Add GitHub Actions

.github/workflows/build-esp.yml

@@ -0,0 +1,44 @@
+name: Build ESP Examples
+
+on:
+  push:
+    branches: ["main"]
+  pull_request:
+    branches: ["main"]
+  schedule:
+    # Build on Mondays at 9am PST every week
+    - cron:  '0 17 * * 1'
+
+jobs:
+  build-esp:
+    runs-on: ubuntu-24.04
+    container: espressif/idf:latest
+    strategy:
+      fail-fast: false
+      matrix:
+        example: [esp32-led-blink-sdk, esp32-led-strip-sdk]
+        swift: [swift-DEVELOPMENT-SNAPSHOT-2024-12-04-a]
+
+    steps:
+      - name: Checkout repo
+        uses: actions/checkout@v4
+
+      - name: Install apt dependencies
+        run: apt-get -qq update && apt-get -qq -y install pkg-config
+
+      - name: Install ${{ matrix.swift }}
+        run: |
+          wget -q https://download.swift.org/development/ubuntu2404/${{ matrix.swift }}/${{ matrix.swift }}-ubuntu24.04.tar.gz
+          tar xzf ${{ matrix.swift }}-ubuntu24.04.tar.gz
+          export PATH="$PATH:`pwd`/${{ matrix.swift }}-ubuntu24.04/usr/bin/"
+          echo "PATH=$PATH" >> $GITHUB_ENV
+          swiftc --version
+
+      - name: Build ${{ matrix.example }}
+        run: |
+          cd $IDF_PATH
+          . ./export.sh
+          cd -
+          cd ${{ matrix.example }}
+          idf.py set-target esp32c6
+          idf.py build

.github/workflows/build-pico-sdk.yml

@@ -0,0 +1,65 @@
+name: Build Pico SDK Examples
+
+on:
+  push:
+    branches: ["main"]
+  pull_request:
+    branches: ["main"]
+  schedule:
+    # Build on Mondays at 9am PST every week
+    - cron:  '0 17 * * 1'
+
+jobs:
+  build-pico-sdk:
+    runs-on: ubuntu-22.04
+    container: swiftlang/swift:nightly-main-jammy
+    strategy:
+      fail-fast: false
+      matrix:
+        example:
+          - name: pico-blink-sdk
+            board: pico
+          - name: pico-w-blink-sdk
+            board: pico_w
+
+    steps:
+      - name: Checkout repo
+        uses: actions/checkout@v4
+
+      - name: Install apt dependencies
+        run: apt-get -qq update && apt-get -qq -y install curl ninja-build python3
+
+      - name: Install CMake 3.30.2
+        run: |
+          ARCH=`uname -m`
+          curl -sL https://github.com/Kitware/CMake/releases/download/v3.30.2/cmake-3.30.2-linux-$ARCH.tar.gz -O
+          tar xzf cmake-3.30.2-linux-$ARCH.tar.gz
+          export PATH="`pwd`/cmake-3.30.2-linux-$ARCH/bin:$PATH"
+          echo "PATH=$PATH" >> $GITHUB_ENV
+          cmake --version
+
+      - name: Clone Pico SDK
+        run: |
+          git clone https://github.com/raspberrypi/pico-sdk.git
+          cd pico-sdk
+          git submodule update --init --recursive
+          cd ..
+
+      - name: Download GNU ARM toolchain
+        run: |
+          ARCH=`uname -m`
+          curl -sL https://developer.arm.com/-/media/Files/downloads/gnu/13.3.rel1/binrel/arm-gnu-toolchain-13.3.rel1-$ARCH-arm-none-eabi.tar.xz -O
+          tar xf arm-gnu-toolchain-13.3.rel1-$ARCH-arm-none-eabi.tar.xz
+
+      - name: Set Pico environment variables
+        run: |
+          ARCH=`uname -m`
+          echo "PICO_BOARD=${{ matrix.example.board }}" >> $GITHUB_ENV
+          echo "PICO_SDK_PATH=`pwd`/pico-sdk" >> $GITHUB_ENV
+          echo "PICO_TOOLCHAIN_PATH=`pwd`/arm-gnu-toolchain-13.3.rel1-$ARCH-arm-none-eabi" >> $GITHUB_ENV
+
+      - name: Build ${{ matrix.example.name }}
+        run: |
+          cd ${{ matrix.example.name }}
+          cmake -B build -G Ninja .
+          cmake --build build

