PowerShell · TylerLeonhardt · Jan 22, 2019 · Jan 19, 2019 · Jan 22, 2019
diff --git a/.github/ISSUE_TEMPLATE/Bug_report.md b/.github/ISSUE_TEMPLATE/Bug_report.md
@@ -13,6 +13,11 @@ IMPORTANT: you can generate a bug report directly from the
 PowerShell extension in Visual Studio Code by selecting
 "PowerShell: Upload Bug Report to GitHub" from the command palette.
 
+NOTE: If you have both stable (aka "PowerShell") and preview (aka "PowerShell Preview") installed,
+you MUST DISABLE one of them for the best performance.
+Docs on how to disable an extension can be found here:
+https://code.visualstudio.com/docs/editor/extension-gallery#_disable-an-extension
+
 The more repro details you can provide, along with a zip
 of the log files from your session, the better the chances
 are for a quick resolution.

diff --git a/README.md b/README.md
@@ -88,8 +88,14 @@ how to use them.
 
 This folder can be found at the following path:
 
+```powershell
+$HOME/.vscode[-insiders]/extensions/ms-vscode.PowerShell-<version>/examples
 ```
-C:\Users\<yourusername>\.vscode\extensions\ms-vscode.PowerShell-<version>\examples
+
+or if you're using the preview version of the extension
+
+ ```powershell
+$HOME/.vscode[-insiders]/extensions/ms-vscode.powershell-preview-<version>/examples
 ```
 
 To open/view the extension's examples in Visual Studio Code, run the following from your PowerShell command prompt:

diff --git a/docs/development.md b/docs/development.md
@@ -44,3 +44,15 @@ press <kbd>Ctrl</kbd>+<kbd>F5</kbd> or <kbd>Cmd</kbd>+<kbd>F5</kbd> on macOS.
 ```
 code --extensionDevelopmentPath="c:\path\to\vscode-powershell" .
 ```
+
+## Building a "Preview" version
+
+To build a preview version of the extension, that is to say,
+a version of the extension named "PowerShell Preview",
+You can simply change the version in the package.json to include `-preview` at the end.
+When you build, this will:
+
+- Add a warning to the top of the README.md to warn users not to have the stable and preview version enabled at the same time
+- Adds "Preview" in a few places in the package.json
+
+This mechanism is mostly used for releases.
diff --git a/docs/troubleshooting.md b/docs/troubleshooting.md
@@ -34,6 +34,11 @@ and you can ask for new features [in their repository](https://github.com/Micros
 
 ## Known Issues in the Extension
 
+- If you are running the Preview version "PowerShell Preview" side-by-side with the stable version "PowerShell"
+  you will experience performance and debug issues.
+  This is expected until VSCode offers extension channels - [vscode#15756](https://github.com/Microsoft/vscode/issues/15756)
+  - You MUST [DISABLE](https://code.visualstudio.com/docs/editor/extension-gallery#_disable-an-extension) one of them for the best performance.
+    Docs on how to disable an extension can be found [here](https://code.visualstudio.com/docs/editor/extension-gallery#_disable-an-extension)
 - Highlighting/completions/command history don't work as I expect in the
   Integrated Console - [#535]
   - The Integrated Console implements a [custom host]
@@ -157,6 +162,12 @@ Logs provide context for what was happening when the issue occurred
   $HOME/.vscode[-insiders]/extensions/ms-vscode.powershell-<version>/logs/
   ```
 
+  or if you're using the preview version of the extension
+
+  ```powershell
+  $HOME/.vscode[-insiders]/extensions/ms-vscode.powershell-preview-<version>/logs/
+  ```
+
   For example:
 
