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// dirstate_map.rs
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//
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// Copyright 2019 Raphaël Gomès <rgomes@octobus.net>
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//
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// This software may be used and distributed according to the terms of the
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// GNU General Public License version 2 or any later version.
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use crate::{
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dirstate::{parsers::PARENT_SIZE, EntryState, SIZE_FROM_OTHER_PARENT},
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pack_dirstate, parse_dirstate,
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utils::{
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files::normalize_case,
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hg_path::{HgPath, HgPathBuf},
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},
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CopyMap, DirsMultiset, DirstateEntry, DirstateError, DirstateMapError,
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DirstateParents, DirstateParseError, FastHashMap, StateMap,
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};
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use core::borrow::Borrow;
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use std::collections::HashSet;
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use std::convert::TryInto;
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use std::iter::FromIterator;
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use std::ops::Deref;
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use std::time::Duration;
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pub type FileFoldMap = FastHashMap<HgPathBuf, HgPathBuf>;
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const NULL_ID: [u8; 20] = [0; 20];
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const MTIME_UNSET: i32 = -1;
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#[derive(Default)]
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pub struct DirstateMap {
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state_map: StateMap,
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pub copy_map: CopyMap,
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file_fold_map: Option<FileFoldMap>,
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pub dirs: Option<DirsMultiset>,
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pub all_dirs: Option<DirsMultiset>,
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non_normal_set: Option<HashSet<HgPathBuf>>,
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other_parent_set: Option<HashSet<HgPathBuf>>,
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parents: Option<DirstateParents>,
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dirty_parents: bool,
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}
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/// Should only really be used in python interface code, for clarity
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impl Deref for DirstateMap {
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type Target = StateMap;
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fn deref(&self) -> &Self::Target {
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&self.state_map
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}
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}
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impl FromIterator<(HgPathBuf, DirstateEntry)> for DirstateMap {
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fn from_iter<I: IntoIterator<Item = (HgPathBuf, DirstateEntry)>>(
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iter: I,
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) -> Self {
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Self {
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state_map: iter.into_iter().collect(),
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..Self::default()
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}
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}
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}
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impl DirstateMap {
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pub fn new() -> Self {
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Self::default()
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}
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pub fn clear(&mut self) {
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self.state_map.clear();
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self.copy_map.clear();
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self.file_fold_map = None;
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self.non_normal_set = None;
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self.other_parent_set = None;
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self.set_parents(&DirstateParents {
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p1: NULL_ID,
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p2: NULL_ID,
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})
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}
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/// Add a tracked file to the dirstate
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pub 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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if old_state == EntryState::Unknown || old_state == EntryState::Removed
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{
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if let Some(ref mut dirs) = self.dirs {
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dirs.add_path(filename)?;
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}
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}
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if old_state == EntryState::Unknown {
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if let Some(ref mut all_dirs) = self.all_dirs {
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all_dirs.add_path(filename)?;
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}
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}
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self.state_map.insert(filename.to_owned(), entry.to_owned());
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if entry.state != EntryState::Normal || entry.mtime == MTIME_UNSET {
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self.get_non_normal_other_parent_entries()
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.0
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.insert(filename.to_owned());
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}
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if entry.size == SIZE_FROM_OTHER_PARENT {
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self.get_non_normal_other_parent_entries()
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.1
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.insert(filename.to_owned());
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}
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Ok(())
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}
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/// Mark a file as removed in the dirstate.
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///
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/// The `size` parameter is used to store sentinel values that indicate
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/// the file's previous state. In the future, we should refactor this
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/// to be more explicit about what that state is.
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pub 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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if old_state != EntryState::Unknown && old_state != EntryState::Removed
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{
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if let Some(ref mut dirs) = self.dirs {
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dirs.delete_path(filename)?;
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}
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}
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if old_state == EntryState::Unknown {
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if let Some(ref mut all_dirs) = self.all_dirs {
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all_dirs.add_path(filename)?;
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}
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}
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if let Some(ref mut file_fold_map) = self.file_fold_map {
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file_fold_map.remove(&normalize_case(filename));
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}
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self.state_map.insert(
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filename.to_owned(),
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DirstateEntry {
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state: EntryState::Removed,
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mode: 0,
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size,
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mtime: 0,
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},
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);
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self.get_non_normal_other_parent_entries()
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.0
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.insert(filename.to_owned());
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Ok(())
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}
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/// Remove a file from the dirstate.
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/// Returns `true` if the file was previously recorded.
