Update python-package-conda.yml

.github/workflows/python-package-conda.yml

@@ -1,6 +1,12 @@
 name: Python Package using Conda
 
-on: [push]
+on:
+  push:
+    branches:
+      - main
+  pull_request:
+    branches:
+      - main
 
 jobs:
   build-linux:
@@ -10,24 +16,35 @@ jobs:
 
     steps:
     - uses: actions/checkout@v4
+
     - name: Set up Python 3.10
       uses: actions/setup-python@v3
       with:
         python-version: '3.10'
-    - name: Add conda to system path
-      run: |
-        # $CONDA is an environment variable pointing to the root of the miniconda directory
-        echo $CONDA/bin >> $GITHUB_PATH
+
+    - name: Setup Conda
+      uses: conda-incubator/setup-miniconda@v2
+      with:
+        activate-environment: base
+        auto-activate-base: true
+
+    - name: Cache dependencies
+      uses: actions/cache@v3
+      with:
+        path: ~/.conda/envs/base
+        key: ${{ runner.os }}-conda-${{ hashFiles('environment.yml') }}
+        restore-keys: |
+          ${{ runner.os }}-conda-
+
     - name: Install dependencies
-      run: |
-        conda env update --file environment.yml --name base
+      run: conda env update --file environment.yml --name base
+
     - name: Lint with flake8
       run: |
         conda install flake8
-        # stop the build if there are Python syntax errors or undefined names
         flake8 . --count --select=E9,F63,F7,F82 --show-source --statistics
-        # exit-zero treats all errors as warnings. The GitHub editor is 127 chars wide
         flake8 . --count --exit-zero --max-complexity=10 --max-line-length=127 --statistics
+
     - name: Test with pytest
       run: |
         conda install pytest