   ```powershell

diff --git a/src/features/GenerateBugReport.ts b/src/features/GenerateBugReport.ts
@@ -9,8 +9,6 @@ import { IFeature, LanguageClient } from "../feature";
 import { SessionManager } from "../session";
 import Settings = require("../settings");
 
-const extensionId: string = "ms-vscode.PowerShell";
-const extensionVersion: string = vscode.extensions.getExtension(extensionId).packageJSON.version;
 const queryStringPrefix: string = "?";
 
 const settings = Settings.load();
@@ -54,7 +52,7 @@ capturing and sending logs.
 | --- | --- |
 | Operating System | ${os.type()} ${os.arch()} ${os.release()} |
 | VSCode | ${vscode.version}|
-| PowerShell Extension Version | ${extensionVersion} |
+| PowerShell Extension Version | ${sessionManager.HostVersion} |
 
 ### PowerShell Information ###
 

diff --git a/src/main.ts b/src/main.ts
@@ -114,7 +114,9 @@ export function activate(context: vscode.ExtensionContext): void {
     sessionManager =
         new SessionManager(
             requiredEditorServicesVersion,
-            logger, documentSelector);
+            logger,
+            documentSelector,
+            context);
 
     // Create features
     extensionFeatures = [
@@ -152,10 +154,19 @@ function checkForUpdatedVersion(context: vscode.ExtensionContext) {
     const showReleaseNotes = "Show Release Notes";
     const powerShellExtensionVersionKey = "powerShellExtensionVersion";
 
+    const extensionName = context.storagePath.toLowerCase().includes("ms-vscode.powershell-preview") ?
+        "ms-vscode.PowerShell-Preview" : "ms-vscode.PowerShell";
+
+    if (extensionName === "ms-vscode.PowerShell-Preview"
+        && vscode.extensions.getExtension("ms-vscode.PowerShell")) {
+        vscode.window.showWarningMessage(
+            "'PowerShell' and 'PowerShell Preview' are both enabled. Please disable one for best performance.");
+    }
+
     const extensionVersion: string =
         vscode
             .extensions
-            .getExtension("ms-vscode.PowerShell")
+            .getExtension(extensionName)
             .packageJSON
             .version;
 

diff --git a/src/session.ts b/src/session.ts
@@ -36,10 +36,9 @@ export enum SessionStatus {
 }
 
 export class SessionManager implements Middleware {
+    public HostVersion: string;
 
     private ShowSessionMenuCommandName = "PowerShell.ShowSessionMenu";
-
-    private hostVersion: string;
     private editorServicesArgs: string;
     private powerShellExePath: string = "";
     private sessionStatus: SessionStatus = SessionStatus.NeverStarted;
@@ -66,15 +65,18 @@ export class SessionManager implements Middleware {
     constructor(
         private requiredEditorServicesVersion: string,
         private log: Logger,
-        private documentSelector: DocumentSelector) {
+        private documentSelector: DocumentSelector,
+        private context: vscode.ExtensionContext) {
 
         this.platformDetails = getPlatformDetails();
+        const extensionName = context.storagePath.toLowerCase().includes("ms-vscode.powershell-preview") ?
+            "ms-vscode.PowerShell-Preview" : "ms-vscode.PowerShell";
 
         // Get the current version of this extension
-        this.hostVersion =
+        this.HostVersion =
             vscode
                 .extensions
-                .getExtension("ms-vscode.PowerShell")
+                .getExtension(extensionName)
                 .packageJSON
                 .version;
 
@@ -83,13 +85,13 @@ export class SessionManager implements Middleware {
 
         this.log.write(
             `Visual Studio Code v${vscode.version} ${procBitness}`,
-            `PowerShell Extension v${this.hostVersion}`,
+            `PowerShell Extension v${this.HostVersion}`,
             `Operating System: ${OperatingSystem[this.platformDetails.operatingSystem]} ${osBitness}`);
 
         // Fix the host version so that PowerShell can consume it.
         // This is needed when the extension uses a prerelease
         // version string like 0.9.1-insiders-1234.
-        this.hostVersion = this.hostVersion.split("-")[0];
+        this.HostVersion = this.HostVersion.split("-")[0];
 
         this.registerCommands();
     }
@@ -169,7 +171,7 @@ export class SessionManager implements Middleware {
             this.editorServicesArgs =
                 `-HostName 'Visual Studio Code Host' ` +
                 `-HostProfileId 'Microsoft.VSCode' ` +
-                `-HostVersion '${this.hostVersion}' ` +
