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|
use std::path::Path;
use bstr::BStr;
use gix_attributes::StateRef;
use smallvec::SmallVec;
use crate::{
driver, eol,
eol::AttributesDigest,
pipeline::{convert::configuration, Context, CrlfRoundTripCheck},
Driver,
};
/// A utility to do buffer-swapping with.
#[derive(Default, Clone)]
pub(crate) struct Buffers {
pub src: Vec<u8>,
pub dest: Vec<u8>,
}
/// A utility to do buffer-swapping with.
pub(crate) struct BuffersWithSource<'src, 'bufs> {
pub ro_src: Option<&'src [u8]>,
pub src: &'bufs mut Vec<u8>,
pub dest: &'bufs mut Vec<u8>,
}
impl Buffers {
pub fn with_src<'a, 'src>(&'a mut self, src: &'src [u8]) -> BuffersWithSource<'src, 'a> {
self.clear();
BuffersWithSource {
ro_src: Some(src),
src: &mut self.src,
dest: &mut self.dest,
}
}
pub fn clear(&mut self) {
self.src.clear();
self.dest.clear();
}
pub fn swap(&mut self) {
std::mem::swap(&mut self.src, &mut self.dest);
}
}
impl BuffersWithSource<'_, '_> {
/// Must be called after every change (i.e. when it's known that `dest` was written.
pub fn swap(&mut self) {
self.ro_src.take();
std::mem::swap(&mut self.src, &mut self.dest);
self.dest.clear();
}
pub fn src_and_dest(&mut self) -> (&[u8], &mut Vec<u8>) {
match self.ro_src {
Some(src) => (src, &mut self.dest),
None => (self.src, &mut self.dest),
}
}
}
pub(crate) struct Configuration<'a> {
pub(crate) driver: Option<&'a Driver>,
/// What attributes say about CRLF handling.
pub(crate) _attr_digest: Option<eol::AttributesDigest>,
/// The final digest that includes configuration values
pub(crate) digest: eol::AttributesDigest,
pub(crate) encoding: Option<&'static encoding_rs::Encoding>,
/// Whether or not to apply the `ident` filter
pub(crate) apply_ident_filter: bool,
}
impl<'driver> Configuration<'driver> {
pub(crate) fn at_path(
rela_path: &BStr,
drivers: &'driver [Driver],
attrs: &mut gix_attributes::search::Outcome,
attributes: &mut dyn FnMut(&BStr, &mut gix_attributes::search::Outcome),
config: eol::Configuration,
) -> Result<Configuration<'driver>, configuration::Error> {
fn extract_driver<'a>(drivers: &'a [Driver], attr: &gix_attributes::search::Match<'_>) -> Option<&'a Driver> {
if let StateRef::Value(name) = attr.assignment.state {
drivers.iter().find(|d| d.name == name.as_bstr())
} else {
None
}
}
fn extract_encoding(
attr: &gix_attributes::search::Match<'_>,
) -> Result<Option<&'static encoding_rs::Encoding>, configuration::Error> {
match attr.assignment.state {
StateRef::Set | StateRef::Unset => Err(configuration::Error::InvalidEncoding),
StateRef::Value(name) => encoding_rs::Encoding::for_label(name.as_bstr())
.ok_or(configuration::Error::UnknownEncoding {
name: name.as_bstr().to_owned(),
})
.map(|encoding| {
// The working-tree-encoding is the encoding we have to expect in the working tree.
// If the specified one is the default encoding, there is nothing to do.
if encoding == encoding_rs::UTF_8 {
None
} else {
Some(encoding)
}
}),
StateRef::Unspecified => Ok(None),
}
}
/// This is based on `git_path_check_crlf` in the git codebase.
fn extract_crlf(attr: &gix_attributes::search::Match<'_>) -> Option<eol::AttributesDigest> {
match attr.assignment.state {
StateRef::Unspecified => None,
StateRef::Set => Some(eol::AttributesDigest::Text),
StateRef::Unset => Some(eol::AttributesDigest::Binary),
StateRef::Value(v) => {
if v.as_bstr() == "input" {
Some(eol::AttributesDigest::TextInput)
} else if v.as_bstr() == "auto" {
Some(eol::AttributesDigest::TextAuto)
} else {
None
}
}
}
}
fn extract_eol(attr: &gix_attributes::search::Match<'_>) -> Option<eol::Mode> {
match attr.assignment.state {
StateRef::Unspecified | StateRef::Unset | StateRef::Set => None,
StateRef::Value(v) => {
if v.as_bstr() == "lf" {
Some(eol::Mode::Lf)
} else if v.as_bstr() == "crlf" {
Some(eol::Mode::CrLf)
} else {
None
}
}
}
}
attributes(rela_path, attrs);
let attrs: SmallVec<[_; crate::pipeline::ATTRS.len()]> = attrs.iter_selected().collect();
let apply_ident_filter = attrs[1].assignment.state.is_set();
let driver = extract_driver(drivers, &attrs[2]);
let encoding = extract_encoding(&attrs[5])?;
let mut digest = extract_crlf(&attrs[4]);
if digest.is_none() {
digest = extract_crlf(&attrs[0]);
}
if digest != Some(AttributesDigest::Binary) {
let eol = extract_eol(&attrs[3]);
digest = match digest {
Some(AttributesDigest::TextAuto) if eol == Some(eol::Mode::Lf) => Some(AttributesDigest::TextAutoInput),
Some(AttributesDigest::TextAuto) if eol == Some(eol::Mode::CrLf) => {
Some(AttributesDigest::TextAutoCrlf)
}
_ => match eol {
Some(eol::Mode::CrLf) => Some(AttributesDigest::TextCrlf),
Some(eol::Mode::Lf) => Some(AttributesDigest::TextInput),
_ => digest,
},
};
}
let attr_digest = digest;
digest = match digest {
None => Some(config.auto_crlf.into()),
Some(AttributesDigest::Text) => Some(config.to_eol().into()),
_ => digest,
};
Ok(Configuration {
driver,
_attr_digest: attr_digest,
digest: digest.expect("always set by now"),
encoding,
apply_ident_filter,
})
}
}
impl Context {
pub(crate) fn with_path<'a>(&self, rela_path: &'a BStr) -> driver::apply::Context<'a, '_> {
driver::apply::Context {
rela_path,
ref_name: self.ref_name.as_ref().map(AsRef::as_ref),
treeish: self.treeish,
blob: self.blob,
}
}
}
impl CrlfRoundTripCheck {
pub(crate) fn to_eol_roundtrip_check(self, rela_path: &Path) -> Option<eol::convert_to_git::RoundTripCheck<'_>> {
match self {
CrlfRoundTripCheck::Fail => Some(eol::convert_to_git::RoundTripCheck::Fail { rela_path }),
CrlfRoundTripCheck::Warn => Some(eol::convert_to_git::RoundTripCheck::Warn { rela_path }),
CrlfRoundTripCheck::Skip => None,
}
}
}
|
