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# Copyright (c) 2024-2025 Arista Networks, Inc.
# Use of this source code is governed by the Apache License 2.0
# that can be found in the LICENSE file.
# Initially written by Jeremy Schulman at https://github.com/jeremyschulman/aio-eapi
"""asynceapi.SessionConfig definition."""
# -----------------------------------------------------------------------------
# System Imports
# -----------------------------------------------------------------------------
from __future__ import annotations
import re
from typing import TYPE_CHECKING
if TYPE_CHECKING:
from ._types import EapiComplexCommand, EapiJsonOutput, EapiSimpleCommand
from .device import Device
# -----------------------------------------------------------------------------
# Exports
# -----------------------------------------------------------------------------
__all__ = ["SessionConfig"]
# -----------------------------------------------------------------------------
#
# CODE BEGINS
#
# -----------------------------------------------------------------------------
class SessionConfig:
"""Send configuration to a device using the EOS session mechanism.
This is the preferred way of managing configuration changes.
Notes
-----
This class definition is used by the parent Device class definition as
defined by `config_session`. A Caller can use the SessionConfig directly
as well, but it is not required.
"""
CLI_CFG_FACTORY_RESET = "rollback clean-config"
def __init__(self, device: Device, name: str) -> None:
"""Create a new instance of SessionConfig.
The session config instance bound
to the given device instance, and using the session `name`.
Parameters
----------
device
The associated device instance.
name
The name of the config session.
"""
self._device = device
self._cli = device.cli
self._name = name
self._cli_config_session = f"configure session {self.name}"
# -------------------------------------------------------------------------
# properties for read-only attributes
# -------------------------------------------------------------------------
@property
def name(self) -> str:
"""Return read-only session name attribute."""
return self._name
@property
def device(self) -> Device:
"""Return read-only device instance attribute."""
return self._device
# -------------------------------------------------------------------------
# Public Methods
# -------------------------------------------------------------------------
async def status_all(self) -> EapiJsonOutput:
"""Get the status of all the session config on the device.
Run the following command on the device:
# show configuration sessions detail
Returns
-------
EapiJsonOutput
Dictionary of native EOS eAPI response; see `status` method for
details.
Examples
--------
Return example:
```
{
"maxSavedSessions": 1,
"maxOpenSessions": 5,
"sessions": {
"jeremy1": {
"instances": {},
"state": "pending",
"commitUser": "",
"description": ""
},
"ansible_167510439362": {
"instances": {},
"state": "completed",
"commitUser": "joe.bob",
"description": "",
"completedTime": 1675104396.4500246
}
}
}
```
"""
return await self._cli(command="show configuration sessions detail")
async def status(self) -> EapiJsonOutput | None:
"""Get the status of a session config on the device.
Run the following command on the device:
# show configuration sessions detail
And return only the status dictionary for this session. If you want
all sessions, then use the `status_all` method.
Returns
-------
EapiJsonOutput | None
Dictionary instance of the session status. If the session does not exist,
then this method will return None.
Examples
--------
The return is the native eAPI results from JSON output:
```
all results:
{
"maxSavedSessions": 1,
"maxOpenSessions": 5,
"sessions": {
"jeremy1": {
"instances": {},
"state": "pending",
"commitUser": "",
"description": ""
},
"ansible_167510439362": {
"instances": {},
"state": "completed",
"commitUser": "joe.bob",
"description": "",
"completedTime": 1675104396.4500246
}
}
}
```
If the session name was 'jeremy1', then this method would return:
```
{
"instances": {},
"state": "pending",
"commitUser": "",
"description": ""
}
```
"""
res = await self.status_all()
return res["sessions"].get(self.name)
async def push(self, content: list[str] | str, *, replace: bool = False) -> None:
"""Send the configuration content to the device.
If `replace` is true, then the command "rollback clean-config" is issued
before sending the configuration content.
Parameters
----------
content
The text configuration CLI commands, as a list of strings, that
will be sent to the device. If the parameter is a string, and not
a list, then split the string across linebreaks. In either case
any empty lines will be discarded before they are send to the
device.
replace
When True, the content will replace the existing configuration
on the device.
"""
# if given s string, we need to break it up into individual command
# lines.
if isinstance(content, str):
content = content.splitlines()
# prepare the initial set of command to enter the config session and
# rollback clean if the `replace` argument is True.
commands: list[EapiSimpleCommand | EapiComplexCommand] = [self._cli_config_session]
if replace:
commands.append(self.CLI_CFG_FACTORY_RESET)
# add the Caller's commands, filtering out any blank lines. any command
# lines (!) are still included.
commands.extend(filter(None, content))
await self._cli(commands=commands)
async def commit(self, timer: str | None = None) -> None:
"""Commit the session config.
Run the following command on the device:
# configure session <name>
# commit
Parameters
----------
timer
If the timer is specified, format is "hh:mm:ss", then a commit timer is
started. A second commit action must be made to confirm the config
session before the timer expires; otherwise the config-session is
automatically aborted.
"""
command = f"{self._cli_config_session} commit"
if timer:
command += f" timer {timer}"
await self._cli(command=command)
async def abort(self) -> None:
"""Abort the configuration session.
Run the following command on the device:
# configure session <name> abort
"""
await self._cli(command=f"{self._cli_config_session} abort")
async def diff(self) -> str:
"""Return the "diff" of the session config relative to the running config.
Run the following command on the device:
# show session-config named <name> diffs
Returns
-------
str
Return a string in diff-patch format.
References
----------
* https://www.gnu.org/software/diffutils/manual/diffutils.txt
"""
return await self._cli(command=f"show session-config named {self.name} diffs", ofmt="text")
async def load_file(self, filename: str, *, replace: bool = False) -> None:
"""Load the configuration from <filename> into the session configuration.
If the replace parameter is True then the file contents will replace the existing session config (load-replace).
Parameters
----------
filename
The name of the configuration file. The caller is required to
specify the filesystem, for example, the
filename="flash:thisfile.cfg".
replace
When True, the contents of the file will completely replace the
session config for a load-replace behavior.
Raises
------
RuntimeError
If there are any issues with loading the configuration file then a
RuntimeError is raised with the error messages content.
"""
commands: list[EapiSimpleCommand | EapiComplexCommand] = [self._cli_config_session]
if replace:
commands.append(self.CLI_CFG_FACTORY_RESET)
commands.append(f"copy {filename} session-config")
res = await self._cli(commands=commands)
checks_re = re.compile(r"error|abort|invalid", flags=re.IGNORECASE)
messages = res[-1]["messages"]
if any(map(checks_re.search, messages)):
raise RuntimeError("".join(messages))
async def write(self) -> None:
"""Save the running config to the startup config by issuing the command "write" to the device."""
await self._cli(command="write")
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