Setup GitHub Actions CI (#2018)

And CFS.

.github/workflows/ci-test.yml

@@ -0,0 +1,53 @@
+name: CI Tests
+
+on:
+  push:
+    branches: [ main ]
+  pull_request:
+    branches: [ main ]
+
+jobs:
+  ci:
+    name: pester
+    strategy:
+      matrix:
+        os: [ windows-latest, macos-latest, ubuntu-latest ]
+    runs-on: ${{ matrix.os }}
+    env:
+      DOTNET_NOLOGO: true
+      DOTNET_GENERATE_ASPNET_CERTIFICATE: false
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4
+
+      - name: Install dotnet
+        uses: actions/setup-dotnet@v4
+        with:
+          cache: true
+          cache-dependency-path: '**/*.csproj'
+
+      - name: Install PSResources
+        run: ./tools/installPSResources.ps1
+        shell: pwsh
+
+      - name: Build
+        run: ./build.ps1 -Configuration Release -All
+        shell: pwsh
+
+      - name: Test
+        run: ./build.ps1 -Test
+        shell: pwsh
+
+      - name: Test Windows PowerShell
+        run: |
+           Install-Module Pester -Scope CurrentUser -Force -SkipPublisherCheck
+           ./build.ps1 -Test
+        if: matrix.os == 'windows-latest'
+        shell: powershell
+
+      - name: Upload test results
+        uses: actions/upload-artifact@v4
+        if: always()
+        with:
+          name: PSScriptAnalyzer-tests-${{ matrix.os }}
+          path: testResults.xml

NuGet.Config

@@ -1,7 +1,7 @@
-<?xml version="1.0" encoding="utf-8"?>
+<?xml version="1.0" encoding="utf-8"?>
 <configuration>
   <packageSources>
     <clear />
-    <add key="nuget.org" value="https://api.nuget.org/v3/index.json" />
+    <add key="PowerShellCore_PublicPackages" value="https://pkgs.dev.azure.com/powershell/PowerShell/_packaging/powershell/nuget/v3/index.json" />
   </packageSources>
 </configuration>

build.psm1

@@ -386,7 +386,6 @@ function Test-ScriptAnalyzer
         else {
             $testModulePath = Join-Path "${projectRoot}" -ChildPath out
         }
-        $testResultsFile = "'$(Join-Path ${projectRoot} -childPath TestResults.xml)'"
         $testScripts = "'${projectRoot}\Tests\Build','${projectRoot}\Tests\Engine','${projectRoot}\Tests\Rules','${projectRoot}\Tests\Documentation'"
         try {
             if ( $major -lt 5 ) {
@@ -395,7 +394,7 @@ function Test-ScriptAnalyzer
             $savedModulePath = $env:PSModulePath
             $env:PSModulePath = "${testModulePath}{0}${env:PSModulePath}" -f [System.IO.Path]::PathSeparator
             $analyzerPsd1Path = Join-Path -Path $script:destinationDir -ChildPath "$analyzerName.psd1"
-            $scriptBlock = [scriptblock]::Create("Import-Module '$analyzerPsd1Path'; Invoke-Pester -Path $testScripts")
+            $scriptBlock = [scriptblock]::Create("Import-Module '$analyzerPsd1Path'; Invoke-Pester -Path $testScripts -CI")
             if ( $InProcess ) {
                 & $scriptBlock
             }

tools/installPSResources.ps1

@@ -0,0 +1,13 @@
+# Copyright (c) Microsoft Corporation.
+# Licensed under the MIT License.
+
+$ErrorActionPreference = 'Stop'
+
+Set-PSRepository -Name PSGallery -InstallationPolicy Trusted | Out-Null
+if ($PSVersionTable.PSVersion.Major -lt 6) {
+    throw "The build script requires PowerShell 7!"
+}
+
+# TODO: Switch to Install-PSResource when CI uses PowerShell 7.4
+Install-Module -Name platyPS -Scope CurrentUser
+Install-Module -Name Pester -Scope CurrentUser