1 files changed, 109 insertions, 0 deletions
diff --git a/sources/shiboken6/tests/shiboken_paths.py b/sources/shiboken6/tests/shiboken_paths.py
new file mode 100644
index 000000000..3ec940f2e
--- /dev/null
+++ b/sources/shiboken6/tests/shiboken_paths.py
@@ -0,0 +1,109 @@
+# Copyright (C) 2022 The Qt Company Ltd.
+# SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only WITH Qt-GPL-exception-1.0
+
+
+import os
+import sys
+from pathlib import Path
+
+
+def get_dir_env_var(var_name):
+    """Return a directory set by an environment variable"""
+    result = os.environ.get(var_name)
+    if not result:
+        raise ValueError(f'{var_name} is not set!')
+    if not Path(result).is_dir():
+        raise ValueError(f'{result} is not a directory!')
+    return result
+
+
+def get_build_dir():
+    """
+    Return the env var `BUILD_DIR`.
+    If not set (interactive mode), take the last build history entry.
+    """
+    try:
+        return get_dir_env_var('BUILD_DIR')
+    except ValueError:
+        look_for = Path("testing")
+        here = Path(__file__).resolve().parent
+        while here / look_for not in here.iterdir():
+            import pprint
+            parent = here.parent
+            if parent == here:
+                raise SystemError(look_for + " not found!")
+            here = parent
+        try:
+            sys.path.insert(0, os.fspath(here))
+            from testing.buildlog import builds
+            if not builds.history:
+                raise
+            return builds.history[-1].build_dir
+        finally:
+            del sys.path[0]
+
+
+def _prepend_path_var(var_name, paths):
+    """Prepend additional paths to a path environment variable
+       like PATH, LD_LIBRARY_PATH"""
+    old_paths = os.environ.get(var_name)
+    new_paths = os.pathsep.join(paths)
+    if old_paths:
+        new_paths += f'{os.pathsep}{old_paths}'
+    os.environ[var_name] = new_paths
+
+
+def add_python_dirs(python_dirs):
+    """Add directories to the Python path unless present.
+       Care is taken that the added directories come before
+       site-packages."""
+    new_paths = []
+    for python_dir in python_dirs:
+        new_paths.append(python_dir)
+        if python_dir in sys.path:
+            sys.path.remove(python_dir)
+    sys.path[:0] = new_paths
+
+
+def add_lib_dirs(lib_dirs):
+    """Add directories to the platform's library path."""
+    if sys.platform == 'win32':
+        if sys.version_info >= (3, 8, 0):
+            for lib_dir in lib_dirs:
+                os.add_dll_directory(lib_dir)
+        else:
+            _prepend_path_var('PATH', lib_dirs)
+    else:
+        _prepend_path_var('LD_LIBRARY_PATH', lib_dirs)
+
+
+def shiboken_paths(include_shiboken_tests=False):
+    """Return a tuple of python directories/lib directories to be set for
+       using the shiboken6 module from the build directory or running the
+       shiboken tests depending on a single environment variable BUILD_DIR
+       pointing to the build directory."""
+    src_dir = Path(__file__).resolve().parent
+    python_dirs = []
+    if include_shiboken_tests:
+        python_dirs.append(os.fspath(src_dir))  # For shiboken_test_helper
+    python_dirs.append(get_build_dir())  # for toplevel shiboken6 import
+    shiboken_dir = Path(get_build_dir()) / 'shiboken6'
+    lib_dirs = [os.fspath(shiboken_dir / 'libshiboken')]
+    if include_shiboken_tests:
+        shiboken_test_dir = shiboken_dir /'tests'
+        for module in ['minimal', 'sample', 'smart', 'other']:
+            module_dir = shiboken_test_dir / f"{module}binding"
+            python_dirs.append(os.fspath(module_dir))
+            lib_dir = shiboken_test_dir / f"lib{module}"
+            lib_dirs.append(os.fspath(lib_dir))
+    return (python_dirs, lib_dirs)
+
+
+def init_paths():
+    """Sets the correct import paths (Python modules and C++ library
+       paths) for testing shiboken depending on a single
+       environment variable BUILD_DIR pointing to the build
+       directory."""
+    paths = shiboken_paths(True)
+    add_python_dirs(paths[0])
+    add_lib_dirs(paths[1])