[llvm] [llvm][llvm-lit] Add option to create unique result file names if results already exist (PR #112729)

[James Henderson via llvm-commits]

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@@ -14,11 +16,43 @@ def by_suite_and_test_path(test):
     return (test.suite.name, id(test.suite), test.path_in_suite)
 
 
-class JsonReport(object):
+class Report(object):
     def __init__(self, output_file):
         self.output_file = output_file
+        # Set by the option parser later.
+        self.use_unique_output_file_name = False
 
     def write_results(self, tests, elapsed):
+        if self.use_unique_output_file_name:
+            file = None
+            filepath = self.output_file
+            attempt = 0
+            while file is None:
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jh7370 wrote:

Rather than looping and incrementing a counter, have you considered either using a UUID as a name suffix or `tempfile.mkstemp`? The latter should provide the functionality you need, unless you specifically want the incrementing behaviour, of course.

https://github.com/llvm/llvm-project/pull/112729