.github/workflows/build-zephyr.yml

@@ -0,0 +1,47 @@
+name: Build Zephyr Examples
+
+on:
+  push:
+    branches: ["main"]
+  pull_request:
+    branches: ["main"]
+  schedule:
+    # Build on Mondays at 9am PST every week
+    - cron:  '0 17 * * 1'
+
+jobs:
+  build-zephyr:
+    runs-on: ubuntu-22.04
+
+    strategy:
+      fail-fast: false
+      matrix:
+        example: [nrfx-blink-sdk]
+        swift: [swift-DEVELOPMENT-SNAPSHOT-2024-12-04-a]
+
+    steps:
+      - name: Checkout repo
+        uses: actions/checkout@v4
+
+      - name: Set up Python
+        uses: actions/setup-python@v5
+        with:
+          python-version: 3.11
+
+      - name: Setup Zephyr project
+        uses: zephyrproject-rtos/action-zephyr-setup@v1
+        with:
+          app-path: ${{ matrix.example }}
+          toolchains: arm-zephyr-eabi
+
+      - name: Install ${{ matrix.swift }}
+        run: |
+          wget -q https://download.swift.org/development/ubuntu2404/${{ matrix.swift }}/${{ matrix.swift }}-ubuntu24.04.tar.gz
+          tar xzf ${{ matrix.swift }}-ubuntu24.04.tar.gz
+          export PATH="$PATH:`pwd`/${{ matrix.swift }}-ubuntu24.04/usr/bin/"
+          echo "PATH=$PATH" >> $GITHUB_ENV
+          swiftc --version
+
+      - name: Build ${{ matrix.example }}
+        working-directory: ${{ matrix.example }}
+        run: west build -b nrf52840dk/nrf52840

.github/workflows/lint.yml

@@ -0,0 +1,28 @@
+name: Lint
+
+on:
+  push:
+    branches: ["main"]
+  pull_request:
+    branches: ["main"]
+
+jobs:
+  lint:
+    name: Lint
+    runs-on: ubuntu-latest
+    container: swift:6.0-jammy
+
+    steps:
+      - name: Checkout repo
+        uses: actions/checkout@v4
+
+      - name: Install apt dependencies
+        run: apt-get -qq update && apt-get -qq -y install curl
+
+      - name: Compare against swift-mmio swift-format config
+        run: |
+          curl -sL https://raw.githubusercontent.com/apple/swift-mmio/refs/heads/main/SupportingFiles/Tools/swift-format/.swift-format -o .swift-format-mmio
+          diff .swift-format .swift-format-mmio
+
+      - name: Lint
+        run: swift-format lint --recursive --strict .

