clog-cli 0.9.3

A conventional changelog for the rest of us
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

use std::convert::From;
use std::error::Error;
use std::fmt::{Display, Formatter};
use std::fmt::Result as FmtResult;

use clog::error::Error as ClogErr;

use fmt::Format;

#[derive(Debug)]
#[allow(dead_code)]
pub enum CliError {
    Semver(Box<Error>, String),
    Generic(String),
    Unknown
}

// Copies clog::error::Error;
impl CliError {
    /// Return whether this was a fatal error or not.
    pub fn is_fatal(&self) -> bool {
        // For now all errors are fatal
        true
    }

    /// Print this error and immediately exit the program.
    ///
    /// If the error is non-fatal then the error is printed to stdout and the
    /// exit status will be `0`. Otherwise, when the error is fatal, the error
    /// is printed to stderr and the exit status will be `1`.
    pub fn exit(&self) -> ! {
        if self.is_fatal() {
            wlnerr!("{}", self);
            ::std::process::exit(1)
        } else {
            println!("{}", self);
            ::std::process::exit(0)
        }
    }
}

impl Display for CliError {
    fn fmt(&self, f: &mut Formatter) -> FmtResult {
        write!(f, "{} {}", Format::Error("error:"), self.description())
    }
}

impl Error for CliError {
    fn description<'a>(&'a self) -> &'a str {
        match *self {
            CliError::Semver(_, ref s) => &*s,
            CliError::Generic(ref d) => &*d,
            CliError::Unknown =>
                "An unknown fatal error has occurred, please consider filing a bug-report!",
        }
    }

    fn cause(&self) -> Option<&Error> {
        match *self {
            CliError::Semver(ref e, _) => Some(&**e),
            CliError::Generic(..) => None,
            CliError::Unknown => None,
        }
    }
}

impl From<ClogErr> for CliError {
    fn from(ce: ClogErr) -> Self {
        CliError::Generic(ce.description().to_owned())
    }
}