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use std::collections::BTreeMap;
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use std::path::PathBuf;
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use std::time::Duration;
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use super::path_with_basename::WithBasename;
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use crate::dirstate::parsers::parse_dirstate_entries;
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use crate::matchers::Matcher;
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use crate::revlog::node::NULL_NODE;
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use crate::utils::hg_path::{HgPath, HgPathBuf};
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use crate::CopyMapIter;
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use crate::DirstateEntry;
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use crate::DirstateError;
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use crate::DirstateMapError;
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use crate::DirstateParents;
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use crate::DirstateStatus;
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use crate::EntryState;
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use crate::FastHashMap;
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use crate::HgPathCow;
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use crate::PatternFileWarning;
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use crate::StateMapIter;
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use crate::StatusError;
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use crate::StatusOptions;
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pub struct DirstateMap {
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parents: Option<DirstateParents>,
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dirty_parents: bool,
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root: ChildNodes,
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}
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/// Using a plain `HgPathBuf` of the full path from the repository root as a
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/// map key would also work: all paths in a given map have the same parent
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/// path, so comparing full paths gives the same result as comparing base
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/// names. However `BTreeMap` would waste time always re-comparing the same
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/// string prefix.
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type ChildNodes = BTreeMap<WithBasename<HgPathBuf>, Node>;
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#[derive(Default)]
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struct Node {
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entry: Option<DirstateEntry>,
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copy_source: Option<HgPathBuf>,
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children: ChildNodes,
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}
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impl DirstateMap {
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pub fn new() -> Self {
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Self {
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parents: None,
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dirty_parents: false,
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root: ChildNodes::new(),
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}
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}
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fn get_or_insert_node(&mut self, path: &HgPath) -> &mut Node {
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let mut child_nodes = &mut self.root;
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let mut inclusive_ancestor_paths =
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WithBasename::inclusive_ancestors_of(path);
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let mut ancestor_path = inclusive_ancestor_paths
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.next()
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.expect("expected at least one inclusive ancestor");
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loop {
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// TODO: can we avoid double lookup in all cases without allocating
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// an owned key in cases where the map already contains that key?
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let child_node =
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if child_nodes.contains_key(ancestor_path.base_name()) {
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child_nodes.get_mut(ancestor_path.base_name()).unwrap()
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} else {
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// This is always a vacant entry, using `.entry()` lets us
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// return a `&mut Node` of the newly-inserted node without
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// yet another lookup. `BTreeMap::insert` doesn’t do this.
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child_nodes.entry(ancestor_path.to_owned()).or_default()
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};
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if let Some(next) = inclusive_ancestor_paths.next() {
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ancestor_path = next;
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child_nodes = &mut child_node.children;
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} else {
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return child_node;
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}
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}
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}
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}
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impl super::dispatch::DirstateMapMethods for DirstateMap {
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fn clear(&mut self) {
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self.set_parents(&DirstateParents {
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p1: NULL_NODE,
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p2: NULL_NODE,
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});
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self.root.clear()
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}
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fn add_file(
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&mut self,
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_filename: &HgPath,
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_old_state: EntryState,
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_entry: DirstateEntry,
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) -> Result<(), DirstateMapError> {
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todo!()
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}
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fn remove_file(
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&mut self,
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_filename: &HgPath,
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_old_state: EntryState,
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_size: i32,
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) -> Result<(), DirstateMapError> {
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todo!()
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}
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fn drop_file(
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&mut self,
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_filename: &HgPath,
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_old_state: EntryState,
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) -> Result<bool, DirstateMapError> {
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todo!()
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}
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fn clear_ambiguous_times(
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&mut self,
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_filenames: Vec<HgPathBuf>,
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_now: i32,
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) {
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todo!()
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}
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fn non_normal_entries_contains(&mut self, _key: &HgPath) -> bool {
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todo!()
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}
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fn non_normal_entries_remove(&mut self, _key: &HgPath) -> bool {
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todo!()
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}
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fn non_normal_or_other_parent_paths(
