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//! Run several bird invocations concurrently, each with its own fixture.
//!
//! Every thread builds an isolated `ResolvedPaths` rooted at its own
//! `TempDir`. Because the runner never reads `HOME` / `XDG_CONFIG_HOME`
//! itself, the threads do not race on process-global env vars. The
//! `tests/parallel_run.rs` regression covers the same shape at 16 threads.
//!
//! `--version` is a clap-handled short-circuit that prints directly to the
//! process stdout, bypassing the injected writers; that is why each
//! thread's printed `stdout=""` line shows an empty capture while the
//! `bird 0.1.x` banners still appear on the real stdout.
//!
//! Run with: `cargo run --example parallel_invocations`
//!
//! Expected exit: 0 if every thread's invocation exited 0.
use bird::config::{EnvOverrides, ResolvedPaths};
use std::process::ExitCode;
use std::thread;
use tempfile::TempDir;
const THREADS: usize = 8;
fn main() -> ExitCode {
let handles: Vec<_> = (0..THREADS)
.map(|i| {
thread::spawn(move || {
let tmp = TempDir::new().expect("example: tempdir");
let config_dir = tmp.path().join(".config").join("bird");
std::fs::create_dir_all(&config_dir).expect("example: create config dir");
let paths = ResolvedPaths {
config_dir: config_dir.clone(),
store_path: config_dir,
};
let mut stdout: Vec<u8> = Vec::new();
let mut stderr: Vec<u8> = Vec::new();
let exit = bird::cli::run_with_paths(
["bird", "--version"],
&mut stdout,
&mut stderr,
paths,
EnvOverrides::default(),
);
let stdout = String::from_utf8_lossy(&stdout).into_owned();
println!("thread {}: exit={:?} stdout={:?}", i, exit, stdout.trim());
exit
})
})
.collect();
let mut all_ok = true;
for handle in handles {
let exit = handle.join().expect("example: thread panicked");
// ExitCode does not impl PartialEq; compare via Debug like the runner tests.
if format!("{:?}", exit) != format!("{:?}", ExitCode::SUCCESS) {
all_ok = false;
}
}
if all_ok {
ExitCode::SUCCESS
} else {
ExitCode::FAILURE
}
}