Updated dobuild.ps1

.vsts-ci/azure-pipelines-ci.yml

@@ -9,22 +9,33 @@ pr:
   branches:
     include:
     - master
-
-resources:
-  repositories:
-  - repository: ComplianceRepo
-    type: github
-    endpoint: ComplianceGHRepo
-    name: PowerShell/compliance
+    - feature-*
+  paths:
+    exclude:
+      - /.dependabot/*
+      - /.poshchan/*
+      - /.github/**/*
+      - /.vscode/**/*
+      - /.vsts-ci/misc-analysis.yml
+      - /tools/**/*
+      - .editorconfig
+      - .gitattributes
+      - .gitignore
+      - /docs/**/*
+      - /CHANGELOG.md
+      - /CONTRIBUTING.md
+      - /README.md
+      - /LICENSE.txt
+      - /CODE_OF_CONDUCT.md
 
 stages:
 - stage: Build
-  displayName: Build PSDesiredStateConfiguration module
+  displayName: Build PowerShell Package
   jobs:
   - job: BuildPkg
     displayName: Build Package
     pool:
-      vmImage: windows-latest
+      vmImage: windows-2019
     steps:
     - template: templates/ci-build.yml
     - pwsh: |
@@ -35,4 +46,33 @@ stages:
     - pwsh: |
         $(Build.SourcesDirectory)/build.ps1 -Publish -Signed
       displayName: Publish
-      timeoutInMinutes: 10
+      timeoutInMinutes: 10
+
+- stage: Test
+  displayName: Test Package
+  jobs:
+  - template: templates/ci-test.yml
+    parameters:
+      jobName: TestPkgWin
+      displayName: PowerShell Core on Windows
+      imageName: windows-2019
+
+  # Not supported on Windows PowerShell per PSD1
+  # - template: test.yml
+  #   parameters:
+  #     jobName: TestPkgWinPS
+  #     displayName: Windows PowerShell on Windows
+  #     imageName: windows-2019
+  #     powershellExecutable: powershell
+
+  - template: templates/ci-test.yml
+    parameters:
+      jobName: TestPkgUbuntu16
+      displayName: PowerShell Core on Ubuntu 16.04
+      imageName: ubuntu-16.04
+
+  - template: templates/ci-test.yml
+    parameters:
+      jobName: TestPkgWinMacOS
+      displayName: PowerShell Core on macOS
+      imageName: macOS-10.14

.vsts-ci/azure-pipelines-release.yml

@@ -1,24 +1,36 @@
 name: $(BuildDefinitionName)_$(date:yyMM).$(date:dd)$(rev:rrr)
 
-trigger: none
-
-resources:
-  repositories:
-  - repository: ComplianceRepo
-    type: github
-    endpoint: ComplianceGHRepo
-    name: PowerShell/compliance
+trigger:
+  batch: true
+  branches:
+    include:
+      - master
+  paths:
+    exclude:
+      - /.dependabot/*
+      - /.poshchan/*
+      - /.github/**/*
+      - /.vscode/**/*
+      - /.vsts-ci/misc-analysis.yml
+      - /tools/**/*
+      - .editorconfig
+      - .gitattributes
+      - .gitignore
+      - /docs/**/*
+      - /CHANGELOG.md
+      - /CONTRIBUTING.md
+      - /README.md
+      - /LICENSE.txt
+      - /CODE_OF_CONDUCT.md
 
 stages:
 - stage: Build
-  displayName: Build PSDesiredStateConfiguration module
-  pool:
-      name: Package ES CodeHub Lab E
+  displayName: Build PowerShell Package
   jobs:
   - job: BuildPkg
     displayName: Build Package
-    variables:
-    - group: ESRP
+    pool:
+      name: 'Package ES CodeHub Lab E'
     steps:
     - powershell: |
         $powerShellPath = Join-Path -Path $env:AGENT_TEMPDIRECTORY -ChildPath 'powershell'
@@ -29,158 +41,110 @@ stages:
         Write-Host "##$vstsCommandString"
       displayName: Install PowerShell Core
 
-    - task: NuGetToolInstaller@1
-      displayName: 'Install NuGet 5.9.1'
+    - task: PkgESSetupBuild@10
+      displayName: 'Package ES - Setup Build'
       inputs:
-        checkLatest: false
-        version: 5.9.1
+        productName: PSDesiredStateConfiguration
 
-    - pwsh: |
+    - template: templates/shouldsign.yml
+
+    - powershell: |
         Get-ChildItem -Path env:
-      displayName: Capture environment for build
+      displayName: Capture environment
       condition: succeededOrFailed()
 
-    - pwsh: |
-        $modulePath = Join-Path -Path $env:AGENT_TEMPDIRECTORY -ChildPath 'TempModules'
-        if (Test-Path -Path $modulePath) {
-          Write-Verbose -Verbose "Deleting existing temp module path: $modulePath"
-          Remove-Item -Path $modulePath -Recurse -Force -ErrorAction Ignore
-        }
-        if (! (Test-Path -Path $modulePath)) {
-          Write-Verbose -Verbose "Creating new temp module path: $modulePath"
-          $null = New-Item -Path $modulePath -ItemType Directory
-        }
-      displayName: Create temporary module path
+    - template: templates/ci-build.yml
+
+    - powershell: |
+        Write-Verbose "BUILD_OUTPUT_PATH- $env:BUILD_OUTPUT_PATH" -Verbose
+        Write-Verbose "SIGNED_OUTPUT_PATH- $env:SIGNED_OUTPUT_PATH" -Verbose
+        Copy-Item $env:BUILD_OUTPUT_PATH $env:SIGNED_OUTPUT_PATH -Recurse -Force
+      displayName: Copy unsigned files first
+
+    - task: PkgESCodeSign@10
+      displayName: 'CodeSign tools/releaseBuild/signing.xml'
+      env:
+        SYSTEM_ACCESSTOKEN: $(System.AccessToken)
+      inputs:
+        signConfigXml: tools/releaseBuild/signing.xml
+        inPathRoot: '$(BUILD_OUTPUT_PATH)'
+        outPathRoot: '$(SIGNED_OUTPUT_PATH)'
+      condition: and(succeeded(), eq(variables['SHOULD_SIGN'], 'true'))
+
+    - task: PowerShell@1
+      displayName: 'Create catalog file'
+      inputs:
+        scriptType: inlineScript
+        inlineScript: |
+          $signedDir = "$env:SIGNED_OUTPUT_PATH\PSDesiredStateConfiguration"
+          New-FileCatalog -CatalogFilePath "$env:SIGNED_OUTPUT_PATH\PSDesiredStateConfiguration\PSDesiredStateConfiguration.cat" -Path "$signedDir"
+
+    - task: PkgESCodeSign@10
+      displayName: 'CodeSign tools/releaseBuild/FileCatalogSigning.xml'
+      env:
+        SYSTEM_ACCESSTOKEN: $(System.AccessToken)
+      inputs:
+        signConfigXml: tools/releaseBuild/FileCatalogSigning.xml
+        inPathRoot: '$(SIGNED_OUTPUT_PATH)'
+        outPathRoot: '$(SIGNED_OUTPUT_PATH)'
+      condition: and(succeeded(), eq(variables['SHOULD_SIGN'], 'true'))
+
+    - task: ms.vss-governance-buildtask.governance-build-task-component-detection.ComponentGovernanceComponentDetection@0
+      displayName: 'Component Detection'
+
+    - task: AntiMalware@3
+      inputs:
+        InputType: 'Basic'
+        ScanType: 'CustomScan'
+        FileDirPath: '$(SIGNED_OUTPUT_PATH)'
+        EnableServices: false
+        SupportLogOnError: false
+        TreatSignatureUpdateFailureAs: 'Warning'
+        SignatureFreshness: 'UpToDate'
+        TreatStaleSignatureAs: 'Error'
+
+    - task: PoliCheck@1
+      condition: succeededOrFailed()
+      inputs:
+        targetType: F
+        optionsFC: 0
+        optionsXS: 0
+        optionsPE: '1|2|3|4'
+        optionsHMENABLE: 0
+        optionsFTPATH: '$(Build.SourcesDirectory)\tools\terms\FileTypeSet.xml'
+
+    - task: CredScan@2
+      condition: succeededOrFailed()
+
+    # Publish results as artifacts
+    - task: PublishSecurityAnalysisLogs@3
+      condition: succeededOrFailed()
+      inputs:
+        ArtifactName: 'CodeAnalysisLogs'
+        ArtifactType: 'Container'
+
+    # Publish to TSA server
+    # - task: TSAUpload@1
+    #   condition: succeededOrFailed()
+    #   continueOnError: true
+    #   inputs:
+    #     tsaVersion: 'TsaV2'
+    #     codebase: 'Existing'
+    #     tsaEnvironment: 'PROD'
+    #     codeBaseName: 'PSDesiredStateConfiguration_20190828'
+    #     uploadAPIScan: false
+    #     uploadBinSkim: false
+    #     uploadCredScan: true
+    #     uploadFortifySCA: false
+    #     uploadFxCop: false
+    #     uploadModernCop: false
+    #     uploadPoliCheck: true
+    #     uploadPREfast: false
+    #     uploadRoslyn: false
+    #     uploadTSLint: false
+    #     uploadAsync: true
 
