use std::convert::TryInto; #[derive(Debug, thiserror::Error)]enum Error {    #[error(transparent)]    UrlParse(#[from] gix::url::parse::Error),    #[error(transparent)]    Configuration(#[from] gix::config::credential_helpers::Error),    #[error(transparent)]    Protocol(#[from] gix::credentials::protocol::Error),} pub fn function(repo: gix::Repository, action: gix::credentials::program::main::Action) -> anyhow::Result<()> {    use gix::credentials::program::main::Action::*;    gix::credentials::program::main(        Some(action.as_str().into()),        std::io::stdin(),        std::io::stdout(),        |action, context| -> Result<_, Error> {            let (mut cascade, _action, prompt_options) = repo.config_snapshot().credential_helpers(gix::url::parse(                context.url.as_ref().expect("framework assures URL is present").as_ref(),            )?)?;            cascade                .invoke(                    match action {                        Get => gix::credentials::helper::Action::Get(context),                        Erase => gix::credentials::helper::Action::Erase(context.to_bstring()),                        Store => gix::credentials::helper::Action::Store(context.to_bstring()),                    },                    prompt_options,                )                .map(|outcome| outcome.and_then(|outcome| (&outcome.next).try_into().ok()))                .map_err(Into::into)        },    )    .map_err(Into::into)}