[lldb-dap] Expose log path in extension settings (llvm#103482)

lldb-dap already supports a log file which can be enabled by setting the
`LLDBDAP_LOG` environment variable. With this commit, the log location
can be set directly through the VS-Code extension settings.

Also, this commit bumps the version number, such that the new VS Code
extension gets published to the Marketplace.

lldb/tools/lldb-dap/package.json

@@ -1,7 +1,7 @@
 {
   "name": "lldb-dap",
   "displayName": "LLDB DAP",
-  "version": "0.2.3",
+  "version": "0.2.4",
   "publisher": "llvm-vs-code-extensions",
   "homepage": "https://lldb.llvm.org",
   "description": "LLDB debugging from VSCode",
@@ -73,6 +73,11 @@
           "scope": "resource",
           "type": "string",
           "description": "The path to the lldb-dap binary."
+        },
+        "lldb-dap.log-path": {
+          "scope": "resource",
+          "type": "string",
+          "description": "The log path for lldb-dap (if any)"
         }
       }
     },

lldb/tools/lldb-dap/src-ts/extension.ts

@@ -14,13 +14,29 @@ function createDefaultLLDBDapOptions(): LLDBDapOptions {
       session: vscode.DebugSession,
       packageJSONExecutable: vscode.DebugAdapterExecutable | undefined,
     ): Promise<vscode.DebugAdapterExecutable | undefined> {
-      const path = vscode.workspace
-        .getConfiguration("lldb-dap", session.workspaceFolder)
-        .get<string>("executable-path");
+      const config = vscode.workspace
+        .getConfiguration("lldb-dap", session.workspaceFolder);
+      const path = config.get<string>("executable-path");
+      const log_path = config.get<string>("log-path");
+
+      let env : { [key: string]: string } = {};
+      if (log_path) {
+        env["LLDBDAP_LOG"] = log_path;
+      }
+
       if (path) {
-        return new vscode.DebugAdapterExecutable(path, []);
+        return new vscode.DebugAdapterExecutable(path, [], {env});
+      } else if (packageJSONExecutable) {
+        return new vscode.DebugAdapterExecutable(packageJSONExecutable.command, packageJSONExecutable.args, {
+          ...packageJSONExecutable.options,
+          env: {
+            ...packageJSONExecutable.options?.env,
+            ...env
+          }
+        });
+      } else {
+        return undefined;
       }
-      return packageJSONExecutable;
     },
   };
 }