Merge branch 'master' into 2020-06-11-raise-from

1 files changed, 77 insertions, 0 deletions

diff --git a/setuptools/_distutils/tests/py35compat.py b/setuptools/_distutils/tests/py35compat.py
new file mode 100644
index 00000000..0c755261
--- /dev/null
+++ b/setuptools/_distutils/tests/py35compat.py
@@ -0,0 +1,77 @@
+"""
+Backward compatibility support for Python 3.5
+"""
+
+import sys
+import test.support
+import subprocess
+
+
+# copied from Python 3.9 test.support module
+def _missing_compiler_executable(cmd_names=[]):
+    """Check if the compiler components used to build the interpreter exist.
+
+    Check for the existence of the compiler executables whose names are listed
+    in 'cmd_names' or all the compiler executables when 'cmd_names' is empty
+    and return the first missing executable or None when none is found
+    missing.
+
+    """
+    from distutils import ccompiler, sysconfig, spawn
+    compiler = ccompiler.new_compiler()
+    sysconfig.customize_compiler(compiler)
+    for name in compiler.executables:
+        if cmd_names and name not in cmd_names:
+            continue
+        cmd = getattr(compiler, name)
+        if cmd_names:
+            assert cmd is not None, \
+                    "the '%s' executable is not configured" % name
+        elif not cmd:
+            continue
+        if spawn.find_executable(cmd[0]) is None:
+            return cmd[0]
+
+
+missing_compiler_executable = vars(test.support).setdefault(
+    'missing_compiler_executable',
+    _missing_compiler_executable,
+)
+
+
+try:
+    from test.support import unix_shell
+except ImportError:
+    # Adapted from Python 3.9 test.support module
+    is_android = hasattr(sys, 'getandroidapilevel')
+    unix_shell = (
+        None if sys.platform == 'win32' else
+        '/system/bin/sh' if is_android else
+        '/bin/sh'
+    )
+
+
+# copied from Python 3.9 subprocess module
+def _optim_args_from_interpreter_flags():
+    """Return a list of command-line arguments reproducing the current
+    optimization settings in sys.flags."""
+    args = []
+    value = sys.flags.optimize
+    if value > 0:
+        args.append('-' + 'O' * value)
+    return args
+
+
+vars(subprocess).setdefault(
+    '_optim_args_from_interpreter_flags',
+    _optim_args_from_interpreter_flags,
+)
+
+
+def adapt_glob(regex):
+    """
+    Supply legacy expectation on Python 3.5
+    """
+    if sys.version_info > (3, 6):
+        return regex
+    return regex.replace('(?s:', '').replace(r')\Z', r'\Z(?ms)')