CI: Optional dependencies

Author: effigies

.github/workflows/test.yml

@@ -35,7 +35,8 @@ jobs:
             architecture: x86
     env:
       SETUP_REQUIRES: 'pip setuptools>=30.3.0 wheel'
-      DEPENDS: 'numpy scipy matplotlib h5py pillow pydicom indexed_gzip'
+      DEPENDS: 'numpy scipy matplotlib pillow pydicom'
+      OPTIONAL_DEPENDS: 'h5py indexed_gzip'
       INSTALL_TYPE: ${{ matrix.install }}
       CHECK_TYPE: 'test'
       EXTRA_PIP_FLAGS: ''

tools/ci/install_dependencies.sh

@@ -14,6 +14,7 @@ set -x
 
 if [ -n "$DEPENDS" ]; then
     pip install $EXTRA_PIP_FLAGS $DEPENDS
+    pip install $EXTRA_PIP_FLAGS $OPTIONAL_DEPENDS || true
 fi
 
 set +eux