Update continuous integration system

.codespellrc

@@ -0,0 +1,7 @@
+# See: https://github.com/codespell-project/codespell#using-a-config-file
+[codespell]
+# In the event of a false positive, add the problematic word, in all lowercase, to a comma-separated list here:
+ignore-words-list = ,
+check-filenames =
+check-hidden =
+skip = ./.git,./src/utility/ioexpander/I2Cdev.*,./src/utility/ioexpander/TCA6424A.*,./src/utility/QEI,./src/utility/RS485,

.github/dependabot.yml

@@ -0,0 +1,10 @@
+# See: https://docs.github.com/en/github/administering-a-repository/configuration-options-for-dependency-updates#about-the-dependabotyml-file
+version: 2
+
+updates:
+  # Configure check for outdated GitHub Actions actions in workflows.
+  # See: https://docs.github.com/en/github/administering-a-repository/keeping-your-actions-up-to-date-with-dependabot
+  - package-ecosystem: github-actions
+    directory: / # Check the repository's workflows under /.github/workflows/
+    schedule:
+      interval: daily

.github/workflows/check-arduino.yml

@@ -0,0 +1,28 @@
+name: Check Arduino
+
+# See: https://docs.github.com/en/free-pro-team@latest/actions/reference/events-that-trigger-workflows
+on:
+  push:
+  pull_request:
+  schedule:
+    # Run every Tuesday at 8 AM UTC to catch breakage caused by new rules added to Arduino Lint.
+    - cron: "0 8 * * TUE"
+  workflow_dispatch:
+  repository_dispatch:
+
+jobs:
+  lint:
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v2
+
+      - name: Arduino Lint
+        uses: arduino/arduino-lint-action@v1
+        with:
+          compliance: strict
+          library-manager: submit
+          # Always use this setting for official repositories. Remove for 3rd party projects.
+          official: true
+          project-type: library

.github/workflows/compile-examples.yml

@@ -4,11 +4,13 @@ on:
   pull_request:
     paths:
       - ".github/workflows/compile-examples.yml"
+      - "library.properties"
       - "src/**"
       - "examples/**"
   push:
     paths:
       - ".github/workflows/compile-examples.yml"
+      - "library.properties"
       - "src/**"
       - "examples/**"
   # Scheduled trigger checks for breakage caused by changes to external resources (libraries, platforms)
@@ -30,42 +32,16 @@ jobs:
   compile-examples:
     runs-on: ubuntu-latest
 
-    env:
-      ARDUINOCORE_MBED_STAGING_PATH: extras/ArduinoCore-mbed
-      ARDUINOCORE_API_STAGING_PATH: extras/ArduinoCore-API
-
     steps:
       - name: Checkout repository
         uses: actions/checkout@v2
 
-      # It's necessary to checkout the platform before installing it so that the ArduinoCore-API dependency can be added
-      - name: Checkout ArduinoCore-mbed
-        uses: actions/checkout@v2
-        with:
-          repository: arduino/ArduinoCore-mbed
-          # The arduino/actions/libraries/compile-examples action will install the platform from this path
-          path: ${{ env.ARDUINOCORE_MBED_STAGING_PATH }}
-
-      - name: Checkout ArduinoCore-API
-        uses: actions/checkout@v2
-        with:
-          repository: arduino/ArduinoCore-API
-          path: ${{ env.ARDUINOCORE_API_STAGING_PATH }}
-
-      - name: Install ArduinoCore-API
-        run: |
-          mv "${{ env.ARDUINOCORE_API_STAGING_PATH }}/api" "${{ env.ARDUINOCORE_MBED_STAGING_PATH }}/cores/arduino"
-
       - name: Compile example sketches
-        uses: arduino/compile-sketches@main
+        uses: arduino/compile-sketches@v1
         with:
-          fqbn: arduino:mbed:envie_m7
+          fqbn: arduino:mbed_portenta:envie_m7
           platforms: |
-            # Install Arduino mbed-Enabled Boards via Boards Manager for the toolchain
-            - name: arduino:mbed
-            # Overwrite the Arduino mbed-Enabled Boards release version with version from the tip of the master branch (located in local path because of the need to first install ArduinoCore-API)
-            - source-path: extras/ArduinoCore-mbed
-              name: arduino:mbed
+            - name: arduino:mbed_portenta
           enable-deltas-report: true
           enable-warnings-report: true
           sketches-report-path: ${{ env.SKETCHES_REPORTS_PATH }}
@@ -74,21 +50,27 @@ jobs:
       - name: Save memory usage change report as artifact
         uses: actions/upload-artifact@v2
         with:
+          if-no-files-found: error
           path: ${{ env.SKETCHES_REPORTS_PATH }}
           name: ${{ env.SKETCHES_REPORTS_ARTIFACT_NAME }}
 
   report:
     needs: compile-examples
     # Only run the job when the workflow is triggered by a pull request from this repository (because arduino/report-size-deltas requires write permissions)
-    if: github.event_name == 'pull_request' && github.event.pull_request.head.repo.full_name == github.repository
+    if: always() && github.event_name == 'pull_request' && github.event.pull_request.head.repo.full_name == github.repository
     runs-on: ubuntu-latest
     steps:
       - name: Download sketches reports artifact
+        id: download-artifact
+        continue-on-error: true # If compilation failed for all boards then there are no artifacts
         uses: actions/download-artifact@v2
         with:
           name: ${{ env.SKETCHES_REPORTS_ARTIFACT_NAME }}
           path: ${{ env.SKETCHES_REPORTS_PATH }}
 
-      - uses: arduino/report-size-deltas@main
+      - name: Comment size deltas report to PR
+        uses: arduino/report-size-deltas@v1
+        # If actions/download-artifact failed, there are no artifacts to report from.
+        if: steps.download-artifact.outcome == 'success'
         with:
           sketches-reports-source: ${{ env.SKETCHES_REPORTS_PATH }}

.github/workflows/spell-check.yml

@@ -0,0 +1,22 @@
+name: Spell Check
+
+# See: https://docs.github.com/en/free-pro-team@latest/actions/reference/events-that-trigger-workflows
+on:
+  push:
+  pull_request:
+  schedule:
+    # Run every Tuesday at 8 AM UTC to catch new misspelling detections resulting from dictionary updates.
+    - cron: "0 8 * * TUE"
+  workflow_dispatch:
+  repository_dispatch:
+
+jobs:
+  spellcheck:
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v2
+
+      - name: Spell check
+        uses: codespell-project/actions-codespell@master