feat: allow to use one application for multiple repositories (#111)

* allow to use one application for multiple repositories

* update tests

* handle None append argument everywhere

* rewrite repository definition logic

* drop optional flags from docs

* support of new schema in systemd units

* add migration docs and ability to migrate tree automatically

* use repostory id instead

* verbose multiarchitectureerror

* object path support for s3 sync

* fix tests after rebase

tests/ahriman/models/test_repository_id.py

@@ -0,0 +1,40 @@
+import pytest
+
+from ahriman.models.repository_id import RepositoryId
+
+
+def test_is_empty() -> None:
+    """
+    must check if repository id is empty or not
+    """
+    assert RepositoryId("", "").is_empty
+    assert RepositoryId("arch", "").is_empty
+    assert RepositoryId("", "repo").is_empty
+    assert not RepositoryId("arch", "repo").is_empty
+
+
+def test_id() -> None:
+    """
+    must correctly generate id
+    """
+    assert RepositoryId("", "").id == "-"
+    assert RepositoryId("arch", "repo").id == "arch-repo"
+
+
+def test_lt() -> None:
+    """
+    must correctly compare instances
+    """
+    assert RepositoryId("x86_64", "a") < RepositoryId("x86_64", "b")
+    assert RepositoryId("x86_64", "b") > RepositoryId("x86_64", "a")
+
+    assert RepositoryId("i686", "a") < RepositoryId("x86_64", "a")
+    assert RepositoryId("x86_64", "a") > RepositoryId("i686", "a")
+
+
+def test_lt_invalid() -> None:
+    """
+    must raise ValueError if other is not valid repository id
+    """
+    with pytest.raises(ValueError):
+        RepositoryId("x86_64", "a") < 42