fix lxc-test to not re-run deploy when nothing changed + some other beautifications

cmdeploy/src/cmdeploy/lxc/cli.py

@@ -37,15 +37,13 @@ def lxc_start_cmd_options(parser):
 def lxc_start_cmd(args, out):
     """Create/Ensure and start LXC relay and DNS containers."""
     ix = Incus()
-    relays = [ix.get_container(n) for n in args.names] or [
-        ix.get_container(RELAY_NAMES[0])
-    ]
     out.green("Ensuring DNS container (ns-localchat) ...")
     dns_ct = ix.get_dns_container()
     dns_ct.ensure()
-    dns_ip = dns_ct.ipv4
-    print(f"  DNS container IP: {dns_ip}")
+    print(f"  DNS container IP: {dns_ct.ipv4}")
 
+    names = args.names if args.names else RELAY_NAMES
+    relays = list(ix.get_container(n) for n in names)
     for ct in relays:
         out.green(f"Ensuring container {ct.name!r} ({ct.domain}) ...")
         ct.ensure()
@@ -81,12 +79,12 @@ def lxc_start_cmd(args, out):
         print(
             f"Resetting DNS zones for {len(started)} domain(s) (A + AAAA records) ..."
         )
-        dns_ct.reset_dns_records(dns_ip, started)
+        dns_ct.reset_dns_records(dns_ct.ipv4, started)
 
         for ct in relays:
             if ct.name in started_cnames:
                 print(f"  Configuring DNS in {ct.name} ...")
-                ct.configure_dns(dns_ip)
+                ct.configure_dns(dns_ct.ipv4)
 
     # Generate the unified SSH config
     out.green("Writing ssh-config ...")

cmdeploy/src/cmdeploy/lxc/incus.py

@@ -120,7 +120,7 @@ class Incus:
         return json.loads(result.stdout)
 
     def run_output(self, args, check=True):
-        """Run an incus command and return its stdout.
+        """Run an incus command and return its stripped stdout.
 
         When *check* is False, returns *None* on non-zero exit
         instead of raising.
@@ -128,7 +128,7 @@ class Incus:
         result = self.run(args, check=check)
         if result.returncode != 0:
             return None
-        return result.stdout
+        return result.stdout.strip()
 
     def _find_image(self, alias):
         """Return *alias* if an image with that alias exists, else None."""
@@ -396,9 +396,10 @@ class RelayContainer(Container):
 
     def configure_hosts(self, ip):
         """Set hostname and /etc/hosts inside the container."""
-        self.bash(f"""\
+        self.bash(f"""
             echo '{self.name}' > /etc/hostname
             hostname {self.name}
+            sed -i '/ {self.domain}$/d' /etc/hosts
             echo '{ip} {self.name} {self.domain}' >> /etc/hosts
         """)
 
@@ -419,16 +420,14 @@ class RelayContainer(Container):
 
     def deployed_version(self):
         """Read /etc/chatmail-version, or None if absent."""
-        output = self.bash("cat /etc/chatmail-version", check=False)
-        return output.strip() if output else None
+        return self.bash("cat /etc/chatmail-version", check=False)
 
     def deployed_domain(self):
         """Read the domain deployed on the container (postfix myhostname)."""
-        output = self.bash(
+        return self.bash(
             "postconf -h myhostname 2>/dev/null",
             check=False,
         )
-        return output.strip() if output else None
 
     def verify_ssh(self, ssh_config):
         """Verify SSH connectivity to this container."""

cmdeploy/src/cmdeploy/util.py

@@ -57,7 +57,9 @@ def get_version_string():
     """
     git_hash = get_git_hash() or "unknown"
     try:
-        git_diff = shell("git diff", cwd=str(_project_root())).stdout
+        git_diff = shell("git diff", cwd=str(_project_root())).stdout.strip()
     except Exception:
         git_diff = ""
-    return git_hash + "\n" + git_diff
+    if git_diff:
+        return f"{git_hash}\n{git_diff}"
+    return git_hash