llvmenv 0.1.8

Manage LLVM/Clang builds
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

use failure::Error;
use std::process;

pub type Result<T> = ::std::result::Result<T, Error>;
pub type CommandResult = ::std::result::Result<(), CommandError>;

#[derive(Debug, Fail)]
pub enum CommandError {
    #[fail(display = "Exit with error-code({}): {}", errno, cmd)]
    ErrorCode { errno: i32, cmd: String },
    #[fail(display = "Launch failed: {}", cmd)]
    LaunchFailed { cmd: String },
    #[fail(display = "Terminated by signal: {}", cmd)]
    TerminatedBySignal { cmd: String },
}

pub trait CheckRun {
    fn check_run(&mut self) -> CommandResult;
}

impl CheckRun for process::Command {
    fn check_run(&mut self) -> CommandResult {
        let cmd = format!("{:?}", self);
        let st = self.status()
            .map_err(|_| CommandError::LaunchFailed { cmd: cmd.clone() })?;
        match st.code() {
            Some(errno) => {
                if errno != 0 {
                    Err(CommandError::ErrorCode { errno, cmd })
                } else {
                    Ok(())
                }
            }
            None => Err(CommandError::TerminatedBySignal { cmd }),
        }
    }
}