.swift-format

@@ -0,0 +1,69 @@
+{
+  "fileScopedDeclarationPrivacy" : {
+    "accessLevel" : "private"
+  },
+  "indentation" : {
+    "spaces" : 2
+  },
+  "indentConditionalCompilationBlocks" : false,
+  "indentSwitchCaseLabels" : false,
+  "lineBreakAroundMultilineExpressionChainComponents" : false,
+  "lineBreakBeforeControlFlowKeywords" : false,
+  "lineBreakBeforeEachArgument" : false,
+  "lineBreakBeforeEachGenericRequirement" : false,
+  "lineLength" : 80,
+  "maximumBlankLines" : 1,
+  "multiElementCollectionTrailingCommas" : true,
+  "noAssignmentInExpressions" : {
+    "allowedFunctions" : [
+      "XCTAssertNoThrow"
+    ]
+  },
+  "prioritizeKeepingFunctionOutputTogether" : false,
+  "respectsExistingLineBreaks" : true,
+  "rules" : {
+    "AllPublicDeclarationsHaveDocumentation" : false,
+    "AlwaysUseLowerCamelCase" : true,
+    "AmbiguousTrailingClosureOverload" : false,
+    "BeginDocumentationCommentWithOneLineSummary" : false,
+    "DoNotUseSemicolons" : true,
+    "DontRepeatTypeInStaticProperties" : true,
+    "FileScopedDeclarationPrivacy" : true,
+    "FullyIndirectEnum" : true,
+    "GroupNumericLiterals" : true,
+    "IdentifiersMustBeASCII" : true,
+    "NeverForceUnwrap" : true,
+    "NeverUseForceTry" : true,
+    "NeverUseImplicitlyUnwrappedOptionals" : true,
+    "NoAccessLevelOnExtensionDeclaration" : true,
+    "NoAssignmentInExpressions" : true,
+    "NoBlockComments" : false,
+    "NoCasesWithOnlyFallthrough" : true,
+    "NoEmptyTrailingClosureParentheses" : true,
+    "NoLabelsInCasePatterns" : true,
+    "NoLeadingUnderscores" : false,
+    "NoParensAroundConditions" : true,
+    "NoPlaygroundLiterals" : true,
+    "NoVoidReturnOnFunctionSignature" : true,
+    "OmitExplicitReturns" : true,
+    "OneCasePerLine" : true,
+    "OneVariableDeclarationPerLine" : true,
+    "OnlyOneTrailingClosureArgument" : true,
+    "OrderedImports" : true,
+    "ReplaceForEachWithForLoop" : true,
+    "ReturnVoidInsteadOfEmptyTuple" : true,
+    "TypeNamesShouldBeCapitalized" : true,
+    "UseEarlyExits" : true,
+    "UseLetInEveryBoundCaseVariable" : true,
+    "UseShorthandTypeNames" : true,
+    "UseSingleLinePropertyGetter" : true,
+    "UseSynthesizedInitializer" : true,
+    "UseTripleSlashForDocumentationComments" : true,
+    "UseWhereClausesInForLoops" : false,
+    "ValidateDocumentationComments" : true
+  },
+  "spacesBeforeEndOfLineComments": 2,
+  "spacesAroundRangeFormationOperators" : false,
+  "tabWidth" : 2,
+  "version" : 1
+}

esp32-led-blink-sdk/main/Led.swift

@@ -23,7 +23,7 @@ struct Led {
       fatalError("cannot reset led")
     }
   }
-  func setLed(value:Bool) {
+  func setLed(value: Bool) {
     let level: UInt32 = value ? 1 : 0
     gpio_set_level(ledPin, level)
   }

esp32-led-blink-sdk/main/Main.swift

@@ -9,18 +9,18 @@
 //
 //===----------------------------------------------------------------------===//
 
-//The code will blink an LED on GPIO8. To change the pin, modify Led(gpioPin: 8)
+// The code will blink an LED on GPIO8. To change the pin, modify Led(gpioPin: 8)
 @_cdecl("app_main")
-func app_main() {
-    print("Hello from Swift on ESP32-C6!")
+func main() {
+  print("Hello from Swift on ESP32-C6!")
 
-    var ledValue: Bool = false
-    let blinkDelayMs: UInt32 = 500
-    let led = Led(gpioPin: 8)
+  var ledValue: Bool = false
+  let blinkDelayMs: UInt32 = 500
+  let led = Led(gpioPin: 8)
 
-    while true {
-        led.setLed(value: ledValue)
-        ledValue.toggle() // Toggle the boolean value
-        vTaskDelay(blinkDelayMs / (1000 / UInt32(configTICK_RATE_HZ)))
-    }
+  while true {
+    led.setLed(value: ledValue)
+    ledValue.toggle()  // Toggle the boolean value
+    vTaskDelay(blinkDelayMs / (1000 / UInt32(configTICK_RATE_HZ)))
+  }
 }