     - pwsh: |
-        $modulePath = Join-Path -Path $env:AGENT_TEMPDIRECTORY -ChildPath 'TempModules'
-        Write-Verbose -Verbose "Install PowerShellGet V3 to temp module path"
-        Save-Module -Name PowerShellGet -Path $modulePath -MinimumVersion 3.0.0-beta10 -AllowPrerelease -Force
-        Write-Verbose -Verbose "Install PlatyPS to temp module path"
-        Save-Module -Name "platyPS" -Path $modulePath -Force
-        Write-Verbose -Verbose "Install PSScriptAnalyzer to temp module path"
-        Save-Module -Name "PSScriptAnalyzer" -Path $modulePath -RequiredVersion 1.18.0 -Force
-        Write-Verbose -Verbose "Install Pester 4.X to temp module path"
-        Save-Module -Name "Pester" -MaximumVersion 4.99 -Path $modulePath -Force
-        Write-Verbose -Verbose "Install PSPackageProject to temp module path"
-        Save-Module -Name PSPackageProject -Path $modulePath -Force
-      displayName: Install PSPackageProject and dependencies
-
-    - pwsh: |
-        $modulePath = Join-Path -Path $env:AGENT_TEMPDIRECTORY -ChildPath 'TempModules'
-        $env:PSModulePath = $modulePath + [System.IO.Path]::PathSeparator + $env:PSModulePath
-        $modPath = Join-Path -Path $modulePath -ChildPath PSPackageProject
-        Write-Verbose -Verbose "Importing PSPackageProject from: $modPath"
-        Import-Module -Name $modPath -Force
-        #
-        $(Build.SourcesDirectory)/build.ps1 -Build -Clean
-      displayName: Execute build
-
-    - pwsh: |
-        $signSrcPath = "$(Build.SourcesDirectory)\out\PSDesiredStateConfiguration"
-        # Set signing src path variable
-        $vstsCommandString = "vso[task.setvariable variable=signSrcPath]${signSrcPath}"
-        Write-Host "sending " + $vstsCommandString
-        Write-Host "##$vstsCommandString"
-        $signOutPath = "$(Build.SourcesDirectory)\signed\PSDesiredStateConfiguration"
-        $null = New-Item -ItemType Directory -Path $signOutPath
-        # Set signing out path variable
-        $vstsCommandString = "vso[task.setvariable variable=signOutPath]${signOutPath}"
-        Write-Host "sending " + $vstsCommandString
-        Write-Host "##$vstsCommandString"
-        # Set path variable for guardian codesign validation
-        $vstsCommandString = "vso[task.setvariable variable=GDN_CODESIGN_TARGETDIRECTORY]${signOutPath}"
-        Write-Host "sending " + $vstsCommandString
-        Write-Host "##$vstsCommandString"
-      displayName: Setup variables for signing
-
-    - template: EsrpSign.yml@ComplianceRepo
-      parameters:
-        # the folder which contains the binaries to sign
-        buildOutputPath: $(signSrcPath)
-        # the location to put the signed output
-        signOutputPath: $(signOutPath)
-        # the certificate ID to use
-        certificateId: "CP-230012"
-        # the file pattern to use, comma separated
-        pattern: '*.psm1,*.psd1'
-
-    - pwsh: |
-        $repoName = [guid]::newGuid().ToString("N")
-        $packageRoot = "$(Build.SourcesDirectory)\signed\PSDesiredStateConfiguration"
-        Register-PSRepository -Name $repoName -SourceLocation $packageRoot -InstallationPolicy Trusted
-        Publish-Module -Path $packageRoot -Repository $repoName
-        Unregister-PSRepository -Name $repoName
-        Get-ChildItem -Recurse -Path $packageRoot | Write-Verbose -Verbose
-        $nupkgPath = (Get-ChildItem -Recurse -Path $packageRoot -Filter "PSDesiredStateConfiguration*.nupkg" | select -First 1).FullName
-        Write-Host "##vso[artifact.upload containerfolder=nupkg;artifactname=nupkg]$nupkgPath"
-      displayName: Package and publish nupkg
-      name: ProduceNupkg
-
-    - publish: "$(signSrcPath)"
-      artifact: Build
-      displayName: Publish build
-
-    - publish: "$(signOutPath)"
-      artifact: SignedBuild
-      displayName: Publish signed build
-
-- stage: Compliance
-  displayName: Compliance
-  dependsOn: Build
-  jobs:
-  - job: Compliance_Job
-    pool:
-      name: Package ES CodeHub Lab E
-    steps:
-    - checkout: self
-    - checkout: ComplianceRepo
-    - download: current
-      artifact: SignedBuild
-
-    - pwsh: |
-        Get-ChildItem -Path "$(Pipeline.Workspace)\SignedBuild" -Recurse
-      displayName: Capture downloaded artifacts
-    - template: script-module-compliance.yml@ComplianceRepo
-      parameters:
-        # component-governance
-        sourceScanPath: '$(Pipeline.Workspace)\SignedBuild'
-        # credscan
-        suppressionsFile: ''
-        # TermCheck
-        optionsRulesDBPath: ''
-        optionsFTPath: ''
-        # tsa-upload
-        codeBaseName: 'PSDesiredStateConfiguration_20210423'
-        # selections
-        APIScan: false # set to false when not using Windows APIs.
-
-- stage: Deploy
-  displayName: Publish to PowerShell gallery
-  dependsOn: 
-  - Build
-  - Compliance
-  jobs:
-  - deployment: DeployPowerShellGallery
-    displayName: Deploy nupkg to PowerShell Gallery
-    pool:
-      vmImage: windows-latest
-    environment: 'PSDesiredStateConfiguration-ReleaseApproval'
-    strategy:
-      runOnce:
-        deploy:
-          steps:
-          - download: current
-            artifact: 'nupkg'
-          - task: NuGetToolInstaller@1
-            displayName: 'Install NuGet 5.9.1'
-            inputs:
-              checkLatest: false
-              version: 5.9.1
-          - task: NuGetCommand@2
-            displayName: 'NuGet push'
-            inputs:
-              command: push
-              packagesToPush: '$(Pipeline.Workspace)\nupkg\PSDesiredStateConfiguration.*.nupkg'
-              nuGetFeedType: external
-              publishFeedCredentials: 'PowerShellGallery'
+        $(Build.SourcesDirectory)/build.ps1 -Publish -Signed
+      displayName: Publish
+      timeoutInMinutes: 10

azure-pipelines.yml

@@ -0,0 +1,19 @@
+# Starter pipeline
+# Start with a minimal pipeline that you can customize to build and deploy your code.
+# Add steps that build, run tests, deploy, and more:
+# https://aka.ms/yaml
+
+trigger:
+- master
+
+pool:
+  vmImage: 'ubuntu-latest'
+
+steps:
+- script: echo Hello, world!
+  displayName: 'Run a one-line script'
+
+- script: |
+    echo Add other tasks to build, test, and deploy your project.
+    echo See https://aka.ms/yaml
+  displayName: 'Run a multi-line script'

dobuild.ps1

@@ -13,34 +13,38 @@ Implement build and packaging of the package and place the output $OutDirectory/
 function DoBuild
 {
     Write-Verbose -Verbose -Message "Starting DoBuild"
-
+    
     Write-Verbose -Verbose -Message "Copying module files to '${OutDirectory}/${ModuleName}'"
     # copy psm1 and psd1 files
     copy-item "${SrcPath}/*" "${OutDirectory}/${ModuleName}" -Recurse
-    #
 
     # copy help
-    Write-Verbose -Verbose -Message "Copying help files to '${OutDirectory}/${ModuleName}'"
-    copy-item -Recurse "${HelpPath}/${Culture}" "${OutDirectory}/${ModuleName}"
+    # Write-Verbose -Verbose -Message "Copying help files to '${OutDirectory}/${ModuleName}'"
+    # copy-item -Recurse "${HelpPath}/${Culture}" "${OutDirectory}/${ModuleName}"
 
-    if ( Test-Path "${SrcPath}/code" ) {
+    $subsystemCodePath = Resolve-Path "${SrcPath}\..\DscSubsystem"
+    $subsystemBinPath = "bin/Debug/net6.0/publish/Microsoft.PowerShell.DscSubsystem.dll"
+    Write-Verbose -Verbose -Message "Subsystem code path ${subsystemCodePath}"
+
+    if ( Test-Path $subsystemCodePath )
+    {
         Write-Verbose -Verbose -Message "Building assembly and copying to '${OutDirectory}/${ModuleName}'"
-        # build code and place it in the staging location
-        try {
-            Push-Location "${SrcPath}/code"
-            $result = dotnet publish
-            copy-item "bin/Debug/netstandard2.0/publish/${ModuleName}.dll" "${OutDirectory}/${ModuleName}"
+        
+        Push-Location $subsystemCodePath
+        $result = dotnet publish
+        if (Test-Path $subsystemBinPath)
+        {
+            Copy-Item $subsystemBinPath "${OutDirectory}/${ModuleName}"
         }
-        catch {
-            $result | ForEach-Object { Write-Warning $_ }
-            Write-Error "dotnet build failed"
-        }
-        finally {
-            Pop-Location
+        else
+        {
+            Write-Error "dotnet build failed - $subsystemBinPath not found - $result"
         }
+
+        Pop-Location
     }
     else {
-        Write-Verbose -Verbose -Message "No code to build in '${SrcPath}/code'"
+        Write-Verbose -Verbose -Message "No code to build in '$subsystemCodePath'"
     }
 
     ## Add build and packaging here

src/DscSubsystem/CrossPlatformDsc.cs

@@ -0,0 +1,89 @@
+// Copyright (c) Microsoft Corporation.
+// Licensed under the MIT License.
+
+#nullable enable
+
+using System;
+using System.Collections.ObjectModel;
+using System.Collections.Generic;
+using System.Management.Automation;
+using System.Management.Automation.Internal;
+using System.Management.Automation.Language;
+
+namespace System.Management.Automation.Subsystem.DSC
+{
+    /// <summary>
+    /// Interface for implementing a cross platform desired state configuration component.
+    /// </summary>
+    public class CrossPlatformDsc : ICrossPlatformDsc, IModuleAssemblyInitializer
+    {
+        /// <summary>
+        /// Gets the unique identifier for a subsystem implementation.
+        /// </summary>
+        public Guid Id { get {return Guid.NewGuid();} }
+
+        /// <summary>
+        /// Gets the name of a subsystem implementation.
+        /// </summary>
+        public string Name { get {return "Cross platform desired state configuration";} }
+
+        /// <summary>
+        /// Gets the description of a subsystem implementation.
+        /// </summary>
+        public string Description { get {return "Cross platform desired state configuration";} }
+
+        /// <summary>
+        /// Gets a dictionary that contains the functions to be defined at the global scope of a PowerShell session.
+        /// Key: function name; Value: function script.
+        /// </summary>
+        Dictionary<string, string>? ISubsystem.FunctionsToDefine => null;
+
+        /// <summary>
+        /// Test.
+        /// </summary>
+        public void LoadDefaultKeywords(Collection<Exception> errors)
+        {
+            Microsoft.PowerShell.DesiredStateConfiguration.Internal.CrossPlatform.DscClassCache.LoadDefaultCimKeywords(errors);
+        }
+
+        /// <summary>
+        /// Default summary.
+        /// </summary>
+        public void ClearCache()
+        {
+            Microsoft.PowerShell.DesiredStateConfiguration.Internal.CrossPlatform.DscClassCache.ClearCache();
+        }
+
+        /// <summary>
+        /// Default summary.
+        /// </summary>
+        public string GetDSCResourceUsageString(DynamicKeyword keyword)
+        {
+            return Microsoft.PowerShell.DesiredStateConfiguration.Internal.CrossPlatform.DscClassCache.GetDSCResourceUsageString(keyword);
+        }
+
+        /// <summary>
+        /// Checks if a string is one of dynamic keywords that can be used in both configuration and meta configuration.
+        /// </summary>
+        public bool IsSystemResourceName(string name)
+        {
+            return Microsoft.PowerShell.DesiredStateConfiguration.Internal.CrossPlatform.DscClassCache.SystemResourceNames.Contains(name);
+        }
+
+        /// <summary>
+        /// Checks if a string matches default module name used for meta configuration resources.
+        /// </summary>
+        public bool IsDefaultModuleNameForMetaConfigResource(string name)
+        {
+            return name.Equals(Microsoft.PowerShell.DesiredStateConfiguration.Internal.CrossPlatform.DscClassCache.DefaultModuleInfoForMetaConfigResource.Item1, StringComparison.OrdinalIgnoreCase);
+        }
+
+        public void OnImport()
+        {
+            if (SubsystemManager.GetSubsystem<ICrossPlatformDsc>() == null)
+            {
+                SubsystemManager.RegisterSubsystem(SubsystemKind.CrossPlatformDsc, this);
+            }
+        }
+    }
+}

