ci(ffi): cross-platform Python wheels + PyPI publishing

.github/workflows/publish-python.yml

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+name: Publish Python (ant-ffi)
+
+# Builds the ant-ffi Python wheel across the platform matrix and publishes to
+# PyPI (or TestPyPI) via Trusted Publishing — no long-lived API token.
+#
+# Each platform reuses the same build script developers run locally, so CI and
+# local builds are the single source of truth:
+#   linux  -> ffi/scripts/build-wheel-manylinux.sh   (manylinux_2_28 in Docker)
+#   macos  -> ffi/scripts/build-wheel-macos.sh        (universal2, lipo+delocate)
+#   windows-> ffi/scripts/build-wheel-windows.ps1     (delvewheel)
+#
+# Wheels are tagged py3-none-<platform>: one per OS/arch, valid for every
+# Python 3 (the bindings are pure ctypes over a bundled native library).
+#
+# ── One-time setup required before the first publish ──
+#   1. Create GitHub environments `pypi` and `testpypi` (Settings > Environments;
+#      optionally add reviewers as a release gate).
+#   2. Register a PyPI/TestPyPI "pending publisher" (Trusted Publishing):
+#        PyPI project: ant-ffi   owner: WithAutonomi   repo: ant-sdk
+#        workflow: publish-python.yml   environment: pypi   (and again for testpypi)
+#   No secrets needed — OIDC via `id-token: write` below.
+#
+# ── How to run ──
+#   • Push a tag `python-v<version>` (e.g. python-v0.0.8) -> builds + publishes to PyPI.
+#   • Or run manually (Actions > Run workflow) with `publish`:
+#       none     -> build the full matrix only (matrix smoke test, no upload)
+#       testpypi -> build + upload to TestPyPI
+#       pypi     -> build + upload to PyPI
+
+on:
+  workflow_dispatch:
+    inputs:
+      publish:
+        description: "Where to publish the built wheels"
+        type: choice
+        options: [none, testpypi, pypi]
+        default: none
+  push:
+    tags:
+      - "python-v*"
+
+permissions:
+  contents: read
+
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref }}
+  cancel-in-progress: false
+
+env:
+  CARGO_TERM_COLOR: always
+
+jobs:
+  build:
+    name: Build wheel (${{ matrix.name }})
+    runs-on: ${{ matrix.os }}
+    strategy:
+      fail-fast: false
+      matrix:
+        include:
+          - name: linux-x86_64
+            os: ubuntu-latest
+            script: bash ffi/scripts/build-wheel-manylinux.sh x86_64
+          - name: linux-aarch64
+            os: ubuntu-24.04-arm          # native arm runner — no QEMU
+            script: bash ffi/scripts/build-wheel-manylinux.sh aarch64
+          - name: macos-universal2
+            os: macos-latest              # arm64 host; lipo adds the x86_64 slice
+            script: bash ffi/scripts/build-wheel-macos.sh
+          - name: windows-amd64
+            os: windows-latest
+            script: pwsh ffi/scripts/build-wheel-windows.ps1
+    steps:
+      - uses: actions/checkout@v4
+
+      # Rust for the native macOS/Windows builds. The Linux jobs install Rust
+      # inside the manylinux container, so the host toolchain there is unused
+      # (harmless).
+      - uses: dtolnay/rust-toolchain@stable
+
+      # ant-core's build touches protobuf on the native build paths; the Linux
+      # container build vendors its own, but installing here is harmless and
+      # covers macOS/Windows.
+      - uses: arduino/setup-protoc@v3
+        with:
+          version: "25.x"
+          repo-token: ${{ secrets.GITHUB_TOKEN }}
+
+      - name: Build wheel
+        run: ${{ matrix.script }}
+
+      - uses: actions/upload-artifact@v4
+        with:
+          name: wheel-${{ matrix.name }}
+          path: ffi/python/wheelhouse/*.whl
+          if-no-files-found: error
+
+  publish:
+    name: Publish
+    needs: build
+    # Publish on a python-v* tag (-> PyPI), or when a manual run asks for it.
+    if: >-
+      startsWith(github.ref, 'refs/tags/python-v') ||
+      (github.event_name == 'workflow_dispatch' && github.event.inputs.publish != 'none')
+    runs-on: ubuntu-latest
+    environment: ${{ (github.event_name == 'workflow_dispatch' && github.event.inputs.publish == 'testpypi') && 'testpypi' || 'pypi' }}
+    permissions:
+      id-token: write   # OIDC token for Trusted Publishing
+    steps:
+      - uses: actions/download-artifact@v4
+        with:
+          path: dist
+          pattern: wheel-*
+          merge-multiple: true
+
+      - name: List wheels to publish
+        run: ls -la dist
+
+      - name: Publish to TestPyPI
+        if: github.event_name == 'workflow_dispatch' && github.event.inputs.publish == 'testpypi'
+        uses: pypa/gh-action-pypi-publish@release/v1
+        with:
+          repository-url: https://test.pypi.org/legacy/
+          packages-dir: dist
+
+      - name: Publish to PyPI
+        if: startsWith(github.ref, 'refs/tags/python-v') || (github.event_name == 'workflow_dispatch' && github.event.inputs.publish == 'pypi')
+        uses: pypa/gh-action-pypi-publish@release/v1
+        with:
+          packages-dir: dist

