ci: fix release for arm7l

Installing rust via the rustup shell script isn't supported for arm7l, but we
can install it using the system package manager, apk, which is what this change
does.

Thanks to
https://users.rust-lang.org/t/rustup-installer-for-platform-armv7-unknown-linux-musleabihf-not-found-this-may-be-unsupported/121132/2

.github/workflows/deploy-package-to-pypi.yml

@@ -29,8 +29,8 @@ jobs:
           name: source
           path: ./dist
 
-  build-linux:
-    name: Build Linux wheels
+  build-linux-non-arm7l:
+    name: Build Linux wheels (all but arm7l)
     runs-on: ubuntu-latest
     strategy:
       matrix:
@@ -39,7 +39,6 @@ jobs:
           - "musllinux_1_1_x86_64"
           - "manylinux2014_aarch64"
           - "musllinux_1_1_aarch64"
-          - "musllinux_1_2_armv7l"
         folder:
           - "cp37-cp37m"
           - "cp38-cp38"
@@ -59,7 +58,7 @@ jobs:
       - name: Set up QEMU
         uses: docker/setup-qemu-action@v3
         with:
-          platforms: arm64,arm
+          platforms: arm64
 
       - name: Build packages
         run: >-
@@ -78,6 +77,52 @@ jobs:
           name: linux-${{ matrix.image }}-$${{ matrix.folder }}
           path: ./dist
 
+  build-linux-arm7l:
+    # Installing rust via rustup isn't supported on arm7l: it's a "Tier 2 target without host tools"
+    # But we can install it using the distribution's system package manager, in this case apk
+    name: Build Linux wheels (arm7l)
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        image:
+          - "musllinux_1_2_armv7l"
+        folder:
+          - "cp37-cp37m"
+          - "cp38-cp38"
+          - "cp39-cp39"
+          - "cp310-cp310"
+          - "cp311-cp311"
+          - "cp312-cp312"
+          - "cp313-cp313"
+
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Update version in pyproject.toml from current git tag
+        run: |
+          sed -i "s/0\\.0\\.0\\.dev0/${GITHUB_REF_NAME/v/}/g" pyproject.toml
+
+      - name: Set up QEMU
+        uses: docker/setup-qemu-action@v3
+        with:
+          platforms: arm
+
+      - name: Build packages
+        run: >-
+          docker run --rm -v ${{ github.workspace }}:/app quay.io/pypa/${{ matrix.image }} bash -c '
+            cd /app &&
+            apk add rust &&
+            /opt/python/${{ matrix.folder }}/bin/python -m build --wheel &&
+            auditwheel repair $(ls dist/*.whl) &&
+            rm dist/*.whl &&
+            cp wheelhouse/*.whl dist
+          '
+
+      - uses: actions/upload-artifact@v4
+        with:
+          name: linux-${{ matrix.image }}-$${{ matrix.folder }}
+          path: ./dist
+
   build-macos:
     name: Build macOS wheels
     strategy:
@@ -158,7 +203,8 @@ jobs:
   deploy:
     needs:
       - build-source
-      - build-linux
+      - build-linux-non-arm7l
+      - build-linux-arm7l
       - build-macos
       - build-windows
     environment: