Build python bindings in CI

New CI job to build and run python unit tests. This gh action workflow
builds for MacOS x86 and arm archs. While only running the tests on an
x86 machine.

Author: arminsabouri

.github/workflows/build-python.yml

@@ -0,0 +1,100 @@
+# Copied from [bdk-ffi](https://github.com/bitcoindevkit/bdk-ffi/blob/master/.github/workflows/test-python.yaml)
+name: Build and Test Python
+on: [push, pull_request]
+
+jobs:
+  build-manylinux_2_28-x86_64-wheels:
+    name: "Build and test Manylinux 2.28 x86_64 wheels"
+    runs-on: ubuntu-20.04
+    defaults:
+      run:
+        working-directory: python
+    container:
+      image: quay.io/pypa/manylinux_2_28_x86_64
+      env:
+        PLAT: manylinux_2_28_x86_64
+        PYBIN: "/opt/python/${{ matrix.python_dir }}/bin"
+    strategy:
+      matrix:
+        include:
+          - python: "3.8"
+            python_dir: "cp38-cp38"
+          - python: "3.9"
+            python_dir: "cp39-cp39"
+          - python: "3.10"
+            python_dir: "cp310-cp310"
+          - python: "3.11"
+            python_dir: "cp311-cp311"
+          - python: "3.12"
+            python_dir: "cp312-cp312"
+    steps:
+      - name: "Checkout"
+        uses: actions/checkout@v4
+
+      - name: "Install Rust 1.78.0"
+        uses: actions-rs/toolchain@v1
+        with:
+          toolchain: 1.78.0
+
+      - name: "Install Python"
+        uses: actions/setup-python@v4
+        with:
+          python-version: ${{ matrix.python }}
+
+      - name: "Generate payjoin-ffi.py and binaries"
+        run: PYBIN="/opt/python/${{ matrix.python_dir }}/bin" bash ./scripts/generate_linux.sh
+
+      - name: "Build wheel"
+        # Specifying the plat-name argument is necessary to build a wheel with the correct name,
+        # see issue BDK#350 for more information
+        run: ${PYBIN}/python setup.py bdist_wheel --plat-name $PLAT --verbose
+
+      - name: "Install wheel"
+        run: ${PYBIN}/pip install ./dist/*.whl
+
+      - name: "Run tests"
+        run: ${PYBIN}/python -m unittest --verbose test/payjoin_unit_test.py
+
+  build-macos:
+    name: "Build and test macOS"
+    runs-on: macos-13
+    defaults:
+      run:
+        working-directory: python
+    strategy:
+      matrix:
+        python:
+          - "3.8"
+          - "3.9"
+          - "3.10"
+          - "3.11"
+          - "3.12"
+    steps:
+      - name: "Checkout"
+        uses: actions/checkout@v4
+        with:
+          submodules: true
+
+      - name: "Install Rust 1.78.0"
+        uses: actions-rs/toolchain@v1
+        with:
+          toolchain: 1.78.0
+
+      - name: "Install Python"
+        uses: actions/setup-python@v4
+        with:
+          python-version: ${{ matrix.python }}
+
+      - name: "Generate payjoin-ffi.py and binaries"
+        run: bash ./scripts/generate_macos.sh
+
+      - name: "Build wheel"
+        # Specifying the plat-name argument is necessary to build a wheel with the correct name,
+        # see issue BDK#350 for more information
+        run: python3 setup.py bdist_wheel --plat-name macosx_11_0_x86_64 --verbose
+
+      - name: "Install wheel"
+        run: pip3 install ./dist/*.whl
+
+      - name: "Run tests"
+        run: python3 -m unittest --verbose test/payjoin_unit_test.py

python/.gitignore

@@ -17,3 +17,4 @@ venv
 
 # Auto-generated bindings python file
 src/payjoin/payjoin_ffi.py
+src/payjoin/bitcoin.py

python/scripts/generate_linux.sh

@@ -1,7 +1,7 @@
 #!/usr/bin/env bash
 set -euo pipefail
-python3 --version
-pip install --user -r requirements.txt
+${PYBIN}/python --version
+${PYBIN}/pip install -r requirements.txt -r requirements-dev.txt
 LIBNAME=libpayjoin_ffi.so
 LINUX_TARGET=x86_64-unknown-linux-gnu
 

python/scripts/generate_windows.sh

@@ -6,8 +6,7 @@ LIBNAME=payjoin_ffi.dll
 WINDOWS_TARGET=x86_64-pc-windows-gnu
 echo "Generating payjoin_ffi.py..."
 cd ../
-cargo run --features uniffi --bin uniffi-bindgen generate src/payjoin_ffi.udl --language python --out-dir python/src/payjoin/
-
+cargo run --features uniffi --bin uniffi-bindgen generate --library target/release/$LIBNAME --language python --out-dir python/src/payjoin/
 
 echo "Generating native binaries..."
 rustup target add $WINDOWS_TARGET