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&mut self,
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) -> Box<dyn Iterator<Item = &HgPathBuf> + '_> {
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todo!()
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}
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fn set_non_normal_other_parent_entries(&mut self, _force: bool) {
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todo!()
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}
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fn iter_non_normal_paths(
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&mut self,
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) -> Box<dyn Iterator<Item = &HgPathBuf> + Send + '_> {
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todo!()
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}
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fn iter_non_normal_paths_panic(
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&self,
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) -> Box<dyn Iterator<Item = &HgPathBuf> + Send + '_> {
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todo!()
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}
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fn iter_other_parent_paths(
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&mut self,
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) -> Box<dyn Iterator<Item = &HgPathBuf> + Send + '_> {
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todo!()
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}
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fn has_tracked_dir(
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&mut self,
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_directory: &HgPath,
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) -> Result<bool, DirstateMapError> {
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todo!()
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}
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fn has_dir(
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&mut self,
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_directory: &HgPath,
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) -> Result<bool, DirstateMapError> {
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todo!()
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}
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fn parents(
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&mut self,
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_file_contents: &[u8],
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) -> Result<&DirstateParents, DirstateError> {
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todo!()
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}
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fn set_parents(&mut self, parents: &DirstateParents) {
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self.parents = Some(parents.clone());
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self.dirty_parents = true;
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}
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fn read<'a>(
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&mut self,
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file_contents: &'a [u8],
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) -> Result<Option<&'a DirstateParents>, DirstateError> {
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if file_contents.is_empty() {
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return Ok(None);
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}
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let parents = parse_dirstate_entries(
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file_contents,
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|path, entry, copy_source| {
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let node = self.get_or_insert_node(path);
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node.entry = Some(*entry);
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node.copy_source = copy_source.map(HgPath::to_owned);
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},
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)?;
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if !self.dirty_parents {
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self.set_parents(parents);
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}
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Ok(Some(parents))
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}
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fn pack(
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&mut self,
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_parents: DirstateParents,
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_now: Duration,
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) -> Result<Vec<u8>, DirstateError> {
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todo!()
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}
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fn build_file_fold_map(&mut self) -> &FastHashMap<HgPathBuf, HgPathBuf> {
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todo!()
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}
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fn set_all_dirs(&mut self) -> Result<(), DirstateMapError> {
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todo!()
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}
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fn set_dirs(&mut self) -> Result<(), DirstateMapError> {
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todo!()
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}
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fn status<'a>(
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&'a self,
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_matcher: &'a (dyn Matcher + Sync),
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_root_dir: PathBuf,
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_ignore_files: Vec<PathBuf>,
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_options: StatusOptions,
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) -> Result<
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(
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(Vec<HgPathCow<'a>>, DirstateStatus<'a>),
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Vec<PatternFileWarning>,
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),
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StatusError,
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> {
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todo!()
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}
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fn copy_map_len(&self) -> usize {
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todo!()
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}
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fn copy_map_iter(&self) -> CopyMapIter<'_> {
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todo!()
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}
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fn copy_map_contains_key(&self, _key: &HgPath) -> bool {
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todo!()
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}
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fn copy_map_get(&self, _key: &HgPath) -> Option<&HgPathBuf> {
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todo!()
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}
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fn copy_map_remove(&mut self, _key: &HgPath) -> Option<HgPathBuf> {
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todo!()
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}
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fn copy_map_insert(
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&mut self,
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_key: HgPathBuf,
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_value: HgPathBuf,
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) -> Option<HgPathBuf> {
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todo!()
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}
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fn len(&self) -> usize {
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todo!()
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}
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fn contains_key(&self, _key: &HgPath) -> bool {
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todo!()
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}
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fn get(&self, _key: &HgPath) -> Option<&DirstateEntry> {
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todo!()
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}
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fn iter(&self) -> StateMapIter<'_> {
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todo!()
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}
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}
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