Update "smoke test" examples compilation CI workflow

On every push or pull request that affects library source or example files, and periodically, compile all example
sketches for the specified boards.

Author: per1234

Diff for: .github/workflows/compile-examples.yml

@@ -0,0 +1,101 @@
+name: Compile Examples
+
+# See: https://docs.github.com/en/free-pro-team@latest/actions/reference/events-that-trigger-workflows
+on:
+  push:
+    paths:
+      - ".github/workflows/compile-examples.yml"
+      - "examples/**"
+      - "src/**"
+  pull_request:
+    paths:
+      - ".github/workflows/compile-examples.yml"
+      - "examples/**"
+      - "src/**"
+  schedule:
+    # Run every Tuesday at 8 AM UTC to catch breakage caused by changes to external resources (libraries, platforms).
+    - cron: "0 8 * * TUE"
+  workflow_dispatch:
+  repository_dispatch:
+
+jobs:
+  build:
+    name: ${{ matrix.board.fqbn }}
+    runs-on: ubuntu-latest
+
+    strategy:
+      fail-fast: false
+
+      matrix:
+        board:
+          - fqbn: arduino:avr:nano
+            platforms: |
+              - name: arduino:avr
+            softwareserial: true
+          - fqbn: arduino:avr:mega
+            platforms: |
+              - name: arduino:avr
+            softwareserial: true
+          - fqbn: arduino:avr:leonardo
+            platforms: |
+              - name: arduino:avr
+            softwareserial: true
+          - fqbn: arduino:megaavr:nona4809
+            platforms: |
+              - name: arduino:megaavr
+            softwareserial: true
+          - fqbn: arduino:sam:arduino_due_x_dbg
+            platforms: |
+              - name: arduino:sam
+            softwareserial: false
+          - fqbn: arduino:samd:mkrzero
+            platforms: |
+              - name: arduino:samd
+            softwareserial: false
+          - fqbn: arduino:mbed_portenta:envie_m4
+            platforms: |
+              - name: arduino:mbed_portenta
+            softwareserial: false
+          - fqbn: arduino:mbed_portenta:envie_m7
+            platforms: |
+              - name: arduino:mbed_portenta
+            softwareserial: false
+          - fqbn: arduino:mbed_nano:nano33ble
+            platforms: |
+              - name: arduino:mbed_nano
+            softwareserial: false
+          - fqbn: arduino:mbed_nano:nanorp2040connect
+            platforms: |
+              - name: arduino:mbed_nano
+            softwareserial: false
+
+        # Make board type-specific customizations to the matrix jobs
+        include:
+          - board:
+              # Boards with a SoftwareSerial library
+              softwareserial: true
+            # Compile these sketches in addition to the ones defined by env.UNIVERSAL_SKETCH_PATHS
+            sketch-paths: |
+              - examples/Arduino_Debug_Advance
+          - board:
+              softwareserial: false
+            sketch-paths: ""
+
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v2
+
+      - name: Compile examples
+        uses: arduino/compile-sketches@v1
+        with:
+          github-token: ${{ secrets.GITHUB_TOKEN }}
+          fqbn: ${{ matrix.board.fqbn }}
+          platforms: ${{ matrix.board.platforms }}
+          libraries: |
+            # Install the library from the local path.
+            - source-path: ./
+            # Additional library dependencies can be listed here.
+            # See: https://github.com/arduino/compile-sketches#libraries
+          sketch-paths: |
+            - examples/Arduino_Debug_Basic
+            ${{ matrix.sketch-paths }}

Diff for: .travis.yml

@@ -2,6 +2,7 @@ Arduino_DebugUtils
 ==================
 
 [![Check Arduino status](https://github.com/arduino-libraries/Arduino_DebugUtils/actions/workflows/check-arduino.yml/badge.svg)](https://github.com/arduino-libraries/Arduino_DebugUtils/actions/workflows/check-arduino.yml)
+[![Compile Examples status](https://github.com/arduino-libraries/Arduino_DebugUtils/actions/workflows/compile-examples.yml/badge.svg)](https://github.com/arduino-libraries/Arduino_DebugUtils/actions/workflows/compile-examples.yml)
 [![Spell Check status](https://github.com/arduino-libraries/Arduino_DebugUtils/actions/workflows/spell-check.yml/badge.svg)](https://github.com/arduino-libraries/Arduino_DebugUtils/actions/workflows/spell-check.yml)
 
 This class provides functionality useful for debugging sketches via `printf`-style statements.