Add support for systemd and postfix config files

tests/test_systemd_format.py

@@ -0,0 +1,26 @@
+from __future__ import annotations
+
+from pathlib import Path
+
+import jinjaturtle.core as core
+
+
+def test_systemd_unit_repeated_keys(tmp_path: Path) -> None:
+    p = tmp_path / "demo.service"
+    p.write_text(
+        "[Service]\n" "ExecStart=/bin/echo one\n" "ExecStart=/bin/echo two\n",
+        encoding="utf-8",
+    )
+
+    fmt, parsed = core.parse_config(p)
+    assert fmt == "systemd"
+
+    flat = core.flatten_config(fmt, parsed)
+    assert (("Service", "ExecStart", "0"), "/bin/echo one") in flat
+    assert (("Service", "ExecStart", "1"), "/bin/echo two") in flat
+
+    template = core.generate_jinja2_template(
+        fmt, parsed, role_prefix="role", original_text=p.read_text(encoding="utf-8")
+    )
+    assert "ExecStart={{ role_service_execstart_0 }}" in template
+    assert "ExecStart={{ role_service_execstart_1 }}" in template