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, 30 insertions, 12 deletions

diff --git a/cli/objects/client.py b/cli/objects/client.py
index cf5e0b9..a2f8356 100644
--- a/cli/objects/client.py
+++ b/cli/objects/client.py
@@ -14,8 +14,11 @@ class OgClient():
 
     @staticmethod
     def list_clients(rest):
-        r = rest.get('/clients')
-        print_json(r.text)
+        res = rest.get('/clients')
+        if not res:
+            return 1
+        print_json(res.text)
+        return 0
 
     @staticmethod
     def list_client_hardware(rest, args):
@@ -28,8 +31,11 @@ class OgClient():
         parsed_args = parser.parse_args(args)
 
         payload = {'client': parsed_args.client_ip}
-        r = rest.get('/hardware', payload=payload)
-        print_json(r.text)
+        res = rest.get('/hardware', payload=payload)
+        if not res:
+            return 1
+        print_json(res.text)
+        return 0
 
     @staticmethod
     def get_client_properties(rest, args):
@@ -41,8 +47,11 @@ class OgClient():
         parsed_args = parser.parse_args(args)
 
         payload = {'client': parsed_args.client_ip}
-        r = rest.get('/client/info', payload=payload)
-        print_json(r.text)
+        res = rest.get('/client/info', payload=payload)
+        if not res:
+            return 1
+        print_json(res.text)
+        return 0
 
     @staticmethod
     def request_refresh(rest, args):
@@ -55,7 +64,10 @@ class OgClient():
         parsed_args = parser.parse_args(args)
 
         payload = {'clients': parsed_args.client_ip}
-        rest.post('/refresh', payload=payload)
+        res = rest.post('/refresh', payload=payload)
+        if not res:
+            return 1
+        return 0
 
     @staticmethod
     def add_client(rest, args):
@@ -82,8 +94,8 @@ class OgClient():
                     nargs='?',
                     required=True,
                     help='specify the ip address of the client')
-        r = rest.get('/mode')
-        boot_choices = r.json()['modes']
+        res = rest.get('/mode')
+        boot_choices = res.json()['modes']
         parser.add_argument('--boot-mode',
                     nargs='?',
                     required=True,
@@ -100,7 +112,7 @@ class OgClient():
             err = True
         if err:
             parser.print_help(file=sys.stderr)
-            sys.exit(1)
+            return 1
         payload = {
             'name': parsed_args.hostname,
             'netmask': '0',
@@ -113,7 +125,10 @@ class OgClient():
             'netdriver': 'generic',
             'livedir': 'ogLive'
         }
-        rest.post('/client/add', payload=payload)
+        res = rest.post('/client/add', payload=payload)
+        if not res:
+            return 1
+        return 0
 
     @staticmethod
     def delete_client(rest, args):
@@ -127,4 +142,7 @@ class OgClient():
         payload = {
             'clients': parsed_args.ip,
         }
-        rest.post('/client/delete', payload=payload)
+        res = rest.post('/client/delete', payload=payload)
+        if not res:
+            return 1
+        return 0