CI: Add a 32-bit Visual Studio 2019 config

This way, we can continue to test whether 32-bit builds continue to work
with Visual Studio builds. Note that this uses the x64-to-x86 cross compiler.

.gitlab-ci.yml

@@ -654,6 +654,42 @@ vs2019-x64-static:
     paths:
       - _build/meson-logs
 
+vs2019-x86:
+  extends: .only-default
+  stage: build
+  tags:
+    - win32-ps
+  needs: []
+  variables:
+    GIT_SUBMODULE_STRATEGY: recursive
+    GIT_SUBMODULE_DEPTH: 1
+    PYTHONUTF8: "1"
+  script:
+    # FIXME: These should use --wrap-mode=nodownload but the Windows CI machines
+    # aren’t currently set up for that.
+    # FIXME: Use --meson-fatal-warnings once we've enabled c_std=gnu99,c99
+    # for the runner's Meson version.
+    - .gitlab-ci/test-msvc.bat --buildtype debug
+                               --wrap-mode=default
+                               --python.platlibdir=C:\Python37\site-packages
+                               --python.purelibdir=C:\Python37\site-packages
+                               --plat=x64_x86
+  artifacts:
+    reports:
+      junit:
+        - _build/meson-logs/testlog.junit.xml
+        - _build/meson-logs/testlog-*.junit.xml
+    name: "glib-${env:CI_JOB_NAME}-${env:CI_COMMIT_REF_NAME}"
+    when: always
+    expire_in: 1 week
+    paths:
+      - _build/meson-logs
+      - _build/glib/libglib-2.0-0.dll
+      - _build/gio/libgio-2.0-0.dll
+      - _build/gmodule/libgmodule-2.0-0.dll
+      - _build/gthread/libgthread-2.0-0.dll
+      - _build/gobject/libgobject-2.0-0.dll
+
 freebsd-13-x86_64:
   extends: .only-schedules-or-manual
   stage: build

.gitlab-ci/test-msvc.bat

@@ -8,7 +8,7 @@ set stash_plat=0
 for %%x in (%*) do (
   if "%%x" == "--plat" set stash_plat=1
   if "!stash_plat!" == "0" set args=!args! %%~x
-  if "!stash_plat!" == "1" if /i not "%%x" == "--plat" set plat=%%x & set stash_plat=0
+  if "!stash_plat!" == "1" if /i not "%%x" == "--plat" (set plat=%%x) & (set stash_plat=0)
 )
 set args=%args:~1%
 if "!plat!" == "" set plat=x64