Use native arm runners for building wheels

.github/workflows/release-artifacts.yml

@@ -107,12 +107,15 @@ jobs:
           path: debs/*
 
   build-wheels:
-    name: Build wheels on ${{ matrix.os }} for ${{ matrix.arch }}
+    name: Build wheels on ${{ matrix.os }}
     runs-on: ${{ matrix.os }}
     strategy:
       matrix:
-        os: [ubuntu-24.04, macos-13]
-        arch: [x86_64, aarch64]
+        os:
+          - ubuntu-24.04
+          - ubuntu-24.04-arm
+          - macos-13 # This uses x86-64
+          - macos-14 # This uses arm64
         # is_pr is a flag used to exclude certain jobs from the matrix on PRs.
         # It is not read by the rest of the workflow.
         is_pr:
@@ -122,12 +125,11 @@ jobs:
           # Don't build macos wheels on PR CI.
           - is_pr: true
             os: "macos-13"
-          # Don't build aarch64 wheels on mac.
-          - os: "macos-13"
-            arch: aarch64
+          - is_pr: true
+            os: "macos-14"
           # Don't build aarch64 wheels on PR CI.
           - is_pr: true
-            arch: aarch64
+            os: "ubuntu-24.04-arm"
 
     steps:
       - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
@@ -141,19 +143,9 @@ jobs:
       - name: Install cibuildwheel
         run: python -m pip install cibuildwheel==3.0.0
 
-      - name: Set up QEMU to emulate aarch64
-        if: matrix.arch == 'aarch64'
-        uses: docker/setup-qemu-action@29109295f81e9208d7d86ff1c6c12d2833863392 # v3.6.0
-        with:
-          platforms: arm64
-
-      - name: Build aarch64 wheels
-        if: matrix.arch == 'aarch64'
-        run: echo 'CIBW_ARCHS_LINUX=aarch64' >> $GITHUB_ENV
-
       - name: Only build a single wheel on PR
         if: startsWith(github.ref, 'refs/pull/')
-        run: echo "CIBW_BUILD="cp39-manylinux_${{ matrix.arch }}"" >> $GITHUB_ENV
+        run: echo "CIBW_BUILD="cp39-manylinux_*"" >> $GITHUB_ENV
 
       - name: Build wheels
         run: python -m cibuildwheel --output-dir wheelhouse
@@ -161,13 +153,10 @@ jobs:
           # Skip testing for platforms which various libraries don't have wheels
           # for, and so need extra build deps.
           CIBW_TEST_SKIP: pp3*-* *i686* *musl*
-          # Fix Rust OOM errors on emulated aarch64: https://github.com/rust-lang/cargo/issues/10583
-          CARGO_NET_GIT_FETCH_WITH_CLI: true
-          CIBW_ENVIRONMENT_PASS_LINUX: CARGO_NET_GIT_FETCH_WITH_CLI
 
       - uses: actions/upload-artifact@ea165f8d65b6e75b540449e92b4886f43607fa02 # v4.6.2
         with:
-          name: Wheel-${{ matrix.os }}-${{ matrix.arch }}
+          name: Wheel-${{ matrix.os }}
           path: ./wheelhouse/*.whl
 
   build-sdist:

pyproject.toml

@@ -382,13 +382,10 @@ build-backend = "poetry.core.masonry.api"
 # Skip unsupported platforms (by us or by Rust).
 # See https://cibuildwheel.readthedocs.io/en/stable/options/#build-skip for the list of build targets.
 # We skip:
-#  - CPython 3.6, 3.7 and 3.8: EOLed
-#  - PyPy 3.7 and 3.8: we only support Python 3.9+
+#  - CPython and PyPy 3.8: EOLed
 #  - musllinux i686: excluded to reduce number of wheels we build.
 #    c.f. https://github.com/matrix-org/synapse/pull/12595#discussion_r963107677
-#  - PyPy on Aarch64 and musllinux on aarch64: too slow to build.
-#    c.f. https://github.com/matrix-org/synapse/pull/14259
-skip = "cp36* cp37* cp38* pp37* pp38* *-musllinux_i686 pp*aarch64 *-musllinux_aarch64"
+skip = "cp38* pp38* *-musllinux_i686"
 # Enable non-default builds.
 # "pypy" used to be included by default up until cibuildwheel 3.
 enable = "pypy"