CI: Build and release on 32bit Windows Python

Author: aiudirog

.github/workflows/build.yml

@@ -66,6 +66,10 @@
                         "win-py-3.7",
                         "win-py-3.6",
                     ],
+                    "arch": [
+                        "x64",
+                        "x86"
+                    ],
                     "include": [
                         {
                             "name": "win-py-3.9",
@@ -94,7 +98,10 @@
                 {
                     "name": "Install the right python",
                     "uses": "actions/setup-python@v2",
-                    "with": { "python-version": "${{ matrix.pyenv }}" },
+                    "with": {
+                        "python-version": "${{ matrix.pyenv }}",
+                        "architecture": "${{ matrix.arch }}"
+                    },
                 },
                 {
                     "name": "Build and test gssapi",

.github/workflows/release.yml

@@ -85,6 +85,10 @@
                         "win-wheel-3.7",
                         "win-wheel-3.6",
                     ],
+                    "arch": [
+                        "x64",
+                        "x86"
+                    ],
                     "include": [
                         {
                             "name": "win-wheel-3.9",
@@ -113,7 +117,10 @@
                 {
                     "name": "Install the right python",
                     "uses": "actions/setup-python@v2",
-                    "with": { "python-version": "${{ matrix.pyenv }}" },
+                    "with": {
+                        "python-version": "${{ matrix.pyenv }}",
+                        "architecture": "${{ matrix.arch }}"
+                    },
                 },
                 {
                     "name": "Create and upload Windows wheel",

ci/lib-setup.sh

@@ -64,6 +64,11 @@ setup::macos::install() {
 setup::windows::install() {
     CHINST="choco install --no-progress --yes --ignore-detected-reboot --allow-downgrade"
 
+    # Install the 32bit version if Python is 32bit
+    if python -c "assert __import__('sys').maxsize <= 2**32"; then
+        CHINST="$CHINST --x86"
+    fi
+
     # Install MIT Kerberos.  choco will fail despite the installation working.
     $CHINST mitkerberos --install-arguments "'ADDLOCAL=ALL'" || true