esp32-led-strip-sdk/main/LedStrip.swift

@@ -12,6 +12,7 @@
 // A simple "overlay" to provide nicer APIs in Swift
 struct LedStrip {
   private let handle: led_strip_handle_t
+
   init(gpioPin: Int, maxLeds: Int) {
     var handle = led_strip_handle_t(bitPattern: 0)
     var stripConfig = led_strip_config_t(
@@ -26,24 +27,27 @@ struct LedStrip {
       spi_bus: SPI2_HOST,
       flags: .init(with_dma: 1)
     )
-    guard led_strip_new_spi_device(&stripConfig, &spiConfig, &handle) == ESP_OK else {
-      fatalError("cannot configure spi device")
-    }
-    self.handle = handle!
+    guard led_strip_new_spi_device(&stripConfig, &spiConfig, &handle) == ESP_OK,
+      let handle = handle
+    else { fatalError("cannot configure spi device") }
+    self.handle = handle
   }
 
-  struct Color { 
-    var r, g, b: UInt8
+  struct Color {
     static var white = Color(r: 255, g: 255, b: 255)
     static var lightWhite = Color(r: 16, g: 16, b: 16)
-    static var lightRandom: Color { 
-      Color(r: .random(in: 0...16), g: .random(in: 0...16), b: .random(in: 0...16))
+    static var lightRandom: Color {
+      Color(
+        r: .random(in: 0...16), g: .random(in: 0...16), b: .random(in: 0...16))
     }
     static var off = Color(r: 0, g: 0, b: 0)
+
+    var r, g, b: UInt8
   }
 
   func setPixel(index: Int, color: Color) {
-    led_strip_set_pixel(handle, UInt32(index), UInt32(color.r), UInt32(color.g), UInt32(color.b))
+    led_strip_set_pixel(
+      handle, UInt32(index), UInt32(color.r), UInt32(color.g), UInt32(color.b))
   }
 
   func refresh() { led_strip_refresh(handle) }

esp32-led-strip-sdk/main/Main.swift

@@ -10,7 +10,7 @@
 //===----------------------------------------------------------------------===//
 
 @_cdecl("app_main")
-func app_main() {
+func main() {
   print("Hello from Swift on ESP32-C6!")
 
   let n = 8
@@ -22,11 +22,11 @@ func app_main() {
     colors.removeLast()
     colors.insert(.lightRandom, at: 0)
 
-    for index in 0 ..< n {
+    for index in 0..<n {
       ledStrip.setPixel(index: index, color: colors[index])
     }
     ledStrip.refresh()
-    
+
     let blinkDelayMs: UInt32 = 500
     vTaskDelay(blinkDelayMs / (1000 / UInt32(configTICK_RATE_HZ)))
   }

nrfx-blink-sdk/Main.swift

@@ -14,7 +14,8 @@ struct Main {
   static func main() {
     // Note: & in Swift is not the "address of" operator, but on a global variable declared in C
     // it will give the correct address of the global.
-    gpio_pin_configure_dt(&led0, GPIO_OUTPUT | GPIO_OUTPUT_INIT_HIGH | GPIO_OUTPUT_INIT_LOGICAL)
+    gpio_pin_configure_dt(
+      &led0, GPIO_OUTPUT | GPIO_OUTPUT_INIT_HIGH | GPIO_OUTPUT_INIT_LOGICAL)
     while true {
       gpio_pin_toggle_dt(&led0)
       k_msleep(100)

nrfx-blink-sdk/west.yml

@@ -0,0 +1,13 @@
+manifest:
+  remotes:
+    - name: zephyrproject-rtos
+      url-base: https://github.com/zephyrproject-rtos
+
+  projects:
+    - name: zephyr
+      remote: zephyrproject-rtos
+      revision: main
+      import:
+        name-allowlist:
+          - cmsis      # required by the ARM port
+          - hal_nordic # required by the custom_plank board (Nordic based)

pico-blink-sdk/Main.swift

@@ -14,7 +14,7 @@ struct Main {
   static func main() {
     let led = UInt32(PICO_DEFAULT_LED_PIN)
     gpio_init(led)
-    gpio_set_dir(led, /*out*/true)
+    gpio_set_dir(led, /*out*/ true)
     while true {
       gpio_put(led, true)
       sleep_ms(250)