From 9d0341379184622b3da2e7e05aeeceed4bbf83e9 Mon Sep 17 00:00:00 2001
From: Daniil Baturin <daniil@vyos.io>
Date: Wed, 6 May 2026 14:08:35 +0100
Subject: Revert "Add incremental RST-to-MyST swap mechanism (circinus)
 (#1867)" (#1893)

This reverts commit 5eb383a10ec92c65eed525bc174785a6852e997f.
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----
-lastproofread: '2026-03-16'
----
-
-(command-scripting)=
-
-# Command scripting
-
-VyOS supports executing configuration and operational commands non-interactively
-from shell scripts.
-
-To include VyOS-specific functions and aliases, source the
-`/opt/vyatta/etc/functions/script-template` file at the beginning of your
-script.
-
-```none
-#!/bin/vbash
-source /opt/vyatta/etc/functions/script-template
-exit
-```
-
-
-## Script execute permissions
-
-Simply placing script files in `/config/scripts/` does not mean the system
-can execute them.
-
-To make your scripts executable, grant them **execute permissions**. Use the
-following command:
-
-```none
-chmod +x /config/scripts/script-name.sh
-```
-
-
-## Run configuration commands
-
-In scripts, present configuration commands as in a standard configuration
-session.
-
-For example, to disable a BGP peer during a VRRP transition to the backup
-state, use the following syntax:
-
-```none
-#!/bin/vbash
-source /opt/vyatta/etc/functions/script-template
-configure
-set protocols bgp system-as 65536
-set protocols bgp neighbor 192.168.2.1 shutdown
-commit
-exit
-```
-
-
-## Run operational commands
-
-In scripts, **always** prefix operational commands with `run`.
-
-```none
-#!/bin/vbash
-source /opt/vyatta/etc/functions/script-template
-run show interfaces
-exit
-```
-
-
-## Run commands remotely
-
-You can execute multiple **operational commands** on a remote VyOS system by
-passing a script block over SSH.
-
-```none
-ssh 192.0.2.1 'vbash -s' <<EOF
-source /opt/vyatta/etc/functions/script-template
-run show interfaces
-exit
-EOF
-```
-
-Example output:
-
-```none
-Welcome to VyOS
-Codes: S - State, L - Link, u - Up, D - Down, A - Admin Down
-Interface        IP Address                        S/L  Description
----------        ----------                        ---  -----------
-eth0             192.0.2.1/24                      u/u
-lo               127.0.0.1/8                       u/u
-                ::1/128
-```
-
-
-## Other script languages
-
-If you use a scripting language other than bash, configure your script to
-output the relevant commands, and then source that output into a bash script.
-
-The following example demonstrates this two-step process:
-
-```python
-#!/usr/bin/env python3
-print("delete firewall group address-group somehosts")
-print("set firewall group address-group somehosts address '192.0.2.3'")
-print("set firewall group address-group somehosts address '203.0.113.55'")
-```
-
-```none
-#!/bin/vbash
-source /opt/vyatta/etc/functions/script-template
-configure
-source <(/config/scripts/setfirewallgroup.py)
-commit
-```
-
-
-## Execute configuration scripts
-
-In Linux, it is common practice to prefix system commands with `sudo`.
-
-In VyOS, if you prefix a script that modifies the configuration with `sudo`
-(see the code snippet below), subsequent manual configuration changes fail with
-the `Set failed` error. Recovery requires a system reboot.
-
-```none
-sudo ./myscript.sh # Modifies config
-configure
-set ... # Any configuration parameter
-```
-
-To avoid this issue, run scripts under the `vyattacfg` group using the `sg`
-command:
-
-```none
-sg vyattacfg -c ./myscript.sh
-```
-
-To ensure the script is executed under the `vyattacfg` group, safeguard it as
-follows:
-
-```none
-if [ "$(id -g -n)" != 'vyattacfg' ] ; then
-    exec sg vyattacfg -c "/bin/vbash $(readlink -f $0) $@"
-fi
-```
-
-
-## Executing pre-hooks/post-hooks scripts
-
-VyOS allows you to run custom scripts **before** and **after** each commit.
-
-Place your custom scripts in the following default directories:
-
-```none
-/config/scripts/commit/pre-hooks.d   - Directory with scripts that run before
-                                       each commit.
-
-/config/scripts/commit/post-hooks.d  - Directory with scripts that run after
-                                       each commit.
-```
-
-Scripts run in alphabetical order. Filenames must consist only of ASCII letters
-(upper and lowercase), digits (0-9), underscores (\_), and hyphens (-). No other
-characters are allowed.
-
-:::{note}
-Custom scripts are executed **without** root privileges. Prefix
-specific commands with `sudo` in your script when required.
-:::
-
-The following example shows the output after executing a post-hook script
-that runs the `show interfaces` command:
-
-```none
-vyos@vyos# set interfaces ethernet eth1  address 192.0.2.3/24
-vyos@vyos# commit
-Codes: S - State, L - Link, u - Up, D - Down, A - Admin Down
-Interface        IP Address                        S/L  Description
----------        ----------                        ---  -----------
-eth0             198.51.100.10/24                  u/u
-eth1             192.0.2.3/24                      u/u
-eth2             -                                 u/u
-eth3             -                                 u/u
-lo               203.0.113.5/24                    u/u
-```
-
-
-## Preconfig script on boot
-
-VyOS runs `/config/scripts/vyos-preconfig-bootup.script` at boot, **before**
-the system configuration is applied.
-
-Use this script to apply **pre-configuration** workarounds for unresolved bugs
-or enhancements not yet available in VyOS.
-
-The default script contains the following:
-
-```none
-#!/bin/sh
-# This script is executed at boot time before VyOS configuration is applied.
-# Any modifications required to work around unfixed bugs or use
-# services not available through the VyOS CLI system can be placed here.
-```
-
-
-## Postconfig script on boot
-
-VyOS runs `/config/scripts/vyos-postconfig-bootup.script` at boot, **after**
-the system configuration is applied.
-
-Use this script to apply **post-configuration** workarounds for unresolved bugs
-or enhancements not yet available in VyOS.
-
-The default script contains the following:
-
-```none
-#!/bin/sh
-# This script is executed at boot time after VyOS configuration is fully
-# applied. Any modifications required to work around unfixed bugs or use
-# services not available through the VyOS CLI system can be placed here.
-```
-
-:::{warning}
-For configuration or upgrade management issues, modify this script
-only as a last resort. Always try CLI-based solutions first.
-:::
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