Add manylinux_aarch64 platform (#76)

Co-authored-by: Shantanu <12621235+hauntsaninja@users.noreply.github.com>
Co-authored-by: Shantanu Jain <hauntsaninja@gmail.com>

.github/workflows/build.yml

@@ -39,7 +39,7 @@ jobs:
           )
           echo "include=$MATRIX" | tee -a $GITHUB_OUTPUT
         env:
-          CIBW_ARCHS_LINUX: x86_64
+          CIBW_ARCHS_LINUX: x86_64 aarch64
           CIBW_ARCHS_MACOS: x86_64 arm64
           CIBW_ARCHS_WINDOWS: AMD64
 
@@ -53,6 +53,10 @@ jobs:
         include: ${{ fromJson(needs.generate_wheels_matrix.outputs.include) }}
 
     steps:
+      - uses: docker/setup-qemu-action@v2
+        if: runner.os == 'Linux'
+        with:
+          platforms: arm64
       - uses: actions/checkout@v4
       - name: Checkout mypy
         shell: bash

cibuildwheel.toml

@@ -6,12 +6,13 @@ linux.manylinux-aarch64-image = "manylinux_2_28"
 linux.musllinux-x86_64-image = "musllinux_1_2"
 linux.musllinux-aarch64-image = "musllinux_1_2"
 
-# Don't build 32-bit wheels or PyPy
+# Don't build 32-bit wheels / PyPy / musllinux arm64
 skip = [
   "*-manylinux_i686",
   "*-musllinux_i686",
   "*-win32",
   "pp*",
+  "*-musllinux_aarch64",
 ]
 
 # Python 3.8 can't be tested on macOS arm64
@@ -84,3 +85,17 @@ before-test = [
   "pip install -r {project}/mypy/test-requirements.txt",
 ]
 environment = { MYPYC_OPT_LEVEL="3", MYPYC_DEBUG_LEVEL="0", CC="clang" }
+
+[[tool.cibuildwheel.overrides]]
+select = "*linux_aarch64"
+# Only run testcheck, since the other tests are slow and can be flaky (because of TimeoutError).
+test-command = """ \
+  ( \
+     DIR=$(python -c 'import mypy, os; dn = os.path.dirname; print(dn(dn(mypy.__path__[0])))') \
+     && cp '{project}/mypy/pyproject.toml' '{project}/mypy/conftest.py' $DIR \
+\
+     && MYPY_TEST_DIR=$(python -c 'import mypy.test; print(mypy.test.__path__[0])') \
+\
+     && MYPY_TEST_PREFIX='{project}/mypy' pytest $MYPY_TEST_DIR/testcheck.py \
+   )
+"""