Some refinement to the gh-workflow

.github/workflows/main.yml

@@ -1,53 +1,84 @@
+# Name of the workflow
 name: Build
 
+# Events used by github actions to know when to execute this workflow
 on:
+
   push:
     branches:
       - main
+
   pull_request:
     branches:
       - main
+
   workflow_dispatch:
     inputs:
       type:
         description: 'Meson buildtype (release, debug, etc.)'
         required: false
+        
       test:
         description: 'Run tests (test)'
         required: false
 
 jobs:
   build:
-    runs-on: windows-latest
+    runs-on: 
+      windows-latest
 
     steps:
     - name: Check out repository
       uses: actions/checkout@v2
 
-    - name: Install Meson, Ninja, and Clang with Chocolatey
+
+    - name: Install Meson, Ninja, and Clang with Chocolatey and pip
       shell: pwsh
+
       run: |
         $ErrorActionPreference = "Stop"
+        if (-not (Get-Command choco -ErrorAction SilentlyContinue)) 
+        {
           Set-ExecutionPolicy Bypass -Scope Process -Force
           iex ((New-Object System.Net.WebClient).DownloadString('https://chocolatey.org/install.ps1'))
-        choco install -y python ninja llvm
+        }
+        
+        if (-not (choco list --local-only | Select-String "python")) 
+        {
+          choco install -y python
+        }
+        
+        if (-not (choco list --local-only | Select-String "ninja")) 
+        {
+          choco install -y ninja
+        }
+        
+        if (-not (choco list --local-only | Select-String "llvm")) 
+        {
+          choco install -y llvm
+        }
+        
         python -m pip install meson
 
+
     - name: Run PowerShell build script
+
       shell: pwsh
-      # env:
-        # CC: clang
-        # CXX: clang++
-        # BUILD_TYPE: ${{ github.event.inputs.type }}
-        # RUN_TESTS: ${{ github.event.inputs.test }}
+
+      env:
+        CC: clang
+        CXX: clang++
+        BUILD_TYPE: ${{ github.event.inputs.type }}
+        RUN_TESTS: ${{ github.event.inputs.test }}
+
       run: |
-        # $ErrorActionPreference = "Stop"
+        $ErrorActionPreference = "Stop"
 
-        # $type = $env:BUILD_TYPE
-        # $test = $env:RUN_TESTS
+        $type = $env:BUILD_TYPE
+        $test = $env:RUN_TESTS
 
-        # $args = @()
-        # if (-not [string]::IsNullOrEmpty($type)) { $args += $type }
-        # if (-not [string]::IsNullOrEmpty($test)) { $args += $test }
+        $args = @()
+        if (-not [string]::IsNullOrEmpty($type)) { $args += $type }
+        if (-not [string]::IsNullOrEmpty($test)) { $args += $test }
 
         & .\scripts\build.ps1 debug test