Move to GitHub actions

.github/workflows/build.yml

@@ -0,0 +1,52 @@
+name: build
+
+on:
+  push:
+  pull_request:
+
+env:
+  # USE UTF8 ENCODING. SHOULD BE DEFAULT, BUT THIS IS INSURANCE AGAINST FUTURE CHANGES
+  PYTHONIOENCODING: UTF8
+
+jobs:
+  build:
+    name: build and install from source
+    runs-on: ubuntu-latest
+    defaults:
+      run:
+        shell: bash -l {0}
+    env:
+      COSMO_FILES_SOURCE: ${{ github.workspace }}/tests/data
+      COSMO_OUTPUT: ${{ github.workspace }}/tests
+      COSMO_SMS_DB: ${{ github.workspace }}/tests/test.db
+      COSMO_SMS_SOURCE: ${{ github.workspace }}/tests/data
+      CRDS_SERVER_URL: 'https://hst-crds.stsci.edu'
+      CRDS_PATH: ${{ github.workspace }}/tests/data/test_crds_cache
+      DARK_PROGRAMS:
+      MONITOR_CONFIG: ${{ github.workspace }}/tests/cosmoconfig_test.yaml
+
+    steps:
+      - name: checkout code
+        uses: actions/checkout@v2
+
+      - name: install conda
+        uses: conda-incubator/setup-miniconda@v2
+        with:
+          auto-update-conda: true
+          python-version: '3.7'
+          channels: http://ssb.stsci.edu/astroconda
+
+      - name: install dependencies
+        run: |
+          conda install -c anaconda setuptools
+          conda install stsci coverage
+          pip install codecov
+
+      - name: install from source
+        run: pip install .
+
+      - name: run tests
+        run: coverage run -m pytest
+
+      - name: run codecov
+        run: codecov