Use cache

.github/workflows/lint.yml

@@ -19,15 +19,46 @@ jobs:
       - uses: actions/checkout@v2.3.4
         with:
           submodules: recursive
+      
+      - name: Set cache date
+        run: echo "DATE=$(date +'%Y%m%d')" >> $GITHUB_ENV
+
+      - name: Cache conda packages
+        uses: actions/cache@v2.1.7
+        env:
+          # Increase this value to manually invalidate the cache
+          CACHE_NUMBER: 0
+        with:
+          path: ~/conda_pkgs_dir
+          key:
+            ${{runner.os}}-conda-${{ env.CACHE_NUMBER }}-${env.date}-${{ hashFiles('.github/lint-environment.yml') }}
+
+      - name: Cache conda environment
+        uses: actions/cache@v2.1.7
+        env:
+          # Increase this value to manually invalidate the cache
+          CACHE_NUMBER: 0
+        with:
+          path: /usr/share/miniconda/envs/biowdl-lint
+          key:
+            ${{runner.os}}-biowdl-lint-${{ env.CACHE_NUMBER }}-${{ hashFiles('.github/lint-environment.yml') }}
+          id: env_cache
+
       - name: install miniconda
-        uses: conda-incubator/setup-miniconda@v2.0.1
+        uses: conda-incubator/setup-miniconda@v2.1.1
         with:
+          miniforge-variant: Mambaforge
+          miniforge-version: latest
+          use-mamba: true
           channels: conda-forge,bioconda,defaults
           channel-priority: strict
-          installer-url: https://github.com/conda-forge/miniforge/releases/download/4.11.0-0/Mambaforge-4.11.0-0-Linux-x86_64.sh
-        # Conda-incubator uses 'test' environment by default.
-      - name: install requirements
+          auto-activate-base: false
+          activate-environment: biowdl-lint
+      
+      - name: Update test environment
         run: mamba install -n test cromwell miniwdl wdl-aid
+        if: steps.env_cache.outputs.cache-hit != 'true'
+
       - name: run womtool validate
         run: |
           bash -c '