Don't cd if we are in CPython directory (GH-12)

backport/tasks.py

@@ -24,10 +24,14 @@ def setup_cpython_repo():
         f"git remote add upstream https://{os.environ.get('GH_AUTH')}:x-oauth-basic@github.com/python/cpython.git".split())
     print("Finished setting up CPython Repo")
 
+
 @app.task
 def backport_task(commit_hash, branch, *, issue_number, created_by, merged_by):
     """Backport a commit into a branch."""
-    print(os.chdir("./cpython"))
+    if not util.is_cpython_repo():
+        # cd to cpython if we're not already in it
+
+        os.chdir('./cpython')
     cp = cherry_picker.CherryPicker('origin', commit_hash, [branch])
     try:
         cp.backport()

backport/util.py

@@ -1,5 +1,6 @@
 import requests
 import os
+import subprocess
 
 from gidgethub import sansio
 
@@ -26,4 +27,13 @@ def comment_on_pr(issue_number, message):
 
 
 def user_login(item):
-    return item["user"]["login"]
+    return item["user"]["login"]
+
+
+def is_cpython_repo():
+    cmd = "git log -r 7f777ed95a19224294949e1b4ce56bbffcb1fe9f"
+    try:
+        subprocess.check_output(cmd.split(), stderr=subprocess.STDOUT)
+    except subprocess.SubprocessError:
+        return False
+    return True