nautilus-core 0.64.0

Core functionality for the Nautilus trading engine
Documentation 
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// -------------------------------------------------------------------------------------------------
//  Copyright (C) 2015-2026 Nautech Systems Pty Ltd. All rights reserved.
//  https://nautechsystems.io
//
//  Licensed under the GNU Lesser General Public License Version 3.0 (the "License");
//  You may not use this file except in compliance with the License.
//  You may obtain a copy of the License at https://www.gnu.org/licenses/lgpl-3.0.en.html
//
//  Unless required by applicable law or agreed to in writing, software
//  distributed under the License is distributed on an "AS IS" BASIS,
//  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
//  See the License for the specific language governing permissions and
//  limitations under the License.
// -------------------------------------------------------------------------------------------------

//! Build script for the `nautilus-core` crate.
//!
//! This script propagates version information through the `NAUTILUS_VERSION` and
//! `NAUTILUS_USER_AGENT` compile-time environment variables.

use std::path::PathBuf;

fn main() {
    println!("cargo:rerun-if-changed=build.rs");
    println!("cargo:rerun-if-changed=Cargo.toml");
    println!("cargo:rerun-if-changed=../Cargo.toml");
    println!("cargo:rerun-if-changed=../../python/pyproject.toml");

    // The Python manifest is unavailable when this crate builds from a published package
    let nautilus_version = "2.0.0rc5";

    if let Some(pyproject_version) = try_read_pyproject_version() {
        assert!(
            pyproject_version.starts_with(nautilus_version),
            "Version mismatch: pyproject.toml={pyproject_version}, hardcoded={nautilus_version}",
        );
    }

    // Set compile-time environment variables
    println!("cargo:rustc-env=NAUTILUS_VERSION={nautilus_version}");
    println!("cargo:rustc-env=NAUTILUS_USER_AGENT=NautilusTrader/{nautilus_version}");
}

fn try_read_pyproject_version() -> Option<String> {
    let crate_dir = PathBuf::from(env!("CARGO_MANIFEST_DIR"));
    let path = crate_dir
        .parent()
        .and_then(|p| p.parent())
        .map(|p| p.join("python/pyproject.toml"))?;

    if path.exists()
        && let Ok(contents) = std::fs::read_to_string(path)
        && let Ok(value) = toml::from_str::<toml::Value>(&contents)
        && let Some(version) = value
            .get("project")
            .and_then(|p| p.get("version"))
            .and_then(|v| v.as_str())
    {
        return Some(version.to_string());
    }

    None
}