Add ability to enroll RH-style systems (DNF5/DNF/RPM)

tests/test_platform.py

@@ -0,0 +1,93 @@
+from __future__ import annotations
+
+from pathlib import Path
+
+import enroll.platform as platform
+
+
+def test_read_os_release_parses_kv_and_strips_quotes(tmp_path: Path):
+    p = tmp_path / "os-release"
+    p.write_text(
+        """
+# comment
+ID=fedora
+ID_LIKE=\"rhel centos\"
+NAME=\"Fedora Linux\"
+EMPTY=
+NOEQUALS
+""",
+        encoding="utf-8",
+    )
+
+    osr = platform._read_os_release(str(p))
+    assert osr["ID"] == "fedora"
+    assert osr["ID_LIKE"] == "rhel centos"
+    assert osr["NAME"] == "Fedora Linux"
+    assert osr["EMPTY"] == ""
+    assert "NOEQUALS" not in osr
+
+
+def test_detect_platform_prefers_os_release(monkeypatch):
+    monkeypatch.setattr(
+        platform,
+        "_read_os_release",
+        lambda path="/etc/os-release": {"ID": "fedora", "ID_LIKE": "rhel"},
+    )
+    # If os-release is decisive we shouldn't need which()
+    monkeypatch.setattr(platform.shutil, "which", lambda exe: None)
+
+    info = platform.detect_platform()
+    assert info.os_family == "redhat"
+    assert info.pkg_backend == "rpm"
+
+
+def test_detect_platform_fallbacks_to_dpkg_when_unknown(monkeypatch):
+    monkeypatch.setattr(platform, "_read_os_release", lambda path="/etc/os-release": {})
+    monkeypatch.setattr(
+        platform.shutil, "which", lambda exe: "/usr/bin/dpkg" if exe == "dpkg" else None
+    )
+
+    info = platform.detect_platform()
+    assert info.os_family == "debian"
+    assert info.pkg_backend == "dpkg"
+
+
+def test_get_backend_unknown_prefers_rpm_if_present(monkeypatch):
+    monkeypatch.setattr(
+        platform.shutil, "which", lambda exe: "/usr/bin/rpm" if exe == "rpm" else None
+    )
+
+    b = platform.get_backend(
+        platform.PlatformInfo(os_family="unknown", pkg_backend="unknown", os_release={})
+    )
+    assert isinstance(b, platform.RpmBackend)
+
+
+def test_rpm_backend_modified_paths_labels_conffiles(monkeypatch):
+    b = platform.RpmBackend()
+
+    # Pretend rpm -V says both files changed, but only one is a config file.
+    monkeypatch.setattr(b, "_modified_files", lambda pkg: {"/etc/foo.conf", "/etc/bar"})
+    monkeypatch.setattr(b, "_config_files", lambda pkg: {"/etc/foo.conf"})
+
+    out = b.modified_paths("mypkg", ["/etc/foo.conf", "/etc/bar", "/etc/dnf/dnf.conf"])
+    assert out["/etc/foo.conf"] == "modified_conffile"
+    assert out["/etc/bar"] == "modified_packaged_file"
+    # Package-manager config paths are excluded.
+    assert "/etc/dnf/dnf.conf" not in out
+
+
+def test_specific_paths_for_hints_differs_between_backends():
+    # We can exercise this without instantiating DpkgBackend (which reads dpkg status)
+    class Dummy(platform.PackageBackend):
+        name = "dummy"
+        pkg_config_prefixes = ("/etc/apt/",)
+
+    d = Dummy()
+    assert d.is_pkg_config_path("/etc/apt/sources.list")
+    assert not d.is_pkg_config_path("/etc/ssh/sshd_config")
+
+    r = platform.RpmBackend()
+    paths = set(r.specific_paths_for_hints({"nginx"}))
+    assert "/etc/sysconfig/nginx" in paths
+    assert "/etc/sysconfig/nginx.conf" in paths