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
// This file is part of yash, an extended POSIX shell.
// Copyright (C) 2023 WATANABE Yuki
//
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program. If not, see <https://www.gnu.org/licenses/>.
//! Unset built-in
//!
//! This module implements the [`unset` built-in], which unsets shell variables
//! or functions.
//!
//! [`unset` built-in]: https://magicant.github.io/yash-rs/builtins/unset.html
use crate::Result;
use crate::common::report::{merge_reports, report_error, report_failure};
use yash_env::Env;
use yash_env::semantics::Field;
/// Selection of what to unset
#[derive(Debug, Clone, Copy, Default, Eq, Hash, PartialEq)]
#[non_exhaustive]
pub enum Mode {
/// Unsets shell variables.
#[default]
Variables,
/// Unsets shell functions.
Functions,
}
/// Parsed command line arguments
#[derive(Debug, Clone, Default, Eq, PartialEq)]
#[non_exhaustive]
pub struct Command {
/// What to unset
pub mode: Mode,
/// Names of shell variables or functions to unset
pub names: Vec<Field>,
}
pub mod semantics;
pub mod syntax;
/// Entry point of the `unset` built-in
pub async fn main(env: &mut Env, args: Vec<Field>) -> Result {
let command = match syntax::parse(env, args) {
Ok(command) => command,
Err(e) => return report_error(env, &e).await,
};
match command.mode {
Mode::Variables => {
let errors = semantics::unset_variables(env, &command.names);
match merge_reports(&errors) {
None => Result::default(),
Some(report) => report_failure(env, report).await,
}
}
Mode::Functions => {
let errors = semantics::unset_functions(env, &command.names);
match merge_reports(&errors) {
None => Result::default(),
Some(report) => report_failure(env, report).await,
}
}
}
}