Added support for passing connection details as variables in the passexec command. #6794

Author: pravesh-sharma

docs/en_US/server_dialog.rst

@@ -205,6 +205,8 @@ Use the fields in the *Advanced* tab to configure a connection:
   command will be used as the SQL password. This may be useful when the password
   should be generated as a transient authorization token instead of providing a
   password when connecting in `PAM authentication <https://www.postgresql.org/docs/current/auth-pam.html>`_ scenarios.
+  You can pass server hostname, port, and DB username to the password exec command as variable by providing placeholders 
+  like ``%DB_HOSTNAME%``, ``%DB_PORT%`` and ``%DB_USERNAME%`` which will be replaced with the server connection information.
 * Use the *Password exec expiration* field to specify a maximum age, in seconds,
   of the password generated with a *Password exec command*. If not specified,
   the password will not expire until your pgAdmin session does.

web/pgadmin/utils/driver/psycopg3/server_manager.py

@@ -83,7 +83,8 @@ def update(self, server):
         self.db_res = server.db_res
         self.name = server.name
         self.passexec = \
-            PasswordExec(server.passexec_cmd, server.passexec_expiration) \
+            PasswordExec(server.passexec_cmd, server.host, server.port,
+                         server.username, server.passexec_expiration) \
             if server.passexec_cmd else None
         self.service = server.service
 

web/pgadmin/utils/passexec.py

@@ -20,8 +20,12 @@ class PasswordExec:
 
     lock = Lock()
 
-    def __init__(self, cmd, expiration_seconds=None, timeout=60):
-        self.cmd = str(cmd)
+    def __init__(self, cmd, host, port, username, expiration_seconds=None,
+                 timeout=60):
+        cmd = str(cmd).replace('%DB_HOSTNAME%', host)
+        cmd = cmd.replace('%DB_PORT%', str(port))
+        cmd = cmd.replace('%DB_USERNAME%', username)
+        self.cmd = cmd
         self.expiration_seconds = int(expiration_seconds) \
             if expiration_seconds is not None else None
         self.timeout = int(timeout)