Migrate to GitHub Actions

.github/workflows/black.yml

@@ -0,0 +1,39 @@
+# This workflow will test the code base using the LATEST version of black
+
+# IMPORTANT: Black is under development. Hence, minor fommatting changes between
+# different version are expected.
+# If this test fails, install the latest version of black and then run black.
+# Preferably, run black only on the files that you have modified.
+# This will faciliate the revision of the proposed changes.
+
+name: Black
+
+on:
+  # Triggers the workflow on push or pull request events but only for the master branch
+  push:
+    branches: [ master ]
+  pull_request:
+    branches: [ master ]
+
+jobs:
+  build:
+
+    runs-on: ubuntu-latest
+
+    steps:
+      - uses: actions/checkout@v2
+      - name: Set up Python 3.8
+        uses: actions/setup-python@v2
+        with:
+          python-version: 3.8
+      - name: Install dependencies
+        run: |
+          python -m pip install --upgrade pip
+          pip install black
+
+      - name: Black version
+        run: black --version
+
+      - name: Black check
+        working-directory: ${{github.workspace}}
+        run: black --check .

.github/workflows/test_pysteps.yml

@@ -0,0 +1,108 @@
+name: Test Pysteps installation
+
+env:
+  MINIMAL_DEPENDENCIES: cython numpy jsmin jsonschema matplotlib netCDF4 opencv pillow pyproj scipy dask
+  OPTIONAL_DEPENDENCIES: dask pyfftw cartopy h5py PyWavelets
+  TEST_DEPENDENCIES: pytest pytest-cov codecov
+
+on:
+  # Triggers the workflow on push or pull request events but only for the master branch
+  push:
+    branches: [ master ]
+  pull_request:
+    branches: [ master ]
+
+jobs:
+  unit_tests:
+    name: Unit Tests (${{ matrix.python-version }}, ${{ matrix.os }})
+    runs-on: ${{ matrix.os }}
+
+    strategy:
+      fail-fast: false
+      matrix:
+        os: [ "ubuntu-latest", "macos-latest", "windows-latest" ]
+        python-version: [ "3.6", "3.8" ]
+      max-parallel: 6
+
+    defaults:
+      run:
+        shell: bash -l {0}
+
+    steps:
+      - uses: actions/checkout@v2
+      - uses: actions/setup-python@v2
+        with:
+          python-version: ${{ matrix.python-version }}
+
+      - name: Setup Miniconda
+        uses: conda-incubator/setup-miniconda@v2.0.0
+        with:
+          auto-update-conda: true
+          python-version: ${{ matrix.python-version }}
+          channels: conda-forge
+          channel-priority: flexible
+          activate-environment: test-environment
+
+      - name: Install dependencies
+        env:
+          PACKAGES: ${{env.MINIMAL_DEPENDENCIES}} ${{env.OPTIONAL_DEPENDENCIES}} ${{env.TEST_DEPENDENCIES}}
+          PYSTEPS_DATA_PATH: ${{github.workspace}}/pysteps_data
+        run: |
+          conda install --quiet ${{env.PACKAGES}}
+
+      - name: Install pysteps for MacOS
+        if: matrix.os == 'macos-latest'
+        working-directory: ${{github.workspace}}
+        env:
+          CC: gcc-9
+          CXX: g++-9
+          CXX1X: g++-9
+          HOMEBREW_NO_INSTALL_CLEANUP: 1
+        run: |
+          brew update-reset
+          brew update
+          brew install gcc@9
+          gcc-9 --version
+          pip install .
+
+      - name: Install pygrib (not win)
+        if: matrix.os != 'windows-latest'
+        run: conda install --quiet pygrib
+
+      - name: Install pysteps
+        if: matrix.os != 'macos-latest'
+        working-directory: ${{github.workspace}}
+        run: pip install .
+
+      - name: Download pysteps data
+        env:
+          PYSTEPS_DATA_PATH: ${{github.workspace}}/pysteps_data
+        working-directory: ${{github.workspace}}/ci
+        run: python fetch_pysteps_data.py
+
+      - name: Check imports
+        working-directory: ${{github.workspace}}/pysteps_data
+        run: |
+          python -c "import pysteps; print(pysteps.__file__)"
+          python -c "from pysteps import motion"
+          python -c "from pysteps.motion import vet"
+          python -c "from pysteps.motion import proesmans"
+
+      - name: Run tests and coverage report
+        working-directory: ${{github.workspace}}/pysteps_data
+        env:
+          PYSTEPSRC: ${{github.workspace}}/pysteps_data/pystepsrc
+        run: pytest --pyargs pysteps --cov=pysteps --cov-report=xml --cov-report=term -ra
+
+      - name: Upload coverage to Codecov (Linux only)
+        if: matrix.os == 'ubuntu-latest'
+        uses: codecov/codecov-action@v1
+        env:
+          OS: ${{ matrix.os }}
+          PYTHON: ${{ matrix.python-version }}
+        with:
+          file: ${{github.workspace}}/pysteps_data/coverage.xml
+          flags: unit_tests
+          env_vars: OS,PYTHON
+          fail_ci_if_error: true
+          verbose: true

