Add caching to tests (#39)

* Avoid running the same tests twice in a PR

* Cache python venv install

* Set up cache for socrates

* Move apt install back to the top

* Fix path and cache key

* Pull to local directory

* Fix path to version file

* Trigger workflow

* Add caching for FWL_DATA directory

* Expand path

.github/workflows/tests.yaml

@@ -2,7 +2,11 @@ name: Tests for JANUS
 
 on:
   push:
+    branches:
+      - master
   pull_request:
+    branches:
+      - master
   workflow_dispatch:
 
 jobs:
@@ -16,38 +20,59 @@ jobs:
     steps:
       - uses: actions/checkout@v4
 
+      - name: Setup system
+        run: |
+          sudo apt-get install libnetcdff-dev netcdf-bin gfortran gcc
+
       - name: Get SOCRATES
         uses: actions/checkout@v4
         with:
           repository: 'FormingWorlds/SOCRATES'
           path: 'SOCRATES'
 
-      - name: Setup system
-        run: |
-          sudo apt update
-          sudo apt-get install libnetcdff-dev netcdf-bin gfortran gcc
-
-      - name: Set up Python ${{ matrix.python-version }}
-        uses: actions/setup-python@v4
+      - uses: actions/cache@v3
+        id: cache-socrates
         with:
-          python-version: ${{ matrix.python-version }}
+          path: |
+            SOCRATES/bin
+            SOCRATES/sbin
+            SOCRATES/set_rad_env
+          key: socrates-${{ hashFiles('SOCRATES/version') }}
 
       - name: Build SOCRATES
+        if: steps.cache-socrates.outputs.cache-hit != 'true'
         run: |
           export LD_LIBRARY_PATH=""
           cd SOCRATES
           ./configure
           ./build_code 
-          source set_rad_env
           cd ..
 
+      - name: Set up Python ${{ matrix.python-version }}
+        uses: actions/setup-python@v5
+        with:
+          python-version: ${{ matrix.python-version }}
+
+      - uses: actions/cache@v3
+        id: cache-virtualenv
+        with:
+          path: ${{ env.pythonLocation }}
+          key: ${{ env.pythonLocation }}-${{ hashFiles('pyproject.toml') }}
+
       - name: Build JANUS
+        if: steps.cache-virtualenv.outputs.cache-hit != 'true'
         run: |
           python -m pip install -e .[develop]
 
+      - uses: actions/cache@v3
+        id: cache-fwl-data
+        with:
+          path: /home/runner/work/fwl_data
+          key: fwl-data-1
+
       - name: Test with pytest
         run: |
-          export FWL_DATA="./fwl_data"
+          export FWL_DATA="/home/runner/work/fwl_data"
           source SOCRATES/set_rad_env
           coverage run -m pytest