1 files changed, 51 insertions, 0 deletions
diff --git a/gnu/llvm/libcxx/utils/not.py b/gnu/llvm/libcxx/utils/not.py
new file mode 100644
index 00000000000..2efc8e3cca0
--- /dev/null
+++ b/gnu/llvm/libcxx/utils/not.py
@@ -0,0 +1,51 @@
+#===----------------------------------------------------------------------===##
+#
+# Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+# See https://llvm.org/LICENSE.txt for license information.
+# SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+#
+#===----------------------------------------------------------------------===##
+
+"""not.py is a utility for inverting the return code of commands.
+It acts similar to llvm/utils/not.
+ex: python /path/to/not.py ' echo hello
+    echo $? // (prints 1)
+"""
+
+import subprocess
+import sys
+
+def which_cannot_find_program(prog):
+    # Allow for import errors on distutils.spawn
+    try:
+        import distutils.spawn
+        prog = distutils.spawn.find_executable(prog[0])
+        if prog is None:
+            sys.stderr.write('Failed to find program %s' % prog[0])
+            return True
+        return False
+    except:
+        return False
+
+def main():
+    argv = list(sys.argv)
+    del argv[0]
+    if len(argv) > 0 and argv[0] == '--crash':
+        del argv[0]
+        expectCrash = True
+    else:
+        expectCrash = False
+    if len(argv) == 0:
+        return 1
+    if which_cannot_find_program(argv[0]):
+        return 1
+    rc = subprocess.call(argv)
+    if rc < 0:
+        return 0 if expectCrash else 1
+    if expectCrash:
+        return 1
+    return rc == 0
+
+
+if __name__ == '__main__':
+    exit(main())