ci/fetch_pysteps_data.py

@@ -3,17 +3,17 @@
 Script used to install the pysteps data in a test environment and set a pystepsrc
 configuration file that points to that data.
 
-The test data is downloaded in the `PYSTEPS_DATA_DIR` environmental variable.
+The test data is downloaded in the `PYSTEPS_DATA_PATH` environmental variable.
 
 After this script is run, the `PYSTEPSRC` environmental variable should be set to
-PYSTEPSRC=$PYSTEPS_DATA_DIR/pystepsrc for pysteps to use that configuration file.
+PYSTEPSRC=$PYSTEPS_DATA_PATH/pystepsrc for pysteps to use that configuration file.
 """
 
 import os
 
 from pysteps.datasets import create_default_pystepsrc, download_pysteps_data
 
-tox_test_data_dir = os.environ["PYSTEPS_DATA_DIR"]
+tox_test_data_dir = os.environ["PYSTEPS_DATA_PATH"]
 
 download_pysteps_data(tox_test_data_dir, force=True)
 

pysteps/datasets.py

@@ -324,7 +324,8 @@ def download_pysteps_data(dir_path, force=True):
     pbar = ShowProgress()
     print("Downloading pysteps-data from github.")
     tmp_file_name, _ = request.urlretrieve(
-        "https://github.com/pySTEPS/pysteps-data/archive/master.zip", reporthook=pbar,
+        "https://github.com/pySTEPS/pysteps-data/archive/master.zip",
+        reporthook=pbar,
     )
     pbar.end(message="Download complete\n")
 
@@ -354,7 +355,7 @@ def create_default_pystepsrc(
     pystepsrc, pystepsrc.1, pystepsrc.2, etc. exist, they are renamed to respectively
     pystepsrc.1, pystepsrc.2, pystepsrc.2, etc. Finally, after the existing files are
     backed up, the new configuration file is written.
-    
+
     Parameters
     ----------
 
@@ -414,7 +415,7 @@ def create_default_pystepsrc(
         with open(dest_path, "w") as f:
             json.dump(rcparams_json, f, indent=4)
 
-    return dest_path
+    return os.path.normpath(dest_path)
 
 
 def load_dataset(case="fmi", frames=14):

pysteps/tests/test_datasets.py

@@ -78,7 +78,12 @@ def _default_path():
 
 @pytest.mark.parametrize("config_dir, file_name, expected_path", test_params_paths)
 def test_params_file_creation_path(config_dir, file_name, expected_path):
-    """Test that the default pysteps parameters file is create in the right place."""
+    """Test that the default pysteps parameters file is created in the right place."""
+
+    # For windows compatibility
+    if config_dir is not None:
+        config_dir = os.path.normpath(config_dir)
+    expected_path = os.path.normpath(expected_path)
 
     pysteps_data_dir = "dummy/path/to/data"
     params_file_path = create_default_pystepsrc(