cargo_web/
error.rs

1use std::error;
2use std::fmt;
3use std::io;
4use std::path::PathBuf;
5
6use cargo_shim;
7
8#[derive(Debug)]
9pub enum Error {
10    ConfigurationError( String ),
11    EnvironmentError( String ),
12    RuntimeError( String, Box< error::Error > ),
13    BuildError,
14    NoDefaultPackage,
15    EmscriptenNotAvailable,
16    CargoShimError( cargo_shim::Error ),
17    CannotLoadFile( PathBuf, io::Error ),
18    CannotRemoveDirectory( PathBuf, io::Error ),
19    CannotRemoveFile( PathBuf, io::Error ),
20    CannotCreateFile( PathBuf, io::Error ),
21    CannotWriteToFile( PathBuf, io::Error ),
22    CannotCopyFile( PathBuf, PathBuf, io::Error ),
23    Other( Box< error::Error > )
24}
25
26impl error::Error for Error {
27    fn description( &self ) -> &str {
28        match *self {
29            Error::ConfigurationError( ref message ) => &message,
30            Error::EnvironmentError( ref message ) => &message,
31            Error::RuntimeError( ref message, _ ) => &message,
32            Error::BuildError => "build failed",
33            Error::NoDefaultPackage => "no default package; you can specify a crate to use with the `-p` argument",
34            Error::EmscriptenNotAvailable => "prepackaged Emscripten is not available for this platform",
35            Error::CargoShimError( ref error ) => error.description(),
36            Error::CannotLoadFile( .. ) => "cannot load file",
37            Error::CannotRemoveDirectory( .. ) => "cannot remove directory",
38            Error::CannotRemoveFile( .. ) => "cannot remove file",
39            Error::CannotCreateFile( .. ) => "cannot create file",
40            Error::CannotWriteToFile( .. ) => "cannot write to file",
41            Error::CannotCopyFile( .. ) => "cannot copy file",
42            Error::Other( ref error ) => error.description()
43        }
44    }
45}
46
47impl From< cargo_shim::Error > for Error {
48    fn from( err: cargo_shim::Error ) -> Self {
49        Error::CargoShimError( err )
50    }
51}
52
53impl From< Box< error::Error > > for Error {
54    fn from( err: Box< error::Error > ) -> Self {
55        Error::Other( err )
56    }
57}
58
59impl From< String > for Error {
60    fn from( err: String ) -> Self {
61        Error::Other( err.into() )
62    }
63}
64
65impl< 'a > From< &'a str > for Error {
66    fn from( err: &'a str ) -> Self {
67        Error::Other( err.into() )
68    }
69}
70
71impl fmt::Display for Error {
72    fn fmt( &self, formatter: &mut fmt::Formatter ) -> fmt::Result {
73        use std::error::Error as StdError;
74        match self {
75            &Error::RuntimeError( _, ref inner ) => write!( formatter, "{}: {}", self.description(), inner ),
76            &Error::CargoShimError( cargo_shim::Error::CargoFailed( ref message ) ) => write!( formatter, "{}", message ),
77            &Error::CargoShimError( ref inner ) => write!( formatter, "{}", inner ),
78            &Error::CannotLoadFile( ref path, ref inner ) => write!( formatter, "cannot load file {:?}: {}", path, inner ),
79            &Error::CannotRemoveDirectory( ref path, ref inner ) => write!( formatter, "cannot remove directory {:?}: {}", path, inner ),
80            &Error::CannotRemoveFile( ref path, ref inner ) => write!( formatter, "cannot remove file {:?}: {}", path, inner ),
81            &Error::CannotCreateFile( ref path, ref inner ) => write!( formatter, "cannot create file {:?}: {}", path, inner ),
82            &Error::CannotWriteToFile( ref path, ref inner ) => write!( formatter, "cannot write to file {:?}: {}", path, inner ),
83            &Error::CannotCopyFile( ref src_path, ref dst_path, ref inner ) => write!( formatter, "cannot copy file from {:?} to {:?}: {}", src_path, dst_path, inner ),
84            &Error::Other( ref inner ) => write!( formatter, "{}", inner ),
85            _ => write!( formatter, "{}", self.description() )
86        }
87    }
88}
cargo_web/error.rs

cargo_web/
error.rs
