Add first install arg

install.py

@@ -18,13 +18,16 @@ from ruamel.yaml import YAML  # type: ignore
 class Installer:
     """Regroups all the installation methods listed in the yaml conf file."""
 
-    def __init__(self, force: bool = False, update: bool = False):
+    def __init__(
+        self, force: bool = False, first_install: bool = False, update: bool = False
+    ):
         yaml = YAML(typ="safe")
         self.conf = yaml.load(Path("configs.yml").text())
         self.base_dir = Path.getcwd()
         self.home = Path("~").expanduser()
         self.operating_system = define_os()
         self.force = force
+        self.first_install = first_install
         self.update = update
 
     def evaluate_condition(self, condition: str) -> bool:
@@ -35,6 +38,8 @@ class Installer:
             "debian": self.operating_system == "debian based",
             "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,
         }
@@ -371,6 +376,12 @@ def main() -> None:
     parser.add_argument(
         "-F", "--force", action="store_true", help="Overwrite existing files",
     )
+    parser.add_argument(
+        "-i",
+        "--first_install",
+        action="store_true",
+        help="Assume the program is not installed",
+    )
     parser.add_argument(
         "-g",
         "--generate",
@@ -392,11 +403,12 @@ def main() -> None:
     programs = args.programs
     from_file = args.from_file
     force = args.force
+    first_install = args.first_install
     generate = args.generate
     list_programs = args.list_programs
     update = args.update
 
-    installer = Installer(force=force, update=update)
+    installer = Installer(force=force, first_install=first_install, update=update)
 
     if generate:
         installer.generate_process_list()