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// NOTE: Ts file contains setting localisation by environment variables
// Main logic implemented but how i think it can contain with broken logic or checks
// At least if check failed it set C.UTF8 (fallback locale)
use crate::host::timezone::set_timezone;
use crate::log::{log_success, log_warning};
use std::fs;
use std::io::Write;
use std::process::Command;
/// Main function which setting system locale.
///
/// Logic && Checks
/// 1. Reading /etc/default/locale to find needed language.
/// If it broken/has syntax errors skipping this step
/// 2. Checking for locale avalible (also switching `-` and `_`),
/// If not uses fallback locale.
///
pub fn set_locale(locale: Option<String>) -> Result<(), Box<dyn std::error::Error>> {
let loc = match locale {
Some(l) => l,
None => {
if let Ok(content) = fs::read_to_string("/etc/default/locale") {
for line in content.lines() {
if line.starts_with("LANG=") {
let parts: Vec<&str> = line.split('=').collect();
if parts.len() >= 2 {
let lang_val = parts[1];
let clean_lang = lang_val.trim_matches('"').trim_matches('\'');
if !clean_lang.is_empty() {
return set_system_locale(clean_lang);
}
}
}
}
}
if let Ok(lang_env) = std::env::var("LANG")
&& !lang_env.is_empty()
{
return set_system_locale(&lang_env);
}
if locale_exists("C.UTF-8") {
"C.UTF-8".to_string()
} else if locale_exists("en_US.UTF-8") {
"en_US.UTF-8".to_string()
} else {
"C".to_string()
}
}
};
set_system_locale(&loc)
}
fn set_system_locale(locale: &str) -> Result<(), Box<dyn std::error::Error>> {
if !locale_exists(locale) {
log_warning(&format!(
"Locale '{}' not found in system, trying alternatives",
locale
));
let variants = vec![
format!("{}.UTF-8", locale),
locale.replace('_', "-"), // Sometimes locales are in form en-US
format!("{}.UTF-8", locale.replace('_', "-")),
];
for variant in variants {
if locale_exists(&variant) {
log_success(&format!("Using alternative locale: {}", variant));
return set_system_locale_impl(&variant);
}
}
log_warning("No matching locale found, using C.UTF-8 as fallback");
return set_system_locale_impl("C.UTF-8");
}
set_system_locale_impl(locale)
}
fn set_system_locale_impl(locale: &str) -> Result<(), Box<dyn std::error::Error>> {
unsafe {
std::env::set_var("LANG", locale);
std::env::set_var("LC_ALL", locale);
std::env::set_var("LC_CTYPE", locale);
std::env::set_var("LC_NUMERIC", locale);
std::env::set_var("LC_TIME", locale);
std::env::set_var("LC_COLLATE", locale);
std::env::set_var("LC_MONETARY", locale);
std::env::set_var("LC_MESSAGES", locale);
std::env::set_var("LC_PAPER", locale);
std::env::set_var("LC_NAME", locale);
std::env::set_var("LC_ADDRESS", locale);
std::env::set_var("LC_TELEPHONE", locale);
std::env::set_var("LC_MEASUREMENT", locale);
std::env::set_var("LC_IDENTIFICATION", locale);
}
if let Ok(mut file) = std::fs::OpenOptions::new()
.create(true)
.write(true)
.truncate(true)
.open("/etc/default/locale")
{
writeln!(file, "# Generated by Vigil init system")?;
writeln!(file, "LANG=\"{}\"", locale)?;
writeln!(file, "LC_ALL=\"{}\"", locale)?;
file.flush()?;
} else {
log_warning("Could not write to /etc/default/locale, locale settings may not persist");
}
log_success(&format!("Locale set to {}", locale));
Ok(())
}
fn locale_exists(locale: &str) -> bool {
if let Ok(output) = Command::new("locale").arg("-a").output() {
let output_str = String::from_utf8_lossy(&output.stdout);
output_str.lines().any(|line| line.trim() == locale)
} else {
let locale_archive_path = "/usr/lib/locale/locale-archive".to_string();
let locale_dir_path = "/usr/lib/locale/".to_string();
std::path::Path::new(&locale_archive_path).exists()
|| std::path::Path::new(&locale_dir_path).exists()
}
}
pub fn set_system_localization(
timezone: Option<String>,
locale: Option<String>,
) -> Result<(), Box<dyn std::error::Error>> {
if let Err(e) = set_timezone(timezone) {
log_warning(&format!("Failed to set timezone: {}", e));
}
if let Err(e) = set_locale(locale) {
log_warning(&format!("Failed to set locale: {}", e));
}
Ok(())
}
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