Improve PowerShell WSL prechecks and CI coverage

Author: lucasbellesi

.github/workflows/cpp-build.yml

@@ -1,11 +1,11 @@
-name: C++ Build Matrix
+name: Repository CI
 
 on:
   push:
   pull_request:
 
 jobs:
-  build-linux:
+  linux-bash:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout
@@ -22,7 +22,10 @@ jobs:
       - name: Compile all C++ files
         run: bash ./scripts/build-all.sh
 
-  build-windows:
+      - name: Verify repository
+        run: bash ./scripts/verify-repo.sh
+
+  windows-powershell:
     runs-on: windows-latest
     steps:
       - name: Checkout
@@ -31,18 +34,29 @@ jobs:
       - name: Setup MSYS2
         uses: msys2/setup-msys2@v2
         with:
-          msystem: MINGW64
+          msystem: UCRT64
           path-type: inherit
           update: true
           install: >-
-            mingw-w64-x86_64-gcc
+            mingw-w64-ucrt-x86_64-gcc
 
-      - name: Check markdown links
-        shell: msys2 {0}
+      - name: Add MinGW to PATH
+        shell: pwsh
         run: |
-          ./scripts/check-links.sh
+          "C:\msys64\ucrt64\bin" | Out-File -FilePath $env:GITHUB_PATH -Encoding utf8 -Append
+
+      - name: Confirm g++ toolchain
+        shell: pwsh
+        run: g++ --version
+
+      - name: Check markdown links
+        shell: pwsh
+        run: powershell -ExecutionPolicy Bypass -File scripts\check-links.ps1
 
       - name: Compile all C++ files
-        shell: msys2 {0}
-        run: |
-          ./scripts/build-all.sh
+        shell: pwsh
+        run: powershell -ExecutionPolicy Bypass -File scripts\build-all.ps1
+
+      - name: Verify repository
+        shell: pwsh
+        run: powershell -ExecutionPolicy Bypass -File scripts\verify-repo.ps1

scripts/build-all.ps1

@@ -18,6 +18,15 @@ function Assert-LastExitCode([string]$action) {
     }
 }
 
+function Assert-WslToolchainReady() {
+    wsl bash -lc "command -v g++ >/dev/null 2>&1"
+    if ($LASTEXITCODE -ne 0) {
+        Write-Host "WSL fallback is not ready: unable to run g++ inside WSL."
+        Write-Host "Install g++ in WSL, fix WSL access, or install native g++ on Windows."
+        exit 1
+    }
+}
+
 $cppFiles = Get-ChildItem -Recurse -Path "languages/cpp" -Filter "*.cpp"
 if ($cppFiles.Count -eq 0) {
     Write-Host "No C++ files found under languages/cpp"
@@ -35,6 +44,7 @@ if (-not $nativeGpp) {
     if ($runningOnWindows -and $wslCommand) {
         $useWsl = $true
         Write-Host "Native g++ not found. Using WSL g++ fallback."
+        Assert-WslToolchainReady
     } else {
         Write-Host "g++ was not found in PATH."
         Write-Host "Install g++ (or use WSL on Windows) and try again."

scripts/run-module.ps1

@@ -22,6 +22,15 @@ function Assert-LastExitCode([string]$action) {
     }
 }
 
+function Assert-WslToolchainReady() {
+    wsl bash -lc "command -v g++ >/dev/null 2>&1"
+    if ($LASTEXITCODE -ne 0) {
+        Write-Host "WSL fallback is not ready: unable to run g++ inside WSL."
+        Write-Host "Install g++ in WSL, fix WSL access, or install native g++ on Windows."
+        exit 1
+    }
+}
+
 $normalized = $ModulePath -replace "\\", "/"
 $fullModulePath = Join-Path $root $normalized
 $runningOnWindows = $env:OS -eq "Windows_NT"
@@ -46,6 +55,8 @@ $useWsl = $false
 if (-not $nativeGpp) {
     if ($runningOnWindows -and $wslCommand) {
         $useWsl = $true
+        Write-Host "Native g++ not found. Using WSL g++ fallback."
+        Assert-WslToolchainReady
     } else {
         Write-Host "g++ was not found in PATH."
         Write-Host "Install g++ (or use WSL on Windows) and try again."