ffi/scripts/build-wheel-macos.sh

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+#!/usr/bin/env bash
+# Build a universal2 macOS Python wheel for the ant-ffi bindings.
+#
+# Compiles the native lib for both arm64 (Apple Silicon) and x86_64 (Intel),
+# lipo-fuses them into one fat dylib, and packages a single
+# `macosx_11_0_universal2` wheel that installs on both Mac architectures.
+# Deployment target is pinned to 11.0 (arm64's floor) so the tag is honest.
+# `delocate` is the macOS analogue of auditwheel — it verifies the dylib is
+# self-contained and carries both arches.
+#
+# Run on macOS with Xcode CLT + rustup. Output -> ffi/python/wheelhouse/.
+set -euo pipefail
+
+export MACOSX_DEPLOYMENT_TARGET=11.0
+PLAT_TAG="macosx_11_0_universal2"
+
+SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
+FFI_DIR="$(cd "$SCRIPT_DIR/.." && pwd)"
+RUST_DIR="$FFI_DIR/rust"
+PY_PKG="$FFI_DIR/python/ant_ffi"
+
+echo "=== [1/6] add x86_64 target (arm64 is native here) ==="
+rustup target add x86_64-apple-darwin aarch64-apple-darwin >/dev/null
+
+echo "=== [2/6] build both arches (deployment target $MACOSX_DEPLOYMENT_TARGET) ==="
+cd "$RUST_DIR"
+cargo build --release -p ant-ffi --target aarch64-apple-darwin
+cargo build --release -p ant-ffi --target x86_64-apple-darwin
+ARM=target/aarch64-apple-darwin/release/libant_ffi.dylib
+X86=target/x86_64-apple-darwin/release/libant_ffi.dylib
+
+echo "=== [3/6] lipo -> universal2 dylib ==="
+mkdir -p "$PY_PKG"
+lipo -create -output "$PY_PKG/libant_ffi.dylib" "$ARM" "$X86"
+lipo -info "$PY_PKG/libant_ffi.dylib"
+
+echo "=== [4/6] generate bindings (arch-independent) ==="
+# The in-crate bindgen was built for the native (arm64) host by the build above.
+BINDGEN=target/aarch64-apple-darwin/release/uniffi-bindgen
+"$BINDGEN" generate --library "$ARM" --language python --out-dir "$PY_PKG"
+
+echo "=== [5/6] build universal2 wheel ==="
+VENV="$(mktemp -d)/venv"
+python3 -m venv "$VENV"
+# shellcheck disable=SC1091
+source "$VENV/bin/activate"
+pip install -q --upgrade pip setuptools wheel delocate
+cd "$FFI_DIR/python"
+rm -rf build dist ./*.egg-info
+python setup.py -q bdist_wheel --plat-name "$PLAT_TAG"
+
+echo "=== [6/6] delocate: verify self-contained + both arches ==="
+mkdir -p wheelhouse
+delocate-listdeps --all dist/*.whl || true
+delocate-wheel --require-archs x86_64,arm64 -w wheelhouse -v dist/*.whl
+echo "=== done -> $FFI_DIR/python/wheelhouse/ ==="
+ls -la wheelhouse/