src/DscSubsystem/JsonCimDSCParser.cs

@@ -0,0 +1,68 @@
+// Copyright (c) Microsoft Corporation.
+// Licensed under the MIT License.
+
+using System;
+using System.Collections;
+using System.Collections.Generic;
+using System.Diagnostics.CodeAnalysis;
+using System.Globalization;
+using System.IO;
+using System.Management.Automation;
+using System.Security;
+
+namespace Microsoft.PowerShell.DesiredStateConfiguration.Internal.CrossPlatform
+{
+    /// <summary>
+    /// Class that does high level Cim schema parsing.
+    /// </summary>
+    internal class CimDSCParser
+    {
+        private readonly JsonDeserializer _jsonDeserializer;
+        
+        internal CimDSCParser()
+        {
+            _jsonDeserializer = JsonDeserializer.Create();
+        }
+
+        internal IEnumerable<PSObject> ParseSchemaJson(string filePath, bool useNewRunspace = false)
+        {
+            try
+            {
+                string json = File.ReadAllText(filePath);
+                string fileNameDefiningClass = Path.GetFileNameWithoutExtension(filePath);
+                int dotIndex = fileNameDefiningClass.IndexOf(".schema", StringComparison.InvariantCultureIgnoreCase);
+                if (dotIndex != -1)
+                {
+                    fileNameDefiningClass = fileNameDefiningClass.Substring(0, dotIndex);
+                }
+
+                IEnumerable<PSObject> result = _jsonDeserializer.DeserializeClasses(json, useNewRunspace);
+                foreach (dynamic classObject in result)
+                {
+                    string superClassName = classObject.SuperClassName;
+                    string className = classObject.ClassName;
+                    if (string.Equals(superClassName, "OMI_BaseResource", StringComparison.OrdinalIgnoreCase))
+                    {
+                        // Get the name of the file without schema.mof/json extension
+                        if (!className.Equals(fileNameDefiningClass, StringComparison.OrdinalIgnoreCase))
+                        {
+                            PSInvalidOperationException e = PSTraceSource.NewInvalidOperationException(
+                                ParserStrings.ClassNameNotSameAsDefiningFile, className, fileNameDefiningClass);
+                            throw e;
+                        }
+                    }
+                }
+
+                return result;
+            }
+            catch (Exception exception)
+            {
+                PSInvalidOperationException e = PSTraceSource.NewInvalidOperationException(
+                    exception, ParserStrings.CimDeserializationError, filePath);
+
+                e.SetErrorId("CimDeserializationError");
+                throw e;
+            }
+        }
+    }
+}

src/DscSubsystem/JsonDeserializer.cs

@@ -0,0 +1,72 @@
+// Copyright (c) Microsoft Corporation.
+// Licensed under the MIT License.
+
+using System;
+using System.Collections;
+using System.Collections.Generic;
+using System.Management.Automation;
+using System.Management.Automation.Runspaces;
+
+namespace Microsoft.PowerShell.DesiredStateConfiguration.Internal.CrossPlatform
+{
+    internal class JsonDeserializer
+    {
+        #region Constructors
+
+        /// <summary>
+        /// Instantiates a default deserializer.
+        /// </summary>
+        /// <returns>Default deserializer.</returns>
+        public static JsonDeserializer Create()
+        {
+            return new JsonDeserializer();
+        }
+
+        #endregion Constructors
+
+        #region Methods
+
+        /// <summary>
+        /// Returns schema of Cim classes from specified json file.
+        /// </summary>
+        /// <param name="json">Json text to deserialize.</param>
+        /// <param name="useNewRunspace">If a new runspace should be used.</param>
+        /// <returns>Deserialized PSObjects.</returns>
+        public IEnumerable<PSObject> DeserializeClasses(string json, bool useNewRunspace = false)
+        {
+            if (string.IsNullOrEmpty(json))
+            {
+                throw new ArgumentNullException(nameof(json));
+            }
+
+            System.Management.Automation.PowerShell powerShell = null;
+
+            if (useNewRunspace)
+            {
+                // currently using RunspaceMode.NewRunspace will reset PSModulePath env var for the entire process
+                // this is something we want to avoid in DSC GuestConfigAgent scenario, so we use following workaround
+                var s_iss = InitialSessionState.CreateDefault();
+                s_iss.EnvironmentVariables.Add(
+                    new SessionStateVariableEntry(
+                        "PSModulePath",
+                        Environment.GetEnvironmentVariable("PSModulePath"),
+                        description: null));
+                powerShell = System.Management.Automation.PowerShell.Create(s_iss);
+            }
+            else
+            {
+                powerShell = System.Management.Automation.PowerShell.Create(RunspaceMode.CurrentRunspace);
+            }
+
+            using (powerShell)
+            {
+                return powerShell.AddCommand("Microsoft.PowerShell.Utility\\ConvertFrom-Json")
+                    .AddParameter("InputObject", json)
+                    .AddParameter("Depth", 100) // maximum supported by cmdlet
+                    .Invoke();
+            }
+        }
+
+        #endregion Methods
+    }
+}

src/DscSubsystem/Microsoft.PowerShell.DscSubsystem.csproj

@@ -0,0 +1,16 @@
+<Project Sdk="Microsoft.NET.Sdk" ToolsVersion="15.0">
+  <PropertyGroup>
+    <TargetFramework>net6.0</TargetFramework>
+    <AssemblyName>Microsoft.PowerShell.DscSubsystem</AssemblyName>
+    
+    <DelaySign>true</DelaySign>
+    <AssemblyOriginatorKeyFile>visualstudiopublic.snk</AssemblyOriginatorKeyFile>
+    <SignAssembly>true</SignAssembly>
+  </PropertyGroup>
+
+  <ItemGroup>
+  <!-- TEMPORARY: This needs to be replaced with <PackageReference Include="System.Management.Automation" /> when Preview 6 is published with subsystem interface. -->
+    <Reference Include="C:\Temp\SMA-Reference\System.Management.Automation.dll"></Reference>
+  </ItemGroup>
+  
+</Project>

src/PSDesiredStateConfiguration/Configuration/BaseRegistration/BaseResource.schema.json

@@ -0,0 +1,232 @@
+[
+  {
+    "ClassName": "MSFT_Credential",
+    "ClassVersion": "1.0.0",
+    "ClassProperties": [
+      {
+        "Name": "UserName",
+        "CimType": "String",
+        "Qualifiers": {
+          "MaxLen": 256
+        }
+      },
+      {
+        "Name": "Password",
+        "CimType": "String"
+      }
+    ]
+  },
+  {
+    "ClassName": "OMI_BaseResource",
+    "ClassVersion": "1.0.0",
+    "ClassProperties": [
+      {
+        "Name": "ResourceId",
+        "CimType": "String",
+        "Qualifiers": {
+          "Required": true
+        }
+      },
+      {
+        "Name": "SourceInfo",
+        "CimType": "String",
+        "Qualifiers": {
+          "Write": true
+        }
+      },
+      {
+        "Name": "DependsOn",
+        "CimType": "StringArray",
+        "Qualifiers": {
+          "Write": true
+        }
+      },
+      {
+        "Name": "ModuleName",
+        "CimType": "String",
+        "Qualifiers": {
+          "Required": true
+        }
+      },
+      {
+        "Name": "ModuleVersion",
+        "CimType": "String",
+        "Qualifiers": {
+          "Required": true
+        }
+      },
+      {
+        "Name": "ConfigurationName",
+        "CimType": "String",
+        "Qualifiers": {
+          "Write": true
+        }
+      },
+      {
+        "Name": "PsDscRunAsCredential",
+        "CimType": "Instance",
+        "ReferenceClassName": "MSFT_Credential",
+        "Qualifiers": {
+          "Write": true,
+          "EmbeddedInstance": "MSFT_Credential"
+        }
+      }
+    ]
+  },
+  {
+    "ClassName": "MSFT_KeyValuePair",
+    "ClassVersion": "1.0.0",
+    "ClassProperties": [
+      {
+        "Name": "Key",
+        "CimType": "String",
+        "Qualifiers": {
+          "Key": true
+        }
+      },
+      {
+        "Name": "Value",
+        "CimType": "String",
+        "Qualifiers": {
+          "Write": true
+        }
+      }
+    ]
+  },
+  {
+    "ClassName": "MSFT_BaseConfigurationProviderRegistration",
+    "ClassVersion": "1.0.0",
+    "ClassProperties": [
+      {
+        "Name": "ClassName",
+        "CimType": "String",
+        "Qualifiers": {
+          "Key": true
+        }
+      },
+      {
+        "Name": "DSCEngineCompatVersion",
+        "CimType": "String"
+      },
+      {
+        "Name": "DSCModuleVersion",
+        "CimType": "String"
+      }
+    ]
+  },
+  {
+    "ClassName": "MSFT_CimConfigurationProviderRegistration",
+    "ClassVersion": "1.0.0",
+    "SuperClassName": "MSFT_BaseConfigurationProviderRegistration",
+    "ClassProperties": [
+      {
+        "Name": "Namespace",
+        "CimType": "String"
+      }
+    ]
+  },
+  {
+    "ClassName": "MSFT_PSConfigurationProviderRegistration",
+    "ClassVersion": "1.0.0",
+    "SuperClassName": "MSFT_BaseConfigurationProviderRegistration",
+    "ClassProperties": [
+      {
+        "Name": "ModuleName",
+        "CimType": "String"
+      },
+      {
+        "Name": "ProviderPath",
+        "CimType": "String"
+      },
+      {
+        "Name": "ModulePath",
+        "CimType": "String"
+      }
+    ]
+  },
+  {
+    "ClassName": "OMI_ConfigurationDocument",
+    "ClassVersion": "1.0.0",
+    "ClassProperties": [
+      {
+        "Name": "Version",
+        "CimType": "String"
+      },
+      {
+        "Name": "Author",
+        "CimType": "String"
+      },
+      {
+        "Name": "Copyright",
+        "CimType": "String"
+      },
+      {
+        "Name": "HelpInfoUri",
+        "CimType": "String"
+      },
+      {
+        "Name": "ContentType",
+        "CimType": "String"
+      },
+      {
+        "Name": "GenerationDate",
+        "CimType": "String"
+      },
+      {
+        "Name": "GenerationHost",
+        "CimType": "String"
+      },
+      {
+        "Name": "Name",
+        "CimType": "String"
+      },
+      {
+        "Name": "MinimumCompatibleVersion",
+        "CimType": "String"
+      },
+      {
+        "Name": "CompatibleVersionAdditionalProperties",
+        "CimType": "StringArray"
+      },
+      {
+        "Name": "UseCms",
+        "CimType": "Boolean"
+      }
+    ]
+  },
+  {
+    "ClassName": "OMI_MetaConfigurationResource",
+    "ClassVersion": "1.0.0",
+    "ClassProperties": [
+      {
+        "Name": "ResourceId",
+        "CimType": "String",
+        "Qualifiers": {
+          "Required": true
+        }
+      },
+      {
+        "Name": "SourceInfo",
+        "CimType": "String",
+        "Qualifiers": {
+          "Write": true
+        }
+      }
+    ]
+  },
+  {
+    "ClassName": "OMI_ResourceModuleManager",
+    "ClassVersion": "1.0.0",
+    "SuperClassName": "OMI_MetaConfigurationResource"
+  },
+  {
+    "ClassName": "OMI_ConfigurationDownloadManager",
+    "ClassVersion": "1.0.0",
+    "SuperClassName": "OMI_MetaConfigurationResource"
+  },
+  {
+    "ClassName": "OMI_ReportManager",
+    "ClassVersion": "1.0.0",
+    "SuperClassName": "OMI_MetaConfigurationResource"
+  }
+]

