From 497fb9e21f45ec08e1486abaee6dfa7b20b8a691 Mon Sep 17 00:00:00 2001
From: Scott Gasch <scott@gasch.org>
Date: Wed, 24 Mar 2021 18:08:54 -0700
Subject: Initial revision

---
 bootstrap.py | 64 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 64 insertions(+)
 create mode 100644 bootstrap.py

(limited to 'bootstrap.py')

diff --git a/bootstrap.py b/bootstrap.py
new file mode 100644
index 0000000..d1233e9
--- /dev/null
+++ b/bootstrap.py
@@ -0,0 +1,64 @@
+#!/usr/bin/env python3
+
+import functools
+import logging
+import os
+import sys
+import time
+import traceback
+
+import argparse_utils
+import config
+import logging_utils
+
+
+logger = logging.getLogger(__name__)
+
+args = config.add_commandline_args(
+    f'Bootstrap ({__file__})',
+    'Args related to python program bootstrapper and Swiss army knife')
+args.add_argument(
+    '--debug_unhandled_exceptions',
+    action=argparse_utils.ActionNoYes,
+    default=False,
+    help='Break into debugger on top level unhandled exceptions for interactive debugging'
+)
+
+
+def handle_uncaught_exception(
+        exc_type,
+        exc_value,
+        exc_traceback):
+    if issubclass(exc_type, KeyboardInterrupt):
+        sys.__excepthook__(exc_type, exc_value, exc_traceback)
+        return
+    logger.exception(f'Unhandled top level {exc_type}',
+                     exc_info=(exc_type, exc_value, exc_traceback))
+    traceback.print_exception(exc_type, exc_value, exc_traceback)
+    if config.config['debug_unhandled_exceptions']:
+        logger.info("Invoking the debugger...")
+        breakpoint()
+
+
+def initialize(funct):
+    """Remember to initialize config and logging before running main."""
+    @functools.wraps(funct)
+    def initialize_wrapper(*args, **kwargs):
+        sys.excepthook = handle_uncaught_exception
+        config.parse()
+        logging_utils.initialize_logging(logging.getLogger())
+        logger.debug(f"About to invoke {funct}...")
+        start = time.perf_counter()
+        ret = funct(*args, **kwargs)
+        end = time.perf_counter()
+        logger.debug(f'{funct} returned {ret}.')
+        (utime, stime, cutime, cstime, elapsed_time) = os.times()
+        logger.debug(f'\nuser: {utime}s\n'
+                     f'system: {stime}s\n'
+                     f'child user: {cutime}s\n'
+                     f'child system: {cstime}s\n'
+                     f'elapsed: {elapsed_time}s\n'
+                     f'walltime: {end - start}s\n')
+        logger.info(f'Exit {ret}')
+        sys.exit(ret)
+    return initialize_wrapper
-- 
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