ensure we update the driver's cmake (#3491)

* ensure we update the driver's cmake

* update changelog

CHANGELOG.md

@@ -8,6 +8,7 @@ Bug Fixes:
 - Ensure that the output is cleared for `debugTarget` and `launchTarget` [#3489](https://github.com/microsoft/vscode-cmake-tools/issues/3489)
 - Fix the inheritance of the `environment` for CMakePresets. [#3473](https://github.com/microsoft/vscode-cmake-tools/issues/3473)
 - Removed an unnecessary `console.assert` [#3474](https://github.com/microsoft/vscode-cmake-tools/issues/3474)
+- Ensure that, when switching between presets, the CMake executable is modified. [#2791](https://github.com/microsoft/vscode-cmake-tools/issues/2791)
 
 ## 1.16.32
 Improvements:

src/cmakeProject.ts

@@ -285,6 +285,7 @@ export class CMakeProject {
                 await this.resetPresets(drv);
                 return;
             }
+            const priorCMakePath = await this.getCMakePathofProject(); // used for later comparison to determine if we need to update the driver's cmake.
             this._configurePreset.set(expandedConfigurePreset);
             if (previousGenerator && previousGenerator !== expandedConfigurePreset?.generator) {
                 await this.shutDownCMakeDriver();
@@ -294,6 +295,13 @@ export class CMakeProject {
                 try {
                     this.statusMessage.set(localize('reloading.status', 'Reloading...'));
                     await drv.setConfigurePreset(expandedConfigurePreset);
+                    const updatedCMakePath = await this.getCMakePathofProject();
+
+                    // check if we need to update the driver's cmake, if so, update.
+                    if (priorCMakePath !== updatedCMakePath) {
+                        drv.cmake = await this.getCMakeExecutable();
+                    }
+
                     await this.workspaceContext.state.setConfigurePresetName(this.folderName, configurePreset, this.isMultiProjectFolder);
                     this.statusMessage.set(localize('ready.status', 'Ready'));
                 } catch (error: any) {

src/drivers/cmakeDriver.ts

@@ -184,7 +184,7 @@ export abstract class CMakeDriver implements vscode.Disposable {
      * Construct the driver. Concrete instances should provide their own creation
      * routines.
      */
-    protected constructor(public readonly cmake: CMakeExecutable,
+    protected constructor(public cmake: CMakeExecutable,
         readonly config: ConfigurationReader,
         protected sourceDirUnexpanded: string, // The un-expanded original source directory path, where the CMakeLists.txt exists.
         private readonly isMultiProject: boolean,