Improve regex for fileContextPath (#939)

<!-- CURSOR_SUMMARY -->
> [!NOTE]
> Improve stack-trace path parsing for caller directory and add
JS/Python tests; publish as patch.
> 
> - **Template utils (JS SDK)**:
> - Add `matchFileDir` to robustly extract file directory from
stack-trace lines (handles anonymous frames).
> - Refactor `getCallerDirectory` to use `matchFileDir` for path
parsing.
> - **Tests**:
>   - Add JS tests for `getCallerDirectory` and `matchFileDir`.
>   - Add Python async/sync tests for `get_caller_directory`.
> - **Release**:
>   - Add changeset marking a patch for `e2b`.
> 
> <sup>Written by [Cursor
Bugbot](https://cursor.com/dashboard?tab=bugbot) for commit
6bd8aa7. This will update automatically
on new commits. Configure
[here](https://cursor.com/dashboard?tab=bugbot).</sup>
<!-- /CURSOR_SUMMARY -->

---------

Co-authored-by: Jakub Dobry <jakub.dobry8@gmail.com>

Author: mishushakov

.changeset/metal-horses-peel.md

@@ -0,0 +1,5 @@
+---
+'e2b': patch
+---
+
+regex path for fileContextPath

packages/js-sdk/src/template/utils.ts

@@ -111,6 +111,19 @@ export function getCallerFrame(depth: number): string | undefined {
   return lines.slice(depth).join('\n')
 }
 
+/**
+ * Matches paths like "at <anonymous> (/path/to/file.js:1:1)" or "at /path/to/file.js:1:1"
+ * @param line - The line to match
+ * @returns The directory of the file
+ */
+export function matchFileDir(line: string): string | undefined {
+  const match = line.match(/\/[^:]+/)
+  if (match) {
+    const filePath = match[0]
+    return path.dirname(filePath)
+  }
+}
+
 /**
  * Get the caller directory
  * @returns The caller directory
@@ -125,15 +138,9 @@ export function getCallerDirectory(depth: number): string | undefined {
   if (lines.length === 0) {
     return
   }
-  const firstLine = lines[0]
-
-  const match = firstLine.match(/at ([^:]+):\d+:\d+/)
-  if (match) {
-    const filePath = match[1]
-    return path.dirname(filePath)
-  }
 
-  return
+  const firstLine = lines[0]
+  return matchFileDir(firstLine)
 }
 
 export function padOctal(mode: number): string {

packages/js-sdk/tests/template/utils/getCallerDirectory.test.ts

@@ -0,0 +1,8 @@
+import { expect, test } from 'vitest'
+import { getCallerDirectory } from '../../../src/template/utils'
+
+test('getCallerDirectory', () => {
+  // getCallerDirectory(1) should return the directory of the current file
+  // __dirname is the directory of the current file
+  expect(getCallerDirectory(1)).toBe(__dirname)
+})

packages/js-sdk/tests/template/utils/matchFileDir.test.ts

@@ -0,0 +1,10 @@
+import { expect, test } from 'vitest'
+import { matchFileDir } from '../../../src/template/utils'
+
+test('matchFileDir', () => {
+  expect(matchFileDir('at /path/to/file.js:1:1')).toBe('/path/to')
+})
+
+test('matchFileDir (anonymous)', () => {
+  expect(matchFileDir('at <anonymous> (/path/to/file.js:1:1)')).toBe('/path/to')
+})

packages/python-sdk/tests/async/template_async/utils/test_get_caller_directory.py

@@ -0,0 +1,8 @@
+import pytest
+from e2b.template.utils import get_caller_directory
+import os
+
+
+@pytest.mark.asyncio
+async def test_get_caller_directory():
+    assert get_caller_directory(1) == os.path.dirname(__file__)

packages/python-sdk/tests/sync/template_sync/utils/test_get_caller_directory.py

@@ -0,0 +1,6 @@
+import os
+from e2b.template.utils import get_caller_directory
+
+
+def test_get_caller_directory():
+    assert get_caller_directory(1) == os.path.dirname(__file__)