Fixed JSON parsing error while selecting toolchain

src/commands.ts

@@ -63,14 +63,15 @@ import { generateSourcekitConfiguration } from "./commands/generateSourcekitConf
 export type WorkspaceContextWithToolchain = WorkspaceContext & { toolchain: SwiftToolchain };
 
 export function registerToolchainCommands(
-    toolchain: SwiftToolchain | undefined
+    toolchain: SwiftToolchain | undefined,
+    cwd?: vscode.Uri
 ): vscode.Disposable[] {
     return [
         vscode.commands.registerCommand("swift.createNewProject", () =>
             createNewProject(toolchain)
         ),
         vscode.commands.registerCommand("swift.selectToolchain", () =>
-            showToolchainSelectionQuickPick(toolchain)
+            showToolchainSelectionQuickPick(toolchain, cwd)
         ),
         vscode.commands.registerCommand("swift.pickProcess", configuration =>
             pickProcess(configuration)

src/extension.ts

@@ -81,7 +81,9 @@ export async function activate(context: vscode.ExtensionContext): Promise<Api> {
 
         context.subscriptions.push(new SwiftEnvironmentVariablesManager(context));
         context.subscriptions.push(SwiftTerminalProfileProvider.register());
-        context.subscriptions.push(...commands.registerToolchainCommands(toolchain));
+        context.subscriptions.push(
+            ...commands.registerToolchainCommands(toolchain, workspaceContext.currentFolder?.folder)
+        );
 
         // Watch for configuration changes the trigger a reload of the extension if necessary.
         context.subscriptions.push(

src/toolchain/swiftly.ts

@@ -20,33 +20,36 @@ import * as vscode from "vscode";
 import { Version } from "../utilities/version";
 import { z } from "zod";
 
-const ListAvailableResult = z.object({
+const ListResult = z.object({
     toolchains: z.array(
         z.object({
             inUse: z.boolean(),
-            installed: z.boolean(),
             isDefault: z.boolean(),
-            name: z.string(),
             version: z.discriminatedUnion("type", [
                 z.object({
-                    major: z.number(),
-                    minor: z.number(),
+                    major: z.number().optional(),
+                    minor: z.number().optional(),
                     patch: z.number().optional(),
+                    name: z.string(),
                     type: z.literal("stable"),
                 }),
                 z.object({
-                    major: z.number(),
-                    minor: z.number(),
+                    major: z.number().optional(),
+                    minor: z.number().optional(),
                     branch: z.string(),
                     date: z.string(),
-
+                    name: z.string(),
                     type: z.literal("snapshot"),
                 }),
             ]),
         })
     ),
 });
 
+const InUseVersionResult = z.object({
+    version: z.string(),
+});
+
 export class Swiftly {
     /**
      * Finds the version of Swiftly installed on the system.
@@ -69,6 +72,27 @@ export class Swiftly {
         }
     }
 
+    /**
+     * Checks if the installed version of Swiftly supports JSON output.
+     *
+     * @returns `true` if JSON output is supported, `false` otherwise.
+     */
+    private static async supportsJsonOutput(
+        outputChannel?: vscode.OutputChannel
+    ): Promise<boolean> {
+        if (!Swiftly.isSupported()) {
+            return false;
+        }
+        try {
+            const { stdout } = await execFile("swiftly", ["--version"]);
+            const version = Version.fromString(stdout.trim());
+            return version?.isGreaterThanOrEqual(new Version(1, 1, 0)) ?? false;
+        } catch (error) {
+            outputChannel?.appendLine(`Failed to check Swiftly JSON support: ${error}`);
+            return false;
+        }
+    }
+
     /**
      * Finds the list of toolchains managed by Swiftly.
      *
@@ -86,7 +110,7 @@ export class Swiftly {
             return [];
         }
 
-        if (version.isLessThan(new Version(1, 1, 0))) {
+        if (!(await Swiftly.supportsJsonOutput(outputChannel))) {
             return await Swiftly.getToolchainInstallLegacy(outputChannel);
         }
 
@@ -97,14 +121,12 @@ export class Swiftly {
         outputChannel?: vscode.OutputChannel
     ): Promise<string[]> {
         try {
-            const { stdout } = await execFile("swiftly", ["list-available", "--format=json"]);
-            const response = ListAvailableResult.parse(JSON.parse(stdout));
-            return response.toolchains.map(t => t.name);
+            const { stdout } = await execFile("swiftly", ["list", "--format=json"]);
+            const response = ListResult.parse(JSON.parse(stdout));
+            return response.toolchains.map(t => t.version.name);
         } catch (error) {
             outputChannel?.appendLine(`Failed to retrieve Swiftly installations: ${error}`);
-            throw new Error(
-                `Failed to retrieve Swiftly installations from disk: ${(error as Error).message}`
-            );
+            return [];
         }
     }
 
@@ -137,13 +159,39 @@ export class Swiftly {
         return process.platform === "linux" || process.platform === "darwin";
     }
 