src/PSDesiredStateConfiguration/Configuration/BaseRegistration/MSFT_DSCMetaConfiguration.json

@@ -0,0 +1,218 @@
+{
+  "ClassName": "MSFT_DSCMetaConfiguration",
+  "FriendlyName": "LocalConfigurationManager",
+  "ClassVersion": "1.0.0",
+  "ClassProperties": [
+    {
+      "Name": "ConfigurationModeFrequencyMins",
+      "CimType": "UInt32"
+    },
+    {
+      "Name": "RebootNodeIfNeeded",
+      "CimType": "Boolean"
+    },
+    {
+      "Name": "ConfigurationMode",
+      "CimType": "String",
+      "Qualifiers": {
+        "ValueMap": [
+          "ApplyOnly",
+          "ApplyAndMonitor",
+          "ApplyAndAutoCorrect",
+          "MonitorOnly"
+        ],
+        "Values": [
+          "ApplyOnly",
+          "ApplyAndMonitor",
+          "ApplyAndAutoCorrect",
+          "MonitorOnly"
+        ]
+      }
+    },
+    {
+      "Name": "ActionAfterReboot",
+      "CimType": "String",
+      "Qualifiers": {
+        "ValueMap": [
+          "ContinueConfiguration",
+          "StopConfiguration"
+        ],
+        "Values": [
+          "ContinueConfiguration",
+          "StopConfiguration"
+        ]
+      }
+    },
+    {
+      "Name": "Credential",
+      "CimType": "Instance",
+      "ReferenceClassName": "MSFT_Credential",
+      "Qualifiers": {
+        "EmbeddedInstance": "MSFT_Credential"
+      }
+    },
+    {
+      "Name": "RefreshMode",
+      "CimType": "String",
+      "Qualifiers": {
+        "ValueMap": [
+          "Push",
+          "Pull",
+          "Disabled"
+        ],
+        "Values": [
+          "Push",
+          "Pull",
+          "Disabled"
+        ]
+      }
+    },
+    {
+      "Name": "CertificateID",
+      "CimType": "String"
+    },
+    {
+      "Name": "ConfigurationID",
+      "CimType": "String"
+    },
+    {
+      "Name": "DownloadManagerName",
+      "CimType": "String"
+    },
+    {
+      "Name": "DownloadManagerCustomData",
+      "CimType": "InstanceArray",
+      "ReferenceClassName": "MSFT_KeyValuePair",
+      "Qualifiers": {
+        "EmbeddedInstance": "MSFT_KeyValuePair"
+      }
+    },
+    {
+      "Name": "RefreshFrequencyMins",
+      "CimType": "UInt32"
+    },
+    {
+      "Name": "AllowModuleOverwrite",
+      "CimType": "Boolean"
+    },
+    {
+      "Name": "DebugMode",
+      "CimType": "StringArray",
+      "Qualifiers": {
+        "ValueMap": [
+          "None",
+          "ForceModuleImport",
+          "All",
+          "ResourceScriptBreakAll",
+          "ResourceScriptBreakpoint"
+        ],
+        "Values": [
+          "None",
+          "ForceModuleImport",
+          "All",
+          "ResourceScriptBreakAll",
+          "ResourceScriptBreakpoint"
+        ]
+      }
+    },
+    {
+      "Name": "LCMVersion",
+      "CimType": "String",
+      "Qualifiers": {
+        "Read": true
+      }
+    },
+    {
+      "Name": "LCMCompatibleVersions",
+      "CimType": "StringArray",
+      "Qualifiers": {
+        "Read": true
+      }
+    },
+    {
+      "Name": "LCMState",
+      "CimType": "String",
+      "Qualifiers": {
+        "Read": true,
+        "ValueMap": [
+          "Idle",
+          "Busy",
+          "PendingReboot",
+          "PendingConfiguration"
+        ],
+        "Values": [
+          "Idle",
+          "Busy",
+          "PendingReboot",
+          "PendingConfiguration"
+        ]
+      }
+    },
+    {
+      "Name": "LCMStateDetail",
+      "CimType": "String",
+      "Qualifiers": {
+        "Read": true
+      }
+    },
+    {
+      "Name": "ConfigurationDownloadManagers",
+      "CimType": "InstanceArray",
+      "ReferenceClassName": "OMI_ConfigurationDownloadManager",
+      "Qualifiers": {
+        "EmbeddedInstance": "OMI_ConfigurationDownloadManager"
+      }
+    },
+    {
+      "Name": "ResourceModuleManagers",
+      "CimType": "InstanceArray",
+      "ReferenceClassName": "OMI_ResourceModuleManager",
+      "Qualifiers": {
+        "EmbeddedInstance": "OMI_ResourceModuleManager"
+      }
+    },
+    {
+      "Name": "ReportManagers",
+      "CimType": "InstanceArray",
+      "ReferenceClassName": "OMI_ReportManager",
+      "Qualifiers": {
+        "EmbeddedInstance": "OMI_ReportManager"
+      }
+    },
+    {
+      "Name": "PartialConfigurations",
+      "CimType": "InstanceArray",
+      "ReferenceClassName": "MSFT_PartialConfiguration",
+      "Qualifiers": {
+        "EmbeddedInstance": "MSFT_PartialConfiguration"
+      }
+    },
+    {
+      "Name": "StatusRetentionTimeInDays",
+      "CimType": "UInt32"
+    },
+    {
+      "Name": "AgentId",
+      "CimType": "String",
+      "Qualifiers": {
+        "Read": true
+      }
+    },
+    {
+      "Name": "SignatureValidationPolicy",
+      "CimType": "String"
+    },
+    {
+      "Name": "SignatureValidations",
+      "CimType": "InstanceArray",
+      "ReferenceClassName": "MSFT_SignatureValidation",
+      "Qualifiers": {
+        "EmbeddedInstance": "MSFT_SignatureValidation"
+      }
+    },
+    {
+      "Name": "MaximumDownloadSizeMB",
+      "CimType": "UInt32"
+    }
+  ]
+}

src/PSDesiredStateConfiguration/Configuration/BaseRegistration/MSFT_MetaConfigurationExtensionClasses.schema.json

