Switch to python script for CI VS install that might magically work

* Also for diagnostic purposes, print whether the installer succeeded

Author: baldurk

.github/workflows/ci.yml

@@ -137,10 +137,32 @@ jobs:
     - uses: actions/checkout@v4
       with:
         fetch-depth: 5
-    - name: Install missing VC tools
+
+    - name: Install VSSetup
+      run: Install-Module VSSetup -Scope CurrentUser
+      shell: powershell
+
+    - name: Show installed toolsets
       run: |
-        "C:\Program Files (x86)\Microsoft Visual Studio\Installer\vs_installer.exe" modify --installPath "C:\Program Files\Microsoft Visual Studio\2022\Enterprise" --add Microsoft.VisualStudio.Component.VC.140 --quiet --norestart --nocache
-      shell: cmd
+        echo "--- All:"
+        Get-VSSetupInstance -All
+        echo "--- VC140:"
+        Get-VSSetupInstance -All | Select-VSSetupInstance -Latest -Require Microsoft.VisualStudio.Component.VC.140
+      shell: powershell
+
+    - if: matrix.toolset == 'v140'
+      name: Install missing Visual Studio components
+      run: python .github/workflows/install-vs-components.py
+
+    - if: matrix.toolset == 'v140'
+      name: Show installed toolsets
+      run: |
+        echo "--- All:"
+        Get-VSSetupInstance -All
+        echo "--- VC140:"
+        Get-VSSetupInstance -All | Select-VSSetupInstance -Latest -Require Microsoft.VisualStudio.Component.VC.140
+      shell: powershell
+
     - name: Download optional 3rdparty extras
       run: |
         curl https://renderdoc.org/qrenderdoc_3rdparty.zip -O

.github/workflows/install-vs-components.py

@@ -0,0 +1,44 @@
+# Taken from https://github.com/mhammond/pywin32/blob/main/.github/workflows/install-vs-components.py
+
+# See https://github.com/actions/runner-images/issues/9701
+# Adapted from https://github.com/actions/runner-images/issues/9873#issuecomment-2139288682
+
+import os
+import platform
+from itertools import chain
+from subprocess import check_call, check_output
+
+os.chdir("C:/Program Files (x86)/Microsoft Visual Studio/Installer")
+vs_install_path = check_output(
+    (
+        "vswhere.exe",
+        "-latest",
+        "-products",
+        "*",
+        "-requires",
+        "Microsoft.Component.MSBuild",
+        "-property",
+        "installationPath",
+    ),
+    text=True,
+    shell=True,
+).strip()
+components_to_add = (
+    ["Microsoft.VisualStudio.Component.VC.140"]
+)
+args = (
+    "vs_installer.exe",
+    "modify",
+    "--installPath",
+    vs_install_path,
+    *chain.from_iterable([("--add", component) for component in components_to_add]),
+    "--quiet",
+    "--norestart",
+)
+print(*args)
+
+# Should be run twice for some reason
+print("First run...")
+check_call(args)
+print("Second run...")
+check_call(args)