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, 19 insertions, 13 deletions

diff --git a/cli/objects/disks.py b/cli/objects/disks.py
index e00b760..81b404e 100644
--- a/cli/objects/disks.py
+++ b/cli/objects/disks.py
@@ -23,8 +23,11 @@ class OgDisk():
         parsed_args = parser.parse_args(args)
         payload = {'client': [parsed_args.client_ip]}
 
-        r = rest.get('/client/setup', payload=payload)
-        print_json(r.text)
+        res = rest.get('/client/setup', payload=payload)
+        if not res:
+            return 1
+        print_json(res.text)
+        return 0
 
     @staticmethod
     def setup_disk(rest, args):
@@ -79,8 +82,8 @@ class OgDisk():
                            help='Specific client IP')
 
         parsed_args = parser.parse_args(args)
-        r = rest.get('/scopes')
-        scopes = r.json()
+        res = rest.get('/scopes')
+        scopes = res.json()
         ips = set()
 
         for center in parsed_args.center_id:
@@ -93,11 +96,11 @@ class OgDisk():
             ips.add(l)
         if not ips:
             print("Missing --client-ip, or --room-id/--center-id. No clients provided.")
-            return None
+            return 1
 
         if not parsed_args.num.isdigit():
             print(f'Invalid disk number: must be an integer value')
-            return
+            return 1
 
         payload = {'clients': parsed_args.client_ip, 'type': disk_type_map[parsed_args.type], 'disk': str(parsed_args.num),
                    'cache': '0', 'cache_size': '0', 'partition_setup': []}
@@ -109,31 +112,31 @@ class OgDisk():
 
             if len(p) != 4:
                 print(f'Invalid partition: requires "num,part_scheme,fs,size", "{",".join(p)}" provided')
-                return
+                return 1
             part_num, code, fs, size = p[0], p[1].upper(), p[2].upper(), p[3]
 
             if not part_num.isdigit():
                 print(f'Invalid partition: the first parameter must be a number, "{part_num}" provided')
-                return
+                return 1
 
             if part_num in defined_part_indices:
                 print(f'Invalid partition: partition number "{part_num}" has multiple definitions')
-                return
+                return 1
 
             defined_part_indices.add(part_num)
 
             if code not in part_types:
                 print(f'Invalid partition {i}: specified partition type {code} is not supported. The supported formats are {part_types}')
-                return
+                return 1
 
             if fs not in fs_types:
                 print(f'Invalid partition {i}: specified filesystem {fs} is not supported. The supported formats are {fs_types}')
-                return
+                return 1
             try:
                 size = parse_size(size)
             except ValueError as error:
                 print(f'Invalid partition {i}: {str(error)}')
-                return
+                return 1
 
             for j in range(i, int(part_num)):
                 part = {'partition': str(j), 'code': 'EMPTY',
@@ -158,4 +161,7 @@ class OgDisk():
                     'format': '0'}
             payload['partition_setup'].append(part)
 
-        rest.post('/setup', payload=payload)
+        res = rest.post('/setup', payload=payload)
+        if not res:
+            return 1
+        return 0