@@ -0,0 +1,455 @@
+[
+  {
+    "ClassName": "MSFT_WebDownloadManager",
+    "FriendlyName": "ConfigurationRepositoryWeb",
+    "ClassVersion": "1.0.0",
+    "SuperClassName": "OMI_ConfigurationDownloadManager",
+    "ClassProperties": [
+      {
+        "Name": "ServerURL",
+        "CimType": "String",
+        "Qualifiers": {
+          "Key": true
+        }
+      },
+      {
+        "Name": "CertificateID",
+        "CimType": "String"
+      },
+      {
+        "Name": "AllowUnsecureConnection",
+        "CimType": "Boolean"
+      },
+      {
+        "Name": "RegistrationKey",
+        "CimType": "String"
+      },
+      {
+        "Name": "ConfigurationNames",
+        "CimType": "StringArray"
+      },
+      {
+        "Name": "ProxyURL",
+        "CimType": "String"
+      },
+      {
+        "Name": "ProxyCredential",
+        "CimType": "Instance",
+        "ReferenceClassName": "MSFT_Credential",
+        "Qualifiers": {
+          "EmbeddedInstance": "MSFT_Credential"
+        }
+      }
+    ]
+  },
+  {
+    "ClassName": "MSFT_FileDownloadManager",
+    "FriendlyName": "ConfigurationRepositoryShare",
+    "ClassVersion": "1.0.0",
+    "SuperClassName": "OMI_ConfigurationDownloadManager",
+    "ClassProperties": [
+      {
+        "Name": "SourcePath",
+        "CimType": "String",
+        "Qualifiers": {
+          "Key": true
+        }
+      },
+      {
+        "Name": "Credential",
+        "CimType": "Instance",
+        "ReferenceClassName": "MSFT_Credential",
+        "Qualifiers": {
+          "EmbeddedInstance": "MSFT_Credential"
+        }
+      }
+    ]
+  },
+  {
+    "ClassName": "MSFT_WebResourceManager",
+    "FriendlyName": "ResourceRepositoryWeb",
+    "ClassVersion": "1.0.0",
+    "SuperClassName": "OMI_ResourceModuleManager",
+    "ClassProperties": [
+      {
+        "Name": "ServerURL",
+        "CimType": "String",
+        "Qualifiers": {
+          "Key": true
+        }
+      },
+      {
+        "Name": "CertificateID",
+        "CimType": "String"
+      },
+      {
+        "Name": "AllowUnsecureConnection",
+        "CimType": "Boolean"
+      },
+      {
+        "Name": "RegistrationKey",
+        "CimType": "String"
+      },
+      {
+        "Name": "ProxyURL",
+        "CimType": "String"
+      },
+      {
+        "Name": "ProxyCredential",
+        "CimType": "Instance",
+        "ReferenceClassName": "MSFT_Credential",
+        "Qualifiers": {
+          "EmbeddedInstance": "MSFT_Credential"
+        }
+      }
+    ]
+  },
+  {
+    "ClassName": "MSFT_FileResourceManager",
+    "FriendlyName": "ResourceRepositoryShare",
+    "ClassVersion": "1.0.0",
+    "SuperClassName": "OMI_ResourceModuleManager",
+    "ClassProperties": [
+      {
+        "Name": "SourcePath",
+        "CimType": "String",
+        "Qualifiers": {
+          "Key": true
+        }
+      },
+      {
+        "Name": "Credential",
+        "CimType": "Instance",
+        "ReferenceClassName": "MSFT_Credential",
+        "Qualifiers": {
+          "EmbeddedInstance": "MSFT_Credential"
+        }
+      }
+    ]
+  },
+  {
+    "ClassName": "MSFT_WebReportManager",
+    "FriendlyName": "ReportServerWeb",
+    "ClassVersion": "1.0.0",
+    "SuperClassName": "OMI_ReportManager",
+    "ClassProperties": [
+      {
+        "Name": "ServerURL",
+        "CimType": "String",
+        "Qualifiers": {
+          "Key": true
+        }
+      },
+      {
+        "Name": "CertificateID",
+        "CimType": "String"
+      },
+      {
+        "Name": "AllowUnsecureConnection",
+        "CimType": "Boolean"
+      },
+      {
+        "Name": "RegistrationKey",
+        "CimType": "String"
+      },
+      {
+        "Name": "ProxyURL",
+        "CimType": "String"
+      },
+      {
+        "Name": "ProxyCredential",
+        "CimType": "Instance",
+        "ReferenceClassName": "MSFT_Credential",
+        "Qualifiers": {
+          "EmbeddedInstance": "MSFT_Credential"
+        }
+      }
+    ]
+  },
+  {
+    "ClassName": "MSFT_PartialConfiguration",
+    "FriendlyName": "PartialConfiguration",
+    "ClassVersion": "1.0.0",
+    "SuperClassName": "OMI_MetaConfigurationResource",
+    "ClassProperties": [
+      {
+        "Name": "Description",
+        "CimType": "String",
+        "Qualifiers": {
+          "Write": true
+        }
+      },
+      {
+        "Name": "ExclusiveResources",
+        "CimType": "StringArray",
+        "Qualifiers": {
+          "Write": true
+        }
+      },
+      {
+        "Name": "ConfigurationSource",
+        "CimType": "StringArray",
+        "Qualifiers": {
+          "Write": true
+        }
+      },
+      {
+        "Name": "ResourceModuleSource",
+        "CimType": "StringArray",
+        "Qualifiers": {
+          "Write": true
+        }
+      },
+      {
+        "Name": "DependsOn",
+        "CimType": "StringArray",
+        "Qualifiers": {
+          "Write": true
+        }
+      },
+      {
+        "Name": "RefreshMode",
+        "CimType": "String",
+        "Qualifiers": {
+          "ValueMap": [
+            "Push",
+            "Pull",
+            "Disabled"
+          ],
+          "Values": [
+            "Push",
+            "Pull",
+            "Disabled"
+          ]
+        }
+      }
+    ]
+  },
+  {
+    "ClassName": "MSFT_SignatureValidation",
+    "FriendlyName": "SignatureValidation",
+    "ClassVersion": "1.0.0",
+    "SuperClassName": "OMI_MetaConfigurationResource",
+    "ClassProperties": [
+      {
+        "Name": "TrustedStorePath",
+        "CimType": "String",
+        "Qualifiers": {
+          "Write": true
+        }
+      },
+      {
+        "Name": "SignedItemType",
+        "CimType": "StringArray",
+        "Qualifiers": {
+          "ValueMap": [
+            "Configuration",
+            "Module"
+          ],
+          "Values": [
+            "Configuration",
+            "Module"
+          ]
+        }
+      }
+    ]
+  },
+  {
+    "ClassName": "MSFT_DSCMetaConfigurationV2",
+    "FriendlyName": "Settings",
+    "ClassVersion": "2.0.0",
+    "ClassProperties": [
+      {
+        "Name": "ConfigurationModeFrequencyMins",
+        "CimType": "UInt32"
+      },
+      {
+        "Name": "RebootNodeIfNeeded",
+        "CimType": "Boolean"
+      },
+      {
+        "Name": "ConfigurationMode",
+        "CimType": "String",
+        "Qualifiers": {
+          "ValueMap": [
+            "ApplyOnly",
+            "ApplyAndMonitor",
+            "ApplyAndAutoCorrect",
+            "MonitorOnly"
+          ],
+          "Values": [
+            "ApplyOnly",
+            "ApplyAndMonitor",
+            "ApplyAndAutoCorrect",
+            "MonitorOnly"
+          ]
+        }
+      },
+      {
+        "Name": "ActionAfterReboot",
+        "CimType": "String",
+        "Qualifiers": {
+          "ValueMap": [
+            "ContinueConfiguration",
+            "StopConfiguration"
+          ],
+          "Values": [
+            "ContinueConfiguration",
+            "StopConfiguration"
+          ]
+        }
+      },
+      {
+        "Name": "RefreshMode",
+        "CimType": "String",
+        "Qualifiers": {
+          "ValueMap": [
+            "Push",
+            "Pull",
+            "Disabled"
+          ],
+          "Values": [
+            "Push",
+            "Pull",
+            "Disabled"
+          ]
+        }
+      },
+      {
+        "Name": "CertificateID",
+        "CimType": "String"
+      },
+      {
+        "Name": "ConfigurationID",
+        "CimType": "String"
+      },
+      {
+        "Name": "RefreshFrequencyMins",
+        "CimType": "UInt32"
+      },
+      {
+        "Name": "AllowModuleOverwrite",
+        "CimType": "Boolean"
+      },
+      {
+        "Name": "DebugMode",
+        "CimType": "StringArray",
+        "Qualifiers": {
+          "ValueMap": [
+            "None",
+            "ForceModuleImport",
+            "All",
+            "ResourceScriptBreakAll",
+            "ResourceScriptBreakpoint"
+          ],
+          "Values": [
+            "None",
+            "ForceModuleImport",
+            "All",
+            "ResourceScriptBreakAll",
+            "ResourceScriptBreakpoint"
+          ]
+        }
+      },
+      {
+        "Name": "LCMVersion",
+        "CimType": "String",
+        "Qualifiers": {
+          "Read": true
+        }
+      },
+      {
+        "Name": "LCMCompatibleVersions",
+        "CimType": "StringArray",
+        "Qualifiers": {
+          "Read": true
+        }
+      },
+      {
+        "Name": "LCMState",
+        "CimType": "String",
+        "Qualifiers": {
+          "Read": true,
+          "ValueMap": [
+            "Idle",
+            "Busy",
+            "PendingReboot",
+            "PendingConfiguration"
+          ],
+          "Values": [
+            "Idle",
+            "Busy",
+            "PendingReboot",
+            "PendingConfiguration"
+          ]
+        }
+      },
+      {
+        "Name": "LCMStateDetail",
+        "CimType": "String",
+        "Qualifiers": {
+          "Read": true
+        }
+      },
+      {
+        "Name": "ConfigurationDownloadManagers",
+        "CimType": "InstanceArray",
+        "ReferenceClassName": "OMI_ConfigurationDownloadManager",
+        "Qualifiers": {
+          "EmbeddedInstance": "OMI_ConfigurationDownloadManager"
+        }
+      },
+      {
+        "Name": "ResourceModuleManagers",
+        "CimType": "InstanceArray",
+        "ReferenceClassName": "OMI_ResourceModuleManager",
+        "Qualifiers": {
+          "EmbeddedInstance": "OMI_ResourceModuleManager"
+        }
+      },
+      {
+        "Name": "ReportManagers",
+        "CimType": "InstanceArray",
+        "ReferenceClassName": "OMI_ReportManager",
+        "Qualifiers": {
+          "EmbeddedInstance": "OMI_ReportManager"
+        }
+      },
+      {
+        "Name": "PartialConfigurations",
+        "CimType": "InstanceArray",
+        "ReferenceClassName": "MSFT_PartialConfiguration",
+        "Qualifiers": {
+          "EmbeddedInstance": "MSFT_PartialConfiguration"
+        }
+      },
+      {
+        "Name": "StatusRetentionTimeInDays",
+        "CimType": "UInt32"
+      },
+      {
+        "Name": "AgentId",
+        "CimType": "String",
+        "Qualifiers": {
+          "Read": true
+        }
+      },
+      {
+        "Name": "SignatureValidationPolicy",
+        "CimType": "String"
+      },
+      {
+        "Name": "SignatureValidations",
+        "CimType": "InstanceArray",
+        "ReferenceClassName": "MSFT_SignatureValidation",
+        "Qualifiers": {
+          "EmbeddedInstance": "MSFT_SignatureValidation"
+        }
+      },
+      {
+        "Name": "MaximumDownloadSizeMB",
+        "CimType": "UInt32"
+      }
+    ]
+  }
+]

src/PSDesiredStateConfiguration/PSDesiredStateConfiguration.psd1

@@ -9,7 +9,7 @@
 RootModule = 'PSDesiredStateConfiguration.psm1'
 
 # Version number of this module.
-moduleVersion = '2.0.5'
+moduleVersion = '3.0.0'
 
 # Supported PSEditions
 CompatiblePSEditions = @('Core')
@@ -30,7 +30,7 @@ Copyright = '(c) Microsoft Corporation. All rights reserved.'
 Description = 'PowerShell Desired State Configuration'
 
 # Minimum version of the Windows PowerShell engine required by this module
-PowerShellVersion = '6.1'
+PowerShellVersion = '7.1'
 
 # Name of the Windows PowerShell host required by this module
 # PowerShellHostName = ''
@@ -48,7 +48,7 @@ PowerShellVersion = '6.1'
 # ProcessorArchitecture = ''
 
 # Modules that must be imported into the global environment prior to importing this module
-# RequiredModules = @()
+ #RequiredModules = @()
 
 # Assemblies that must be loaded prior to importing this module
 # RequiredAssemblies = @()
@@ -63,7 +63,7 @@ PowerShellVersion = '6.1'
 # FormatsToProcess = @()
 
 # Modules to import as nested modules of the module specified in RootModule/ModuleToProcess
-# NestedModules = @()
+ NestedModules = @('Microsoft.PowerShell.DscSubsystem.dll')
 
 # Functions to export from this module, for best performance, do not use wildcards and do not delete the entry, use an empty array if there are no functions to export.
 FunctionsToExport = @(
@@ -71,6 +71,7 @@ FunctionsToExport = @(
         'New-DscChecksum'
         'Get-DscResource'
         'Invoke-DscResource'
+        'ConvertTo-DscJsonSchema'
     )
 
