Fix error handling logic (#30)

The error needs to be re-raised when it's a 404 so it gets retried, not the other way around.

CHANGELOG.md

@@ -4,6 +4,10 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com),
 and this project adheres to [Semantic Versioning](https://semver.org).
 
+## [3.0.1] - 2020-07-29
+### Fixed
+- Fixed error handling logic when forking to retry when Github returns 404 (because that implies the repo hasn't yet finished forking)
+
 ## [3.0.0] - 2020-07-17
 ### Changed
 - Made forking optional via `--fork` argument, which is mutually exclusive with `--branch`

gordian/repo.py

@@ -125,10 +125,8 @@ def _get_repo_contents(self, path):
             return self._source_repo.get_contents(path, self.source_branch)
         except GithubException as e:
             if e.status == 404:
-                logger.info(f'Repo does not contain {self.source_branch} branch. Exiting...')
-                sys.exit(1)
-            else:
                 raise e
+            logger.info(f'Error fetching repo contents: {e}')
 
     @retry(GithubException, tries=3, delay=1, backoff=2)
     def _make_branch(self):

setup.py

@@ -3,7 +3,7 @@
 setup_reqs = ['pytest', 'pytest-cov', 'pytest-runner', 'flake8']
 setuptools.setup(
     name="gordian",
-    version="3.0.0",
+    version="3.0.1",
     author="Intuit",
     author_email="cg-sre@intuit.com",
     description="A tool to search and replace files in a Git repo",