DEP: Pin to shapely versions less than 2

Shapely v2+ changes the C API access, so pin to earlier versions
until this is fixed.

.circleci/config.yml

@@ -45,7 +45,7 @@ deps-run: &deps-install
         pyshp \
         scipy \
         setuptools_scm \
-        shapely \
+        'shapely<2' \
         $EXTRA_PACKAGES \
         --file docs/doc-requirements.txt
     conda list -n test-environment

.github/workflows/ci-testing.yml

@@ -35,7 +35,7 @@ jobs:
       - name: Latest packages
         if: steps.minimum-packages.conclusion == 'skipped'
         run: |
-          echo "PACKAGES=cython fiona matplotlib-base numpy pyproj pykdtree scipy shapely" >> $GITHUB_ENV
+          echo "PACKAGES=cython fiona matplotlib-base numpy pyproj pykdtree scipy shapely<2" >> $GITHUB_ENV
 
       - name: Coverage packages
         id: coverage
@@ -49,7 +49,7 @@ jobs:
       - name: Install dependencies
         run: |
           PACKAGES="$PACKAGES owslib pep8 pillow pyshp pytest pytest-mpl!=0.16.0"
-          PACKAGES="$PACKAGES pytest-xdist setuptools_scm shapely"
+          PACKAGES="$PACKAGES pytest-xdist setuptools_scm shapely<2"
           conda install $PACKAGES
           conda info -a
           conda list

.github/workflows/release.yml

@@ -26,7 +26,7 @@ jobs:
         run: |
           PACKAGES="cython fiona matplotlib-base numpy pyproj pykdtree scipy"
           PACKAGES="$PACKAGES owslib pep8 pillow pyshp pytest"
-          PACKAGES="$PACKAGES pytest-xdist setuptools_scm shapely"
+          PACKAGES="$PACKAGES pytest-xdist setuptools_scm shapely<2"
           conda install $PACKAGES
 
       - name: Create sdist

INSTALL

@@ -85,7 +85,7 @@ For macOS, the required dependencies can be installed in the following way::
     pip3 install --upgrade pyshp
     # shapely needs to be built from source to link to geos. If it is already
     # installed, uninstall it by: pip3 uninstall shapely
-    pip3 install shapely --no-binary shapely
+    pip3 install "shapely<2" --no-binary shapely
 
 Still on macOS, make sure you have installed pkg-config and set the
 `PKG_CONFIG_PATH` environment variable as follows::
@@ -117,7 +117,7 @@ Further information about the required dependencies can be found here:
     GEOS is an API of spatial predicates and functions for processing geometry
     written in C++.
 
-**Shapely** 1.6.4 or later (https://github.com/Toblerity/Shapely)
+**Shapely** between 1.6.4 and 1.8.4 (https://github.com/Toblerity/Shapely)
     Python package for the manipulation and analysis of planar geometric
     objects.
 

docs/source/whatsnew/v0.21.rst

@@ -1,5 +1,8 @@
-Version 0.21 (September XXX, 2022)
-==================================
+Version 0.21 (September 9, 2022)
+================================
+
+Cartopy v0.21 is not compatible with Shapely 2.0, so this release
+has an upper pin on Shapely to avoid installing newer versions.
 
 For a full list of included Pull Requests and closed Issues, please see the
 `0.21 milestone <https://github.com/SciTools/cartopy/milestone/30>`_.

environment.yml

@@ -4,13 +4,13 @@
 #   conda activate cartopy-dev
 #   pip install -e .
 #
-name: cartopy-dev
+name: cartopy-dev2
 channels:
   - conda-forge
 dependencies:
   - cython>=0.28.5
   - numpy>=1.18
-  - shapely>=1.6.4
+  - shapely>=1.6.4,<2
   - geos>=3.7.2
   - pyshp>=2.1
   - pyproj>=3.0.0

requirements/default.txt

@@ -1,5 +1,5 @@
 numpy>=1.18
 matplotlib>=3.1
-shapely>=1.6.4
+shapely>=1.6.4,<2
 pyshp>=2.1
 pyproj>=3.0.0