 

src/PSDesiredStateConfiguration/PSDesiredStateConfiguration.psm1

@@ -16,7 +16,7 @@ data LocalizedData
     InvalidConfigurationName = Invalid Configuration Name '{0}' is specified. Standard names may only contain letters (a-z, A-Z), numbers (0-9), and underscore (_). The name may not be null or empty, and should start with a letter.
     InvalidResourceSpecification = Found more than one resource named '{0}'. Please use the module specification to be more specific.
     UnsupportedResourceImplementation = The resource '{0}' implemented as '{1}' is not supported by Invoke-DscResource.
-    NoValidConfigFileFound = No valid config files (mof,zip) were found.
+    NoValidConfigFileFound = No valid config files (json,zip) were found.
     InputFileNotExist=File {0} doesn't exist.
     FileReadError=Error Reading file {0}.
     MatchingFileNotFound=No matching file found.
@@ -76,7 +76,7 @@ Import-LocalizedData  -BindingVariable LocalizedData -FileName PSDesiredStateCon
 Import-Module $PSScriptRoot/helpers/DscResourceInfo.psm1
 
 # Set DSC HOME environment variable.
-$env:DSC_HOME = "$PSScriptRoot/Configuration"
+$env:DSC_HOME = Join-Path $PSScriptRoot "Configuration"
 
 $script:V1MetaConfigPropertyList = @('ConfigurationModeFrequencyMins', 'RebootNodeIfNeeded', 'ConfigurationMode', 'ActionAfterReboot', 'RefreshMode', 'CertificateID', 'ConfigurationID', 'DownloadManagerName', 'DownloadManagerCustomData', 'RefreshFrequencyMins', 'AllowModuleOverwrite', 'DebugMode', 'Credential')
 $script:DirectAccessMetaConfigPropertyList = @('AllowModuleOverWrite', 'CertificateID', 'ConfigurationDownloadManagers', 'ResourceModuleManagers', 'DebugMode', 'RebootNodeIfNeeded', 'RefreshMode', 'ConfigurationAgent')
@@ -307,7 +307,7 @@ function ConvertTo-MOFInstance
         elseif ($Value -is [PSCredential] )
         {
             # If the input object is a PSCredential, turn it into an MSFT_Credential with an encrypted password.
-            $clearText = [Microsoft.PowerShell.DesiredStateConfiguration.Internal.DscClassCache]::GetStringFromSecureString($Value.Password)
+            $clearText = [Microsoft.PowerShell.DesiredStateConfiguration.Internal.CrossPlatform.DscClassCache]::GetStringFromSecureString($Value.Password)
             $newValue = @{
                 UserName = $Value.UserName
                 Password = $clearText
@@ -1793,59 +1793,6 @@ function ValidateUpdate-ConfigurationData
     return $true
 }
 
-##############################################################
-#
-# Checks to see if a module defining composite resources should be reloaded
-# based the last write time of the schema file. Returns true if the file exists
-# and the last modified time was either not recorded or has change.
-#
-function Test-ModuleReloadRequired
-{
-    [OutputType([bool])]
-    param (
-        [Parameter(Mandatory)]
-        [string]
-        $SchemaFilePath
-    )
-
-    if (-not $SchemaFilePath -or  $SchemaFilePath -notmatch '\.schema\.psm1$')
-    {
-        # not a composite res
-        return $false
-    }
-
-    # If the path doesn't exist, then we can't reload it.
-    # Note: this condition is explicitly not an error for this function.
-    if ( -not (Test-Path $SchemaFilePath))
-    {
-        if ($schemaFileLastUpdate.ContainsKey($SchemaFilePath))
-        {
-            $schemaFileLastUpdate.Remove($SchemaFilePath)
-        }
-        return $false
-    }
-
-    # If we have a modified date, then return it.
-    if ($schemaFileLastUpdate.ContainsKey($SchemaFilePath))
-    {
-        if ( (Get-Item $SchemaFilePath).LastWriteTime -eq $schemaFileLastUpdate[$SchemaFilePath] )
-        {
-            return $false
-        }
-        else
-        {
-            return $true
-        }
-    }
-
-    # Otherwise, record the last write time and return true.
-    $script:schemaFileLastUpdate[$SchemaFilePath] = (Get-Item $SchemaFilePath).LastWriteTime
-    $true
-}
-# Holds the schema file to lastwritetime mapping.
-[System.Collections.Generic.Dictionary[string,DateTime]] $script:schemaFileLastUpdate =
-New-Object -TypeName 'System.Collections.Generic.Dictionary[string,datetime]'
-
 ###########################################################
 # Configuration keyword implementation
 ###########################################################
@@ -1971,7 +1918,7 @@ function Configuration
 
             # Load the default CIM keyword/function definitions set, populating the function collection
             # with the default functions.
-            [Microsoft.PowerShell.DesiredStateConfiguration.Internal.DscClassCache]::LoadDefaultCimKeywords($functionsToDefine)
+            [Microsoft.PowerShell.DesiredStateConfiguration.Internal.CrossPlatform.DscClassCache]::LoadDefaultCimKeywords($functionsToDefine)
 
             # Set up the rest of the configuration runtime state.
             Initialize-ConfigurationRuntimeState $Name
@@ -2062,25 +2009,8 @@ function Configuration
             foreach ($mod in $modulesInfo) {
 
                 $null = ImportClassResourcesFromModule -Module $mod -Resources $res -functionsToDefine $functionsToDefine
-                $dscResourcesPath = Join-Path -Path $mod.ModuleBase -ChildPath 'DscResources'
-                if(Test-Path $dscResourcesPath)
-                {
-                    foreach($requiredResource in $res)
-                    {
-                        if ($requiredResource.Contains('*')) {
-                            # we historically resolve wildcards by Get-Item File System rules.
-                            # We don't support wildcards resolutions for Friendly names.
-                            foreach ($resource in Get-ChildItem -Path $dscResourcesPath -Directory -Name -Filter $requiredResource)
-                            {
-                                $null = ImportCimAndScriptKeywordsFromModule -Module $mod -Resource $resource -functionsToDefine $functionsToDefine
-                            }
-                        } else {
-                            # ImportCimAndScriptKeywordsFromModule takes care about resolving $requiredResources names to ClassNames or FriendlyNames.
-                            $null = ImportCimAndScriptKeywordsFromModule -Module $mod -Resource $requiredResource -functionsToDefine $functionsToDefine
-                        }
-                    }
-                }
-                elseif ($moduleInfos.Count -eq 1)
+                
+                if ($moduleInfos.Count -eq 1)
                 {
                     $modules.Add($moduleInfos)
                 }
@@ -2316,7 +2246,7 @@ function Configuration
         {
             Write-Debug -Message "  CONFIGURATION $Name : DOING TOP-LEVEL CLEAN UP"
             [System.Management.Automation.Language.DynamicKeyword]::Reset()
-            [Microsoft.PowerShell.DesiredStateConfiguration.Internal.DscClassCache]::ClearCache()
+            [Microsoft.PowerShell.DesiredStateConfiguration.Internal.CrossPlatform.DscClassCache]::ClearCache()
 
             Initialize-ConfigurationRuntimeState
         }
@@ -2493,66 +2423,16 @@ function ImportClassResourcesFromModule
         $functionsToDefine
     )
 
-    $resourcesFound = [Microsoft.PowerShell.DesiredStateConfiguration.Internal.DscClassCache]::ImportClassResourcesFromModule($Module, $Resources, $functionsToDefine)
-    return ,$resourcesFound
-}
+    $Errors = New-Object -TypeName 'System.Collections.ObjectModel.Collection[System.Exception]'
 
-function ImportCimAndScriptKeywordsFromModule
-{
-    param (
-        [Parameter(Mandatory)]
-        $Module,
+    $resourcesFound = [Microsoft.PowerShell.DesiredStateConfiguration.Internal.CrossPlatform.DscClassCache]::ImportClassResourcesFromModule($Module, $Resources, $functionsToDefine, $Errors)
 
-        [Parameter(Mandatory)]
-        $resource,
-
-        $functionsToDefine
-    )
-
-    trap
-    {
-        continue
-    }
-
-    $SchemaFilePath = $null
-    $oldCount = $functionsToDefine.Count
-
-    $keywordErrors = New-Object -TypeName 'System.Collections.ObjectModel.Collection[System.Exception]'
-
-    $foundCimSchema = [Microsoft.PowerShell.DesiredStateConfiguration.Internal.DscClassCache]::ImportCimKeywordsFromModule(
-    $Module, $resource, [ref] $SchemaFilePath, $functionsToDefine, $keywordErrors)
-
-    foreach($ex in $keywordErrors)
+    foreach($ex in $Errors)
     {
         Write-Error -Exception $ex
-        if($ex.InnerException)
-        {
-            Write-Error -Exception $ex.InnerException
-        }
     }
 
-    $functionsAdded = $functionsToDefine.Count - $oldCount
-    Write-Debug -Message "  $Name : PROCESSING RESOURCE FILE: Added $functionsAdded type handler functions from  '$SchemaFilePath'"
-
-    $SchemaFilePath = $null
-    $oldCount = $functionsToDefine.Count
-
-    $foundScriptSchema = [Microsoft.PowerShell.DesiredStateConfiguration.Internal.DscClassCache]::ImportScriptKeywordsFromModule(
-    $Module, $resource, [ref] $SchemaFilePath, $functionsToDefine )
-
-    $functionsAdded = $functionsToDefine.Count - $oldCount
-    Write-Debug -Message "  $Name : PROCESSING RESOURCE FILE: Added $functionsAdded type handler functions from  '$SchemaFilePath'"
-
-    if ($foundScriptSchema -and $SchemaFilePath)
-    {
-        $resourceDirectory = Split-Path $SchemaFilePath
-        if($null -ne $resourceDirectory)
-        {
-            Import-Module -Force: (Test-ModuleReloadRequired $SchemaFilePath) -Verbose:$false -Name $resourceDirectory -Global -ErrorAction SilentlyContinue
-        }
-    }
-
-    return $foundCimSchema -or $foundScriptSchema
+    return ,$resourcesFound
 }
 
 #
@@ -2946,16 +2826,6 @@ function Write-NodeMOFFile
     # Fix up newlines to be CRLF
     $nodeDoc = $nodeDoc -replace "`n", "`r`n"
 
