Use Action for miniconda

Author: ax3l

.github/workflows/conda.yml

@@ -15,6 +15,14 @@ jobs:
       CXXFLAGS: "-Werror"
     steps:
     - uses: actions/checkout@v3
+    - uses: conda-incubator/setup-miniconda@v2
+      name: Setup conda
+      with:
+        auto-update-conda: true
+        activate-environment: testing
+        auto-activate-base: false
+        channels: conda-forge,defaults
+        channel-priority: true
     - name: install dependencies
       run: |
         .github/workflows/dependencies/conda.sh
@@ -24,15 +32,13 @@ jobs:
       # - for a refresh the key has to change, e.g., hash of a tracked file in the key
       with:
         path: |
-          ~/.ccache
           ~/.cache/ccache
-        key: ccache-conda-linux-${{ hashFiles('.github/workflows/ubuntu.yml') }}-${{ hashFiles('cmake/dependencies/AMReX.cmake') }}
+        key: ccache-conda-linux-${{ hashFiles('.github/workflows/conda.yml') }}-${{ hashFiles('cmake/dependencies/AMReX.cmake') }}
         restore-keys: |
-          ccache-conda-linux-${{ hashFiles('.github/workflows/ubuntu.yml') }}-
+          ccache-conda-linux-${{ hashFiles('.github/workflows/conda.yml') }}-
           ccache-conda-linux-
     - name: build WarpX
       run: |
-        source activate base
         cmake -S . -B build            \
           -DCMAKE_VERBOSE_MAKEFILE=ON  \
           -DWarpX_EB=ON                \

.github/workflows/dependencies/conda.sh

@@ -7,8 +7,6 @@
 
 set -eu -o pipefail
 
-conda init bash
-
 conda update -y -n base conda
 conda install -y -n base conda-libmamba-solver
 conda config --set solver libmamba