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/**
*
* @file NginxCertbot.cpp
* @author Gaspard Kirira
*
* Copyright 2026, Gaspard Kirira. All rights reserved.
* https://github.com/vixcpp/vix
* Use of this source code is governed by a MIT license
* that can be found in the License file.
*
* Vix.cpp
*/
#include <vix/cli/commands/proxy/NginxCertbot.hpp>
#include <vix/cli/commands/proxy/NginxGenerator.hpp>
#include <vix/cli/commands/proxy/NginxOutput.hpp>
#include <cstdlib>
#include <filesystem>
#include <fstream>
#include <iostream>
#include <string>
namespace fs = std::filesystem;
namespace vix::commands::proxy::nginx_certbot
{
namespace
{
std::string shell_quote(const std::string &value)
{
std::string out = "'";
for (char c : value)
{
if (c == '\'')
out += "'\\''";
else
out += c;
}
out += "'";
return out;
}
bool run_cmd(const std::string &cmd)
{
return std::system(cmd.c_str()) == 0;
}
fs::path default_certificate_path(const std::string &domain)
{
return fs::path("/etc/letsencrypt/live") / domain / "fullchain.pem";
}
fs::path default_certificate_key_path(const std::string &domain)
{
return fs::path("/etc/letsencrypt/live") / domain / "privkey.pem";
}
bool install_rendered_config(const NginxProxyConfig &cfg)
{
const std::string config = nginx_generator::render_config(cfg);
const fs::path tmp = fs::temp_directory_path() / (cfg.appName + ".nginx");
{
std::ofstream out(tmp);
if (!out)
{
nginx_output::error(
std::cerr,
"Failed to write temporary Nginx config: " + tmp.string());
return false;
}
out << config;
}
if (!run_cmd(
"sudo cp " +
shell_quote(tmp.string()) +
" " +
shell_quote(cfg.sitesAvailablePath.string())))
{
nginx_output::error(std::cerr, "Failed to install Nginx site config.");
run_cmd("rm -f " + shell_quote(tmp.string()));
return false;
}
run_cmd("rm -f " + shell_quote(tmp.string()));
if (!run_cmd(
"sudo ln -sfn " +
shell_quote(cfg.sitesAvailablePath.string()) +
" " +
shell_quote(cfg.sitesEnabledPath.string())))
{
nginx_output::error(std::cerr, "Failed to enable Nginx site.");
return false;
}
return true;
}
bool nginx_test()
{
if (!run_cmd("sudo nginx -t"))
{
nginx_output::error(std::cerr, "Nginx config is invalid.");
nginx_output::fix(std::cerr, "sudo nginx -t");
return false;
}
nginx_output::ok(std::cout, "nginx config is valid");
return true;
}
bool reload_or_start_nginx()
{
if (run_cmd("systemctl is-active --quiet nginx"))
{
if (!run_cmd("sudo systemctl reload nginx"))
{
nginx_output::error(std::cerr, "Failed to reload Nginx.");
nginx_output::fix(std::cerr, "sudo systemctl reload nginx");
return false;
}
nginx_output::ok(std::cout, "nginx reloaded");
return true;
}
if (!run_cmd("sudo systemctl start nginx"))
{
nginx_output::error(std::cerr, "Failed to start Nginx.");
nginx_output::fix(std::cerr, "sudo systemctl start nginx");
return false;
}
nginx_output::ok(std::cout, "nginx started");
return true;
}
NginxProxyConfig make_http_bootstrap_config(const NginxProxyConfig &cfg)
{
NginxProxyConfig http_cfg = cfg;
http_cfg.tlsEnabled = false;
http_cfg.certificatePath.clear();
http_cfg.certificateKeyPath.clear();
return http_cfg;
}
NginxProxyConfig make_final_tls_config(const NginxProxyConfig &cfg)
{
NginxProxyConfig tls_cfg = cfg;
tls_cfg.tlsEnabled = true;
if (tls_cfg.certificatePath.empty())
tls_cfg.certificatePath = default_certificate_path(tls_cfg.domain);
if (tls_cfg.certificateKeyPath.empty())
tls_cfg.certificateKeyPath = default_certificate_key_path(tls_cfg.domain);
return tls_cfg;
}
}
int run(const NginxProxyConfig &cfg)
{
nginx_output::print_init_summary(std::cout, cfg);
if (cfg.domain.empty())
{
nginx_output::error(std::cerr, "Missing proxy domain.");
nginx_output::fix(std::cerr, "add production.proxy.domain to vix.json");
return 1;
}
if (!run_cmd("command -v nginx >/dev/null 2>&1"))
{
nginx_output::error(std::cerr, "Nginx is not installed or not available in PATH.");
nginx_output::fix(std::cerr, "install nginx");
return 1;
}
if (!run_cmd("command -v certbot >/dev/null 2>&1"))
{
nginx_output::error(std::cerr, "Certbot is not installed or not available in PATH.");
nginx_output::fix(std::cerr, "sudo apt install certbot python3-certbot-nginx");
return 1;
}
nginx_output::ok(std::cout, "preparing temporary HTTP config for Certbot");
const NginxProxyConfig http_cfg = make_http_bootstrap_config(cfg);
if (!install_rendered_config(http_cfg))
return 1;
if (!nginx_test())
return 1;
if (!reload_or_start_nginx())
return 1;
const std::string certbot_cmd =
"sudo certbot --nginx -d " +
shell_quote(cfg.domain);
nginx_output::ok(std::cout, "running certbot for " + cfg.domain);
if (!run_cmd(certbot_cmd))
{
nginx_output::error(std::cerr, "Certbot failed.");
nginx_output::fix(std::cerr, certbot_cmd);
return 1;
}
nginx_output::ok(std::cout, "certificate issued or renewed");
const NginxProxyConfig tls_cfg = make_final_tls_config(cfg);
if (!fs::exists(tls_cfg.certificatePath))
{
nginx_output::error(
std::cerr,
"Let's Encrypt certificate was not found: " +
tls_cfg.certificatePath.string());
nginx_output::fix(std::cerr, "check certbot output and domain DNS records");
return 1;
}
if (!fs::exists(tls_cfg.certificateKeyPath))
{
nginx_output::error(
std::cerr,
"Let's Encrypt private key was not found: " +
tls_cfg.certificateKeyPath.string());
nginx_output::fix(std::cerr, "check certbot output and domain DNS records");
return 1;
}
nginx_output::ok(std::cout, "installing final Vix TLS proxy config");
if (!install_rendered_config(tls_cfg))
return 1;
if (!nginx_test())
return 1;
if (!reload_or_start_nginx())
return 1;
nginx_output::ok(std::cout, "Let's Encrypt integration completed: " + cfg.domain);
return 0;
}
}