+                `-HostVersion '${this.HostVersion}' ` +
                 `-AdditionalModules @('PowerShellEditorServices.VSCode') ` +
                 `-BundledModulesPath '${PowerShellProcess.escapeSingleQuotes(this.bundledModulesPath)}' ` +
                 `-EnableConsoleRepl `;

diff --git a/tools/releaseBuild/Image/build.ps1 b/tools/releaseBuild/Image/build.ps1
@@ -9,5 +9,5 @@ else {
     }
 }
 push-location C:/vscode-powershell
-Invoke-Build GetExtensionVersion,Clean,Build,Test,Package
+Invoke-Build GetExtensionData,Clean,Build,Test,CheckPreview,Package
 Copy-Item -Verbose -Recurse "C:/vscode-powershell/PowerShell-insiders.vsix" "${target}/PowerShell-insiders.vsix"
diff --git a/vscode-powershell.build.ps1 b/vscode-powershell.build.ps1
@@ -13,8 +13,9 @@ $script:IsPullRequestBuild =
     $env:APPVEYOR_PULL_REQUEST_NUMBER -and
     $env:APPVEYOR_REPO_BRANCH -eq "develop"
 
-task GetExtensionVersion -Before Package {
+task GetExtensionData -Before Package {
 
+    $script:PackageJson = Get-Content -Raw $PSScriptRoot/package.json | ConvertFrom-Json
     $updateVersion = $false
     $script:ExtensionVersion = `
         if ($env:AppVeyor) {
@@ -26,14 +27,15 @@ task GetExtensionVersion -Before Package {
             $env:VSTS_BUILD_VERSION
         }
         else {
-            exec { & npm version | ConvertFrom-Json | ForEach-Object { $_.PowerShell } }
+            $script:PackageJson.version
         }
 
-    Write-Host "`n### Extension Version: $script:ExtensionVersion`n" -ForegroundColor Green
-
     if ($updateVersion) {
         exec { & npm version $script:ExtensionVersion --no-git-tag-version --allow-same-version }
     }
+
+    $script:ExtensionName = $script:PackageJson.name
+    Write-Host "`n### Extension Version: $script:ExtensionVersion Extension Name: $script:ExtensionName`n" -ForegroundColor Green
 }
 
 task ResolveEditorServicesPath -Before CleanEditorServices, BuildEditorServices, Package {
@@ -109,6 +111,32 @@ task Test Build, {
     }
 }
 
+task CheckPreview -If { $script:ExtensionVersion -like "*preview*" } `
+    UpdateReadme, UpdatePackageJson
+
+task UpdateReadme {
+    $newReadmeTop = '# PowerShell Language Support for Visual Studio Code
+
+> ## ATTENTION: This is the PREVIEW version of the PowerShell extension for VSCode which contains features that are being evaluated for stable. It works with PowerShell 5.1 and up.
+> ### If you are looking for the stable version, please [go here](https://marketplace.visualstudio.com/items?itemName=ms-vscode.PowerShell) or install the extension called "PowerShell" (not "PowerShell Preview")
+> ## NOTE: If you have both stable (aka "PowerShell") and preview (aka "PowerShell Preview") installed, you MUST [DISABLE](https://code.visualstudio.com/docs/editor/extension-gallery#_disable-an-extension) one of them for the best performance. Docs on how to disable an extension can be found [here](https://code.visualstudio.com/docs/editor/extension-gallery#_disable-an-extension)'
+    $readmePath = (Join-Path $PSScriptRoot README.md)
+
+    $readmeContent = Get-Content -Path $readmePath
+    if (!($readmeContent -match "This is the PREVIEW version of the PowerShell extension")) {
+        $readmeContent[0] = $newReadmeTop
+        $readmeContent > $readmePath
+    }
+}
+
+task UpdatePackageJson {
+    $script:PackageJson.name = "PowerShell-Preview"
+    $script:PackageJson.displayName = "PowerShell Preview"
+    $script:PackageJson.description = "(Preview) Develop PowerShell scripts in Visual Studio Code!"
+    $script:ExtensionName = $script:PackageJson.name
+    Set-Content -Path $PSScriptRoot/package.json ($script:PackageJson | ConvertTo-Json -Depth 100)
+}
+
 task Package {
 
     if ($script:psesBuildScriptPath) {
@@ -126,12 +154,12 @@ task Package {
     exec { & node ./node_modules/vsce/out/vsce package }
 
     # Change the package to have a static name for automation purposes
-    Move-Item -Force .\PowerShell-$($script:ExtensionVersion).vsix .\PowerShell-insiders.vsix
+    Move-Item -Force .\$($script:ExtensionName)-$($script:ExtensionVersion).vsix .\PowerShell-insiders.vsix
 }
 
 task UploadArtifacts -If { $env:AppVeyor } {
     Push-AppveyorArtifact .\PowerShell-insiders.vsix
 }
 
 # The default task is to run the entire CI build
-task . GetExtensionVersion, CleanAll, BuildAll, Test, Package, UploadArtifacts
+task . GetExtensionData, CleanAll, BuildAll, Test, CheckPreview, Package, UploadArtifacts