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// Copyright 2018 Guillaume Pinot (@TeXitoi) <texitoi@texitoi.eu>,
// Kevin Knapp (@kbknapp) <kbknapp@gmail.com>, and
// Ana Hobden (@hoverbear) <operator@hoverbear.org>
//
// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
// option. This file may not be copied, modified, or distributed
// except according to those terms.
//
// This work was derived from Structopt (https://github.com/TeXitoi/structopt)
// commit#ea76fa1b1b273e65e3b0b1046643715b49bec51f which is licensed under the
// MIT/Apache 2.0 license.
use proc_macro2::{Span, TokenStream};
use quote::quote;
use syn::{Generics, Ident};
use crate::item::Item;
pub fn gen_for_struct(
item: &Item,
item_name: &Ident,
generics: &Generics,
) -> Result<TokenStream, syn::Error> {
let (impl_generics, ty_generics, where_clause) = generics.split_for_impl();
let name = item.cased_name();
let app_var = Ident::new("__clap_app", Span::call_site());
let tokens = quote! {
#[allow(dead_code, unreachable_code, unused_variables, unused_braces)]
#[allow(
clippy::style,
clippy::complexity,
clippy::pedantic,
clippy::restriction,
clippy::perf,
clippy::deprecated,
clippy::nursery,
clippy::cargo,
clippy::suspicious_else_formatting,
clippy::almost_swapped,
)]
impl #impl_generics clap::CommandFactory for #item_name #ty_generics #where_clause {
fn command<'b>() -> clap::Command {
let #app_var = clap::Command::new(#name);
<Self as clap::Args>::augment_args(#app_var)
}
fn command_for_update<'b>() -> clap::Command {
let #app_var = clap::Command::new(#name);
<Self as clap::Args>::augment_args_for_update(#app_var)
}
}
};
Ok(tokens)
}
pub fn gen_for_enum(
item: &Item,
item_name: &Ident,
generics: &Generics,
) -> Result<TokenStream, syn::Error> {
let (impl_generics, ty_generics, where_clause) = generics.split_for_impl();
let name = item.cased_name();
let app_var = Ident::new("__clap_app", Span::call_site());
Ok(quote! {
#[allow(dead_code, unreachable_code, unused_variables, unused_braces)]
#[allow(
clippy::style,
clippy::complexity,
clippy::pedantic,
clippy::restriction,
clippy::perf,
clippy::deprecated,
clippy::nursery,
clippy::cargo,
clippy::suspicious_else_formatting,
clippy::almost_swapped,
)]
impl #impl_generics clap::CommandFactory for #item_name #ty_generics #where_clause {
fn command<'b>() -> clap::Command {
let #app_var = clap::Command::new(#name)
.subcommand_required(true)
.arg_required_else_help(true);
<Self as clap::Subcommand>::augment_subcommands(#app_var)
}
fn command_for_update<'b>() -> clap::Command {
let #app_var = clap::Command::new(#name);
<Self as clap::Subcommand>::augment_subcommands_for_update(#app_var)
.subcommand_required(false)
.arg_required_else_help(false)
}
}
})
}
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