-    public static async inUseLocation(swiftlyPath: string, cwd?: vscode.Uri) {
+    public static async inUseLocation(swiftlyPath: string = "swiftly", cwd?: vscode.Uri) {
         const { stdout: inUse } = await execFile(swiftlyPath, ["use", "--print-location"], {
             cwd: cwd?.fsPath,
         });
         return inUse.trimEnd();
     }
 
+    public static async inUseVersion(
+        swiftlyPath: string = "swiftly",
+        cwd?: vscode.Uri
+    ): Promise<string | undefined> {
+        if (!this.isSupported()) {
+            throw new Error("Swiftly is not supported on this platform");
+        }
+
+        if (!(await Swiftly.supportsJsonOutput())) {
+            return undefined;
+        }
+
+        const { stdout } = await execFile(swiftlyPath, ["use", "--format=json"], {
+            cwd: cwd?.fsPath,
+        });
+        const result = InUseVersionResult.parse(JSON.parse(stdout));
+        return result.version;
+    }
+
+    public static async use(version: string): Promise<void> {
+        if (!this.isSupported()) {
+            throw new Error("Swiftly is not supported on this platform");
+        }
+        await execFile("swiftly", ["use", version]);
+    }
+
     /**
      * Determine if Swiftly is being used to manage the active toolchain and if so, return
      * the path to the active toolchain.

src/toolchain/toolchain.ts

@@ -112,7 +112,8 @@ export class SwiftToolchain {
         public customSDK?: string,
         public xcTestPath?: string,
         public swiftTestingPath?: string,
-        public swiftPMTestingHelperPath?: string
+        public swiftPMTestingHelperPath?: string,
+        public isSwiftlyManaged: boolean = false // true if this toolchain is managed by Swiftly
     ) {
         this.swiftVersionString = targetInfo.compilerVersion;
     }
@@ -121,7 +122,10 @@ export class SwiftToolchain {
         folder?: vscode.Uri,
         outputChannel?: vscode.OutputChannel
     ): Promise<SwiftToolchain> {
-        const swiftFolderPath = await this.getSwiftFolderPath(folder, outputChannel);
+        const { path: swiftFolderPath, isSwiftlyManaged } = await this.getSwiftFolderPath(
+            folder,
+            outputChannel
+        );
         const toolchainPath = await this.getToolchainPath(swiftFolderPath, folder, outputChannel);
         const targetInfo = await this.getSwiftTargetInfo(
             this._getToolchainExecutable(toolchainPath, "swift")
@@ -159,7 +163,8 @@ export class SwiftToolchain {
             customSDK,
             xcTestPath,
             swiftTestingPath,
-            swiftPMTestingHelperPath
+            swiftPMTestingHelperPath,
+            isSwiftlyManaged
         );
     }
 
@@ -518,7 +523,7 @@ export class SwiftToolchain {
     private static async getSwiftFolderPath(
         cwd?: vscode.Uri,
         outputChannel?: vscode.OutputChannel
-    ): Promise<string> {
+    ): Promise<{ path: string; isSwiftlyManaged: boolean }> {
         try {
             let swift: string;
             if (configuration.path !== "") {
@@ -564,18 +569,24 @@ export class SwiftToolchain {
             }
             // swift may be a symbolic link
             let realSwift = await fs.realpath(swift);
+            let isSwiftlyManaged = false;
+
             if (path.basename(realSwift) === "swiftly") {
                 try {
                     const inUse = await Swiftly.inUseLocation(realSwift, cwd);
                     if (inUse) {
                         realSwift = path.join(inUse, "usr", "bin", "swift");
+                        isSwiftlyManaged = true;
                     }
                 } catch {
                     // Ignore, will fall back to original path
                 }
             }
             const swiftPath = expandFilePathTilde(path.dirname(realSwift));
-            return await this.getSwiftEnvPath(swiftPath);
+            return {
+                path: await this.getSwiftEnvPath(swiftPath),
+                isSwiftlyManaged,
+            };
         } catch (error) {
             outputChannel?.appendLine(`Failed to find swift executable: ${error}`);
             throw Error("Failed to find swift executable");

src/ui/ToolchainSelection.ts

@@ -98,25 +98,27 @@ export async function selectToolchain() {
 }
 
 /** A {@link vscode.QuickPickItem} that contains the path to an installed Swift toolchain */
-type SwiftToolchainItem = PublicSwiftToolchainItem | XcodeToolchainItem;
+type SwiftToolchainItem = PublicSwiftToolchainItem | XcodeToolchainItem | SwiftlyToolchainItem;
 
 /** Common properties for a {@link vscode.QuickPickItem} that represents a Swift toolchain */
 interface BaseSwiftToolchainItem extends vscode.QuickPickItem {
     type: "toolchain";
-    toolchainPath: string;
-    swiftFolderPath: string;
     onDidSelect?(): Promise<void>;
 }
 
 /** A {@link vscode.QuickPickItem} for a Swift toolchain that has been installed manually */
 interface PublicSwiftToolchainItem extends BaseSwiftToolchainItem {
-    category: "public" | "swiftly";
+    category: "public";
+    toolchainPath: string;
+    swiftFolderPath: string;
 }
 
