which 4.0.1

A Rust equivalent of Unix command "which". Locate installed executable in cross platforms.
Documentation 
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use thiserror;

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

#[derive(thiserror::Error, Copy, Clone, Eq, PartialEq, Debug)]
pub enum Error {
    #[error("bad absolute path")]
    BadAbsolutePath,
    #[error("bad relative path")]
    BadRelativePath,
    #[error("cannot find binary path")]
    CannotFindBinaryPath,
    #[error("cannot get current directory")]
    CannotGetCurrentDir,
    #[error("cannot canonicalize path")]
    CannotCanonicalize,
}