build.rs

use anyhow::Result;

fn main() -> Result<()> {
    println!("cargo::rerun-if-changed=../openapi_spec/firecrest_3.1.yaml");
    // convert to json in temp dir
    let f = std::fs::File::open("../openapi_spec/firecrest_3.1.yaml")?;
    let json_value: serde_json::Value = serde_yaml::from_reader(f)?;
    let out = tempfile::Builder::new()
        .suffix(".json")
        .disable_cleanup(true)
        .tempfile()?;
    let outpath = out.path();
    let outpath = dbg!(outpath);
    let o = std::fs::File::create(outpath)?;
    serde_json::to_writer_pretty(o, &json_value)?;
    std::process::Command::new("oas3-gen")
        .arg("generate")
        .arg("-i")
        .arg(outpath.to_str().unwrap())
        .arg("-o")
        .arg("./src/types.rs")
        .spawn()
        .expect("oas3-gen failed to run, if it's missing please install with 'cargo install oas3-gen@0.21.1'")
        .wait()?;
    // we need to add an into clause because the defaults in the openapi spec are weird
    let content = std::fs::read_to_string("./src/types.rs")?;
    let content = content.replace(
        "default(Some(\"gzip\".to_string())",
        "default(Some(\"gzip\".to_string().into())",
    );
    // remove source as it's a temporary file and we don't want to change it every time the build runs, even if
    // there are no changes
    let content = content
        .lines()
        .filter(|l| !l.starts_with("//! Source: "))
        .collect::<Vec<&str>>()
        .join("\n");
    let content = format!(
        "// @generated by oas3-gen
        #![allow(clippy::all)]
        #![allow(dead_code)]
        {}",
        content
    );
    std::fs::write("./src/types.rs", content)?;
    // format file
    std::process::Command::new("cargo")
        .arg("+nightly")
        .arg("fmt")
        .arg("--")
        .arg("./src/types.rs")
        .spawn()
        .expect("cargo couldn't format the file")
        .wait()?;
    Ok(())
}