//! Write the OpenAPI spec to `openapi.json` at the crate root.
//!
//! The spec is a checked-in artifact rather than something only served at
//! runtime, because it is the SyncKit wire contract and the client lives in
//! another repo. A file can be vendored and diffed; a live endpoint cannot be
//! reached from `synckit-client`'s test suite.
//!
//! `openapi::tests::committed_spec_matches_generated` fails when this output is
//! stale, so the regeneration step is:
//!
//! ```sh
//! cargo run --bin export-openapi
//! ```
//!
//! `--stdout` writes the same bytes to standard output instead of the file, so
//! a caller can diff the generated spec against a committed copy without
//! touching the source tree. The pre-commit hook uses it to compare against the
//! *staged* `openapi.json`, which is the copy the commit would actually carry.

use std::io::Write as _;

fn main() -> std::io::Result<()> {
    let spec = makenotwork::openapi::spec_json();

    if std::env::args().any(|a| a == "--stdout") {
        std::io::stdout().write_all(spec.as_bytes())?;
        return Ok(());
    }

    let path = concat!(env!("CARGO_MANIFEST_DIR"), "/openapi.json");
    let mut file = std::fs::File::create(path)?;
    file.write_all(spec.as_bytes())?;
    println!("wrote {path}");
    Ok(())
}