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juanfranblancojuanfranblanco
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CI: Add cross-platform build workflow
Builds circom-witnesscalc native libraries for all platforms: - Windows x64 (MSVC + protoc + LLVM via choco) - Linux x64 (ubuntu-24.04) - Linux arm64 (ubuntu-24.04-arm) - macOS arm64 (macos-15) - macOS x64 (macos-15-intel) - Android arm64 + x64 (NDK cross-compile) Outputs shared libraries (.dll/.so/.dylib) plus build-circuit and calc-witness CLI tools as build artifacts. Attaches zips to GitHub releases on publish.
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‎.github/workflows/build.yml‎

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name: Build
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on:
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workflow_dispatch:
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release:
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types: [published]
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push:
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branches:
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- main
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- build-all-platforms
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pull_request:
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env:
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CARGO_TERM_COLOR: always
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jobs:
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build-windows-x86_64:
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runs-on: windows-latest
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steps:
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- uses: actions/checkout@v4
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- uses: dtolnay/rust-toolchain@stable
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- name: Install protoc
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run: choco install protoc -y
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- name: Install LLVM
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run: choco install llvm -y
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- name: Cache cargo
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uses: actions/cache@v4
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with:
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path: |
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~/.cargo/registry
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~/.cargo/git
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target
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key: ${{ runner.os }}-cargo-${{ hashFiles('**/Cargo.lock') }}
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- name: Build
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env:
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LIBCLANG_PATH: "C:\\Program Files\\LLVM\\bin"
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run: cargo build --release
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- name: Build build-circuit
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env:
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LIBCLANG_PATH: "C:\\Program Files\\LLVM\\bin"
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run: cargo build --release -p build-circuit
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- name: Collect artifacts
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shell: bash
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run: |
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mkdir -p artifacts/win-x64
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cp target/release/circom_witnesscalc.dll artifacts/win-x64/
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cp target/release/calc-witness.exe artifacts/win-x64/
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cp target/release/build-circuit.exe artifacts/win-x64/
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- name: Upload artifacts
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uses: actions/upload-artifact@v4
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with:
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name: circom-witnesscalc-win-x64
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path: artifacts/win-x64
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if-no-files-found: error
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build-linux-x86_64:
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runs-on: ubuntu-24.04
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steps:
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- uses: actions/checkout@v4
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- uses: dtolnay/rust-toolchain@stable
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- name: Install dependencies
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run: sudo apt-get update && sudo apt-get install -y protobuf-compiler libclang-dev
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- name: Cache cargo
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uses: actions/cache@v4
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with:
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path: |
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~/.cargo/registry
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~/.cargo/git
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target
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key: ${{ runner.os }}-x86_64-cargo-${{ hashFiles('**/Cargo.lock') }}
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- name: Build
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run: cargo build --release
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- name: Build build-circuit
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run: cargo build --release -p build-circuit
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- name: Collect artifacts
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run: |
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mkdir -p artifacts/linux-x64
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cp target/release/libcircom_witnesscalc.so artifacts/linux-x64/
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cp target/release/calc-witness artifacts/linux-x64/
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cp target/release/build-circuit artifacts/linux-x64/
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- name: Upload artifacts
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uses: actions/upload-artifact@v4
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with:
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name: circom-witnesscalc-linux-x64
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path: artifacts/linux-x64
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if-no-files-found: error
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build-linux-arm64:
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runs-on: ubuntu-24.04-arm
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steps:
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- uses: actions/checkout@v4
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- uses: dtolnay/rust-toolchain@stable
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- name: Install dependencies
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run: sudo apt-get update && sudo apt-get install -y protobuf-compiler libclang-dev
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- name: Cache cargo
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uses: actions/cache@v4
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with:
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path: |
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~/.cargo/registry
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~/.cargo/git
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target
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key: ${{ runner.os }}-arm64-cargo-${{ hashFiles('**/Cargo.lock') }}
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- name: Build
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run: cargo build --release
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- name: Collect artifacts
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run: |
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mkdir -p artifacts/linux-arm64
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cp target/release/libcircom_witnesscalc.so artifacts/linux-arm64/
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cp target/release/calc-witness artifacts/linux-arm64/
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- name: Upload artifacts
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uses: actions/upload-artifact@v4
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with:
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name: circom-witnesscalc-linux-arm64
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path: artifacts/linux-arm64
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if-no-files-found: error
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build-macos-arm64:
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runs-on: macos-15
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steps:
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- uses: actions/checkout@v4
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- uses: dtolnay/rust-toolchain@stable
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- name: Install dependencies
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run: brew install protobuf
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- name: Cache cargo
