From 391fbc3b73a04e5e672daaa8f7dfd09b58e83fe3 Mon Sep 17 00:00:00 2001
From: Alex Harvey <alexharv074@gmail.com>
Date: Wed, 7 Apr 2021 14:31:01 +1000
Subject: [PATCH] [Resolve #988] Stop hiding debug info in helpers

Before this, the catch_exceptions function in cli/helpers would catch a
range of exceptions and then hide all but the error message from the
caller.

Over the years, this has caused myself and others quite a lot of lost
time, as it is now often quite unclear what caused Sceptre to fail.

Simply re-raising the original exception provides valuable information
to allow users of Sceptre to debug their failing code.
---
 sceptre/cli/helpers.py | 5 ++---
 tests/test_cli.py      | 7 +++----
 2 files changed, 5 insertions(+), 7 deletions(-)

diff --git a/sceptre/cli/helpers.py b/sceptre/cli/helpers.py
index 69edba63f..ffce230f3 100644
--- a/sceptre/cli/helpers.py
+++ b/sceptre/cli/helpers.py
@@ -1,5 +1,4 @@
 import logging
-import sys
 from functools import partial, wraps
 
 import json
@@ -30,14 +29,14 @@ def catch_exceptions(func):
     def decorated(*args, **kwargs):
         """
         Invokes ``func``, catches expected errors, prints the error message and
-        exits sceptre with a non-zero exit code.
+        re-raises.
         """
         try:
             return func(*args, **kwargs)
         except (SceptreException, BotoCoreError, ClientError, Boto3Error,
                 TemplateError) as error:
             write(error)
-            sys.exit(1)
+            raise
 
     return decorated
 
diff --git a/tests/test_cli.py b/tests/test_cli.py
index d13d43716..74a5f9bc3 100644
--- a/tests/test_cli.py
+++ b/tests/test_cli.py
@@ -55,14 +55,13 @@ def teardown_method(self, test_method):
         self.patcher_ConfigReader.stop()
         self.patcher_StackActions.stop()
 
-    @patch("sys.exit")
-    def test_catch_excecptions(self, mock_exit):
+    def test_catch_excecptions(self):
         @catch_exceptions
         def raises_exception():
             raise SceptreException()
 
-        raises_exception()
-        mock_exit.assert_called_once_with(1)
+        with pytest.raises(SceptreException):
+            raises_exception()
 
     @pytest.mark.parametrize("command,files,output", [
         # one --var option