topcat 0.1.0

A tool for concatenating files in topological order
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

use std::{fmt, io};
use std::error::Error;
use std::path::PathBuf;

#[derive(Debug)]
pub enum TopCatError {
    Io(io::Error),
    GraphMissing,
    NameClash(String, PathBuf, PathBuf),
    TooManyNames(PathBuf, Vec<String>),
    NoNameDefined(PathBuf),
    MissingExist(String, String),
    MissingDependency(String, String),
    InvalidDependency(String, String),
    CyclicDependency(String),
}

impl fmt::Display for TopCatError {
    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
        match self {
            Self::GraphMissing => write!(f, "Graph is None"),
            Self::NameClash(name, f1, f2) => write!(f, "Name {} found in both {} and {}", name, f1.display(), f2.display()),
            Self::TooManyNames(x, s) => write!(f, "Too many names declared in {}: {}", x.display(), s.join(", ")),
            Self::NoNameDefined(x) => write!(f, "No name defined in {}", x.display()),
            Self::MissingExist(x, s) => write!(f, "MissingExist: {} expects {} to exist but it is not found", s, x),
            Self::MissingDependency(x, s) => write!(f, "MissingDependency: {} depends on {} bit it is missing", s, x),
            Self::InvalidDependency(x, s) => write!(f, "InvalidDependency: {} is marked as prepend so it cannot depend on {} which isn't marked as prepend", s, x),
            Self::CyclicDependency(x) => write!(f, "CyclicDependency: {} has a cyclic dependency", x),
            Self::Io(err) => write!(f, "IO error: {}", err),
        }
    }
}

impl From<io::Error> for TopCatError {
    fn from(err: io::Error) -> TopCatError {
        TopCatError::Io(err)
    }
}

impl Error for TopCatError {}