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// SPDX-FileCopyrightText: 2020 Serokell <https://serokell.io/>
//
// SPDX-License-Identifier: MPL-2.0
use std::borrow::Cow;
use tokio::process::Command;
use thiserror::Error;
fn build_activate_command(
activate_path_str: String,
sudo: &Option<String>,
profile_path: &str,
closure: &str,
auto_rollback: bool,
temp_path: &Cow<str>,
confirm_timeout: u16,
magic_rollback: bool,
) -> String {
let mut self_activate_command = format!(
"{} '{}' '{}' --temp-path {} --confirm-timeout {}",
activate_path_str, profile_path, closure, temp_path, confirm_timeout
);
if magic_rollback {
self_activate_command = format!("{} --magic-rollback", self_activate_command);
}
if auto_rollback {
self_activate_command = format!("{} --auto-rollback", self_activate_command);
}
if let Some(sudo_cmd) = &sudo {
self_activate_command = format!("{} {}", sudo_cmd, self_activate_command);
}
self_activate_command
}
#[test]
fn test_activation_command_builder() {
let activate_path_str = "/blah/bin/activate".to_string();
let sudo = Some("sudo -u test".to_string());
let profile_path = "/blah/profiles/test";
let closure = "/blah/etc";
let auto_rollback = true;
let temp_path = &"/tmp/deploy-rs".into();
let confirm_timeout = 30;
let magic_rollback = true;
assert_eq!(
build_activate_command(
activate_path_str,
&sudo,
profile_path,
closure,
auto_rollback,
temp_path,
confirm_timeout,
magic_rollback
),
"sudo -u test /blah/bin/activate '/blah/profiles/test' '/blah/etc' --temp-path /tmp/deploy-rs --confirm-timeout 30 --magic-rollback --auto-rollback"
.to_string(),
);
}
#[derive(Error, Debug)]
pub enum DeployProfileError {
#[error("Failed to calculate activate bin path from deploy bin path: {0}")]
DeployPathToActivatePathError(#[from] super::DeployPathToActivatePathError),
#[error("Failed to run activation command over SSH: {0}")]
SSHActivateError(std::io::Error),
#[error("Activation over SSH resulted in a bad exit code: {0:?}")]
SSHActivateExitError(Option<i32>),
#[error("Failed to run confirmation command over SSH (the server should roll back): {0}")]
SSHConfirmError(std::io::Error),
#[error(
"Confirming activation over SSH resulted in a bad exit code (the server should roll back): {0:?}"
)]
SSHConfirmExitError(Option<i32>),
}
pub async fn deploy_profile(
deploy_data: &super::DeployData<'_>,
deploy_defs: &super::DeployDefs<'_>,
) -> Result<(), DeployProfileError> {
info!(
"Activating profile `{}` for node `{}`",
deploy_data.profile_name, deploy_data.node_name
);
let activate_path_str = super::deploy_path_to_activate_path_str(&deploy_defs.current_exe)?;
let temp_path: Cow<str> = match &deploy_data.merged_settings.temp_path {
Some(x) => x.into(),
None => "/tmp/deploy-rs".into(),
};
let confirm_timeout = deploy_data.merged_settings.confirm_timeout.unwrap_or(30);
let magic_rollback = deploy_data.merged_settings.magic_rollback.unwrap_or(true);
let auto_rollback = deploy_data.merged_settings.auto_rollback.unwrap_or(true);
let self_activate_command = build_activate_command(
activate_path_str,
&deploy_defs.sudo,
&deploy_defs.profile_path,
&deploy_data.profile.profile_settings.path,
auto_rollback,
&temp_path,
confirm_timeout,
magic_rollback,
);
debug!("Constructed activation command: {}", self_activate_command);
let hostname = match deploy_data.cmd_overrides.hostname {
Some(ref x) => x,
None => &deploy_data.node.node_settings.hostname,
};
let mut c = Command::new("ssh");
let mut ssh_command = c
.arg("-t")
.arg(format!("ssh://{}@{}", deploy_defs.ssh_user, hostname));
for ssh_opt in &deploy_data.merged_settings.ssh_opts {
ssh_command = ssh_command.arg(ssh_opt);
}
let ssh_exit_status = ssh_command
.arg(self_activate_command)
.status()
.await
.map_err(DeployProfileError::SSHActivateError)?;
match ssh_exit_status.code() {
Some(0) => (),
a => return Err(DeployProfileError::SSHActivateExitError(a)),
};
info!("Success activating!");
if magic_rollback {
info!("Attempting to confirm activation");
let mut c = Command::new("ssh");
let mut ssh_confirm_command = c.arg(format!("ssh://{}@{}", deploy_defs.ssh_user, hostname));
for ssh_opt in &deploy_data.merged_settings.ssh_opts {
ssh_confirm_command = ssh_confirm_command.arg(ssh_opt);
}
let lock_hash = &deploy_data.profile.profile_settings.path["/nix/store/".len()..];
let lock_path = format!("{}/activating-{}", temp_path, lock_hash);
let mut confirm_command = format!("rm {}", lock_path);
if let Some(sudo_cmd) = &deploy_defs.sudo {
confirm_command = format!("{} {}", sudo_cmd, confirm_command);
}
debug!(
"Attempting to run command to confirm deployment: {}",
confirm_command
);
let ssh_exit_status = ssh_confirm_command
.arg(confirm_command)
.status()
.await
.map_err(DeployProfileError::SSHConfirmError)?;
match ssh_exit_status.code() {
Some(0) => (),
a => return Err(DeployProfileError::SSHConfirmExitError(a)),
};
info!("Deployment confirmed.");
}
Ok(())
}
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