cli: ensure the program returns 0 on success and 1 on error

propagate a returncode in each operation and make it the
returncode of the program.

Prevent sys.exit calls in post(), get() and delete() request
handlers to enable cleanup code and error handling. Keep a basic
error log inside the request functions if the connection can't
be established or if the response contains an error code.

1 files changed, 42 insertions, 21 deletions

diff --git a/cli/objects/repo.py b/cli/objects/repo.py
index 7085633..d172a0d 100644
--- a/cli/objects/repo.py
+++ b/cli/objects/repo.py
@@ -13,8 +13,11 @@ class OgRepo():
 
     @staticmethod
     def list_repos(rest):
-        r = rest.get('/repositories')
-        print_json(r.text)
+        res = rest.get('/repositories')
+        if not res:
+            return 1
+        print_json(res.text)
+        return 0
 
     @staticmethod
     def _add_repo(rest, parsed_args):
@@ -22,37 +25,43 @@ class OgRepo():
             'addr': parsed_args.ip,
             'name': parsed_args.name,
         }
-        rest.post('/repository/add', payload=payload)
+        res = rest.post('/repository/add', payload=payload)
+        if not res:
+            return 1
+        return 0
 
     @staticmethod
     def _add_repo_ip(rest, parsed_args):
         for ip in parsed_args.ip:
             if not check_address(ip):
                 print(f'Invalid IP address: {ip}')
-                return
+                return 1
 
-        r = rest.get('/repositories')
+        res = rest.get('/repositories')
         target_repo = None
-        for repo in r.json()['repositories']:
+        for repo in res.json()['repositories']:
             if repo['id'] == parsed_args.id:
                 target_repo = repo
                 break
 
         if not target_repo:
             print('Invalid repository id specified')
-            return
+            return 1
 
         for ip in parsed_args.ip:
             if ip in target_repo['addr']:
                 print(f'The repository already contains the address {ip}')
-                return
+                return 1
 
         payload = {
             'id': parsed_args.id,
             'addr': target_repo['addr'] + parsed_args.ip,
             'name': target_repo['name'],
         }
-        rest.post('/repository/update', payload=payload)
+        res = rest.post('/repository/update', payload=payload)
+        if not res:
+            return 1
+        return 0
 
     @staticmethod
     def add_repo(rest, args):
@@ -101,30 +110,33 @@ class OgRepo():
             'name': parsed_args.name,
         }
 
-        rest.post('/repository/update', payload=payload)
+        res = rest.post('/repository/update', payload=payload)
+        if not res:
+            return 1
+        return 0
 
     @staticmethod
     def _delete_repo_ip(rest, parsed_args):
         for ip in parsed_args.ip:
             if not check_address(ip):
                 print(f'Invalid IP address: {ip}')
-                return
+                return 1
 
-        r = rest.get('/repositories')
+        res = rest.get('/repositories')
         target_repo = None
-        for repo in r.json()['repositories']:
+        for repo in res.json()['repositories']:
             if repo['id'] == parsed_args.id:
                 target_repo = repo
                 break
 
         if not target_repo:
             print('Invalid repository id specified')
-            return
+            return 1
 
         for ip in parsed_args.ip:
             if ip not in target_repo['addr']:
                 print(f'Invalid address {ip}: The repository has the following IPs: {target_repo["addr"]}')
-                return
+                return 1
 
             target_repo['addr'].remove(ip)
 
@@ -133,12 +145,18 @@ class OgRepo():
             'addr': target_repo['addr'],
             'name': target_repo['name'],
         }
-        rest.post('/repository/update', payload=payload)
+        res = rest.post('/repository/update', payload=payload)
+        if not res:
+            return 1
+        return 0
 
     @staticmethod
     def _delete_repo(rest, parsed_args):
         payload = {'id': parsed_args.id}
-        rest.post('/repository/delete', payload=payload)
+        res = rest.post('/repository/delete', payload=payload)
+        if not res:
+            return 1
+        return 0
 
     @staticmethod
     def delete_repo(rest, args):
@@ -184,8 +202,8 @@ class OgRepo():
                            help='Any valid client ip address')
         parsed_args = parser.parse_args(args)
 
-        r = rest.get('/scopes')
-        scopes = r.json()
+        res = rest.get('/scopes')
+        scopes = res.json()
         ips = set()
 
         for room in parsed_args.room_id:
@@ -195,7 +213,10 @@ class OgRepo():
             ips.add(l)
         if not ips:
             print('No valid clients specified.')
-            return
+            return 1
 
         payload = {'id': parsed_args.id, 'clients': list(ips)}
-        rest.post('/client/repo', payload=payload)
+        res = rest.post('/client/repo', payload=payload)
+        if not res:
+            return 1
+        return 0