burn-lm-cli 0.0.1

Burn Large Models Engine - CLI.
Documentation 
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use std::collections::BTreeMap;

use comfy_table::{Cell, Table};
use strum::IntoEnumIterator;

use crate::backends::BackendValues;

pub(crate) fn create() -> clap::Command {
    clap::Command::new("backends").about("List all available Burn backends")
}

pub(crate) fn handle() -> super::HandleCommandResult {
    let mut backends: BTreeMap<String, Vec<String>> = BTreeMap::new();
    for backend in BackendValues::iter() {
        let backend_string = backend.to_string();
        // prefix is for sorting, prefix can be duplicated
        let key = if backend_string.starts_with("candle") {
            "[5]Candle"
        } else if backend_string.starts_with("cuda") {
            "[2]CUDA"
        } else if backend_string.starts_with("rocm") {
            "[2]ROCm"
        } else if backend_string.starts_with("metal") {
            "[2]Metal"
        } else if backend_string.starts_with("ndarray") {
            "[4]ndarray"
        } else if backend_string.starts_with("libtorch") {
            "[6]LibTorch"
        } else if backend_string.starts_with("wgpu") {
            "[1]WebGPU"
        } else if backend_string.starts_with("vulkan") {
            "[3]Vulkan"
        } else {
            panic!("add support for backend: {backend_string}");
        };
        backends
            .entry(key.to_string())
            .or_default()
            .push(backend_string);
    }

    // display the supported backends in a nice little table
    let mut table = Table::new();
    let header_cells: Vec<_> = backends
        .keys()
        .map(|k| {
            Cell::new(k.get(3..).unwrap_or(""))
                .add_attribute(comfy_table::Attribute::Bold)
                .set_alignment(comfy_table::CellAlignment::Center)
        })
        .collect();
    table
        .load_preset(comfy_table::presets::UTF8_FULL)
        .apply_modifier(comfy_table::modifiers::UTF8_ROUND_CORNERS)
        .set_content_arrangement(comfy_table::ContentArrangement::Dynamic)
        .set_header(header_cells);
    table.add_row(
        backends
            .values()
            .map(|v| Cell::new(v.join("\n")).set_alignment(comfy_table::CellAlignment::Left))
            .collect::<Vec<_>>(),
    );
    println!("{table}");
    Ok(None)
}