cmdeploy: introduce LocalExec object

cmdeploy/src/cmdeploy/cmdeploy.py

@@ -19,7 +19,7 @@ from packaging import version
 from termcolor import colored
 
 from . import dns, remote
-from .sshexec import SSHExec
+from .sshexec import SSHExec, LocalExec
 
 #
 # cmdeploy sub commands and options
@@ -365,9 +365,9 @@ def get_parser():
 
 def get_sshexec(ssh_host: str, verbose=True):
     if ssh_host in ["localhost", "@local"]:
-        return "localhost"
+        return LocalExec(verbose, docker=False)
     elif ssh_host == "docker":
-        return "docker"
+        return LocalExec(verbose, docker=True)
     if verbose:
         print(f"[ssh] login to {ssh_host}")
     return SSHExec(ssh_host, verbose=verbose)

cmdeploy/src/cmdeploy/dns.py

@@ -7,15 +7,9 @@ from . import remote
 
 
 def get_initial_remote_data(sshexec, mail_domain):
-    if sshexec == "localhost":
-        result = remote.rdns.perform_initial_checks(mail_domain)
-    elif sshexec == "docker":
-        result = remote.rdns.perform_initial_checks(mail_domain, pre_command="docker exec chatmail ")
-    else:
-        result = sshexec.logged(
-            call=remote.rdns.perform_initial_checks, kwargs=dict(mail_domain=mail_domain)
-        )
-    return result
+    return sshexec.logged(
+        call=remote.rdns.perform_initial_checks, kwargs=dict(mail_domain=mail_domain)
+    )
 
 
 def check_initial_remote_data(remote_data, *, print=print):
@@ -50,14 +44,9 @@ def check_full_zone(sshexec, remote_data, out, zonefile) -> int:
     """Check existing DNS records, optionally write them to zone file
     and return (exitcode, remote_data) tuple."""
 
-    if sshexec in ["localhost", "docker"]:
-        required_diff, recommended_diff = remote.rdns.check_zonefile(
-            zonefile=zonefile, verbose=False
-        )
-    else:
-        required_diff, recommended_diff = sshexec.logged(
-            remote.rdns.check_zonefile, kwargs=dict(zonefile=zonefile, verbose=False),
-        )
+    required_diff, recommended_diff = sshexec.logged(
+        remote.rdns.check_zonefile, kwargs=dict(zonefile=zonefile, verbose=False),
+    )
 
     returncode = 0
     if required_diff:

cmdeploy/src/cmdeploy/sshexec.py

@@ -82,3 +82,19 @@ class SSHExec:
             res = self(call, kwargs, log_callback=remote.rshell.log_progress)
             print_stderr()
             return res
+
+
+class LocalExec:
+    def __init__(self, verbose=False, docker=False):
+        self.verbose = verbose
+        self.docker = docker
+
+    def logged(self, call, kwargs: dict):
+        where = "locally"
+        if self.docker:
+            if call == remote.rdns.perform_initial_checks:
+                kwargs['pre_command'] = "docker exec chatmail "
+                where = "in docker"
+        if self.verbose:
+            print(f"Running {where}: {call.__name__}(**{kwargs})")
+        return call(**kwargs)