GitHub Actions CI flow.

.github/workflows/ci.yml

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+name: ci
+on: [push]
+jobs:
+  setup:
+    runs-on: self-hosted
+    steps:
+      - name: Check out repository
+        uses: actions/checkout@v1
+      - name: Hello
+        run: echo "Hello, world!"
+  scn4me_subm:
+    # Run this first since it is faster
+    needs: setup
+    runs-on: self-hosted
+    steps:
+      - name: SCMOS test
+        run: |
+         . /home/github-runner/setup-paths.sh 
+         export OPENRAM_HOME="`pwd`/compiler"
+         export OPENRAM_TECH="`pwd`/technology:/software/PDKs/skywater-tech"
+         python3-coverage run -p $OPENRAM_HOME/tests/regress.py -j 32 -t scn4m_subm
+  freepdk45:
+    # Run this second and only if the first passes
+    needs: scn4me_subm
+    runs-on: self-hosted
+    steps:
+      - name: FreePDK45 test
+        run: |
+         . /home/github-runner/setup-paths.sh 
+         export OPENRAM_HOME="`pwd`/compiler"
+         export OPENRAM_TECH="`pwd`/technology:/software/PDKs/skywater-tech"
+         python3-coverage run -p $OPENRAM_HOME/tests/regress.py -j 32 -t freepdk45
+  coverage:
+    needs: [scn4me_subm, freepdk45]
+    runs-on: self-hosted
+    steps:
+      - name: Coverage stats
+        run: |
+         python3-coverage combine
+         python3-coverage report
+         python3-coverage html -d coverage_html
+      - name: Archive coverage
+        uses: actions/upload-artifact@v2
+        with:
+         name: code-coverage-report
+         path: coverage_html/
+