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uses: actions/cache@v4
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with:
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path: |
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~/.cargo/registry
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~/.cargo/git
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target
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key: ${{ runner.os }}-arm64-cargo-${{ hashFiles('**/Cargo.lock') }}
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- name: Build
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run: cargo build --workspace --release
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- name: Collect artifacts
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run: |
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mkdir -p artifacts/osx-arm64
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cp target/release/libcircom_witnesscalc.dylib artifacts/osx-arm64/
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cp target/release/libcircom_witnesscalc.a artifacts/osx-arm64/
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cp target/release/calc-witness artifacts/osx-arm64/
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cp target/release/build-circuit artifacts/osx-arm64/
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install_name_tool -id @rpath/libcircom_witnesscalc.dylib artifacts/osx-arm64/libcircom_witnesscalc.dylib
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- name: Upload artifacts
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uses: actions/upload-artifact@v4
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with:
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name: circom-witnesscalc-osx-arm64
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path: artifacts/osx-arm64
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if-no-files-found: error
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build-macos-x86_64:
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runs-on: macos-15-intel
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steps:
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- uses: actions/checkout@v4
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- uses: dtolnay/rust-toolchain@stable
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- name: Install dependencies
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run: brew install protobuf
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- name: Cache cargo
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uses: actions/cache@v4
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with:
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path: |
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~/.cargo/registry
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~/.cargo/git
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target
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key: ${{ runner.os }}-x86_64-cargo-${{ hashFiles('**/Cargo.lock') }}
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- name: Build
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run: cargo build --release
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- name: Collect artifacts
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run: |
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mkdir -p artifacts/osx-x64
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cp target/release/libcircom_witnesscalc.dylib artifacts/osx-x64/
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cp target/release/calc-witness artifacts/osx-x64/
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install_name_tool -id @rpath/libcircom_witnesscalc.dylib artifacts/osx-x64/libcircom_witnesscalc.dylib
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- name: Upload artifacts
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uses: actions/upload-artifact@v4
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with:
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name: circom-witnesscalc-osx-x64
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path: artifacts/osx-x64
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if-no-files-found: error
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build-android:
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runs-on: ubuntu-24.04
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strategy:
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matrix:
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include:
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- target: aarch64-linux-android
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rid: android-arm64
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- target: x86_64-linux-android
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rid: android-x64
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steps:
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- uses: actions/checkout@v4
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- uses: dtolnay/rust-toolchain@stable
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with:
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targets: ${{ matrix.target }}
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- name: Install dependencies
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run: sudo apt-get update && sudo apt-get install -y protobuf-compiler libclang-dev
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- name: Cache cargo
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uses: actions/cache@v4
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with:
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path: |
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~/.cargo/registry
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~/.cargo/git
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target
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key: ${{ runner.os }}-${{ matrix.target }}-cargo-${{ hashFiles('**/Cargo.lock') }}
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- name: Build
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env:
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ANDROID_NDK_ROOT: ${{ env.ANDROID_NDK_LATEST_HOME }}
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run: |
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export CC="${ANDROID_NDK_ROOT}/toolchains/llvm/prebuilt/linux-x86_64/bin/${{ matrix.target }}34-clang"
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export CARGO_TARGET_$(echo ${{ matrix.target }} | tr '[:lower:]-' '[:upper:]_')_LINKER=$CC
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export CLANG_PATH=$CC
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export RUSTFLAGS="-C link-arg=-Wl,-z,max-page-size=0x4000"
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cargo build --target ${{ matrix.target }} --release
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- name: Collect artifacts
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run: |
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mkdir -p artifacts/${{ matrix.rid }}
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cp target/${{ matrix.target }}/release/libcircom_witnesscalc.so artifacts/${{ matrix.rid }}/
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cp target/${{ matrix.target }}/release/libcircom_witnesscalc.a artifacts/${{ matrix.rid }}/
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- name: Upload artifacts
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uses: actions/upload-artifact@v4
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with:
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name: circom-witnesscalc-${{ matrix.rid }}
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path: artifacts/${{ matrix.rid }}
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if-no-files-found: error
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upload-release:
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if: github.event_name == 'release'
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needs: [build-windows-x86_64, build-linux-x86_64, build-linux-arm64, build-macos-arm64, build-macos-x86_64, build-android]
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runs-on: ubuntu-latest
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steps:
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- name: Download all artifacts
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uses: actions/download-artifact@v4
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with:
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path: all-artifacts
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- name: Create release zips
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run: |
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cd all-artifacts
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for dir in */; do
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name="${dir%/}"
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zip -r "../${name}-${{ github.ref_name }}.zip" "$dir"
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done
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- name: Upload to release
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env:
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GH_TOKEN: ${{ github.token }}
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run: |
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for zip in *.zip; do
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gh release upload ${{ github.event.release.tag_name }} "$zip" -R ${{ github.repository }}
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done

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