[CIFuzz] Fix repo detection for repos downloaded through "go get". (#5481)

Superseeds: #5463
Fixes: #3670

infra/base-images/base-builder/detect_repo.py

@@ -107,20 +107,25 @@ def get_repo(repo_path):
   return None
 
 
-def check_for_repo_name(repo_path, repo_name):
-  """Check to see if the repo_name matches the remote repository repo name.
+def check_for_repo_name(repo_path, expected_repo_name):
+  """Returns True if the repo at |repo_path| repo_name matches
+  |expected_repo_name|.
 
   Args:
-    repo_path: The directory of the git repo.
-    repo_name: The name of the target git repo.
+    repo_path: The directory of a git repo.
+    expected_repo_name: The name of the target git repo.
   """
   if not os.path.exists(os.path.join(repo_path, '.git')):
     return False
 
-  out, _ = execute(['git', 'config', '--get', 'remote.origin.url'],
-                   location=repo_path)
-  out = out.split('/')[-1].replace('.git', '').rstrip()
-  return out == repo_name
+  repo_url, _ = execute(['git', 'config', '--get', 'remote.origin.url'],
+                        location=repo_path)
+  # Handle two common cases:
+  # https://github.com/google/syzkaller/
+  # https://github.com/google/syzkaller.git
+  repo_url = repo_url.replace('.git', '').rstrip().rstrip('/')
+  actual_repo_name = repo_url.split('/')[-1]
+  return actual_repo_name == expected_repo_name
 
 
 def check_for_commit(repo_path, commit):

infra/base-images/base-builder/detect_repo_test.py

@@ -23,6 +23,7 @@ import re
 import sys
 import tempfile
 import unittest
+from unittest import mock
 
 import detect_repo
 
@@ -36,6 +37,33 @@ import test_repos
 # pylint: enable=wrong-import-position
 
 
+class TestCheckForRepoName(unittest.TestCase):
+  """Tests for check_for_repo_name."""
+
+  @mock.patch('os.path.exists', return_value=True)
+  @mock.patch('detect_repo.execute',
+              return_value=('https://github.com/google/syzkaller/', None))
+  def test_go_get_style_url(self, _, __):
+    """Tests that check_for_repo_name works on repos that were downloaded using
+    go get."""
+    self.assertTrue(detect_repo.check_for_repo_name('fake-path', 'syzkaller'))
+
+  @mock.patch('os.path.exists', return_value=True)
+  @mock.patch('detect_repo.execute',
+              return_value=('https://github.com/google/syzkaller', None))
+  def test_missing_git_and_slash_url(self, _, __):
+    """Tests that check_for_repo_name works on repos who's URLs do not end in
+    ".git" or "/"."""
+    self.assertTrue(detect_repo.check_for_repo_name('fake-path', 'syzkaller'))
+
+  @mock.patch('os.path.exists', return_value=True)
+  @mock.patch('detect_repo.execute',
+              return_value=('https://github.com/google/syzkaller.git', None))
+  def test_normal_style_repo_url(self, _, __):
+    """Tests that check_for_repo_name works on normally cloned repos."""
+    self.assertTrue(detect_repo.check_for_repo_name('fake-path', 'syzkaller'))
+
+
 @unittest.skipIf(not os.getenv('INTEGRATION_TESTS'),
                  'INTEGRATION_TESTS=1 not set')
 class DetectRepoIntegrationTest(unittest.TestCase):