Completely remove first install flag

install.py

@@ -22,7 +22,6 @@ class Installer:
     def __init__(
         self,
         config: str,
-        first_install: bool = False,
         force: bool = False,
         hide_commands: bool = False,
         update: bool = False,
@@ -32,7 +31,6 @@ class Installer:
         yaml = YAML(typ="safe")
         self.conf = yaml.load(Path(config).text())
         self.force = force
-        self.first_install = first_install
         self.hide_commands = hide_commands
         self.home = Path("~").expanduser()
         self.operating_system = self.define_os()
@@ -138,8 +136,6 @@ class Installer:
             "debian": self.operating_system == "debian",
             "force": self.force,
             "no force": not self.force,
-            "first install": self.first_install,
-            "no first install": not self.first_install,
             "update": self.update,
             "no update": not self.update,
         }
@@ -394,7 +390,8 @@ class Installer:
         if not content.endswith("\n"):
             content += "\n"
 
-        p_dest.write_text(content, append=append)
+        if not p_dest.exists() or content not in p_dest.read_text():
+            p_dest.write_text(content, append=append)
 
     def process(self, programs: Optional[List[str]] = None) -> None:
         """Install the programs provided.
@@ -474,12 +471,6 @@ def main() -> None:
         "--config",
         help="Use CONFIG file (default: 'configs.yml')",
     )
-    parser.add_argument(
-        "-i",
-        "--first_install",
-        action="store_true",
-        help="Assume the program is not installed",
-    )
     parser.add_argument(
         "-f",
         "--force",
@@ -526,7 +517,6 @@ def main() -> None:
     else:
         config = "configs.yml"
 
-    first_install = args.first_install
     force = args.force
     generate = args.generate
     hide_commands = args.hide_commands
@@ -536,7 +526,6 @@ def main() -> None:
 
     installer = Installer(
         config=config,
-        first_install=first_install,
         force=force,
         hide_commands=hide_commands,
         update=update,