From a8844843a6751ae77697a731abffc50402cf008e Mon Sep 17 00:00:00 2001
From: Florian Bruhin <me@the-compiler.org>
Date: Tue, 26 Jan 2021 23:30:47 +0100
Subject: ci: Also build/publish 32-bit wheels (#26)

Closes #25
---
 .github/workflows/ci.yml | 48 ++++++++++++++++++++++++++++++++++++++++++++----
 ci/set-target.sh         | 40 ++++++++++++++++++++++++++++++++++++++++
 2 files changed, 84 insertions(+), 4 deletions(-)
 create mode 100755 ci/set-target.sh

diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 61042a8..68e1a10 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -41,8 +41,21 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
+        rust-toolchain: [1.45, nightly]
         python-version: [3.6, 3.7, 3.8, 3.9]
         os: [ubuntu-latest, macos-latest, windows-latest]
+        architecture: [x86, x64]
+        exclude:
+            # Only build 32-bit for Windows
+            - os: macos-latest
+              architecture: x86
+            - os: ubuntu-latest
+              architecture: x86
+            # Only build on Rust 1.45 on Linux
+            - os: macos-latest
+              rust-toolchain: 1.45
+            - os: windows-latest
+              rust-toolchain: 1.45
 
     steps:
       - name: Checkout
@@ -51,22 +64,35 @@ jobs:
       - uses: actions/setup-python@v2
         with:
           python-version: ${{ matrix.python-version }}
+          architecture: ${{ matrix.architecture }}
 
       - name: Install dependencies
         run: |
           python -m pip install --upgrade pip
           pip install poetry
           poetry install
-      - name: Install latest nightly
+
+      - name: Set Rust target environment variable
+        run: bash ci/set-target.sh ${{ matrix.os }} ${{ matrix.architecture }}
+        shell: bash
+
+      - name: Install Rust
         uses: actions-rs/toolchain@v1
         with:
-          toolchain: nightly
+          toolchain: ${{ matrix.rust-toolchain }}
+          target: ${{ env.ACTIONS_RUST_TARGET }}
           override: true
 
       - name: Build Python package
-        run: poetry run maturin develop --release
+        if: matrix.architecture == 'x86'
+        run: poetry run maturin build --target ${{ env.ACTIONS_RUST_TARGET }}
+
+      - name: Build Python package
+        if: matrix.architecture != 'x86'
+        run: poetry run maturin develop
 
       - name: Run Python tests
+        if: matrix.architecture != 'x86'
         run: poetry run pytest -vv --color=yes
 
   python-publish:
@@ -77,17 +103,31 @@ jobs:
       matrix:
         python-version: [3.6, 3.7, 3.8, 3.9]
         os: [ubuntu-latest, macos-latest, windows-latest]
+        architecture: [x86, x64]
+        exclude:
+            # Only build 32-bit for Windows
+            - os: macos-latest
+              architecture: x86
+            - os: ubuntu-latest
+              architecture: x86
+
     steps:
       - uses: actions/checkout@v1
 
       - uses: actions/setup-python@v2
         with:
           python-version: ${{ matrix.python-version }}
+          architecture: ${{ matrix.architecture }}
+
+      - name: Set Rust target environment variable
+        run: bash ci/set-target.sh ${{ matrix.os }} ${{ matrix.architecture }}
+        shell: bash
 
       - name: Install latest nightly
         uses: actions-rs/toolchain@v1
         with:
           toolchain: nightly
+          target: ${{ env.ACTIONS_RUST_TARGET }}
           override: true
 
       - name: Install dependencies
@@ -96,7 +136,7 @@ jobs:
           pip install poetry
           poetry install
       - name: Build Python package
-        run: poetry run maturin build --release --no-sdist --strip --interpreter python${{matrix.python_version}}
+        run: poetry run maturin build --release --no-sdist --strip --interpreter python${{matrix.python_version}} --target ${{ env.ACTIONS_RUST_TARGET }}
 
       - name: List wheels
         if: matrix.os == 'windows-latest'
diff --git a/ci/set-target.sh b/ci/set-target.sh
new file mode 100755
index 0000000..f0dfbf0
--- /dev/null
+++ b/ci/set-target.sh
@@ -0,0 +1,40 @@
+#!/bin/sh
+
+if [ "$#" -ne 2 ]; then
+    echo "Usage: $0 OS ARCHITECTURE" >&2
+    exit 1
+fi
+
+os=$1
+architecture=$2
+
+output() {
+    echo "Setting ACTIONS_RUST_TARGET=$1"
+    echo "ACTIONS_RUST_TARGET=$1" >> "$GITHUB_ENV"
+    exit 0
+}
+
+if [ "$architecture" = "x64" ]; then
+    if [ "$os" = "ubuntu-latest" ]; then
+        output "x86_64-unknown-linux-gnu"
+    elif [ "$os" = "macos-latest" ]; then
+        output "x86_64-apple-darwin"
+    elif [ "$os" = "windows-latest" ]; then
+        output "x86_64-pc-windows-msvc"
+    else
+        echo "Unknown 64-bit OS: $os"
+        exit 1
+    fi
+elif [ "$architecture" = "x86" ]; then
+    if [ "$os" = "ubuntu-latest" ]; then
+        output "i686-unknown-linux-gnu"
+    elif [ "$os" = "windows-latest" ]; then
+        output "i686-pc-windows-msvc"
+    else
+        echo "Unknown 32-bit OS: $os"
+        exit 1
+    fi
+else
+    echo "Bad architecture: $architecture"
+    exit 1
+fi
-- 
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