zoi-lua 1.25.3

Advanced Package Manager & Environment Orchestrator
Documentation 
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use mlua::{self, Lua, LuaSerdeExt, Table};

/// Exposes data parsing utilities to the Lua environment.
///
/// These helpers allow package scripts to easily consume structured data
/// commonly found in upstream projects:
/// - `json`/`yaml`/`toml`: Parsers for structured configuration files.
/// - `checksumFile`: A specialized parser for standard checksum files (e.g.
///   `sha256sums`).
///
/// These utilities return native Lua tables, allowing for idiomatic
/// manipulation of complex data within the package script.
/// Adds data parsing utilities (JSON, YAML, TOML, checksum files) to the
/// `UTILS.PARSE` table.
///
/// # Errors
///
/// Returns an error if the `UTILS` table cannot be found or if setting the
/// `PARSE` table fails.
pub fn add_parse_util(lua: &Lua) -> Result<(), mlua::Error> {
    let parse_table = lua.create_table()?;

    let json_fn = lua.create_function(|lua, json_str: String| {
        let value: serde_json::Value = serde_json::from_str(&json_str)
            .map_err(|e| mlua::Error::RuntimeError(e.to_string()))?;
        lua.to_value(&value)
    })?;
    parse_table.set("json", json_fn)?;

    let yaml_fn = lua.create_function(|lua, yaml_str: String| {
        let value: serde_yaml::Value = serde_yaml::from_str(&yaml_str)
            .map_err(|e| mlua::Error::RuntimeError(e.to_string()))?;
        lua.to_value(&value)
    })?;
    parse_table.set("yaml", yaml_fn)?;

    let toml_fn = lua.create_function(|lua, toml_str: String| {
        let value: toml::Value = toml::from_str(&toml_str)
            .map_err(|e| mlua::Error::RuntimeError(e.to_string()))?;
        lua.to_value(&value)
    })?;
    parse_table.set("toml", toml_fn)?;

    let checksum_fn =
        lua.create_function(|_, (content, file_name): (String, String)| {
            for line in content.lines() {
                let parts: Vec<&str> = line.split_whitespace().collect();
                if parts.len() == 2 && parts.get(1) == Some(&file_name.as_str())
                {
                    return Ok(parts.first().map(ToString::to_string));
                }
            }
            Ok(None)
        })?;
    parse_table.set("checksumFile", checksum_fn)?;

    let utils_table: Table = lua.globals().get("UTILS")?;
    utils_table.set("PARSE", parse_table)?;

    Ok(())
}