Upgrade SymPy Version & Extend CI

• Raise SymPy upper limit to 1.12.1
• Introduce nightly tests against sympy pre-releases

.gitlab-ci.yml

 stages:
   - pretest
   - test
+  - nightly
   - deploy
 
+# --------------------------  Templates ------------------------------------------------------------------------------------
+
+# Base configuration for jobs meant to run at every commit
+.every-commit:
+  rules:
+    - if: $CI_PIPELINE_SOURCE != "schedule"
+
+# Base configuration for jobs meant to run at a schedule
+.scheduled:
+  rules:
+    - if: $CI_PIPELINE_SOURCE == "schedule"
 
 # --------------------------  Pre Tests --------------------------------------------------------------------------------
 
 # Normal test - runs on every commit all but "long run" tests
 tests-and-coverage:
   stage: pretest
-  except:
-    variables:
-      - $ENABLE_NIGHTLY_BUILDS
+  extends: .every-commit
   image: i10git.cs.fau.de:5005/pycodegen/pycodegen/full
   script:
     # - pip install sympy --upgrade
@@ -62,9 +72,7 @@ tests-and-coverage-with-longrun:
 
 minimal-conda:
   stage: pretest
-  except:
-    variables:
-      - $ENABLE_NIGHTLY_BUILDS
+  extends: .every-commit
   image: i10git.cs.fau.de:5005/pycodegen/pycodegen/minimal_conda
   script:
     - pip install git+https://gitlab-ci-token:${CI_JOB_TOKEN}@i10git.cs.fau.de/pycodegen/pystencils.git@master#egg=pystencils
@@ -76,9 +84,7 @@ minimal-conda:
 # Linter for code formatting
 flake8-lint:
   stage: pretest
-  except:
-    variables:
-      - $ENABLE_NIGHTLY_BUILDS
+  extends: .every-commit
   image: i10git.cs.fau.de:5005/pycodegen/pycodegen/full
   script:
     - flake8 src/lbmpy
@@ -91,9 +97,7 @@ flake8-lint:
 # pipeline with latest python version
 latest-python:
   stage: test
-  except:
-    variables:
-      - $ENABLE_NIGHTLY_BUILDS
+  extends: .every-commit
   image: i10git.cs.fau.de:5005/pycodegen/pycodegen/latest_python
   before_script:
     - pip install git+https://gitlab-ci-token:${CI_JOB_TOKEN}@i10git.cs.fau.de/pycodegen/pystencils.git@master#egg=pystencils
@@ -133,9 +137,7 @@ latest-python:
 
 minimal-sympy-master:
   stage: test
-  except:
-    variables:
-      - $ENABLE_NIGHTLY_BUILDS
+  extends: .every-commit
   image: i10git.cs.fau.de:5005/pycodegen/pycodegen/minimal_conda
   before_script:
     - pip install -e .
@@ -151,9 +153,7 @@ minimal-sympy-master:
 
 ubuntu:
   stage: test
-  except:
-    variables:
-      - $ENABLE_NIGHTLY_BUILDS
+  extends: .every-commit
   image: i10git.cs.fau.de:5005/pycodegen/pycodegen/ubuntu
   before_script:
     # - apt-get -y remove python3-sympy
@@ -175,45 +175,76 @@ ubuntu:
     reports:
       junit: report.xml
 
-pycodegen-integration:
-  image: i10git.cs.fau.de:5005/pycodegen/pycodegen/full
-  stage: test
-  when: manual
-  allow_failure: true
+# pycodegen-integration:
+#   image: i10git.cs.fau.de:5005/pycodegen/pycodegen/full
+#   stage: test
+#   when: manual
+#   allow_failure: true
+#   script:
+#     - env
+#     - pip list
+#     - git clone https://gitlab-ci-token:${CI_JOB_TOKEN}@i10git.cs.fau.de/pycodegen/pycodegen.git
+#     - cd pycodegen
+#     - git submodule sync --recursive
+#     - git submodule update --init --recursive
+#     - git submodule foreach git fetch origin   # compare the latest master version!
+#     - git submodule foreach git reset --hard origin/master
+#     - cd lbmpy
+#     - git remote add test $CI_REPOSITORY_URL
+#     - git fetch test
+#     - git reset --hard $CI_COMMIT_SHA
+#     - cd ..
+#     - pip install -e pystencils/
+#     - pip install -e lbmpy/
+#     - ./install_walberla.sh
+#     # build all integration tests
+#     - cd walberla/build/
+#     - make -j $NUM_CORES MicroBenchmarkGpuLbm LbCodeGenerationExample
+#     - cd apps/benchmarks/UniformGridGPU
+#     - make -j $NUM_CORES
+#     - cd ../UniformGridCPU
+#     - make -j $NUM_CORES
+
+#   tags:
+#     - docker
+#     - cuda11
+#     - AVX
+
+
+# -------------------- Scheduled Tasks --------------------------------------------------------------------------
+
+
+nightly-sympy:
+  stage: nightly
+  extends: .scheduled
+  image: i10git.cs.fau.de:5005/pycodegen/pycodegen/latest_python
+  before_script:
+    - pip install -e .
+    - pip install git+https://gitlab-ci-token:${CI_JOB_TOKEN}@i10git.cs.fau.de/pycodegen/pystencils.git@master#egg=pystencils
+    - pip install --upgrade --pre sympy
   script:
     - env
     - pip list
-    - git clone https://gitlab-ci-token:${CI_JOB_TOKEN}@i10git.cs.fau.de/pycodegen/pycodegen.git
-    - cd pycodegen
-    - git submodule sync --recursive
-    - git submodule update --init --recursive
-    - git submodule foreach git fetch origin   # compare the latest master version!
-    - git submodule foreach git reset --hard origin/master
-    - cd lbmpy
-    - git remote add test $CI_REPOSITORY_URL
-    - git fetch test
-    - git reset --hard $CI_COMMIT_SHA
-    - cd ..
-    - pip install -e pystencils/
-    - pip install -e lbmpy/
-    - ./install_walberla.sh
-    # build all integration tests
-    - cd walberla/build/
-    - make -j $NUM_CORES MicroBenchmarkGpuLbm LbCodeGenerationExample
-    - cd apps/benchmarks/UniformGridGPU
-    - make -j $NUM_CORES
-    - cd ../UniformGridCPU
-    - make -j $NUM_CORES
-
+    - export NUM_CORES=$(nproc --all)
+    - mkdir -p ~/.config/matplotlib
+    - echo "backend:template" > ~/.config/matplotlib/matplotlibrc
+    - mkdir public
+    - pytest -v -n $NUM_CORES -m "not longrun" --junitxml=report.xml
   tags:
     - docker
-    - cuda11
     - AVX
+    - cuda
+  artifacts:
+    when: always
+    reports:
+      junit: report.xml
+
 
 # -------------------- Documentation and deploy ------------------------------------------------------------------------
 
 build-documentation:
   stage: test
+  extends: .every-commit
   image: i10git.cs.fau.de:5005/pycodegen/pycodegen/documentation
   before_script:
     - pip install -e .