ci: Remove mypy deps install step in python_cache action (#3956)

* Remove mypy deps install step in python_cache action

* Remove step caching mypy dependencies

* Add ignore files in changed files retrieval step

.github/actions/python_cache/action.yml

@@ -41,14 +41,6 @@ runs:
       # The cache will be rebuild every day and at every change of the dependency files
       key: ${{ inputs.prefix }}-py${{ inputs.pythonVersion }}-${{ env.date }}-${{ hashFiles('**/pyproject.toml') }}
 
-  - name: Cache Mypy path
-    id: cache-mypy
-    uses: actions/cache@v3
-    with:
-      path: ${{ env.pythonLocation }}/.mypy_cache
-      # The cache will be rebuild every day and at every change of the dependency files
-      key: mypy-${{ inputs.prefix }}-py${{ inputs.pythonVersion }}-${{ env.date }}-${{ hashFiles('**/pyproject.toml') }}
-
   - name: Install dependencies
     # NOTE: this action runs only on cache miss to refresh the dependencies and make sure the next Haystack install will be faster.
     # Do not rely on this step to install Haystack itself!
@@ -60,8 +52,3 @@ runs:
       python -m pip install --upgrade pip
       pip install .[all]
       pip install rest_api/
-
-  - name: Install mypy dependencies
-    shell: bash
-    if: inputs.pythonVersion != 3.7
-    run: python -m mypy --install-types --non-interactive --cache-dir=${{ env.pythonLocation }}/.mypy_cache/ haystack/ rest_api/ --exclude=rest_api/build/ --exclude=rest_api/test/

.github/workflows/tests.yml

@@ -87,18 +87,12 @@ jobs:
     - name: Get changed files
       id: files
       uses: tj-actions/changed-files@v34
-
-    - name: Filter changed files
-      id: python-files
-      run: |
-        for file in ${{ steps.files.outputs.all_changed_files }}; do
-          if [[ $file == *.py ]]; then
-            if [[ $file != test/* ]]; then
-              changed_files="$changed_files $file"
-            fi
-          fi
-        done
-        echo "changed_files=$changed_files" >> $GITHUB_OUTPUT
+      with:
+        files: |
+          *.py
+        files_ignore: |
+          test/**
+          rest_api/test/**
 
     - name: Setup Python
       uses: ./.github/actions/python_cache/
@@ -109,7 +103,7 @@ jobs:
       if: steps.python-files.outputs.changed_files
       run: |
         mkdir .mypy_cache/
-        mypy ${{ steps.python-files.outputs.changed_files }}
+        mypy --install-types --non-interactive ${{ steps.python-files.outputs.changed_files }} --exclude=rest_api/build/ --exclude=rest_api/test/
 
     - uses: act10ns/slack@v1
       with: