Replace CircleCI with GitHub ARM runners (#133)

* Use GitHub Linux ARM runners for build & test

These were newly introduced by GitHub in Q1 2025. We've been using
CircleCI to build Linux ARM wheels, so it is hoped we can get rid of
that.

* Remove CircleCI config

* Update test setup-python GH action to v6

* Include runner arch in cache & artifact keys

Author: smheidrich

.circleci/config.yml

@@ -21,20 +21,33 @@ jobs:
     runs-on: ${{ matrix.os }}
     strategy:
       matrix:
-        os: [ubuntu-22.04, windows-2022, macos-13]
+        os: [ubuntu-22.04, ubuntu-22.04-arm, windows-2022, macos-13]
         cibw-build-prefix: ['*']
         cibw-build-kind: [all]  # for artifact name only
+        # The only reason the Ubuntu ones are split up into CPython/PyPy is to
+        # prevent running out of runner disk space; as of 2025, the number of
+        # non-EOL PyPy releases has dropped enough that it probably wouldnn't
+        # be an issue anymore, but keeping it anyway just in case
         include:
           - os: ubuntu-22.04
             cibw-build-prefix: cp*
             cibw-build-kind: cp
           - os: ubuntu-22.04
             cibw-build-prefix: pp*
             cibw-build-kind: pp
+          - os: ubuntu-22.04-arm
+            cibw-build-prefix: cp*
+            cibw-build-kind: cp
+          - os: ubuntu-22.04-arm
+            cibw-build-prefix: pp*
+            cibw-build-kind: pp
         exclude:
           - os: ubuntu-22.04
             cibw-build-prefix: '*'
             cibw-build-kind: all
+          - os: ubuntu-22.04-arm
+            cibw-build-prefix: '*'
+            cibw-build-kind: all
     steps:
       - uses: actions/checkout@v4
       - name: Restore mtimes of files in repo
@@ -45,18 +58,18 @@ jobs:
           cache-name: cargo-home
         with:
           path: ~/cargo-home-dirs
-          key: ${{ env.cache-name }}-${{ runner.os }}-${{ matrix.cibw-build-prefix }}-v11.0
+          key: ${{ env.cache-name }}-${{ runner.os }}-${{ runner.arch }}-${{ matrix.cibw-build-prefix }}-v11.0
           restore-keys: |
-            ${{ env.cache-name }}-${{ runner.os }}-${{ matrix.cibw-build-prefix }}-v11.
+            ${{ env.cache-name }}-${{ runner.os }}-${{ runner.arch }}-${{ matrix.cibw-build-prefix }}-v11.
       - name: Rust build cache
         uses: actions/cache@v4
         env:
           cache-name: rust-build
         with:
           path: ~/cargo-target-dirs
-          key: ${{ env.cache-name }}-${{ runner.os }}-v11.0-${{ matrix.cibw-build-prefix }}-${{ hashFiles('**/Cargo.toml') }}
+          key: ${{ env.cache-name }}-${{ runner.os }}-${{ runner.arch }}-v11.0-${{ matrix.cibw-build-prefix }}-${{ hashFiles('**/Cargo.toml') }}
           restore-keys: |
-            ${{ env.cache-name }}-${{ runner.os }}-${{ matrix.cibw-build-prefix }}-v11.
+            ${{ env.cache-name }}-${{ runner.os }}-${{ runner.arch }}-${{ matrix.cibw-build-prefix }}-v11.
       - name: Save env vars for cibuildwheel
         run: >
           echo "MAIN_DIR=$PWD" >> "$GITHUB_ENV";
@@ -132,7 +145,7 @@ jobs:
           CIBW_BUILD_VERBOSITY: 1
       - uses: actions/upload-artifact@v4
         with:
-          name: artifact-${{ runner.os }}-${{ matrix.cibw-build-kind }}
+          name: artifact-${{ runner.os }}-${{ runner.arch }}-${{ matrix.cibw-build-kind }}
           path: ./wheelhouse/*.whl
 
   build_sdist:

.github/workflows/build.yml

@@ -18,11 +18,13 @@ jobs:
     strategy:
       matrix:
         python-version: ["3.8"]
-        os: [ubuntu-22.04, windows-2022, macos-13]
+        os: [ubuntu-22.04, ubuntu-22.04-arm, windows-2022, macos-13]
         include:
           # set OS-specific cache paths
           - os: ubuntu-22.04
             path: ~/.cache/pip
+          - os: ubuntu-22.04-arm
+            path: ~/.cache/pip
           - os: windows-2022
             path: ~\AppData\Local\pip\Cache
           - os: macos-13
@@ -31,10 +33,13 @@ jobs:
           - os: ubuntu-22.04
             python-version: "pypy3.9"
             path: ~/.cache/pip
+          - os: ubuntu-22.04-arm
+            python-version: "pypy3.9"
+            path: ~/.cache/pip
     steps:
       - uses: actions/checkout@v4
       - name: Set up Python ${{ matrix.python-version }}
-        uses: actions/setup-python@v4
+        uses: actions/setup-python@v6
         with:
           python-version: ${{ matrix.python-version }}
       - name: Restore Rust/Cargo cache
@@ -46,14 +51,14 @@ jobs:
             ~/.cargo/registry/cache/
             ~/.cargo/git/db/
             target/
-          key: ${{ runner.os }}-rust-v4-${{ hashFiles('**/Cargo.lock') }}
+          key: ${{ runner.os }}-${{ runner.arch }}-rust-v4-${{ hashFiles('**/Cargo.lock') }}
       - name: Restore Python/pip cache
         uses: actions/cache/restore@v4
         with:
           path: ${{ matrix.path }}
-          key: ${{ runner.os }}-python-v3-${{ hashFiles('**/requirements.txt') }}
+          key: ${{ runner.os }}-${{ runner.arch }}-python-v3-${{ hashFiles('**/requirements.txt') }}
           restore-keys: |
-           ${{ runner.os }}-python-v3-
+           ${{ runner.os }}-${{ runner.arch }}-python-v3-
       - name: Install dependencies
         run: |
           python -m pip install --upgrade pip
@@ -77,10 +82,10 @@ jobs:
             ~/.cargo/registry/cache/
             ~/.cargo/git/db/
             target/
-          key: ${{ runner.os }}-rust-v4-${{ hashFiles('**/Cargo.lock') }}
+          key: ${{ runner.os }}-${{ runner.arch }}-rust-v4-${{ hashFiles('**/Cargo.lock') }}
       - name: Save Python/pip cache
         uses: actions/cache/save@v4
         if: always()
         with:
           path: ${{ matrix.path }}
-          key: ${{ runner.os }}-python-v3-${{ hashFiles('**/requirements.txt') }}
+          key: ${{ runner.os }}-${{ runner.arch }}-python-v3-${{ hashFiles('**/requirements.txt') }}