config : use the defaults from defaults.py

Remove the defaults from the dataclasses as they are redundent with the
fallbacks of configparser.
Use the values in defaults.py as the fallbacks instead of hardcoded
values.

src/unisync/config.py

@@ -7,16 +7,18 @@ from pathlib import Path
 import ipaddress
 import configparser
 
+from unisync.defaults import *
+
 @dataclass
 class ServerConfig:
     """
     Dataclass keeping the config for connecting to the server
     """
     user: str
-    sshargs: str = ""
-    hostname: str = ""
-    ip: str = ""
-    port: int = 22
+    sshargs: str
+    hostname: str
+    ip: str
+    port: int
 
     def __post_init__(self):
         """
@@ -44,15 +46,15 @@ class UnisonConfig:
     """
     Dataclass keeping unison specific configurations
     """
-    bools: list = field(default_factory=list)
-    values: dict = field(default_factory=dict)
+    bools: list
+    values: dict
 
 @dataclass
 class OtherConfig:
     """
     Dataclass keeping miscellanous configuration options
     """
-    cache_dir_path: Path = Path("~/.unisync").expanduser()
+    cache_dir_path: Path
 
 @dataclass
 class Config:
@@ -62,7 +64,7 @@ class Config:
     server: ServerConfig
     roots: RootsConfig
     unison: UnisonConfig
-    other: OtherConfig = field(default_factory=OtherConfig)
+    other: OtherConfig
 
 
 def load_config(config_path:str) -> Config:
@@ -83,13 +85,13 @@ def load_config(config_path:str) -> Config:
 
     server_config = ServerConfig(
             config.get(server_section, "user"),
-            config.get(server_section, "sshargs", fallback=""),
-            config.get(server_section, "hostname", fallback=""),
-            config.get(server_section, "ip", fallback=""),
-            config.getint(server_section, "port", fallback=22)
+            config.get(server_section, "sshargs", fallback=DEFAULT_SERVER_SSHARGS),
+            config.get(server_section, "hostname", fallback=DEFAULT_SERVER_HOSTNAME),
+            config.get(server_section, "ip", fallback=DEFAULT_SERVER_IP),
+            config.getint(server_section, "port", fallback=DEFAULT_SERVER_PORT)
         )
     roots_config = RootsConfig(
-            config.get(roots_section, "local"),
+            config.get(roots_section, "local", fallback=DEFAULT_ROOTS_LOCAL),
             config.get(roots_section, "remote")
         )
     other_config = OtherConfig(