nixbld: fix hooks page breaking github backups

https://github.com/josegonzalez/python-github-backup/issues/176

nixbld-etc-nixos/ghbackup-179.patch

@@ -0,0 +1,61 @@
+diff --git a/github_backup/github_backup.py b/github_backup/github_backup.py
+index 4ef8b7e..82cbdca 100644
+--- a/github_backup/github_backup.py
++++ b/github_backup/github_backup.py
+@@ -425,7 +425,7 @@ def get_github_repo_url(args, repository):
+     return repo_url
+ 
+ 
+-def retrieve_data_gen(args, template, query_args=None, single_request=False):
++def retrieve_data_gen(args, template, query_args=None, single_request=False, optional=False):
+     auth = get_auth(args, encode=not args.as_app)
+     query_args = get_query_args(query_args)
+     per_page = 100
+@@ -452,6 +452,11 @@ def retrieve_data_gen(args, template, query_args=None, single_request=False):
+         else:
+             read_error = False
+ 
++        # Requested data does not exist for this repository, but that was expected.
++        # Generate an empty list.
++        if status_code == 404 and optional:
++            return
++
+         # be gentle with API request limit and throttle requests if remaining requests getting low
+         limit_remaining = int(r.headers.get('x-ratelimit-remaining', 0))
+         if args.throttle_limit and limit_remaining <= args.throttle_limit:
+@@ -509,8 +514,8 @@ def retrieve_data_gen(args, template, query_args=None, single_request=False):
+             break
+ 
+ 
+-def retrieve_data(args, template, query_args=None, single_request=False):
+-    return list(retrieve_data_gen(args, template, query_args, single_request))
++def retrieve_data(args, template, query_args=None, single_request=False, optional=False):
++    return list(retrieve_data_gen(args, template, query_args, single_request, optional))
+ 
+ 
+ def get_query_args(query_args=None):
+@@ -1011,7 +1016,8 @@ def backup_hooks(args, repo_cwd, repository, repos_template):
+                      'hooks',
+                      template,
+                      output_file,
+-                     hook_cwd)
++                     hook_cwd,
++                     optional=not args.include_hooks)
+     except SystemExit:
+         log_info("Unable to read hooks, skipping")
+ 
+@@ -1158,12 +1164,12 @@ def backup_account(args, output_directory):
+                      account_cwd)
+ 
+ 
+-def _backup_data(args, name, template, output_file, output_directory):
++def _backup_data(args, name, template, output_file, output_directory, optional=False):
+     skip_existing = args.skip_existing
+     if not skip_existing or not os.path.exists(output_file):
+         log_info('Retrieving {0} {1}'.format(args.user, name))
+         mkdir_p(output_directory)
+-        data = retrieve_data(args, template)
++        data = retrieve_data(args, template, optional=optional)
+ 
+         log_info('Writing {0} {1} to disk'.format(len(data), name))
+         with codecs.open(output_file, 'w', encoding='utf-8') as f:

nixbld-etc-nixos/github-backup-module.nix

@@ -9,6 +9,7 @@ let
       rev = "18e78a4d66120961590836e63d1fa939e4d036f3";
       sha256 = "1c5qxyv322z5zkx8mxdwdqrnjgqhk00aqcgwkn53b4xkfr2idkbn";
     };
+    patches = [ ./ghbackup-179.patch ];
     propagatedBuildInputs = [ pkgs.git ];
   };
   token = (import /etc/nixos/secret/github_tokens.nix).backup;
@@ -31,7 +32,7 @@ in
     enable = mkOption {
       type = types.bool;
       default = false;
-      description = "Enable GitHub backups";
+      description = "Enable backups";
     };
   };