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
137
138
139
140
141
142
143
144

/*
   Copyright The containerd Authors.

   Licensed under the Apache License, Version 2.0 (the "License");
   you may not use this file except in compliance with the License.
   You may obtain a copy of the License at

       http://www.apache.org/licenses/LICENSE-2.0

   Unless required by applicable law or agreed to in writing, software
   distributed under the License is distributed on an "AS IS" BASIS,
   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   See the License for the specific language governing permissions and
   limitations under the License.
*/

use thiserror::Error;

use crate::{
    monitor::ExitEvent,
    protos::{protobuf, ttrpc},
};

pub type Result<T> = std::result::Result<T, Error>;

#[derive(Debug, Error)]
pub enum Error {
    /// Invalid command line arguments.
    #[error("Failed to parse command line: {0}")]
    InvalidArgument(String),

    /// TTRPC specific error.
    #[error("TTRPC error: {0}")]
    Ttrpc(#[from] ttrpc::Error),

    #[error("Protobuf error: {0}")]
    Protobuf(#[from] protobuf::Error),

    #[error("{context} error: {err}")]
    IoError {
        context: String,
        #[source]
        err: std::io::Error,
    },

    #[error("Env error: {0}")]
    Env(#[from] std::env::VarError),

    #[error("Failed to setup logger: {0}")]
    Setup(#[from] log::SetLoggerError),

    /// Unable to pass fd to child process (we rely on `command_fds` crate for this).
    #[cfg(unix)]
    #[error("Failed to pass socket fd to child: {0}")]
    FdMap(#[from] command_fds::FdMappingCollision),

    #[cfg(unix)]
    #[error("Nix error: {0}")]
    Nix(#[from] nix::Error),

    #[error("Failed to get envelope timestamp: {0}")]
    Timestamp(#[from] std::time::SystemTimeError),

    #[error("Not Found: {0}")]
    NotFoundError(String),

    #[error("Failed pre condition: {0}")]
    FailedPreconditionError(String),

    #[cfg(unix)]
    #[error("{context} error: {err}")]
    MountError {
        context: String,
        #[source]
        err: nix::Error,
    },

    #[error("Failed to convert json object: {0}")]
    JSON(#[from] serde_json::Error),

    #[error("Failed to parse integer: {0}")]
    ParseInt(#[from] std::num::ParseIntError),

    #[error("Failed to send exit event: {0}")]
    Send(#[from] std::sync::mpsc::SendError<ExitEvent>),

    #[error("Other: {0}")]
    Other(String),

    #[error("Unimplemented method: {0}")]
    Unimplemented(String),
}

impl From<Error> for ttrpc::Error {
    fn from(e: Error) -> Self {
        match e {
            Error::InvalidArgument(ref s) => {
                ttrpc::Error::RpcStatus(ttrpc::get_status(ttrpc::Code::INVALID_ARGUMENT, s))
            }
            Error::NotFoundError(ref s) => {
                ttrpc::Error::RpcStatus(ttrpc::get_status(ttrpc::Code::NOT_FOUND, s))
            }
            Error::FailedPreconditionError(ref s) => {
                ttrpc::Error::RpcStatus(ttrpc::get_status(ttrpc::Code::FAILED_PRECONDITION, s))
            }
            Error::Ttrpc(e) => e,
            _ => ttrpc::Error::Others(e.to_string()),
        }
    }
}

#[macro_export]
macro_rules! io_error {
    ($e:ident, $($args:tt)+) => {
        |$e| Error::IoError {
            context: format_args!($($args)+).to_string(),
            err: $e,
        }
    };
}

#[macro_export]
macro_rules! mount_error {
    ($e:ident, $($args:tt)+) => {
        |$e| Error::MountError {
            context: format_args!($($args)+).to_string(),
            err: $e,
        }
    };
}

#[macro_export]
macro_rules! other {
    ($($args:tt)*) => {
        Error::Other(format_args!($($args)*).to_string())
    };
}

#[macro_export]
macro_rules! other_error {
    ($e:ident, $s:expr) => {
        |$e| Error::Other($s.to_string() + &": ".to_string() + &$e.to_string())
    };
}