-    $errMsg = Test-MofInstanceText $nodeDoc
-    if($errMsg)
-    {
-        $errorMessage = $LocalizedData.InvalidMOFDefinition -f @($mofNode, $errMsg)
-        $exception = New-Object -TypeName System.InvalidOperationException -ArgumentList $errorMessage
-        Write-Error -Exception $exception -Message $errorMessage -Category InvalidOperation -ErrorId InvalidMOFDefinition
-        Update-ConfigurationErrorCount
-        $nodeOutfile = "$ConfigurationOutputDirectory/$($mofNode).mof.error"
-    }
-
     if($nodeDocCount -gt 0)
     {
         # Write to a file only if no error was generated or we are writing to .mof.error file
@@ -3412,7 +3282,7 @@ function Test-MofInstanceText
     {
         try
         {
-            [Microsoft.PowerShell.DesiredStateConfiguration.Internal.DscClassCache]::ValidateInstanceText($instanceText)
+            [Microsoft.PowerShell.DesiredStateConfiguration.Internal.CrossPlatform.DscClassCache]::ValidateInstanceText($instanceText)
         }
         catch [System.Management.Automation.MethodInvocationException]
         {
@@ -3655,7 +3525,7 @@ function New-DscChecksum
     # Retrieve all valid configuration files at the specified $Path
     $allConfigFiles = $Path | ForEach-Object  -Process {
         (Get-ChildItem -Path $_ -Recurse | Where-Object -FilterScript {
-                $_.Extension -eq '.mof' -or $_.Extension -eq '.zip'
+                $_.Extension -eq '.json' -or $_.Extension -eq '.zip'
             }
         )
     }
@@ -3664,7 +3534,6 @@ function New-DscChecksum
     if ($allConfigFiles.Length -eq 0)
     {
         Write-Log -Message $LocalizedData.NoValidConfigFileFound
-
         return
     }
 
@@ -3850,22 +3719,12 @@ function Get-DSCResourceModules
         foreach($moduleFolder in Get-ChildItem $folder -Directory)
         {
             $addModule = $false
-
-            $dscFolders = Get-childitem "$($moduleFolder.FullName)\DscResources","$($moduleFolder.FullName)\*\DscResources" -ErrorAction Ignore
-            if($null -ne $dscFolders)
+            foreach($psd1 in Get-ChildItem -Recurse -Filter "$($moduleFolder.Name).psd1" -Path $moduleFolder.fullname -Depth 2)
             {
-                $addModule = $true
-            }
-
-            if(-not $addModule)
-            {
-                foreach($psd1 in Get-ChildItem -Recurse -Filter "$($moduleFolder.Name).psd1" -Path $moduleFolder.fullname -Depth 2)
+                $containsDSCResource = select-string -LiteralPath $psd1 -pattern '^[^#]*\bDscResourcesToExport\b.*'
+                if($null -ne $containsDSCResource)
                 {
-                    $containsDSCResource = select-string -LiteralPath $psd1 -pattern '^[^#]*\bDscResourcesToExport\b.*'
-                    if($null -ne $containsDSCResource)
-                    {
-                        $addModule = $true
-                    }
+                    $addModule = $true
                 }
             }
 
@@ -3879,14 +3738,167 @@ function Get-DSCResourceModules
     $dscModuleFolderList
 }
 
+function CimPropertyIsInherited
+{
+    param(
+        [parameter(Mandatory)]
+        [string]
+        $PropertyName,
+        
+        [parameter(Mandatory)]
+        [AllowNull()]
+        [System.Object]
+        $ParentClass)
+
+    if (-not ($ParentClass))
+    {
+        return $false;
+    }
+    else
+    {
+        foreach($property in $ParentClass.CimClassProperties)
+        {
+            if ($property.Name -eq $PropertyName)
+            {
+                return $true;
+            }
+        }
+
+        return CimPropertyIsInherited -PropertyName $PropertyName -ParentClass $ParentClass.CimSuperClass
+    }
+}
+
+function PrepareCimClassesForJsonConvertion
+{
+    param(
+    [parameter(Mandatory)]
+    $classList)
+
+    $resultList = New-Object -TypeName 'System.Collections.Generic.List[PSObject]'
+
+    foreach($class in $classList)
+    {
+        Write-Verbose "Preprocessing class $($class.CimSystemProperties.ClassName)"
+        $properties = New-Object -TypeName 'System.Collections.Generic.List[System.Object]'
+
+        # remove inherited properties
+        foreach($property in $class.CimClassProperties)
+        {
+            if (-not (CimPropertyIsInherited -PropertyName $property.Name -ParentClass $class.CimSuperClass))
+            {
+                Write-Verbose "Adding property $($property.Name)"
+                
+                $qualifiers = New-Object -TypeName 'System.Collections.Generic.Dictionary[System.String,System.Object]'
+                foreach($qualifier in $property.Qualifiers)
+                {
+                    $qualifiers.Add($qualifier.Name, $qualifier.Value)
+                }
+
+                if ($qualifiers.Count -eq 0) { $qualifiers = $null}
+
+                $flags = $property.Flags
+                $flags = $flags -band -bnot [Microsoft.Management.Infrastructure.CimFlags]::Property # this is set for all properties
+                $flags = $flags -band -bnot [Microsoft.Management.Infrastructure.CimFlags]::NullValue # this is set for all properties
+                $flags = $flags -band -bnot [Microsoft.Management.Infrastructure.CimFlags]::Required # this is also specified in Qualifiers
+                $flags = $flags -band -bnot [Microsoft.Management.Infrastructure.CimFlags]::Key # this is also specified in Qualifiers
+                $flags = $flags -band -bnot [Microsoft.Management.Infrastructure.CimFlags]::ReadOnly # this is also specified in Qualifiers
+                if ($flags -eq 0) { $flags = $null}
+
+                $p = [pscustomobject]@{
+                    Name = $property.Name
+                    Value = $property.Value
+                    CimType = $property.CimType
+                    Flags = $flags
+                    ReferenceClassName = $property.ReferenceClassName
+                    Qualifiers = $qualifiers
+                }
+
+                # remove properties that have null value
+                $p.PSobject.Properties | % {if ($_.Value -eq $null) {$p.PSobject.Properties.Remove($_.Name)}}
+
+                $properties.Add($p);
+            }
+            else
+            {
+                Write-Verbose "Property $($property.Name) is inherited, ignoring it"
+            }
+        }
+
+        if ($properties.Count -eq 0) { $properties = $null}
+
+        # construct the processed class
+        $processedClass = [pscustomobject]@{
+            ClassName = $class.CimSystemProperties.ClassName
+            FriendlyName = ($class.CimClassQualifiers | Where-Object {$_.Name -eq "FriendlyName"}).Value
+            ClassVersion = ($class.CimClassQualifiers | Where-Object {$_.Name -eq "ClassVersion"}).Value
+            Description = ($class.CimClassQualifiers | Where-Object {$_.Name -eq "Description"}).Value
+            SuperClassName = $class.CimSuperClassName
+            ClassProperties = $properties
+            }
+
+        # remove properties that have null value
+        $processedClass.PSobject.Properties | % {if ($_.Value -eq $null) {$processedClass.PSobject.Properties.Remove($_.Name)}}
+
+        $resultList.Add($processedClass)
+    }
+
+    return $resultList
+}
+
+###########################################################
+#  ConvertTo-DscJsonSchema
+###########################################################
+
+#
+# Reads CIM MOF schema files and creates json files with equivalent json schema
+#
+function ConvertTo-DscJsonSchema
+{
+    param (
+        [Parameter(ValueFromPipeline = $true, ValueFromPipelineByPropertyName = $true)]
+        [ValidateNotNullOrEmpty()]
+        [Alias("Path")]
+        [string[]]
+        $Directory
+    )
+
+    Process
+    {
+        foreach($dir in $Directory)
+        {
+            Write-Verbose "Processing $dir"
+            if (-not (Test-Path -Path $dir))
+            {
+                Write-Error "Can not find directory $dir" # non-terminating error
+            }
+            else
+            {
+                [Microsoft.PowerShell.DesiredStateConfiguration.Internal.DscClassCache]::Initialize()
+                $schemaFilePaths = Get-ChildItem -Recurse -File -Path $dir -Filter '*.schema.mof'
+
+                foreach($mofPath in $schemaFilePaths)
+                {
+                    $cimClasses = [Microsoft.PowerShell.DesiredStateConfiguration.Internal.DscClassCache]::ReadCimSchemaMof($mofPath)
+                    Write-Verbose "Read $($cimClasses.Count) classes from $mofPath"
+                    $preprocessedCimClasses = PrepareCimClassesForJsonConvertion $cimClasses
+
+                    [string] $jsonPath = $mofPath.FullName.Substring(0, $mofPath.FullName.LastIndexOf('.')) + ".json";
+                    Write-Verbose "Writing $jsonPath"
+                    ConvertTo-Json -InputObject $preprocessedCimClasses -Depth 100 -EnumsAsStrings | Out-File -Force -Path $jsonPath
+                }
+            }
+            
+        }
+    }
+}
+
 ###########################################################
 #  Get-DSCResource
 ###########################################################
 
 #
 # Gets DSC resources on the machine. Allows to filter on a particular resource.
-# It parses all the resources defined in the schema.mof file and also the composite
-# resources defined or imported from PowerShell modules
+# It parses class-based resources defined in the psm1 module files.
 #
 function Get-DscResource
 {
@@ -3919,7 +3931,7 @@ function Get-DscResource
         $keywordErrors = New-Object -TypeName 'System.Collections.ObjectModel.Collection[System.Exception]'
 
         # Load the default Inbox providers (keyword) in cache, also allow caching the resources from multiple versions of modules.
-        [Microsoft.PowerShell.DesiredStateConfiguration.Internal.DscClassCache]::LoadDefaultCimKeywords($keywordErrors, $true)
+        [Microsoft.PowerShell.DesiredStateConfiguration.Internal.CrossPlatform.DscClassCache]::LoadDefaultCimKeywords($keywordErrors, $true)
 
         foreach($ex in $keywordErrors)
         {
@@ -3966,15 +3978,6 @@ function Get-DscResource
             {
                 $null = ImportClassResourcesFromModule -Module $mod -Resources * -functionsToDefine $functionsToDefine
             }
-
-            $dscResources = Join-Path -Path $mod.ModuleBase -ChildPath 'DscResources'
-            if(Test-Path $dscResources)
-            {
-                foreach ($resource in Get-ChildItem -Path $dscResources -Directory -Name)
-                {
-                    $null = ImportCimAndScriptKeywordsFromModule -Module $mod -Resource $resource -functionsToDefine $functionsToDefine
-                }
-            }
         }
 
         $Resources = @()
@@ -4004,7 +4007,7 @@ function Get-DscResource
             Write-Progress -Id 3 -Activity $LocalizedData.CreatingResourceList
 
             # Get resources for CIM cache
-            $keywords = [Microsoft.PowerShell.DesiredStateConfiguration.Internal.DscClassCache]::GetCachedKeywords() | Where-Object -FilterScript {
+            $keywords = [Microsoft.PowerShell.DesiredStateConfiguration.Internal.CrossPlatform.DscClassCache]::GetKeywordsFromCachedClasses() | Where-Object -FilterScript {
                 (!$_.IsReservedKeyword) -and ($null -ne $_.ResourceName) -and !(IsHiddenResource $_.ResourceName) -and (![bool]$Module -or ($_.ImplementingModule -like $ModuleString))
             }
 
