Set tracing to always on and save to .repo/TRACE_FILE.

- add `--trace_to_stderr` option so stderr will include trace outputs and any other errors that get sent to stderr
- while TRACE_FILE will only include trace outputs

piggy-backing on: https://gerrit-review.googlesource.com/c/git-repo/+/349154

Change-Id: I3895a84de4b2784f17fac4325521cd5e72e645e2
Reviewed-on: https://gerrit-review.googlesource.com/c/git-repo/+/350114
Reviewed-by: LaMont Jones <lamontjones@google.com>
Tested-by: Joanna Wang <jojwang@google.com>

tests/test_git_config.py

@@ -19,6 +19,7 @@ import tempfile
 import unittest
 
 import git_config
+import repo_trace
 
 
 def fixture(*paths):
@@ -33,9 +34,16 @@ class GitConfigReadOnlyTests(unittest.TestCase):
   def setUp(self):
     """Create a GitConfig object using the test.gitconfig fixture.
     """
+
+    self.tempdirobj = tempfile.TemporaryDirectory(prefix='repo_tests')
+    repo_trace._TRACE_FILE = os.path.join(self.tempdirobj.name, 'TRACE_FILE_from_test')
+
     config_fixture = fixture('test.gitconfig')
     self.config = git_config.GitConfig(config_fixture)
 
+  def tearDown(self):
+    self.tempdirobj.cleanup()
+
   def test_GetString_with_empty_config_values(self):
     """
     Test config entries with no value.
@@ -109,9 +117,15 @@ class GitConfigReadWriteTests(unittest.TestCase):
   """Read/write tests of the GitConfig class."""
 
   def setUp(self):
+    self.tempdirobj = tempfile.TemporaryDirectory(prefix='repo_tests')
+    repo_trace._TRACE_FILE = os.path.join(self.tempdirobj.name, 'TRACE_FILE_from_test')
+
     self.tmpfile = tempfile.NamedTemporaryFile()
     self.config = self.get_config()
 
+  def tearDown(self):
+    self.tempdirobj.cleanup()
+
   def get_config(self):
     """Get a new GitConfig instance."""
     return git_config.GitConfig(self.tmpfile.name)

tests/test_git_superproject.py

@@ -24,6 +24,7 @@ from unittest import mock
 import git_superproject
 import git_trace2_event_log
 import manifest_xml
+import repo_trace
 from test_manifest_xml import sort_attributes
 
 
@@ -39,6 +40,7 @@ class SuperprojectTestCase(unittest.TestCase):
     """Set up superproject every time."""
     self.tempdirobj = tempfile.TemporaryDirectory(prefix='repo_tests')
     self.tempdir = self.tempdirobj.name
+    repo_trace._TRACE_FILE = os.path.join(self.tempdir, 'TRACE_FILE_from_test')
     self.repodir = os.path.join(self.tempdir, '.repo')
     self.manifest_file = os.path.join(
         self.repodir, manifest_xml.MANIFEST_FILE_NAME)

tests/test_manifest_xml.py

@@ -23,6 +23,7 @@ import xml.dom.minidom
 
 import error
 import manifest_xml
+import repo_trace
 
 
 # Invalid paths that we don't want in the filesystem.
@@ -93,6 +94,7 @@ class ManifestParseTestCase(unittest.TestCase):
   def setUp(self):
     self.tempdirobj = tempfile.TemporaryDirectory(prefix='repo_tests')
     self.tempdir = self.tempdirobj.name
+    repo_trace._TRACE_FILE = os.path.join(self.tempdir, 'TRACE_FILE_from_test')
     self.repodir = os.path.join(self.tempdir, '.repo')
     self.manifest_dir = os.path.join(self.repodir, 'manifests')
     self.manifest_file = os.path.join(

tests/test_project.py

@@ -26,6 +26,7 @@ import git_command
 import git_config
 import platform_utils
 import project
+import repo_trace
 
 
 @contextlib.contextmanager
@@ -64,6 +65,13 @@ class FakeProject(object):
 class ReviewableBranchTests(unittest.TestCase):
   """Check ReviewableBranch behavior."""
 
+  def setUp(self):
+    self.tempdirobj = tempfile.TemporaryDirectory(prefix='repo_tests')
+    repo_trace._TRACE_FILE = os.path.join(self.tempdirobj.name, 'TRACE_FILE_from_test')
+
+  def tearDown(self):
+    self.tempdirobj.cleanup()
+
   def test_smoke(self):
     """A quick run through everything."""
     with TempGitTree() as tempdir: