisk.py
+./idi/util/random.py
+./idi/util/submitmagic.py
+scripts/idi_sim.py
+scripts/idi_simrecon.py

pyproject.toml

@@ -4,3 +4,5 @@ requires-python = ">=3.6"
 [build-system]
 build-backend = "setuptools.build_meta"
 requires = ["setuptools", "oldest-supported-numpy", "Cython", "mkl==2019; sys_platform != 'win32'", "mkl-include==2019; sys_platform != 'win32'", "mkl-devel; sys_platform == 'win32'"]
+
+[tool]

setup.py

@@ -82,7 +82,10 @@ def configuration():
 
         sources = [join(srcdir, "reconstruction", "autocorrelate3.pyx")]
         have_cython = True
-    except ImportError as e:
+        if not exists(sources[0]):
+            print('pyx missing')
+            raise FileNotFoundError
+    except (ImportError, FileNotFoundError) as e:
         have_cython = False
         sources = [join(srcdir, "reconstruction", "autocorrelate.c")]
         if not exists(sources[0]):