Support resolution of VS Code predefined variables in settings.

Signed-off-by: Roland Grunberg <rgrunber@redhat.com>

Author: rgrunber

package-lock.json

@@ -1989,7 +1989,8 @@
     "vscode-languageclient": "8.2.0-next.3",
     "winreg-utf8": "^0.1.1",
     "winston": "^3.2.1",
-    "winston-daily-rotate-file": "^4.7.1"
+    "winston-daily-rotate-file": "^4.7.1",
+    "vscode-variables": "^1.0.1"
   },
   "overrides": {
     "vscode-languageserver-protocol": "3.17.6-next.1"

package.json

@@ -11,7 +11,7 @@ import { logger } from './log';
 import { addLombokParam, isLombokSupportEnabled } from './lombokSupport';
 import { RequirementsData } from './requirements';
 import { IS_WORKSPACE_VMARGS_ALLOWED, getJavaEncoding, getJavaagentFlag, getKey, isInWorkspaceFolder } from './settings';
-import { deleteDirectory, ensureExists, getJavaConfiguration, getTimestamp, getVersion } from './utils';
+import { deleteDirectory, ensureExists, getJavaConfiguration, getTimestamp, getVersion, getVSCodeVariablesMap } from './utils';
 import { log } from 'console';
 
 // eslint-disable-next-line no-var
@@ -39,7 +39,7 @@ const DEPENDENCY_COLLECTOR_IMPL_BF= 'bf';
 export function prepareExecutable(requirements: RequirementsData, workspacePath, context: ExtensionContext, isSyntaxServer: boolean): Executable {
 	const executable: Executable = Object.create(null);
 	const options: ExecutableOptions = Object.create(null);
-	options.env = Object.assign({ syntaxserver : isSyntaxServer }, process.env);
+	options.env = Object.assign({ syntaxserver: isSyntaxServer }, process.env, getVSCodeVariablesMap());
 	if (os.platform() === 'win32') {
 		const vmargs = getJavaConfiguration().get('jdt.ls.vmargs', '');
 		const watchParentProcess = '-DwatchParentProcess=false';

src/javaServerStarter.ts

@@ -6,6 +6,7 @@ import { workspace, WorkspaceConfiguration, commands, Uri, version } from 'vscod
 import { Commands } from './commands';
 import { IJavaRuntime } from 'jdk-utils';
 import { getSupportedJreNames, listJdks, sortJdksBySource, sortJdksByVersion } from './jdkUtils';
+const vscodeVariables = require('vscode-variables');
 
 export function getJavaConfiguration(): WorkspaceConfiguration {
 	return workspace.getConfiguration('java');
@@ -347,3 +348,12 @@ export function getVersion(extensionPath: string): string {
 
 	return '0.0.0';
 }
+
+export function getVSCodeVariablesMap(): any {
+	const keys = [
+		"userHome", "workspaceFolder", "workspaceFolderBasename"
+	];
+	const res = {};
+	keys.forEach(key => res[key] = vscodeVariables(`\${${key}}`));
+	return res;
+}