update!: switch from one comma-sep. argument to variadic args. for hosts

Since the hosts are what nixos-rebuild acts on it makes to have them
represented by unlimited variadic arguments similar to how "git add",
"cat", "nix build", etc. work.

src/infra_rebuild/cli/__init__.py

@@ -10,42 +10,42 @@ def infra_rebuild():
 
 
 @infra_rebuild.command()
-@click.argument("hosts")
+@click.argument("hosts", nargs=-1)
 def build(hosts):
     operations.run("build", hosts)
 
 
 @infra_rebuild.command()
-@click.argument("hosts")
+@click.argument("hosts", nargs=-1)
 def build_vm(hosts):
     operations.run("build-vm", hosts)
 
 
 @infra_rebuild.command()
-@click.argument("hosts")
+@click.argument("hosts", nargs=-1)
 def build_vm_with_bootloader(hosts):
     operations.run("build-vm-with-bootloader", hosts)
 
 
 @infra_rebuild.command()
-@click.argument("hosts")
+@click.argument("hosts", nargs=-1)
 def switch(hosts):
     operations.run("switch", hosts)
 
 
 @infra_rebuild.command()
-@click.argument("hosts")
+@click.argument("hosts", nargs=-1)
 def boot(hosts):
     operations.run("boot", hosts)
 
 
 @infra_rebuild.command()
-@click.argument("hosts")
+@click.argument("hosts", nargs=-1)
 def test(hosts):
     operations.run("test", hosts)
 
 
 @infra_rebuild.command()
-@click.argument("hosts")
+@click.argument("hosts", nargs=-1)
 def reboot(hosts):
     operations.run("reboot", hosts)

src/infra_rebuild/operations/__init__.py

@@ -23,8 +23,7 @@ def run(operation, hosts):
             msg.error("Internal Error: The given operation isn't valid.")
             sys.exit(1)
 
-    for host_string in hosts.split(","):
-        host = host_string.strip()
+    for host in hosts:
         if not host:
             msg.warning("Skipping empty string provided for host.")
             continue