Build minichlink in CI (#148)

* Fix caching

* Create requirements.txt

* Fix PlatformIO build for Wiring examples, use cache properly

* Remove uneeded file

* Add slightly more into PlatformIO ini

* Build minichlink in CI (linux)

* Build minichlink in CI (linux)

* Build minichlink in CI (linux), try 3

* Build minichlink in CI (Windows

* Build minichlink in CI (clean)

* Build minichlink in CI (clean 2)

* Build minichlink in CI (MacOs12)

* Build minichlink in CI (MacOs12)

* Fix archive creation

* Fix archive creation 2

* Build for MacOS 11 too

.github/workflows/minichlink.yml

+name: Build minichlink
+
+on: [push, pull_request]
+#    push:
+#        paths:
+#            - minichlink/**
+#    pull_request:
+#        paths:
+#            - minichlink/**
+jobs:
+  build-minichlink:
+    strategy:
+        fail-fast: false
+        matrix:
+            os: [ubuntu-latest, macos-12, macos-11]
+    runs-on: ${{matrix.os}}
+    steps:
+    - uses: actions/checkout@v3
+    - name: Install Dependencies (Linux)
+      if: ${{ matrix.os == 'ubuntu-latest' }}
+      run: sudo apt-get update && sudo apt-get install -y build-essential make libusb-1.0-0-dev libudev-dev mingw-w64-x86-64-dev gcc-mingw-w64-x86-64
+    # we don't need to brew install libusb on Mac, actually preinstalled on the runner! :)
+    - name: Build (Linux, Mac)
+      run: |
+       cd minichlink
+       make clean
+       make V=1 -j3
+    # we cross-compile the Windows binaries from Linux 
+    - name: Build (for Windows)
+      if: ${{ matrix.os == 'ubuntu-latest' }}
+      run: |
+        cd minichlink
+        OS=Windows_NT make clean
+        OS=Windows_NT make V=1 -j3 minichlink.exe
+
+    - name: "Pack (Linux)"
+      if: ${{ matrix.os == 'ubuntu-latest' }}
+      run: tar czf minichlink.tar.gz -C minichlink minichlink minichlink.so 99-minichlink.rules
+    - name: "Pack (Mac)"
+      if: ${{ matrix.os == 'macos-12' || matrix.os == 'macos-11' }}
+      run: tar czf minichlink.tar.gz -C minichlink minichlink
+    # no packing needed for Windows as it's .exe only
+
+    - name: "Upload minichlink (Linux)"
+      if: ${{ matrix.os == 'ubuntu-latest' }}
+      uses: actions/upload-artifact@v3
+      with:
+        name: minichlink (Linux)
+        path: minichlink.tar.gz
+    - name: "Upload minichlink (MacOs 11)"
+      if: ${{ matrix.os == 'macos-11' }}
+      uses: actions/upload-artifact@v3
+      with:
+        name: minichlink (MacOS 11)
+        path: minichlink.tar.gz  
+    - name: "Upload minichlink (MacOs 12)"
+      if: ${{ matrix.os == 'macos-12' }}
+      uses: actions/upload-artifact@v3
+      with:
+        name: minichlink (MacOS 12)
+        path: minichlink.tar.gz  
+    - name: "Upload minichlink (Windows)"
+      if: ${{ matrix.os == 'ubuntu-latest' }}
+      uses: actions/upload-artifact@v3
+      with:
+        name: minichlink (Windows)
+        path: minichlink/minichlink.exe
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