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Use Swiftly to install Swift (#108)
Updates the various GitHub workflows to use a common "Install Swift" action using swiftly and a .swift-version file at the repo root. This allows us to drop the swift version from each of the workflows and makes it easier for users to reproduec the CI environment. Future: - Add a workflow which auto updates this file. - Update READMEs to suggest install swift using swiftly.
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‎.github/actions/install-swift/action.yml

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name: 'Install Swift'
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description: 'Installs the Swift specified by a .swift-version file'
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runs:
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using: "composite"
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steps:
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- name: Install apt dependencies
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shell: bash
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run: |
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SUDO=$(if [[ $EUID -ne 0 ]]; then echo sudo; fi)
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$SUDO apt-get -qq update
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$SUDO apt-get -qq -y install curl gpg binutils git unzip gnupg2 \
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libc6-dev libcurl4-openssl-dev libedit2 libgcc-13-dev libpython3-dev \
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libstdc++-13-dev libxml2-dev libncurses-dev libz3-dev pkg-config \
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tzdata zlib1g-dev
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env:
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DEBIAN_FRONTEND: noninteractive
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- name: Install Swiftly
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shell: bash
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run: |
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UNAME=$(uname -m)
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export SWIFTLY_HOME_DIR="$HOME/.local/share/swiftly"
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echo "SWIFTLY_HOME_DIR=$SWIFTLY_HOME_DIR" >> $GITHUB_ENV
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echo "SWIFTLY_HOME_DIR=$SWIFTLY_HOME_DIR" >> $HOME/.bashrc
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export SWIFTLY_BIN_DIR="$HOME/.local/share/swiftly/bin"
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echo "SWIFTLY_BIN_DIR=$SWIFTLY_BIN_DIR" >> $GITHUB_ENV
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echo "SWIFTLY_BIN_DIR=$SWIFTLY_BIN_DIR" >> $HOME/.bashrc
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curl -O "https://download.swift.org/swiftly/linux/swiftly-$UNAME.tar.gz"
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tar zxf "swiftly-$UNAME.tar.gz"
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./swiftly init --skip-install --assume-yes --quiet-shell-followup
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echo "PATH=$SWIFTLY_BIN_DIR:$PATH" >> $GITHUB_ENV
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echo "PATH=\$SWIFTLY_BIN_DIR:\$PATH" >> $HOME/.bashrc
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- name: Install Swift
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shell: bash
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run: |
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swiftly install
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swift --version

‎.github/workflows/build-esp.yml

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build-esp:
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runs-on: ubuntu-24.04
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container: espressif/idf:latest
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strategy:
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fail-fast: false
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matrix:
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example: [esp32-led-blink-sdk, esp32-led-strip-sdk]
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swift: [swift-DEVELOPMENT-SNAPSHOT-2024-12-04-a]
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steps:
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- name: Checkout repo
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- name: Install apt dependencies
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run: apt-get -qq update && apt-get -qq -y install pkg-config
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- name: Install ${{ matrix.swift }}
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run: |
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wget -q https://download.swift.org/development/ubuntu2404/${{ matrix.swift }}/${{ matrix.swift }}-ubuntu24.04.tar.gz
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tar xzf ${{ matrix.swift }}-ubuntu24.04.tar.gz
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export PATH="`pwd`/${{ matrix.swift }}-ubuntu24.04/usr/bin/:$PATH"
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echo "PATH=$PATH" >> $GITHUB_ENV
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swiftc --version
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- name: Install Swift
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uses: ./.github/actions/install-swift
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- name: Build ${{ matrix.example }}
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run: |

‎.github/workflows/build-nuttx.yml

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fail-fast: false
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matrix:
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example: [nuttx-riscv-blink]
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swift: [swift-DEVELOPMENT-SNAPSHOT-2024-12-22-a]
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steps:
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- name: Checkout repo
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echo "PATH=$PATH" >> $GITHUB_ENV
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riscv-none-elf-gcc --version
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- name: Install ${{ matrix.swift }}
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run: |
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wget -q https://download.swift.org/development/ubuntu2404/${{ matrix.swift }}/${{ matrix.swift }}-ubuntu24.04.tar.gz
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tar xzf ${{ matrix.swift }}-ubuntu24.04.tar.gz
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export PATH="`pwd`/${{ matrix.swift }}-ubuntu24.04/usr/bin/:$PATH"
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echo "PATH=$PATH" >> $GITHUB_ENV
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swiftc --version
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- name: Config ${{ matrix.example }}
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working-directory: ${{ matrix.example }}
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run: cmake -B build -GNinja -DBOARD_CONFIG=rv-virt:leds_swift -DENABLE_NUTTX_TRACE=ON
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- name: Install Swift
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uses: ./.github/actions/install-swift
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- name: Build ${{ matrix.example }}
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working-directory: ${{ matrix.example }}
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run: cmake --build build
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run: |
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cmake -B build -GNinja -DBOARD_CONFIG=rv-virt:leds_swift -DENABLE_NUTTX_TRACE=ON
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cmake --build build

