Added a swiftly step to walkthrough

Author: thePianoKid

assets/walkthrough/images/installSwiftly.png

@@ -0,0 +1,5 @@
+# Install Swiftly 
+
+![Install Swiftly](./images/installSwiftly.png)
+
+A toolchain is the complete set of tools needed to compile and run Swift code. [Swiftly](https://www.swift.org/swiftly/documentation/swiftlydocs/) is a toolchain manager and installer that allows you to switch between different toolchains. If you're familiar with the JS ecosystem, Swiftly is roughly equivalent to [nvm](https://www.nvmnode.com). 

assets/walkthrough/swiftly.md

@@ -109,6 +109,17 @@
               "markdown": "assets/walkthrough/swiftCommands.md"
             }
           },
+          {
+            "id": "installing-toolchains",
+            "title": "Install a Swift toolchain with Swiftly",
+            "description": "[Swiftly](https://www.swift.org/swiftly/documentation/swiftlydocs/) is an open source toolchain manager that was built to install and manage multiple toolchains. \n[Install Swiftly](command:swift.installSwiftly)",
+            "media": {
+              "markdown": "assets/walkthrough/swiftly.md"
+            },
+            "completionEvents": [
+              "onContext:swift.supportsSwiftlyInstall"
+            ]
+          },
           {
             "id": "selecting-toolchain",
             "title": "Select a toolchain",
@@ -363,6 +374,11 @@
         "title": "Select Toolchain...",
         "category": "Swift"
       },
+      {
+        "command": "swift.installSwiftly",
+        "title": "Install Swiftly",
+        "category": "Swift"
+      },
       {
         "command": "swift.installSwiftlyToolchain",
         "title": "Install Swiftly Toolchain...",

package.json

@@ -30,6 +30,7 @@ import { useLocalDependency } from "./commands/dependencies/useLocal";
 import { generateLaunchConfigurations } from "./commands/generateLaunchConfigurations";
 import { generateSourcekitConfiguration } from "./commands/generateSourcekitConfiguration";
 import { insertFunctionComment } from "./commands/insertFunctionComment";
+import { runInstallSwiftly } from "./commands/installSwiftly";
 import { promptToInstallSwiftlyToolchain } from "./commands/installSwiftlyToolchain";
 import { newSwiftFile } from "./commands/newFile";
 import { openDocumentation } from "./commands/openDocumentation";
@@ -117,6 +118,7 @@ export enum Commands {
     OPEN_MANIFEST = "swift.openManifest",
     RESTART_LSP = "swift.restartLSPServer",
     SELECT_TOOLCHAIN = "swift.selectToolchain",
+    INSTALL_SWIFTLY = "swift.installSwiftly",
     INSTALL_SWIFTLY_TOOLCHAIN = "swift.installSwiftlyToolchain",
     INSTALL_SWIFTLY_SNAPSHOT_TOOLCHAIN = "swift.installSwiftlySnapshotToolchain",
     GENERATE_SOURCEKIT_CONFIG = "swift.generateSourcekitConfiguration",
@@ -367,6 +369,10 @@ export function register(ctx: WorkspaceContext): vscode.Disposable[] {
                     "@ext:swiftlang.swift-vscode "
                 )
         ),
+        vscode.commands.registerCommand(
+            Commands.INSTALL_SWIFTLY,
+            async () => await runInstallSwiftly(ctx?.logger)
+        ),
         vscode.commands.registerCommand(
             Commands.INSTALL_SWIFTLY_TOOLCHAIN,
             async () => await promptToInstallSwiftlyToolchain(ctx, "stable")

src/commands.ts

@@ -113,6 +113,36 @@ async function promptToRestartVSCode(): Promise<void> {
     }
 }
 
+export async function runInstallSwiftly(logger?: SwiftLogger): Promise<boolean> {
+    const confirmation = await vscode.window.showInformationMessage(
+        "Install Swiftly - The Swift Toolchain Version Manager",
+        {
+            modal: true,
+            detail: `The Swift extension is going to install the swiftly toolchain manager on your behalf.
+
+This process involves updating your shell profile in order to add swiftly to your PATH. Alternatively, you can also install swiftly yourself using the instructions at swift.org to customize the installation options.`,
+        },
+        "Continue",
+        "Open Swiftly Documentation"
+    );
+
+    if (confirmation === "Continue") {
+        if (!(await installSwiftlyWithProgress(logger))) {
+            return false;
+        }
+        await promptToRestartVSCode();
+        return true;
+    }
+
+    if (confirmation === "Open Swiftly Documentation") {
+        void vscode.env.openExternal(
+            vscode.Uri.parse("https://www.swift.org/swiftly/documentation/swiftly/getting-started")
+        );
+    }
+
+    return false;
+}
+
 /**
  * Main function to handle missing Swiftly detection and installation
  * @param swiftVersionFiles A list of swift version files that will need to be installed