bottom 0.12.3

A customizable cross-platform graphical process/system monitor for the terminal. Supports Linux, macOS, and Windows.
Documentation 
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use anyhow::anyhow;

/// An error to do with data collection.
#[derive(Debug)]
pub enum CollectionError {
    /// A general error to propagate back up. A wrapper around [`anyhow::Error`].
    General(anyhow::Error),

    /// The collection is unsupported.
    #[allow(
        dead_code,
        reason = "this is not used if everything is supported for the platform"
    )]
    Unsupported,
}

impl std::fmt::Display for CollectionError {
    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
        match self {
            CollectionError::General(err) => err.fmt(f),
            CollectionError::Unsupported => {
                write!(
                    f,
                    "bottom does not support this type of data collection for this platform."
                )
            }
        }
    }
}

impl std::error::Error for CollectionError {}

/// A [`Result`] with the error type being a [`DataCollectionError`].
pub(crate) type CollectionResult<T> = Result<T, CollectionError>;

impl From<std::io::Error> for CollectionError {
    fn from(err: std::io::Error) -> Self {
        Self::General(err.into())
    }
}

impl From<&'static str> for CollectionError {
    fn from(msg: &'static str) -> Self {
        Self::General(anyhow!(msg))
    }
}