torchbear 0.11.5

Lua programming environment in Rust
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use rlua::{self, Lua, UserData, UserDataMethods};

struct SplitDiff(splitdiff_rs::SplitDiff);

impl UserData for SplitDiff {
    fn add_methods<'lua, M: UserDataMethods<'lua, Self>>(methods: &mut M) {
        methods.add_method("data", |_, this, _: ()| {
            let data = this.0.process().map_err(rlua::Error::external)?;
            let mut output = Vec::new();
            for (i, (path, patches)) in data.0.iter().enumerate() {
                output.push(format!("File {}: {}", i + 1, path));
                for (j, patch) in patches.iter().enumerate() {
                    output.push(format!("Patch {}:", j + 1));
                    for line in patch.iter() {
                        output.push(format!("{}", line));
                    }
                }
            }
            Ok(output)
        });
    }
}

pub fn init(lua: &Lua) -> crate::Result<()> {
    let module = lua.create_table()?;
    module.set(
        "new",
        lua.create_function(|_, patch: String| {
            Ok(SplitDiff(splitdiff_rs::SplitDiff::new(&patch)))
        })?,
    )?;
    let g = lua.globals();
    g.set("splitdiff", module)?;
    Ok(())
}