pass URIs to the companion extension

Author: davidbarsky

editors/code/src/ctx.ts

@@ -190,8 +190,11 @@ export class Ctx implements RustAnalyzerExtensionApi {
             if (this.config.discoverProjectRunner) {
                 const command = `${this.config.discoverProjectRunner}.discoverWorkspaceCommand`;
                 log.info(`running command: ${command}`);
-                const project: JsonProject = await vscode.commands.executeCommand(command);
-                this.setWorkspaces([project]);
+                const uris = vscode.workspace.textDocuments
+                    .filter(isRustDocument)
+                    .map((document) => document.uri);
+                const projects: JsonProject[] = await vscode.commands.executeCommand(command, uris);
+                this.setWorkspaces(projects);
             }
 
             if (this.workspace.kind === "Detached Files") {