Update CI/CD pipeline to speed up checks on PRs not altering the Python package

.github/workflows/ci_cd.yml

@@ -100,15 +100,29 @@ jobs:
         with:
           fetch-depth: 0
 
-#      - name: Install Gazebo Classic
-#        if: contains(matrix.os, 'ubuntu')
-#        run: |
-#          sudo apt-get update
-#          sudo apt-get install gazebo
+      - uses: dorny/paths-filter@v3
+        id: changes
+        with:
+          filters: |
+            conf: &conf
+              - 'pyproject.toml'
+              - 'setup.cfg'
+              - 'setup.py'
+            src: &src
+              - 'src/**'
+            tests: &tests
+              - 'tests/**'
+            all:
+              - *conf
+              - *src
+              - *tests
 
       # https://gazebosim.org/docs/harmonic/install_ubuntu
       - name: Install Gazebo Sim
-        if: contains(matrix.os, 'ubuntu')
+        if: |
+          contains(matrix.os, 'ubuntu') &&
+          (github.event_name != 'pull_request' ||
+           steps.changes.outputs.all == 'true')
         run: |
           sudo apt-get update
           sudo apt-get install lsb-release wget gnupg
@@ -118,7 +132,10 @@ jobs:
           sudo apt-get install gz-harmonic
 
       - name: Run the Python tests
-        if: contains(matrix.os, 'ubuntu')
+        if: |
+          contains(matrix.os, 'ubuntu') &&
+          (github.event_name != 'pull_request' ||
+           steps.changes.outputs.all == 'true')
         run: pytest
         env:
           JAX_PLATFORM_NAME: cpu

.github/workflows/style.yml

@@ -10,7 +10,6 @@ on:
 jobs:
 
   black:
-
     name: black
     runs-on: ubuntu-latest
 
@@ -22,15 +21,17 @@ jobs:
       - name: '🐍 Initialize Python'
         uses: actions/setup-python@v5
         with:
-          python-version: "3.8"
+          python-version: "3.*"
 
+      # Note: the black version needs to be in sync with what
+      # specified in setup.cfg.
       - name: "📝 Black Code Formatter"
         uses: psf/black@stable
         with:
-          options: --check --diff --color
+          options: "--check --diff --color"
+          version: "~= 24.0"
 
   isort:
-
     name: isort
     runs-on: ubuntu-latest
 
@@ -42,18 +43,17 @@ jobs:
       - name: '🐍 Initialize Python'
         uses: actions/setup-python@v5
         with:
-          python-version: "3.8"
+          python-version: "3.*"
 
       # Workaround for https://github.com/isort/isort-action/issues/70
       - run: pip install colorama
 
       - name: "📝 isort"
         uses: isort/isort-action@master
         with:
-          configuration: --check --diff --color
+          configuration: "--check --diff --color"
 
   ruff:
-
     name: ruff
     runs-on: ubuntu-latest
 

environment.yml

@@ -14,7 +14,7 @@ dependencies:
   - typing_extensions # python<3.12
   # Optional dependencies from setup.cfg
   # [style]
-  - black
+  - black == 24.*
   - isort
   # [testing]
   - idyntree

setup.cfg

@@ -66,7 +66,8 @@ where = src
 
 [options.extras_require]
 style =
-    black[jupyter]
+    # Note: keep the black version in sync with style.yml and environment.yml.
+    black[jupyter] ~= 24.0
     isort
     pre-commit
 testing =