 /** A {@link vscode.QuickPickItem} for a Swift toolchain provided by an installed Xcode application */
 interface XcodeToolchainItem extends BaseSwiftToolchainItem {
     category: "xcode";
     xcodePath: string;
+    toolchainPath: string;
+    swiftFolderPath: string;
 }
 
 /** A {@link vscode.QuickPickItem} that performs an action for the user */
@@ -125,6 +127,11 @@ interface ActionItem extends vscode.QuickPickItem {
     run(): Promise<void>;
 }
 
+interface SwiftlyToolchainItem extends BaseSwiftToolchainItem {
+    category: "swiftly";
+    version: string;
+}
+
 /** A {@link vscode.QuickPickItem} that separates items in the UI */
 class SeparatorItem implements vscode.QuickPickItem {
     readonly type = "separator";
@@ -146,7 +153,8 @@ type SelectToolchainItem = SwiftToolchainItem | ActionItem | SeparatorItem;
  * @returns an array of {@link SelectToolchainItem}
  */
 async function getQuickPickItems(
-    activeToolchain: SwiftToolchain | undefined
+    activeToolchain: SwiftToolchain | undefined,
+    cwd?: vscode.Uri
 ): Promise<SelectToolchainItem[]> {
     // Find any Xcode installations on the system
     const xcodes = (await SwiftToolchain.findXcodeInstalls())
@@ -195,18 +203,43 @@ async function getQuickPickItems(
     // Find any Swift toolchains installed via Swiftly
     const swiftlyToolchains = (await Swiftly.listAvailableToolchains())
         .reverse()
-        .map<SwiftToolchainItem>(toolchainPath => ({
+        .map<SwiftlyToolchainItem>(toolchainPath => ({
             type: "toolchain",
-            category: "swiftly",
             label: path.basename(toolchainPath),
-            detail: toolchainPath,
-            toolchainPath: path.join(toolchainPath, "usr"),
-            swiftFolderPath: path.join(toolchainPath, "usr", "bin"),
+            category: "swiftly",
+            version: path.basename(toolchainPath),
+            onDidSelect: async () => {
+                try {
+                    await Swiftly.use(toolchainPath);
+                    void showReloadExtensionNotification(
+                        "Changing the Swift path requires Visual Studio Code be reloaded."
+                    );
+                } catch (error) {
+                    void vscode.window.showErrorMessage(
+                        `Failed to switch Swiftly toolchain: ${error}`
+                    );
+                }
+            },
         }));
     // Mark which toolchain is being actively used
     if (activeToolchain) {
+        const currentSwiftlyVersion = activeToolchain.isSwiftlyManaged
+            ? await Swiftly.inUseVersion("swiftly", cwd)
+            : undefined;
         const toolchainInUse = [...xcodes, ...toolchains, ...swiftlyToolchains].find(toolchain => {
-            return toolchain.toolchainPath === activeToolchain.toolchainPath;
+            if (currentSwiftlyVersion) {
+                if (toolchain.category !== "swiftly") {
+                    return false;
+                }
+
+                // For Swiftly toolchains, check if the label matches the active toolchain version
+                return currentSwiftlyVersion === toolchain.label;
+            }
+            // For non-Swiftly toolchains, check if the toolchain path matches
+            return (
+                (toolchain as PublicSwiftToolchainItem | XcodeToolchainItem).toolchainPath ===
+                activeToolchain.toolchainPath
+            );
         });
         if (toolchainInUse) {
             toolchainInUse.description = "$(check) in use";
@@ -262,10 +295,13 @@ async function getQuickPickItems(
  *
  * @param activeToolchain the {@link WorkspaceContext}
  */
-export async function showToolchainSelectionQuickPick(activeToolchain: SwiftToolchain | undefined) {
+export async function showToolchainSelectionQuickPick(
+    activeToolchain: SwiftToolchain | undefined,
+    cwd?: vscode.Uri
+) {
     let xcodePaths: string[] = [];
     const selected = await vscode.window.showQuickPick<SelectToolchainItem>(
-        getQuickPickItems(activeToolchain).then(result => {
+        getQuickPickItems(activeToolchain, cwd).then(result => {
             xcodePaths = result
                 .filter((i): i is XcodeToolchainItem => "category" in i && i.category === "xcode")
                 .map(xcode => xcode.xcodePath);
@@ -303,8 +339,23 @@ export async function showToolchainSelectionQuickPick(activeToolchain: SwiftTool
                 });
             }
         }
-        // Update the toolchain path
-        const isUpdated = await setToolchainPath(selected.swiftFolderPath, developerDir);
+        // Update the toolchain path`
+        let swiftPath: string | undefined;
+
+        // Handle Swiftly toolchains specially
+        if (selected.category === "swiftly") {
+            try {
+                swiftPath = undefined;
+            } catch (error) {
+                void vscode.window.showErrorMessage(`Failed to switch Swiftly toolchain: ${error}`);
+                return;
+            }
+        } else {
+            // For non-Swiftly toolchains, use the swiftFolderPath
+            swiftPath = selected.swiftFolderPath;
+        }
+
+        const isUpdated = await setToolchainPath(swiftPath, developerDir);
         if (isUpdated && selected.onDidSelect) {
             await selected.onDidSelect();
         }