@@ -4018,16 +4021,6 @@ function Get-DscResource
                 $_ -ne $null
             }
 
-            # Get composite resources
-            $Resources += Get-Command -CommandType Configuration |
-            ForEach-Object -Process {
-                GetCompositeResource $patterns $_ $ignoreResourceParameters -modules $modules
-            } |
-            Where-Object -FilterScript {
-                $_ -ne $null -and (![bool]$ModuleString -or ($_.Module -like $ModuleString)) -and
-                ($_.Path -and ((Split-Path -Leaf $_.Path) -eq "$($_.Name).schema.psm1"))
-            }
-
             # check whether all resources are found
             CheckResourceFound $Name $Resources
         }
@@ -4036,7 +4029,7 @@ function Get-DscResource
             if ($initialized)
             {
                 [System.Management.Automation.Language.DynamicKeyword]::Reset()
-                [Microsoft.PowerShell.DesiredStateConfiguration.Internal.DscClassCache]::ClearCache()
+                [Microsoft.PowerShell.DesiredStateConfiguration.Internal.CrossPlatform.DscClassCache]::ClearCache()
 
                 $initialized = $false
             }
@@ -4064,7 +4057,7 @@ function Get-DscResource
         if ($initialized)
         {
             [System.Management.Automation.Language.DynamicKeyword]::Reset()
-            [Microsoft.PowerShell.DesiredStateConfiguration.Internal.DscClassCache]::ClearCache()
+            [Microsoft.PowerShell.DesiredStateConfiguration.Internal.CrossPlatform.DscClassCache]::ClearCache()
 
             $initialized = $false
         }
@@ -4117,68 +4110,23 @@ function GetResourceFromKeyword
 
     $resource.Name = $keyword.Keyword
 
-    $schemaFiles = [Microsoft.PowerShell.DesiredStateConfiguration.Internal.DscClassCache]::GetFileDefiningClass($keyword.ResourceName)
+    # only supporting class-based resources at this time
+    $implementationDetail = 'ClassBased'
+    $Module = $modules | Where-Object -FilterScript {
+        $_.Name -eq $keyword.ImplementingModule -and
+        $_.Version -eq $keyword.ImplementingModuleVersion
+    } | Select-Object -First 1
 
-    if ($schemaFiles.Count)
+    if ($Module -and $Module.ExportedDscResources -contains $keyword.Keyword)
     {
-        # Find the correct schema file that matches module name and version
-        # if same module/version is installed in multiple locations, then pick the first schema file.
-        foreach ($schemaFileName in $schemaFiles){
-            $moduleInfo = GetModule $modules $schemaFileName;
-            if ($moduleInfo.Name -eq $keyword.ImplementingModule -and $moduleInfo.Version -eq $keyword.ImplementingModuleVersion){
-                break
-            }
-        }
-
-        # if the class is not a resource we will ignore it except if it is DSC inbox resource.
-        if(-not $schemaFileName.StartsWith("$env:windir\system32\configuration",[stringComparison]::OrdinalIgnoreCase))
-        {
-            $classesFromSchema = [Microsoft.PowerShell.DesiredStateConfiguration.Internal.DscClassCache]::GetCachedClassByFileName($schemaFileName)
-            if($null -ne  $classesFromSchema)
-            {
-                # check if the resource is proper DSC resource that always derives from OMI_BaseResource.
-                $schemaToProcess = $classesFromSchema | ForEach-Object -Process {
-                    if(($_.CimSystemProperties.ClassName -ieq $keyword.ResourceName) -and ($_.CimSuperClassName -ieq 'OMI_BaseResource'))
-                    {
-                        if ([ExperimentalFeature]::IsEnabled("PSDesiredStateConfiguration.InvokeDscResource"))
-                        {
-                            $_ | Add-Member -MemberType NoteProperty -Name 'ImplementationDetail' -Value $implementationDetail -PassThru
-                        }
-                        else
-                        {
-                            $_
-                        }
-                    }
-                }
-                if($null -eq  $schemaToProcess)
-                {
-                    return
-                }
-            }
-        }
-
-        $message = $LocalizedData.SchemaFileForResource -f @($schemaFileName)
-        Write-Verbose -Message $message
-
-        $resource.Module = $moduleInfo
-        $resource.Path = GetImplementingModulePath $schemaFileName
-        $resource.ParentPath = Split-Path $schemaFileName
+        $resource.Module = $Module
+        $resource.Path = $Module.Path
+        $resource.ParentPath = Split-Path -Path $Module.Path
     }
     else
     {
-        $implementationDetail = 'ClassBased'
-        $Module = $modules | Where-Object -FilterScript {
-            $_.Name -eq $keyword.ImplementingModule -and
-            $_.Version -eq $keyword.ImplementingModuleVersion
-        }
-
-        if ($Module -and $Module.ExportedDscResources -contains $keyword.Keyword)
-        {
-            $implementationDetail = 'ClassBased'
-            $resource.Module = $Module
-            $resource.Path = $Module.Path
-            $resource.ParentPath = Split-Path -Path $Module.Path
-        }
+        # a class-based keyword must be in the ExportedDscResources of the module that implements it
+        return $null
     }
 
     if ([system.string]::IsNullOrEmpty($resource.Path) -eq $false)
@@ -4331,7 +4279,6 @@ function AddDscResourceProperty
             $dscProperty.Values.Add($_)
         }
     }
-
     $dscProperty.PropertyType = $Type
     $dscProperty.IsMandatory = $property.Mandatory
 
@@ -4451,13 +4398,13 @@ function GetImplementingModulePath
         $schemaFileName
     )
 
-    $moduleFileName = ($schemaFileName -replace ".schema.mof$", '') + '.psd1'
+    $moduleFileName = ($schemaFileName -replace ".schema.json$", '') + '.psd1'
     if (Test-Path $moduleFileName)
     {
         return $moduleFileName
     }
 
-    $moduleFileName = ($schemaFileName -replace ".schema.mof$", '') + '.psm1'
+    $moduleFileName = ($schemaFileName -replace ".schema.json$", '') + '.psm1'
     if (Test-Path $moduleFileName)
     {
         return $moduleFileName
@@ -4487,9 +4434,9 @@ function GetModule
     }
 
     $schemaFileExt = $null
-    if ($schemaFileName -match '.schema.mof')
+    if ($schemaFileName -match '.schema.json')
     {
-        $schemaFileExt = ".schema.mof$"
+        $schemaFileExt = ".schema.json$"
     }
 
     if ($schemaFileName -match '.schema.psm1')
@@ -4749,29 +4696,29 @@ function Invoke-DscClassBasedResource
 
     Write-Debug "Importing $path ..."
     $iss = [System.Management.Automation.Runspaces.InitialSessionState]::CreateDefault2()
+    # next line prevents PSModulePath from being reset to default
+    $iss.EnvironmentVariables.Add([System.Management.Automation.Runspaces.SessionStateVariableEntry]::new("PSModulePath", $env:PSModulePath, $null))
     $powershell = [PowerShell]::Create($iss)
     $script = @"
 using module $path
-
-Write-Host -Message ([$type]::new | out-string)
-return [$type]::new()
+return [$type]
 "@
 
-
-    $null= $powershell.AddScript($script)
-    $dscType=$powershell.Invoke() | Select-object -First 1
+    $null = $powershell.AddScript($script)
+    $dscType = $powershell.Invoke() | Select-object -First 1
+    Write-Debug "Imported Type: $($dscType | Out-String)"
+    $dscObj = $dscType::new()
     foreach($key in $Property.Keys)
     {
         $value = $Property.$key
         Write-Debug "Setting $key to $value"
-        $dscType.$key = $value
+        $dscObj.$key = $value
     }
-    $info = $dscType | Out-String
-    Write-Debug $info
+    Write-Debug "Object with filled keys: $($dscObj | Out-String)"
 
-    Write-Debug "calling $type.$Method() ..."
+    Write-Debug "Calling $type.$Method() ..."
     $global:DSCMachineStatus = $null
-    $output = $dscType.$Method()
+    $output = $dscObj.$Method()
     return Get-InvokeDscResourceResult -Output $output -Method $Method
 }
 
@@ -4836,6 +4783,7 @@ function Get-InvokeDscResourceResult
 
 Export-ModuleMember -Function @(
         'Invoke-DscResource'
+        'ConvertTo-DscJsonSchema'
     )
 
 ###########################################################

src/PSDesiredStateConfiguration/helpers/DscResourceInfo.psm1

@@ -24,7 +24,7 @@ namespace Microsoft.PowerShell.DesiredStateConfiguration
         /// DSC resource implementation type not known
         /// </summary>
         None = 0,
-        
+
         /// <summary>
         /// DSC resource is implemented using PowerShell module
         /// </summary>
@@ -70,13 +70,13 @@ namespace Microsoft.PowerShell.DesiredStateConfiguration
         public string FriendlyName { get; set; }
 
         /// <summary>
-        /// Gets or sets module which implements the resource. This could point to parent module, if the DSC resource is implemented 
+        /// Gets or sets module which implements the resource. This could point to parent module, if the DSC resource is implemented
         /// by one of nested modules.
         /// </summary>
         public PSModuleInfo Module { get; set; }
 
         /// <summary>
-        /// Gets name of the module which implements the resource. 
+        /// Gets name of the module which implements the resource.
         /// </summary>
         public string ModuleName
         {
@@ -88,7 +88,7 @@ namespace Microsoft.PowerShell.DesiredStateConfiguration
         }
 
         /// <summary>
-        /// Gets version of the module which implements the resource. 
+        /// Gets version of the module which implements the resource.
         /// </summary>
         public Version Version
         {
@@ -100,7 +100,7 @@ namespace Microsoft.PowerShell.DesiredStateConfiguration
         }
 
         /// <summary>
-        /// Gets or sets of the file which implements the resource. For the reosurces which are defined using 
+        /// Gets or sets of the file which implements the resource. For the reosurces which are defined using
         /// MOF file, this will be path to a module which resides in the same folder where schema.mof file is present.
         /// For composite resources, this will be the module which implements the resource
         /// </summary>
@@ -108,7 +108,7 @@ namespace Microsoft.PowerShell.DesiredStateConfiguration
 
         /// <summary>
         /// Gets or sets parent folder, where the resource is defined
-        /// It is the folder containing either the implementing module(=Path) or folder containing ".schema.mof". 
+        /// It is the folder containing either the implementing module(=Path) or folder containing ".schema.mof".
         /// For native providers, Path will be null and only ParentPath will be present.
         /// </summary>
         public string ParentPath { get; set; }
@@ -150,7 +150,7 @@ namespace Microsoft.PowerShell.DesiredStateConfiguration
         {
             this.Values = new List<string>();
         }
-        
+
         /// <summary>
         /// Gets or sets name of the property
         /// </summary>