https://github.com/edwardgeorge/virtualenv-clone/issues/83
https://github.com/edwardgeorge/virtualenv-clone/pull/84

From d5f6e1fead9bff210a1a1c4f92c80d48db807165 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Miro=20Hron=C4=8Dok?= <miro@hroncok.cz>
Date: Fri, 6 Mar 2026 16:24:20 +0100
Subject: [PATCH] Amend the virtualenv path in pyvenv.cfg command

https://github.com/pypa/virtualenv/commit/44b7bd6d103bdc19860b0ca05c238171c6283008

Without this, test_clone_contents fails with virtualenv 20.38.0+:

                    with open(file_in_clone, 'rb') as f:
                        lines = f.read().decode('utf-8')
    >                   assert venv_path not in lines,\
                            'Found source path in cloned file %s' % file_in_clone
    E                   AssertionError: Found source path in cloned file /tmp/tmp_lsp66c7/clone_venv/pyvenv.cfg
    E                   assert '/tmp/tmp_lsp66c7/srs_venv' not in 'home = /usr/bin\nimplementation = CPython\nversion_info = 3.14.3.final.0\nversion = 3.14.3\nexecutable = /usr/bin/python3.14\ncommand = /.../virtualenv-clone/.tox/py314/bin/python3 -m virtualenv /tmp/tmp_lsp66c7/srs_venv\nvirtualenv = 21.1.0\ninclude-system-site-packages = false\nbase-prefix = /usr\nbase-exec-prefix = /usr\nbase-executable = /usr/bin/python3.14\n'
    E
    E                     '/tmp/tmp_lsp66c7/srs_venv' is contained here:
    E                       home = /usr/bin
    E                       implementation = CPython
    E                       version_info = 3.14.3.final.0
    E                       version = 3.14.3
    E                       executable = /usr/bin/python3.14
    E                       command = /.../virtualenv-clone/.tox/py314/bin/python3 -m virtualenv /tmp/tmp_lsp66c7/srs_venv
    E                     ?                                                                                                   +++++++++++++++++++++++++
    E                       virtualenv = 21.1.0
    E                       include-system-site-packages = false
    E                       base-prefix = /usr
    E                       base-exec-prefix = /usr
    E                       base-executable = /usr/bin/python3.14

Fixes https://github.com/edwardgeorge/virtualenv-clone/issues/83
--- a/clonevirtualenv.py
+++ b/clonevirtualenv.py
@@ -77,6 +77,7 @@ def clone_virtualenv(src_dir, dst_dir):
     version, sys_path = _virtualenv_sys(dst_dir)
     logger.info('fixing scripts in bin...')
     fixup_scripts(src_dir, dst_dir, version)
+    fixup_pyvenv_cfg(src_dir, dst_dir)
 
     has_old = lambda s: any(i for i in s if _dirmatch(i, src_dir))
 
@@ -132,6 +133,23 @@ def fixup_scripts(old_dir, new_dir, version, rewrite_env_python=False):
                 rewrite_env_python=rewrite_env_python)
 
 
+def fixup_pyvenv_cfg(old_dir, new_dir):
+    filename = os.path.join(new_dir, 'pyvenv.cfg')
+    if not os.path.exists(filename):
+        return
+    with open(filename, 'rb') as f:
+        original = f.read()
+    replaced = original.replace(
+        old_dir.encode('utf-8'),
+        new_dir.encode('utf-8')
+    )
+    if original == replaced:
+        return
+    logger.info('fixing pyvenv.cfg...')
+    with open(filename, 'wb') as f:
+        f.write(replaced)
+
+
 def fixup_script_(root, file_, old_dir, new_dir, version,
                   rewrite_env_python=False):
     old_shebang = '#!%s/bin/python' % os.path.normcase(os.path.abspath(old_dir))