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use std::convert::TryFrom;
use crate::bstr::{BStr, BString, ByteSlice};
/// The error returned by [`SnapshotMut::apply_cli_overrides()`][crate::config::SnapshotMut::append_config()].
#[derive(Debug, thiserror::Error)]
#[allow(missing_docs)]
pub enum Error {
#[error("{input:?} is not a valid configuration key. Examples are 'core.abbrev' or 'remote.origin.url'")]
InvalidKey { input: BString },
#[error("Key {key:?} could not be parsed")]
SectionKey {
key: BString,
source: gix_config::parse::section::key::Error,
},
#[error(transparent)]
SectionHeader(#[from] gix_config::parse::section::header::Error),
}
pub(crate) fn append(
config: &mut gix_config::File<'static>,
values: impl IntoIterator<Item = impl AsRef<BStr>>,
source: gix_config::Source,
mut make_comment: impl FnMut(&BStr) -> Option<BString>,
) -> Result<(), Error> {
let mut file = gix_config::File::new(gix_config::file::Metadata::from(source));
for key_value in values {
let key_value = key_value.as_ref();
let mut tokens = key_value.splitn(2, |b| *b == b'=').map(ByteSlice::trim);
let key = tokens.next().expect("always one value").as_bstr();
let value = tokens.next();
let key = gix_config::parse::key(
key.to_str()
.map_err(|_| Error::InvalidKey { input: key.into() })?
.into(),
)
.ok_or_else(|| Error::InvalidKey { input: key.into() })?;
let mut section = file.section_mut_or_create_new(key.section_name, key.subsection_name)?;
let key =
gix_config::parse::section::Key::try_from(key.value_name.to_owned()).map_err(|err| Error::SectionKey {
source: err,
key: key.value_name.into(),
})?;
let comment = make_comment(key_value);
let value = value.map(ByteSlice::as_bstr);
match comment {
Some(comment) => section.push_with_comment(key, value, &**comment),
None => section.push(key, value),
};
}
config.append(file);
Ok(())
}
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