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pub 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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let exists = self.state_map.remove(filename).is_some();
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if exists {
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if old_state != EntryState::Removed {
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if let Some(ref mut dirs) = self.dirs {
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dirs.delete_path(filename)?;
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}
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}
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if let Some(ref mut all_dirs) = self.all_dirs {
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all_dirs.delete_path(filename)?;
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}
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}
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if let Some(ref mut file_fold_map) = self.file_fold_map {
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file_fold_map.remove(&normalize_case(filename));
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}
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self.get_non_normal_other_parent_entries()
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.0
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.remove(filename);
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Ok(exists)
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}
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pub 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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for filename in filenames {
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let mut changed = false;
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self.state_map
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.entry(filename.to_owned())
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.and_modify(|entry| {
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if entry.state == EntryState::Normal && entry.mtime == now
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{
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changed = true;
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*entry = DirstateEntry {
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mtime: MTIME_UNSET,
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..*entry
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};
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}
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});
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if changed {
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self.get_non_normal_other_parent_entries()
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.0
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.insert(filename.to_owned());
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}
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}
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}
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pub fn non_normal_entries_remove(
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&mut self,
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key: impl AsRef<HgPath>,
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) -> bool {
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self.get_non_normal_other_parent_entries()
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.0
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.remove(key.as_ref())
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}
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pub fn non_normal_entries_union(
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&mut self,
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other: HashSet<HgPathBuf>,
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) -> Vec<HgPathBuf> {
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self.get_non_normal_other_parent_entries()
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.0
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.union(&other)
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.map(|e| e.to_owned())
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.collect()
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}
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pub fn get_non_normal_other_parent_entries(
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&mut self,
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) -> (&mut HashSet<HgPathBuf>, &mut HashSet<HgPathBuf>) {
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self.set_non_normal_other_parent_entries(false);
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(
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self.non_normal_set.as_mut().unwrap(),
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self.other_parent_set.as_mut().unwrap(),
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)
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}
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pub fn set_non_normal_other_parent_entries(&mut self, force: bool) {
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if !force
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&& self.non_normal_set.is_some()
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&& self.other_parent_set.is_some()
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{
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return;
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}
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let mut non_normal = HashSet::new();
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let mut other_parent = HashSet::new();
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for (
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filename,
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DirstateEntry {
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state, size, mtime, ..
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},
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) in self.state_map.iter()
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{
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if *state != EntryState::Normal || *mtime == MTIME_UNSET {
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non_normal.insert(filename.to_owned());
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}
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if *state == EntryState::Normal && *size == SIZE_FROM_OTHER_PARENT
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{
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other_parent.insert(filename.to_owned());
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}
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}
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self.non_normal_set = Some(non_normal);
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self.other_parent_set = Some(other_parent);
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}
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/// Both of these setters and their uses appear to be the simplest way to
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/// emulate a Python lazy property, but it is ugly and unidiomatic.
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/// TODO One day, rewriting this struct using the typestate might be a
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/// good idea.
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pub fn set_all_dirs(&mut self) -> Result<(), DirstateMapError> {
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if self.all_dirs.is_none() {
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self.all_dirs =
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Some(DirsMultiset::from_dirstate(&self.state_map, None)?);
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}
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Ok(())
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}
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pub fn set_dirs(&mut self) -> Result<(), DirstateMapError> {
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if self.dirs.is_none() {
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self.dirs = Some(DirsMultiset::from_dirstate(
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&self.state_map,
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Some(EntryState::Removed),
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)?);
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}
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Ok(())
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}
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pub 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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self.set_dirs()?;
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Ok(self.dirs.as_ref().unwrap().contains(directory))
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}
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pub 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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self.set_all_dirs()?;