ffi/scripts/build-wheel-manylinux.sh

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+#!/usr/bin/env bash
+# Build a manylinux-honest Python wheel for the ant-ffi bindings.
+#
+# Runs on any Linux host with Docker. The native library is compiled INSIDE a
+# manylinux_2_28 container (glibc 2.28, AlmaLinux 8) — never against the host's
+# glibc — so the wheel installs on any distro from ~2019 on (RHEL8, Ubuntu 20.04+,
+# Debian 10+). auditwheel is the authority on the final tag.
+#
+# Usage (from anywhere):  ffi/scripts/build-wheel-manylinux.sh [arch]
+#   arch: x86_64 (default) | aarch64
+# Output wheel lands in ffi/python/wheelhouse/.
+set -euo pipefail
+
+ARCH="${1:-x86_64}"
+IMAGE="quay.io/pypa/manylinux_2_28_${ARCH}"
+
+SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
+FFI_DIR="$(cd "$SCRIPT_DIR/.." && pwd)"
+
+# Persist the cargo cache across runs so only the first build pays the full
+# ant-core compile.
+CARGO_CACHE="${HOME}/.cache/ant-ffi-cargo"
+mkdir -p "$CARGO_CACHE/registry" "$CARGO_CACHE/git"
+
+echo "=== manylinux wheel build: $ARCH via $IMAGE ==="
+# --network host: required when the Docker daemon itself runs inside an
+# unprivileged incus/LXC container. Newer Docker applies the namespaced sysctl
+# net.ipv4.ip_unprivileged_port_start on container init, which the nested
+# container can't write ("permission denied"); host networking skips per-netns
+# sysctls. The build only needs outbound internet (rustup/crates.io/pip/dnf).
+docker run --rm --network host \
+  -v "$FFI_DIR":/io \
+  -v "$CARGO_CACHE/registry":/root/.cargo/registry \
+  -v "$CARGO_CACHE/git":/root/.cargo/git \
+  -e ARCH="$ARCH" \
+  "$IMAGE" bash -euo pipefail -c '
+    echo "--- host glibc floor: $(ldd --version | head -1) ---"
+
+    # Build deps some crypto crates want (ring: perl/clang; aws-lc-sys: cmake/go).
+    dnf install -y -q cmake perl clang golang >/dev/null 2>&1 || \
+      yum install -y -q cmake perl clang golang >/dev/null 2>&1 || true
+
+    # Rust (crate needs 1.82+).
+    export RUSTUP_HOME=/root/.rustup CARGO_HOME=/root/.cargo
+    export PATH="/root/.cargo/bin:$PATH"
+    # Use latest stable: the ant-core graph (alloy 1.8.x) needs rustc >= 1.91.
+    if ! command -v cargo >/dev/null; then
+      curl --proto "=https" --tlsv1.2 -sSf https://sh.rustup.rs | \
+        sh -s -- -y --default-toolchain stable --profile minimal
+    fi
+    rustup update stable >/dev/null 2>&1 || true
+    echo "--- $(cargo --version) ---"
+
+    # 1. Build the native lib + the in-crate uniffi-bindgen.
+    cd /io/rust
+    cargo build --release -p ant-ffi
+    LIB=/io/rust/target/release/libant_ffi.so
+    test -f "$LIB"
+
+    # 2. Generate the pure-Python bindings and bundle the fresh .so.
+    OUT=/io/python/ant_ffi
+    mkdir -p "$OUT"
+    /io/rust/target/release/uniffi-bindgen generate \
+      --library "$LIB" --language python --out-dir "$OUT"
+    cp "$LIB" "$OUT/"
+
+    # 3. Build a platform-tagged wheel (setup.py forces py3-none-<plat>).
+    PY=/opt/python/cp312-cp312/bin/python
+    # setuptools+wheel are needed explicitly: modern CPython does not bundle
+    # setuptools, and we build with --no-isolation (setup.py imports it).
+    "$PY" -m pip install -q --upgrade pip build auditwheel setuptools wheel
+    cd /io/python
+    rm -rf build dist *.egg-info
+    "$PY" -m build --wheel --no-isolation
+
+    # 4. auditwheel: verify glibc floor, bundle external libs, honest retag.
+    echo "=== auditwheel show (pre-repair) ==="
+    "$PY" -m auditwheel show dist/*.whl
+    "$PY" -m auditwheel repair dist/*.whl -w /io/python/wheelhouse/
+    echo "=== auditwheel show (repaired) ==="
+    "$PY" -m auditwheel show /io/python/wheelhouse/*.whl
+    chown -R '"$(id -u)"':'"$(id -g)"' /io/python/wheelhouse /io/python/ant_ffi /io/python/dist 2>/dev/null || true
+  '
+echo "=== done -> $FFI_DIR/python/wheelhouse/ ==="
+ls -la "$FFI_DIR/python/wheelhouse/"

