1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
#![deny(
missing_docs,
rust_2018_idioms,
unused,
unused_import_braces,
unused_lifetimes,
unused_qualifications,
warnings,
)]
use {
proc_macro::TokenStream,
proc_macro2::Span,
quote::quote,
syn::{
Ident,
ItemFn,
parse_macro_input,
},
};
#[proc_macro_attribute]
pub fn command(_: TokenStream, item: TokenStream) -> TokenStream {
let command_fn = parse_macro_input!(item as ItemFn);
let command_name = &command_fn.sig.ident;
let command_name_str = command_name.to_string();
let wrapper_name = Ident::new(&format!("{}_wrapper", command_name), Span::call_site());
TokenStream::from(quote! {
fn #wrapper_name(program: ::std::ffi::OsString, args: Vec<::std::ffi::OsString>) {
#command_fn
match #command_name(args.into_iter()) {
Ok(subcommand) => {},
Err(e) => {
bitbar_notify(format!("{}: {}", #command_name_str, e));
::std::process::exit(1);
}
}
}
inventory::submit! {
Subcommand {
name: #command_name_str,
func: #wrapper_name,
}
}
})
}
#[proc_macro_attribute]
pub fn main(_: TokenStream, item: TokenStream) -> TokenStream {
let main_fn = parse_macro_input!(item as ItemFn);
let asyncness = &main_fn.sig.asyncness;
let main_prefix = if let Some(async_keyword) = asyncness {
quote!(#[tokio::main] #async_keyword)
} else {
quote!()
};
let awaitness = asyncness.as_ref().map(|_| quote!(.await));
let ret = main_fn.sig.output;
let body = main_fn.block;
TokenStream::from(quote! {
use ::bitbar::{
inventory,
tokio,
};
struct Subcommand {
name: &'static str,
func: fn(::std::ffi::OsString, Vec<::std::ffi::OsString>),
}
inventory::collect!(Subcommand);
#asyncness fn main_inner() #ret #body
fn bitbar_notify(body: impl ::std::fmt::Display) {
let _ = ::bitbar::notify_rust::Notification::default()
.summary(&env!("CARGO_PKG_NAME"))
.sound_name("Funky")
.body(&body.to_string())
.show();
}
#main_prefix fn main() {
let mut args = env::args_os();
let program = args.next().expect("missing program name");
if let Some(subcommand) = args.next() {
let subcommand = match subcommand.into_string() {
Ok(subcommand) => subcommand,
Err(_) => {
bitbar_notify("subcommand is not valid UTF-8");
::std::process::exit(1);
}
};
if let Some(command) = inventory::iter::<Subcommand>.into_iter().find(|command| command.name == subcommand) {
(command.func)(program, args.collect());
} else {
bitbar_notify(format!("no such subcommand: {}", subcommand));
::std::process::exit(1);
}
} else {
match main_inner()#awaitness {
Ok(menu) => print!("{}", menu),
Err(e) => {
let mut menu = Menu(vec![
::bitbar::MenuItem::new("?"),
::bitbar::MenuItem::Sep,
]);
menu.extend(::bitbar::Menu::from(e));
print!("{}", menu);
}
}
}
}
})
}