Merge pull request #139 from zmoon/ci

Speed up CI a bit by avoiding micromamba call if not needed

.github/workflows/ci.yml

@@ -38,7 +38,18 @@ jobs:
 
       - name: Ensure xesmf>=0.7 if not on Python 3.6
         if: matrix.python-version != '3.6'
-        run: micromamba install 'xesmf>=0.7'
+        run: |
+          update_needed=$(python -c "
+          import sys
+          from packaging.version import Version
+          import xesmf as xe
+          v = Version(getattr(xe, '__version__', '0.0.0'))
+          print(v, file=sys.stderr)
+          print('n' if v >= Version('0.7') else 'y')
+          ")
+          if [[ $update_needed == 'y' ]]; then
+            micromamba install 'xesmf>=0.7'
+          fi
 
       - name: Install package
         run: python -m pip install -e . --no-deps