Function compile_path

prqlc/prqlc/src/cli/watch.rs:96–136

(path: &Path, opt: &prqlc::Options)

}

fn compile_path(path: &Path, opt: &prqlc::Options) -> Result<()> {
    // filter to only .prql files
    if path.extension() != Some(OsStr::new("prql")) {
        return Ok(());
    }

    let sql_path = path.with_extension("sql");
    let prql_path = path;

    // read
    let Some(prql_string) = fs::read_to_string(prql_path).ok() else {
        // file may not exist, because this may have been a delete event
        return Ok(());
    };
    if prql_string.is_empty() {
        return Ok(());
    }

    // pre-process Jinja
    let (prql_string, jinja_context) = jinja::pre_process(&prql_string)?;

    // compile
    println!("Compiling {}", prql_path.display());
    let sql_string = match prqlc::compile(&prql_string, opt) {
        Ok(sql_string) => sql_string,
        Err(errs) => {
            for err in errs.inner {
                println!("{err}");
            }
            return Err(anyhow!("failed to compile"));
        }
    };

    // post-process Jinja
    let sql_string = jinja::post_process(&sql_string, jinja_context);

    // write
    fs::write(sql_path, sql_string)?;

    Ok(())
}