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use std::fs::{File, OpenOptions};
use std::path::{Path, PathBuf};
use std::sync::atomic::{AtomicUsize, Ordering};
use std::sync::OnceLock;
use std::time::Duration;
const TEMP_PARENT: &str = "/tmp/zellij-test";
const TEST_ROOT_SUBDIRS: [&str; 8] = [
"sock", "home", "cache", "data", "config", "runtime", "cwd", "tmp",
];
static TEST_ROOT: OnceLock<PathBuf> = OnceLock::new();
static OWN_PROCESS_LOCK: OnceLock<File> = OnceLock::new();
static SESSION_COUNTER: AtomicUsize = AtomicUsize::new(0);
pub fn init() -> &'static Path {
TEST_ROOT
.get_or_init(|| {
let test_root = create_test_root();
isolate_process_environment(&test_root);
zellij_utils::logging::configure_logger();
test_root
})
.as_path()
}
fn create_test_root() -> PathBuf {
let parent = PathBuf::from(TEMP_PARENT);
std::fs::create_dir_all(&parent).unwrap();
hold_own_process_lock(&parent);
remove_roots_of_dead_test_processes(&parent);
let test_root = parent.join(std::process::id().to_string());
for subdir in TEST_ROOT_SUBDIRS {
std::fs::create_dir_all(test_root.join(subdir)).unwrap();
}
test_root
}
fn process_lock_path(parent: &Path, pid: u32) -> PathBuf {
parent.join(format!("{}.lock", pid))
}
fn hold_own_process_lock(parent: &Path) {
let lock_file = OpenOptions::new()
.create(true)
.write(true)
.open(process_lock_path(parent, std::process::id()))
.unwrap();
lock_file.lock().unwrap();
let _ = OWN_PROCESS_LOCK.set(lock_file);
}
fn remove_roots_of_dead_test_processes(parent: &Path) {
let Ok(entries) = std::fs::read_dir(parent) else {
return;
};
for entry in entries.flatten() {
let file_name = entry.file_name();
let Some(owner_pid) = file_name
.to_str()
.and_then(|name| name.strip_suffix(".lock"))
.and_then(|pid| pid.parse::<u32>().ok())
else {
continue;
};
if owner_pid == std::process::id() {
continue;
}
let Ok(lock_file) = OpenOptions::new().write(true).open(entry.path()) else {
continue;
};
if lock_file.try_lock().is_ok() {
let _ = std::fs::remove_dir_all(parent.join(owner_pid.to_string()));
let _ = std::fs::remove_file(entry.path());
let _ = lock_file.unlock();
}
}
}
fn isolate_process_environment(test_root: &Path) {
std::env::set_var("TMPDIR", test_root.join("tmp"));
std::env::set_var("ZELLIJ_SOCKET_DIR", test_root.join("sock"));
std::env::set_var("HOME", test_root.join("home"));
std::env::set_var("XDG_CACHE_HOME", test_root.join("cache"));
std::env::set_var("XDG_DATA_HOME", test_root.join("data"));
std::env::set_var("XDG_CONFIG_HOME", test_root.join("config"));
std::env::set_var("XDG_RUNTIME_DIR", test_root.join("runtime"));
std::env::remove_var("ZELLIJ");
std::env::remove_var("ZELLIJ_SESSION_NAME");
std::env::remove_var("ZELLIJ_CONFIG_FILE");
std::env::remove_var("ZELLIJ_CONFIG_DIR");
std::env::set_current_dir(test_root.join("cwd")).unwrap();
}
pub fn unique_session_name() -> String {
let session_index = SESSION_COUNTER.fetch_add(1, Ordering::Relaxed);
format!("test-{}", session_index)
}
pub struct ConcurrencySlot {
_slot_file: File,
}
fn is_truthy(value: &str) -> bool {
matches!(
value.trim().to_ascii_lowercase().as_str(),
"1" | "true" | "yes"
)
}
fn slot_count() -> usize {
if std::env::var("ZELLIJ_TEST_SERIAL")
.map(|v| is_truthy(&v))
.unwrap_or(false)
{
return 1;
}
if let Some(explicit) = std::env::var("ZELLIJ_TEST_CONCURRENCY")
.ok()
.and_then(|v| v.parse::<usize>().ok())
{
return explicit.max(1);
}
let cpus = std::thread::available_parallelism()
.map(|n| n.get())
.unwrap_or(4);
(cpus / 4).max(1)
}
pub fn acquire_concurrency_slot() -> ConcurrencySlot {
let slots = slot_count();
let slot_dir = PathBuf::from(TEMP_PARENT).join("concurrency-slots");
std::fs::create_dir_all(&slot_dir).unwrap();
loop {
for slot_index in 0..slots {
let slot_file = OpenOptions::new()
.create(true)
.write(true)
.open(slot_dir.join(format!("slot-{}", slot_index)))
.unwrap();
if slot_file.try_lock().is_ok() {
return ConcurrencySlot {
_slot_file: slot_file,
};
}
}
std::thread::sleep(Duration::from_millis(10));
}
}
pub const DEFAULT_TEST_CONFIG: &str = r#"
show_startup_tips false
show_release_notes false
session_serialization false
disable_session_metadata true
visual_bell false
mouse_mode false
advanced_mouse_actions false
pane_frame_style "titles"
theme "default"
"#;
pub fn write_config(session_name: &str, extra_config_kdl: &str) -> PathBuf {
let test_root = init();
let config_path = test_root
.join("config")
.join(format!("{}-config.kdl", session_name));
let contents = format!(
"{}\n{}\n",
defaults_overridden_by(extra_config_kdl),
extra_config_kdl
);
std::fs::write(&config_path, contents).unwrap();
config_path
}
fn defaults_overridden_by(extra_config_kdl: &str) -> String {
let overridden_keys: std::collections::HashSet<&str> = extra_config_kdl
.lines()
.filter_map(|line| line.split_whitespace().next())
.collect();
DEFAULT_TEST_CONFIG
.lines()
.filter(|line| {
line.split_whitespace()
.next()
.map_or(true, |key| !overridden_keys.contains(key))
})
.collect::<Vec<_>>()
.join("\n")
}
pub fn log_file_path() -> PathBuf {
init();
zellij_utils::consts::ZELLIJ_TMP_LOG_FILE.clone()
}
pub fn log_tail(max_lines: usize) -> String {
let contents = std::fs::read_to_string(log_file_path()).unwrap_or_default();
let lines: Vec<&str> = contents.lines().collect();
let start = lines.len().saturating_sub(max_lines);
lines[start..].join("\n")
}
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