Fixes

gulpfile.js

@@ -39,18 +39,19 @@ gulp.task('compileCore', (done) => {
         .on('finish', () => (failed ? done(new Error('TypeScript compilation errors')) : done()));
 });
 
-const apiTsProject = ts.createProject('./pythonExtensionApi/tsconfig.json', { typescript });
-
 gulp.task('compileApi', (done) => {
-    let failed = false;
-    apiTsProject
-        .src()
-        .pipe(apiTsProject())
-        .on('error', () => {
-            failed = true;
+    spawnAsync('npm', ['run', 'compileApi'], undefined, true)
+        .then((stdout) => {
+            if (stdout.includes('error')) {
+                done(new Error(stdout));
+            } else {
+                done();
+            }
         })
-        .js.pipe(gulp.dest('./pythonExtensionApi/out'))
-        .on('finish', () => (failed ? done(new Error('TypeScript compilation errors')) : done()));
+        .catch((ex) => {
+            console.log(ex);
+            done(new Error('TypeScript compilation errors', ex));
+        });
 });
 
 gulp.task('compile', gulp.series('compileCore', 'compileApi'));

package.json

@@ -2070,6 +2070,7 @@
         "package": "gulp clean && gulp prePublishBundle && vsce package -o ms-python-insiders.vsix",
         "prePublish": "gulp clean && gulp prePublishNonBundle",
         "compile": "tsc -watch -p ./",
+        "compileApi": "node ./node_modules/typescript/lib/tsc.js -b ./pythonExtensionApi/tsconfig.json",
         "compiled": "deemon npm run compile",
         "kill-compiled": "deemon --kill npm run compile",
         "checkDependencies": "gulp checkDependencies",
@@ -2189,7 +2190,7 @@
         "flat": "^5.0.2",
         "get-port": "^5.1.1",
         "gulp": "^4.0.0",
-        "gulp-typescript": "^5.0.0",
+        "gulp-typescript": "^6.0.0-alpha.1",
         "mocha": "^9.2.2",
         "mocha-junit-reporter": "^2.0.2",
         "mocha-multi-reporters": "^1.1.7",