Bump version to 1.28.0

Author: karkhaz

CHANGELOG

@@ -1,6 +1,16 @@
                               CHANGELOG
                               `````````
 
+Version 1.28.0 -- 2023-03-02
+----------------------------
+This is a bugfix release containing the following fix:
+- Ensure signal handler does not run concurrently
+
+  Currently, a signal handler may be invoked while another one is
+  running.  This resulted in a race when two concurrent python functions
+  attempted to read from and write to the same file.
+
+
 Version 1.27.0 -- 2022-08-03
 ----------------------------
 - Modify behavior of acquire-html-dir command

lib/litani.py

@@ -33,7 +33,7 @@
 TIME_FORMAT_W = "%Y-%m-%dT%H:%M:%SZ"
 TIME_FORMAT_MS = "%Y-%m-%dT%H:%M:%S.%fZ"
 VERSION_MAJOR = 1
-VERSION_MINOR = 27
+VERSION_MINOR = 28
 VERSION_PATCH = 0
 RC = False
 

lib/run_printer.py

@@ -36,6 +36,8 @@
 DUMP_SIGNAL = signal.SIGUSR1
 _DUMPED_RUN = "dumped-run.json"
 
+_SIGNAL_HANDLER_RUNNING = False
+
 
 def add_subparser(subparsers):
     dump_run_pars = subparsers.add_parser("dump-run")
@@ -206,7 +208,14 @@ class DumpRunSignalHandler:
 
 
     def __call__(self, _signum, _frame):
+        global _SIGNAL_HANDLER_RUNNING
+
+        if _SIGNAL_HANDLER_RUNNING:
+            return
+
+        _SIGNAL_HANDLER_RUNNING = True
         run = lib.litani_report.get_run_data(self.cache_dir)
         with lib.litani.atomic_write(
                 self.cache_dir / _DUMPED_RUN) as handle:
             print(json.dumps(run, indent=2), file=handle)
+        _SIGNAL_HANDLER_RUNNING = False