gh-109615: Fix test_tools.test_freeze SRCDIR (#109935)

Fix copy_source_tree() function of test_tools.test_freeze:

* Don't copy SRC_DIR/build/ anymore. This directory is modified by
  other tests running in parallel.
* Add test.support.copy_python_src_ignore().
* Use sysconfig to get the source directory.
* Use sysconfig.get_config_var() to get CONFIG_ARGS variable.

1 files changed, 22 insertions, 0 deletions

diff --git a/Lib/test/test_support.py b/Lib/test/test_support.py
index 5b57c5f..af38db5 100644
--- a/Lib/test/test_support.py
+++ b/Lib/test/test_support.py
@@ -7,6 +7,7 @@ import socket
 import stat
 import subprocess
 import sys
+import sysconfig
 import tempfile
 import textwrap
 import unittest
@@ -800,6 +801,27 @@ class TestSupport(unittest.TestCase):
             support.max_memuse = old_max_memuse
             support.real_max_memuse = old_real_max_memuse
 
+    def test_copy_python_src_ignore(self):
+        src_dir = sysconfig.get_config_var('srcdir')
+        src_dir = os.path.abspath(src_dir)
+
+        ignored = {'.git', '__pycache__'}
+
+        # Source code directory
+        names = os.listdir(src_dir)
+        self.assertEqual(support.copy_python_src_ignore(src_dir, names),
+                         ignored | {'build'})
+
+        # Doc/ directory
+        path = os.path.join(src_dir, 'Doc')
+        self.assertEqual(support.copy_python_src_ignore(path, os.listdir(path)),
+                         ignored | {'build', 'venv'})
+
+        # An other directory
+        path = os.path.join(src_dir, 'Objects')
+        self.assertEqual(support.copy_python_src_ignore(path, os.listdir(path)),
+                         ignored)
+
     # XXX -follows a list of untested API
     # make_legacy_pyc
     # is_resource_enabled