fix: escaped regex chars in pattern

Closes #1600

Signed-off-by: Akos Kitta <a.kitta@arduino.cc>

arduino-ide-extension/src/electron-main/theia/electron-main-application.ts

@@ -27,7 +27,6 @@ import {
   CLOSE_PLOTTER_WINDOW,
   SHOW_PLOTTER_WINDOW,
 } from '../../common/ipc-communication';
-import isValidPath = require('is-valid-path');
 import { ErrnoException } from '../../node/utils/errors';
 
 app.commandLine.appendSwitch('disable-http-cache');
@@ -206,9 +205,6 @@ export class ElectronMainApplication extends TheiaElectronMainApplication {
     maybePath: string,
     cwd: string
   ): Promise<string | undefined> {
-    if (!isValidPath(maybePath)) {
-      return undefined;
-    }
     if (isAbsolute(maybePath)) {
       return maybePath;
     }

arduino-ide-extension/src/node/sketches-service-impl.ts

@@ -26,6 +26,7 @@ import {
   LoadSketchRequest,
 } from './cli-protocol/cc/arduino/cli/commands/v1/commands_pb';
 import { Deferred } from '@theia/core/lib/common/promise-util';
+import { escapeRegExpCharacters } from '@theia/core/lib/common/strings';
 import { ServiceError } from './service-error';
 import {
   IsTempSketch,
@@ -158,7 +159,7 @@ export class SketchesServiceImpl
       const sketchName = segments[segments.length - 2];
       const sketchFilename = segments[segments.length - 1];
       const sketchFileExtension = segments[segments.length - 1].replace(
-        new RegExp(sketchName),
+        new RegExp(escapeRegExpCharacters(sketchName)),
         ''
       );
       if (sketchFileExtension !== '.ino' && sketchFileExtension !== '.pde') {
@@ -746,10 +747,12 @@ async function isInvalidSketchNameError(
     if (ino) {
       const sketchFolderPath = path.dirname(requestSketchPath);
       const sketchName = path.basename(sketchFolderPath);
-      const pattern = `${invalidSketchNameErrorRegExpPrefix}${path.join(
-        sketchFolderPath,
-        `${sketchName}.ino`
-      )}`.replace(/\\/g, '\\\\'); // make windows path separator with \\ to have a valid regexp.
+      const pattern = escapeRegExpCharacters(
+        `${invalidSketchNameErrorRegExpPrefix}${path.join(
+          sketchFolderPath,
+          `${sketchName}.ino`
+        )}`
+      );
       if (new RegExp(pattern, 'i').test(cliErr.details)) {
         try {
           await fs.access(requestSketchPath);