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// use log::{debug, info};
// use regex::Regex;
// use russh::{
// ChannelMsg,
// client::{self},
// keys::PrivateKeyWithHashAlg,
// };
// use std::{io, path::Path, string::FromUtf8Error, sync::LazyLock};
// use tokio::process::Command;
//
// use thiserror::Error;
//
// use std::error::Error as StdError;
//
// #[derive(Error, Debug)]
// pub enum ExecutorError<E: StdError> {
// #[error("failed to execute command")]
// ExecuteFailed(#[source] E),
// #[error("failed to create command executor")]
// CreationFailed(#[source] E),
// #[error("empty command")]
// EmptyCommand,
// #[error("command returned non-zero exit code: {0} {1}")]
// NonZeroExitCode(u32, String),
// #[error("command returned no response")]
// NoResponse(String),
// #[error("failed to write file")]
// FileWriteFailed(#[source] E),
// #[error("failed to create directory")]
// MkdirsFailed(#[source] E),
// }
//
// pub trait Executor {
// type Error: StdError;
// async fn mkdirs<D: AsRef<Path>>(&self, dir: D) -> Result<(), ExecutorError<Self::Error>>;
// async fn execute(&self, cmd: &str) -> Result<String, ExecutorError<Self::Error>>;
//
// async fn write_file<F: AsRef<Path>>(
// &self,
// file: F,
// content: &str,
// ) -> Result<(), ExecutorError<Self::Error>>;
// }
//
// pub struct LocalExecutor;
//
// impl LocalExecutor {
// pub fn new() -> Self {
// Self
// }
// }
//
// impl Executor for LocalExecutor {
// type Error = io::Error;
//
// async fn execute(&self, cmd: &str) -> Result<String, ExecutorError<Self::Error>> {
// let mut args = cmd.trim().split_whitespace();
// let cmd = args.next().ok_or(ExecutorError::EmptyCommand)?;
// let mut cmd = Command::new(cmd);
// cmd.args(args);
//
// let output = cmd
// .output()
// .await
// .map_err(|e| ExecutorError::ExecuteFailed(e))?;
// let stdout = String::from_utf8_lossy(&output.stdout);
// Ok(stdout.to_string())
// }
//
// async fn write_file<F: AsRef<Path>>(
// &self,
// file: F,
// content: &str,
// ) -> Result<(), ExecutorError<Self::Error>> {
// std::fs::write(&file, content).map_err(|e| ExecutorError::FileWriteFailed(e))?;
// debug!("wrote local file {}", file.as_ref().display());
// Ok(())
// }
//
// async fn mkdirs<D: AsRef<Path>>(&self, dir: D) -> Result<(), ExecutorError<Self::Error>> {
// std::fs::create_dir_all(dir).map_err(|e| ExecutorError::MkdirsFailed(e.into()))
// }
// }
//
// struct SshClient {}
//
// impl russh::client::Handler for SshClient {
// type Error = russh::Error;
//
// async fn check_server_key(
// &mut self,
// _server_public_key: &russh::keys::ssh_key::PublicKey,
// ) -> Result<bool, Self::Error> {
// Ok(true)
// }
// }
//
// pub struct SshExecutor {
// session: russh::client::Handle<SshClient>,
// }
//
// #[derive(Error, Debug)]
// pub enum SshExecutorError {
// #[error("failed to create stream")]
// StreamCreationFailed(#[source] io::Error),
// #[error("failed to connect via ssh")]
// ConnectionFailed(#[source] russh::Error),
// #[error("failed to read config")]
// ConfigParsingFailed(#[source] russh_config::Error),
// #[error("empty proxy command")]
// EmptyProxyCommand,
// #[error("failed to expand command")]
// CommandExpansionFailed(#[from] ExpandCommandError),
// #[error("ssh error")]
// SshError(#[from] russh::Error),
// #[error("failed to load private key at: {0}")]
// PrivateKeyLoadingError(String, #[source] russh::keys::Error),
// #[error("io error")]
// IoError(#[from] io::Error),
// #[error("test command failed")]
// TestCommandFailed,
// }
//
// use SshExecutorError::*;
// // use russh::cipher;
// // const CIPHER_ORDER: &[cipher::Name] = &[];
//
// impl SshExecutor {
// pub async fn new(host: &str) -> Result<Self, SshExecutorError> {
// let key_path = shellexpand::full("~/.ssh/id_rsa").unwrap().to_string();
// let private_key = russh::keys::load_secret_key(&key_path, None)
// .map_err(|e| PrivateKeyLoadingError(key_path, e))?;
//
// let ssh_config =
// russh_config::parse_home(host).map_err(|e| SshExecutorError::ConfigParsingFailed(e))?;
// debug!("found ssh config : {ssh_config:#?}");
//
// let stream = match &ssh_config.proxy_command {
// Some(proxy_command) => {
// let proxy_command = proxy_command.trim();
// if proxy_command.is_empty() {
// return Err(SshExecutorError::EmptyProxyCommand);
// }
// let proxy_command = proxy_command
// .replace("%h", host)
// .replace("%p", &ssh_config.port.to_string());
// let proxy_command = expand_command(&proxy_command).await?.replace("\"", "");
// debug!("Proxy Command: {proxy_command}");
// let pieces: Vec<_> = proxy_command.split(" ").collect();
// let cmd = pieces[0];
// let args = &pieces[1..];
// russh_config::Stream::proxy_command(cmd, args)
// .await
// .map_err(|e| SshExecutorError::StreamCreationFailed(e))?
