himalaya 1.2.0

CLI to manage emails
Documentation 
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use clap::Parser;

/// The envelope id argument parser.
#[derive(Debug, Parser)]
pub struct HeaderRawArgs {
    /// Prefill the template with custom headers.
    ///
    /// A raw header should follow the pattern KEY:VAL.
    #[arg(long = "header", short = 'H', required = false)]
    #[arg(name = "header-raw", value_name = "KEY:VAL", value_parser = raw_header_parser)]
    pub raw: Vec<(String, String)>,
}

pub fn raw_header_parser(raw_header: &str) -> Result<(String, String), String> {
    if let Some((key, val)) = raw_header.split_once(':') {
        Ok((key.trim().to_owned(), val.trim().to_owned()))
    } else {
        Err(format!("cannot parse raw header {raw_header:?}"))
    }
}