Remove sync file operation to unblock ext host (microsoft/vscode-pyth…

…on#22997)

For microsoft/vscode-python#22991

extensions/positron-python/src/client/pythonEnvironments/common/environmentManagers/poetry.ts

@@ -10,7 +10,7 @@ import {
     isParentPath,
     pathExists,
     pathExistsSync,
-    readFileSync,
+    readFile,
     shellExecute,
 } from '../externalDependencies';
 import { getEnvironmentDirFromPath } from '../commonUtils';
@@ -63,7 +63,7 @@ async function isLocalPoetryEnvironment(interpreterPath: string): Promise<boolea
         return false;
     }
     const project = path.dirname(envDir);
-    if (!hasValidPyprojectToml(project)) {
+    if (!(await hasValidPyprojectToml(project))) {
         return false;
     }
     // The assumption is that we need to be able to run poetry CLI for an environment in order to mark it as poetry.
@@ -126,7 +126,7 @@ export class Poetry {
      */
     public static async getPoetry(cwd: string): Promise<Poetry | undefined> {
         // Following check should be performed synchronously so we trigger poetry execution as soon as possible.
-        if (!hasValidPyprojectToml(cwd)) {
+        if (!(await hasValidPyprojectToml(cwd))) {
             // This check is not expensive and may change during a session, so we need not cache it.
             return undefined;
         }
@@ -325,12 +325,12 @@ export async function isPoetryEnvironmentRelatedToFolder(
  *
  * @param folder Folder to look for pyproject.toml file in.
  */
-function hasValidPyprojectToml(folder: string): boolean {
+async function hasValidPyprojectToml(folder: string): Promise<boolean> {
     const pyprojectToml = path.join(folder, 'pyproject.toml');
     if (!pathExistsSync(pyprojectToml)) {
         return false;
     }
-    const content = readFileSync(pyprojectToml);
+    const content = await readFile(pyprojectToml);
     if (!content.includes('[tool.poetry]')) {
         return false;
     }