Extension does not work on Windows

[kaby76]

Extension does not work on Windows

[kaby76]

This change fixes at least the "absolute path" problem (ignore Log.debug() calls).

--- a/src/backend/facade.ts
+++ b/src/backend/facade.ts
@@ -7,6 +7,7 @@ import * as fs from "fs";
 import * as path from "path";

 import { Vocabulary } from "antlr4ng";
+import { Log } from "../frontend/Log.js";

 export interface IContextEntry {
     context: SourceContext;
@@ -85,13 +86,22 @@ export class AntlrFacade {
     }

     public loadGrammar(fileName: string, source?: string): SourceContext {
+Log.debug("LOADGRAMMAR " + fileName);
         let contextEntry = this.sourceContexts.get(fileName);
         if (!contextEntry) {
             if (!source) {
                 try {
-                    fs.statSync(path.join(process.cwd(), fileName));
+                       if (path.isAbsolute(fileName)) {
+                               fs.statSync(fileName);
+                       } else {
+                               fs.statSync(path.join(process.cwd(), fileName));
+                       }
                     source = fs.readFileSync(fileName, "utf8");
+Log.debug("fileName = '" + fileName + "'");
+Log.debug("source = '" + source + "'");
                 } catch (e) {
+Log.debug("CAUGHT LOADGRAMMAR empty");
+Log.debug("fileName = '" + fileName + "'");
                     source = "";
                 }
             }

But, it makes more sense to use the workspace folder rather than current working directory when joining paths.

	let folder = workspace.workspaceFolders ? workspace.workspaceFolders[0] : undefined;
	let folderPath = folder ? folder.uri.fsPath : undefined;

For all practical purposes, for a grammar file like "Test.g4", I cannot get input parameter fileName to be a relative path. It always appears to be an absolute path.

[mike-lischke]

That might be a duplicate of #221. There's a problem with absolute paths, yes. I'll look at that coming weekend.