nuts_tool_api/plugin/
cli.rs

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
131
132
133
134
135
136
// MIT License
//
// Copyright (c) 2024 Robin Doer
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to
// deal in the Software without restriction, including without limitation the
// rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
// sell copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
// IN THE SOFTWARE.

//! Command line interface for the plugin.

use clap::{crate_version, ArgAction, Args, Parser, Subcommand, ValueEnum};
use std::convert::{TryFrom, TryInto};
use std::ops::Deref;
use std::str::FromStr;

#[derive(Clone, Debug)]
pub struct SizeArg<T>(T);

impl<T: TryFrom<u64>> FromStr for SizeArg<T> {
    type Err = String;

    fn from_str(s: &str) -> Result<Self, String> {
        let (num_str, factor) = if let Some(s) = s.strip_suffix('k') {
            (s, 1024)
        } else if let Some(s) = s.strip_suffix('m') {
            (s, 1024 * 1024)
        } else if let Some(s) = s.strip_suffix('g') {
            (s, 1024 * 1024 * 1024)
        } else {
            (s, 1)
        };

        if let Ok(n) = num_str.parse::<u64>() {
            if let Ok(n) = TryInto::<T>::try_into(n * factor) {
                return Ok(Self(n));
            }
        }

        Err("must be a number or a number suffixed with 'k', 'm', 'g'".to_string())
    }
}

impl<T> Deref for SizeArg<T> {
    type Target = T;

    fn deref(&self) -> &T {
        &self.0
    }
}

#[derive(Clone, Copy, Debug, ValueEnum)]
pub enum Format {
    Text,
    Bson,
}

#[derive(Args, Debug)]
pub struct InfoArgs {
    #[clap(long, default_value = "text")]
    pub format: Format,
}

#[derive(Args, Debug)]
pub struct OpenArgs {
    /// Name of the container
    pub name: String,
}

#[derive(Args, Debug)]
pub struct CreateArgs<CX: Args> {
    /// Name of the container
    pub name: String,

    #[clap(flatten)]
    pub extra: CX,
}

#[derive(Debug, Subcommand)]
pub enum PluginCommand<CX: Args> {
    /// Prints information about the plugin
    Info(InfoArgs),

    /// Opens a backend instance
    Open(OpenArgs),

    /// Creates a new backend instance
    Create(CreateArgs<CX>),
}

impl<CX: Args> PluginCommand<CX> {
    pub fn as_info(&self) -> Option<&InfoArgs> {
        match self {
            Self::Info(args) => Some(args),
            _ => None,
        }
    }

    pub fn as_open(&self) -> Option<&OpenArgs> {
        match self {
            Self::Open(args) => Some(args),
            _ => None,
        }
    }

    pub fn as_create(&self) -> Option<&CreateArgs<CX>> {
        match self {
            Self::Create(args) => Some(args),
            _ => None,
        }
    }
}

#[derive(Debug, Parser)]
#[clap(version = crate_version!())]
pub struct PluginCli<CX: Args> {
    #[clap(subcommand)]
    pub command: PluginCommand<CX>,

    /// Enable verbose output. Can be called multiple times
    #[clap(short, long, action = ArgAction::Count, global = true)]
    pub verbose: u8,
}