ffi/scripts/build-wheel-windows.ps1

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+#!/usr/bin/env pwsh
+# Build a Windows (win_amd64) Python wheel for the ant-ffi bindings.
+#
+# Compiles ant_ffi.dll natively (x86_64-pc-windows-msvc), generates the
+# bindings, and packages a `win_amd64` wheel. delvewheel is the Windows
+# analogue of auditwheel/delocate — it bundles any non-system DLL the native
+# library needs (e.g. the VC runtime) so the wheel is self-contained.
+#
+# Run on Windows with the MSVC toolchain + rustup. Output -> ffi/python/wheelhouse/.
+$ErrorActionPreference = "Stop"
+
+$FfiDir  = Split-Path -Parent $PSScriptRoot          # scripts/ -> ffi/
+$RustDir = Join-Path $FfiDir "rust"
+$PyDir   = Join-Path $FfiDir "python"
+$PyPkg   = Join-Path $PyDir  "ant_ffi"
+
+Write-Host "=== [1/5] build ant-ffi + bindgen (x86_64-pc-windows-msvc) ==="
+Push-Location $RustDir
+cargo build --release -p ant-ffi
+cargo build --release --bin uniffi-bindgen
+$Dll = Join-Path $RustDir "target\release\ant_ffi.dll"
+if (!(Test-Path $Dll)) { throw "missing native library: $Dll" }
+Pop-Location
+
+Write-Host "=== [2/5] bundle DLL next to the module ==="
+New-Item -ItemType Directory -Force -Path $PyPkg | Out-Null
+Copy-Item $Dll $PyPkg -Force
+
+Write-Host "=== [3/5] generate bindings ==="
+$Bindgen = Join-Path $RustDir "target\release\uniffi-bindgen.exe"
+& $Bindgen generate --library $Dll --language python --out-dir $PyPkg
+if ($LASTEXITCODE -ne 0) { throw "uniffi-bindgen failed" }
+
+Write-Host "=== [4/5] build wheel (setup.py forces py3-none-win_amd64) ==="
+$Venv = Join-Path $env:TEMP "antffi-wheel-venv"
+python -m venv $Venv
+& (Join-Path $Venv "Scripts\python.exe") -m pip install -q --upgrade pip setuptools wheel delvewheel
+$Py = Join-Path $Venv "Scripts\python.exe"
+Push-Location $PyDir
+Remove-Item -Recurse -Force build, dist, *.egg-info -ErrorAction SilentlyContinue
+& $Py setup.py -q bdist_wheel --plat-name win_amd64
+if ($LASTEXITCODE -ne 0) { throw "wheel build failed" }
+
+Write-Host "=== [5/5] delvewheel repair: bundle non-system DLLs ==="
+New-Item -ItemType Directory -Force -Path wheelhouse | Out-Null
+$Whl = (Get-ChildItem dist\*.whl | Select-Object -First 1).FullName
+& $Py -m delvewheel repair $Whl -w wheelhouse -v
+if ($LASTEXITCODE -ne 0) { throw "delvewheel repair failed" }
+Write-Host "=== done -> $PyDir\wheelhouse\ ==="
+Get-ChildItem wheelhouse
+Pop-Location