feat: add engine lib modules (ufw, crowdsec, systemd, notify)

engine/lib/crowdsec.py

@@ -0,0 +1,27 @@
+# engine/lib/crowdsec.py
+"""ctx.crowdsec — install + config deploy + collections (port of configure/crowdsec)."""
+from __future__ import annotations
+import os
+import shutil
+
+
+class Crowdsec:
+    def __init__(self, log, sys_, tpl, host):
+        self.log, self.sys, self.tpl, self.host = log, sys_, tpl, host
+
+    def ensure_installed(self) -> None:
+        if shutil.which("cscli"):
+            return
+        self.log.info("Installing CrowdSec via official script...")
+        self.sys.run(["bash", "-c", "curl -s https://install.crowdsec.net | sudo sh"], check=True)
+        self.sys.sudo(["apt-get", "install", "-y", "crowdsec"])
+
+    def deploy(self, configs_subdir: str, vars: dict, dry_run: bool = False) -> None:
+        for rel, content in self.tpl.render_dir(configs_subdir, vars).items():
+            self.host.write_file(os.path.join("/etc/crowdsec", rel), content,
+                                 backup=True, dry_run=dry_run, sudo=True)
+
+    def install_collections(self, collections) -> None:
+        self.sys.sudo(["cscli", "hub", "update"])
+        for c in collections:
+            self.sys.sudo(["cscli", "collections", "install", c])