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// SPDX-FileCopyrightText: 2020 Serokell <https://serokell.io/>
//
// SPDX-License-Identifier: MPL-2.0
use clap::Clap;
use std::process::Stdio;
use tokio::process::Command;
use std::path::Path;
extern crate pretty_env_logger;
#[macro_use]
extern crate log;
#[macro_use]
extern crate serde_derive;
#[macro_use]
mod utils;
/// Activation portion of the simple Rust Nix deploy tool
#[derive(Clap, Debug)]
#[clap(version = "1.0", author = "notgne2 <gen2@gen2.space>")]
struct Opts {
profile_path: String,
closure: String,
/// Command for activating the given profile
#[clap(long)]
activate_cmd: Option<String>,
/// Command for bootstrapping
#[clap(long)]
bootstrap_cmd: Option<String>,
/// Auto rollback if failure
#[clap(long)]
auto_rollback: bool,
}
pub async fn activate(
profile_path: String,
closure: String,
activate_cmd: Option<String>,
bootstrap_cmd: Option<String>,
auto_rollback: bool,
) -> Result<(), Box<dyn std::error::Error>> {
info!("Activating profile");
Command::new("nix-env")
.arg("-p")
.arg(&profile_path)
.arg("--set")
.arg(&closure)
.stdout(Stdio::null())
.spawn()?
.await?;
if let (Some(bootstrap_cmd), false) = (bootstrap_cmd, !Path::new(&profile_path).exists()) {
let bootstrap_status = Command::new("bash")
.arg("-c")
.arg(&bootstrap_cmd)
.env("PROFILE", &profile_path)
.stdout(Stdio::null())
.stderr(Stdio::null())
.status()
.await;
match bootstrap_status {
Ok(s) if s.success() => (),
_ => {
tokio::fs::remove_file(&profile_path).await?;
good_panic!("Failed to execute bootstrap command");
}
}
}
if let Some(activate_cmd) = activate_cmd {
let activate_status = Command::new("bash")
.arg("-c")
.arg(&activate_cmd)
.env("PROFILE", &profile_path)
.status()
.await;
match activate_status {
Ok(s) if s.success() => (),
_ if auto_rollback => {
error!("Failed to execute activation command");
let nix_env_rollback_exit_status = Command::new("nix-env")
.arg("-p")
.arg(&profile_path)
.arg("--rollback")
.stdout(Stdio::null())
.stderr(Stdio::null())
.status()
.await?;
if !nix_env_rollback_exit_status.success() {
good_panic!("`nix-env --rollback` failed");
}
let nix_env_list_generations_out = Command::new("nix-env")
.arg("-p")
.arg(&profile_path)
.arg("--list-generations")
.output()
.await?;
if !nix_env_list_generations_out.status.success() {
good_panic!("Listing `nix-env` generations failed");
}
let generations_list = String::from_utf8(nix_env_list_generations_out.stdout)?;
let last_generation_line = generations_list
.lines()
.last()
.expect("Expected to find a generation in list");
let last_generation_id = last_generation_line
.split_whitespace()
.next()
.expect("Expected to get ID from generation entry");
debug!("Removing generation entry {}", last_generation_line);
warn!("Removing generation by ID {}", last_generation_id);
let nix_env_delete_generation_exit_status = Command::new("nix-env")
.arg("-p")
.arg(&profile_path)
.arg("--delete-generations")
.arg(last_generation_id)
.stdout(Stdio::null())
.stderr(Stdio::null())
.status()
.await?;
if !nix_env_delete_generation_exit_status.success() {
good_panic!("Failed to delete failed generation");
}
// TODO: Find some way to make sure this command never changes, otherwise this will not work
let re_activate_exit_status = Command::new("bash")
.arg("-c")
.arg(&activate_cmd)
.status()
.await?;
if !re_activate_exit_status.success() {
good_panic!("Failed to re-activate the last generation");
}
std::process::exit(1);
}
_ => {}
}
}
Ok(())
}
#[tokio::main]
async fn main() -> Result<(), Box<dyn std::error::Error>> {
if std::env::var("DEPLOY_LOG").is_err() {
std::env::set_var("DEPLOY_LOG", "info");
}
pretty_env_logger::init_custom_env("DEPLOY_LOG");
let opts: Opts = Opts::parse();
activate(
opts.profile_path,
opts.closure,
opts.activate_cmd,
opts.bootstrap_cmd,
opts.auto_rollback,
)
.await?;
Ok(())
}
|