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Ok(self.all_dirs.as_ref().unwrap().contains(directory))
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}
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pub 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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if let Some(ref parents) = self.parents {
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return Ok(parents);
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}
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let parents;
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if file_contents.len() == PARENT_SIZE * 2 {
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parents = DirstateParents {
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p1: file_contents[..PARENT_SIZE].try_into().unwrap(),
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p2: file_contents[PARENT_SIZE..PARENT_SIZE * 2]
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.try_into()
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.unwrap(),
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};
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} else if file_contents.is_empty() {
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parents = DirstateParents {
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p1: NULL_ID,
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p2: NULL_ID,
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};
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} else {
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return Err(DirstateError::Parse(DirstateParseError::Damaged));
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}
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self.parents = Some(parents);
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Ok(self.parents.as_ref().unwrap())
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}
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pub 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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pub fn read(
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&mut self,
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file_contents: &[u8],
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) -> Result<Option<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(
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&mut self.state_map,
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&mut self.copy_map,
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file_contents,
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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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pub 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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let packed =
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pack_dirstate(&mut self.state_map, &self.copy_map, parents, now)?;
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self.dirty_parents = false;
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self.set_non_normal_other_parent_entries(true);
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Ok(packed)
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}
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pub fn build_file_fold_map(&mut self) -> &FileFoldMap {
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if let Some(ref file_fold_map) = self.file_fold_map {
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return file_fold_map;
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}
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let mut new_file_fold_map = FileFoldMap::default();
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for (filename, DirstateEntry { state, .. }) in self.state_map.borrow()
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{
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if *state == EntryState::Removed {
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new_file_fold_map
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.insert(normalize_case(filename), filename.to_owned());
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}
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}
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self.file_fold_map = Some(new_file_fold_map);
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self.file_fold_map.as_ref().unwrap()
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}
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}
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#[cfg(test)]
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mod tests {
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use super::*;
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#[test]
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fn test_dirs_multiset() {
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let mut map = DirstateMap::new();
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assert!(map.dirs.is_none());
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assert!(map.all_dirs.is_none());
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assert_eq!(map.has_dir(HgPath::new(b"nope")).unwrap(), false);
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assert!(map.all_dirs.is_some());
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assert!(map.dirs.is_none());
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assert_eq!(map.has_tracked_dir(HgPath::new(b"nope")).unwrap(), false);
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assert!(map.dirs.is_some());
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}
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#[test]
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fn test_add_file() {
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let mut map = DirstateMap::new();
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assert_eq!(0, map.len());
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map.add_file(
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HgPath::new(b"meh"),
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EntryState::Normal,
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DirstateEntry {
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state: EntryState::Normal,
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mode: 1337,
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mtime: 1337,
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size: 1337,
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},
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)
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.unwrap();
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assert_eq!(1, map.len());
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assert_eq!(0, map.get_non_normal_other_parent_entries().0.len());
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assert_eq!(0, map.get_non_normal_other_parent_entries().1.len());
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}
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#[test]
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fn test_non_normal_other_parent_entries() {
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let mut map: DirstateMap = [
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(b"f1", (EntryState::Removed, 1337, 1337, 1337)),
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(b"f2", (EntryState::Normal, 1337, 1337, -1)),
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(b"f3", (EntryState::Normal, 1337, 1337, 1337)),
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(b"f4", (EntryState::Normal, 1337, -2, 1337)),
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(b"f5", (EntryState::Added, 1337, 1337, 1337)),
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(b"f6", (EntryState::Added, 1337, 1337, -1)),
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(b"f7", (EntryState::Merged, 1337, 1337, -1)),
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(b"f8", (EntryState::Merged, 1337, 1337, 1337)),
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(b"f9", (EntryState::Merged, 1337, -2, 1337)),
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(b"fa", (EntryState::Added, 1337, -2, 1337)),
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(b"fb", (EntryState::Removed, 1337, -2, 1337)),
|
|
|
]
|
|
|
.iter()
|
|
|
.map(|(fname, (state, mode, size, mtime))| {
|
|
|
(
|
|
|
HgPathBuf::from_bytes(fname.as_ref()),
|
|
|
DirstateEntry {
|
|
|
state: *state,
|
|
|
mode: *mode,
|
|
|
size: *size,
|
|
|
mtime: *mtime,
|
|
|
},
|
|
|
)
|
|
|
})
|
|
|
.collect();
|
|
|
|
|
|
let mut non_normal = [
|
|
|
b"f1", b"f2", b"f5", b"f6", b"f7", b"f8", b"f9", b"fa", b"fb",
|
|
|
]
|
|
|
.iter()
|
|
|
.map(|x| HgPathBuf::from_bytes(x.as_ref()))
|
|
|
.collect();
|
|
|
|
|
|
let mut other_parent = HashSet::new();
|
|
|
other_parent.insert(HgPathBuf::from_bytes(b"f4"));
|
|
|
let entries = map.get_non_normal_other_parent_entries();
|
|
|
|
|
|
assert_eq!(
|
|
|
(&mut non_normal, &mut other_parent),
|
|
|
(entries.0, entries.1)
|
|
|
);
|
|
|
}
|
|
|
}
|
|
|
|