// }
// None => todo!(),
// };
//
// let config = client::Config {
// preferred: russh::Preferred {
// // kex: (),
// // key: (),
// // cipher: CIPHER_ORDER.into(),
// // mac: (),
// // compression: (),
// ..Default::default()
// },
// ..Default::default()
// };
// let sh = SshClient {};
// let mut session = client::connect_stream(config.into(), stream, sh)
// .await
// .map_err(|e| SshExecutorError::ConnectionFailed(e))?;
// // Authenticate public key
// session
// .authenticate_publickey(
// ssh_config.user,
// PrivateKeyWithHashAlg::new(
// private_key.into(),
// session.best_supported_rsa_hash().await?.flatten(),
// ),
// )
// .await?;
//
// debug!("running test command");
// let mut channel = session.channel_open_session().await?;
// channel.exec(true, "whoami").await?;
// let mut code = None;
// let mut user = String::new();
// // Receive response
// loop {
// // There's an event available on the session channel
// let Some(msg) = channel.wait().await else {
// break;
// };
// match msg {
// // Write data to the terminal
// ChannelMsg::Data { ref data } => {
// user = String::from_utf8_lossy(data).into();
// }
// // The command has returned an exit code
// ChannelMsg::ExitStatus { exit_status } => {
// code = Some(exit_status);
// // cannot leave the loop immediately, there might still be more data to receive
// }
// _ => {}
// }
// }
//
// match code {
// Some(code) if code == 0 => {
// debug!("test command succeeded");
// info!("connected to {host} as {user}");
// Ok(Self { session })
// }
// _ => Err(TestCommandFailed),
// }
// }
// }
//
// impl Executor for SshExecutor {
// type Error = SshExecutorError;
//
// async fn mkdirs<D: AsRef<Path>>(&self, dir: D) -> Result<(), ExecutorError<Self::Error>> {
// self.execute(&format!("mkdir -p {}", dir.as_ref().display()))
// .await?;
// Ok(())
// }
//
// async fn execute(&self, cmd: &str) -> Result<String, ExecutorError<SshExecutorError>> {
// let mut channel = self
// .session
// .channel_open_session()
// .await
// .map_err(|e| ExecutorError::ExecuteFailed(e.into()))?;
// debug!(
// "running command: {}",
// if cmd.starts_with("echo") {
// "echo [..]"
// } else {
// cmd
// }
// );
// channel
// .exec(true, cmd)
// .await
// .map_err(|e| ExecutorError::ExecuteFailed(e.into()))?;
// let mut code = None;
// let mut res = String::new();
// // Receive response
// loop {
// // There's an event available on the session channel
// let Some(msg) = channel.wait().await else {
// break;
// };
// match msg {
// // Write data to the terminal
// ChannelMsg::Data { ref data } => {
// let data = String::from_utf8_lossy(data);
// res.push_str(&data);
// debug!("received data: {data}");
// }
// // The command has returned an exit code
// ChannelMsg::ExitStatus { exit_status } => {
// code = Some(exit_status);
// debug!("exit status: {exit_status}");
// // cannot leave the loop immediately, there might still be more data to receive
// }
// _ => {}
// }
// }
//
// match code {
// Some(code) if code == 0 => Ok(res),
// Some(code) => Err(ExecutorError::NonZeroExitCode(code, cmd.to_string())),
// _ => Err(ExecutorError::NoResponse(cmd.to_string())),
// }
// }
//
// async fn write_file<F: AsRef<Path>>(
// &self,
// file: F,
// content: &str,
// ) -> Result<(), ExecutorError<Self::Error>> {
// let escaped_content = content.replace("\'", "\\\'");
// self.execute(&format!(
// "echo -n '{escaped_content}' > {}",
// file.as_ref().display()
// ))
// .await?;
// Ok(())
// }
// }
//
// static SHELL_COMMAND_EXPANSION_RE: LazyLock<Regex> =
// LazyLock::new(|| Regex::new(r"(.*?)\$\((.*?)\)").unwrap());
//
// #[derive(Error, Debug)]
// pub enum ExpandCommandError {
// #[error("failed to execute subcommand")]
// ExecutionFailed(#[from] io::Error),
// #[error("failed to read subcommand output as utf8")]
// OutputFailed(#[from] FromUtf8Error),
// }
//
// async fn expand_command(cmd: &str) -> Result<String, ExpandCommandError> {
// let mut new = String::with_capacity(cmd.len());
// let mut last = 0;
//
// for captures in SHELL_COMMAND_EXPANSION_RE.captures_iter(cmd) {
// new.push_str(&captures[1]);
// let sub_command = &captures[2];
// let output = Command::new("sh")
// .arg("-c")
// .arg(sub_command)
// .output()
// .await?;
//
// let res = String::from_utf8(output.stdout)?;
// new.push_str(res.trim());
//
// last = captures.get(0).unwrap().end();
// }
//
// new.push_str(&cmd[last..]);
// Ok(new)
// }