‎.github/workflows/build-pico-sdk.yml

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jobs:
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build-pico-sdk:
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runs-on: ubuntu-24.04
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strategy:
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fail-fast: false
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matrix:
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board: pico_w
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- name: harmony
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board: pico_w
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swift: [swift-DEVELOPMENT-SNAPSHOT-2024-12-04-a]
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steps:
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- name: Checkout repo
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curl -sL https://developer.arm.com/-/media/Files/downloads/gnu/14.2.rel1/binrel/arm-gnu-toolchain-14.2.rel1-$ARCH-arm-none-eabi.tar.xz -O
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tar xf arm-gnu-toolchain-14.2.rel1-$ARCH-arm-none-eabi.tar.xz
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- name: Install ${{ matrix.swift }}
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run: |
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wget -q https://download.swift.org/development/ubuntu2404/${{ matrix.swift }}/${{ matrix.swift }}-ubuntu24.04.tar.gz
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tar xzf ${{ matrix.swift }}-ubuntu24.04.tar.gz
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export PATH="`pwd`/${{ matrix.swift }}-ubuntu24.04/usr/bin/:$PATH"
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echo "PATH=$PATH" >> $GITHUB_ENV
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which swiftc
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swiftc --version
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- name: Install Swift
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uses: ./.github/actions/install-swift
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- name: Clone Pico SDK
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run: |
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echo "PICO_TOOLCHAIN_PATH=`pwd`/arm-gnu-toolchain-14.2.rel1-$ARCH-arm-none-eabi" >> $GITHUB_ENV
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- name: Build ${{ matrix.example.name }}
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working-directory: ${{ matrix.example.name }}
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run: |
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cd ${{ matrix.example.name }}
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cmake -B build -G Ninja .
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cmake --build build

‎.github/workflows/build-rpi-baremetal.yml

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schedule:
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# Build on Mondays at 9am PST every week
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- cron: '0 17 * * 1'
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jobs:
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build-rpi-baremetal:
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runs-on: ubuntu-24.04
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strategy:
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fail-fast: false
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matrix:
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example: [rpi5-blink, rpi4b-blink]
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swift: [swift-DEVELOPMENT-SNAPSHOT-2024-12-04-a]
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example: [rpi4b-blink, rpi5-blink]
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steps:
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- name: Checkout repo
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- name: Install apt dependencies
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run: sudo apt-get -qq update && sudo apt-get -qq -y install make llvm
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- name: Install ${{ matrix.swift }}
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run: |
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wget -q https://download.swift.org/development/ubuntu2404/${{ matrix.swift }}/${{ matrix.swift }}-ubuntu24.04.tar.gz
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tar xzf ${{ matrix.swift }}-ubuntu24.04.tar.gz
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export PATH="`pwd`/${{ matrix.swift }}-ubuntu24.04/usr/bin/:$PATH"
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echo "PATH=$PATH" >> $GITHUB_ENV
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which swiftc
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swiftc --version
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- name: Install Swift
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uses: ./.github/actions/install-swift
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- name: Build ${{ matrix.example }}
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run: |
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cd ${{ matrix.example }}
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make
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working-directory: ${{ matrix.example }}
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run: make

‎.github/workflows/build-stm.yml

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fail-fast: false
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matrix:
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example: [stm32-blink]
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swift: [swift-DEVELOPMENT-SNAPSHOT-2025-03-04-a]
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- name: Checkout repo
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- name: Install uv
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uses: astral-sh/setup-uv@v5
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- name: Install ${{ matrix.swift }}
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run: |
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wget -q https://download.swift.org/development/ubuntu2404/${{ matrix.swift }}/${{ matrix.swift }}-ubuntu24.04.tar.gz
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tar xzf ${{ matrix.swift }}-ubuntu24.04.tar.gz
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export PATH="`pwd`/${{ matrix.swift }}-ubuntu24.04/usr/bin/:$PATH"
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echo "PATH=$PATH" >> $GITHUB_ENV
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swiftc --version
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- name: Install Swift
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uses: ./.github/actions/install-swift
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- name: Build ${{ matrix.example }}
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working-directory: ${{ matrix.example }}

‎.github/workflows/build-zephyr.yml

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fail-fast: false
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matrix:
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example: [nrfx-blink-sdk]
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swift: [swift-DEVELOPMENT-SNAPSHOT-2024-12-04-a]
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- name: Checkout repo
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app-path: ${{ matrix.example }}
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toolchains: arm-zephyr-eabi
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- name: Install ${{ matrix.swift }}
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run: |
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wget -q https://download.swift.org/development/ubuntu2404/${{ matrix.swift }}/${{ matrix.swift }}-ubuntu24.04.tar.gz
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tar xzf ${{ matrix.swift }}-ubuntu24.04.tar.gz
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export PATH="`pwd`/${{ matrix.swift }}-ubuntu24.04/usr/bin/:$PATH"
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echo "PATH=$PATH" >> $GITHUB_ENV
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swiftc --version
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- name: Install Swift
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uses: ./.github/actions/install-swift
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- name: Build ${{ matrix.example }}
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working-directory: ${{ matrix.example }}

‎.swift-version

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main-snapshot-2025-04-12

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