|
|
// dirs_multiset.rs
|
|
|
//
|
|
|
// Copyright 2019 Raphaël Gomès <rgomes@octobus.net>
|
|
|
//
|
|
|
// This software may be used and distributed according to the terms of the
|
|
|
// GNU General Public License version 2 or any later version.
|
|
|
|
|
|
//! A multiset of directory names.
|
|
|
//!
|
|
|
//! Used to counts the references to directories in a manifest or dirstate.
|
|
|
use crate::dirstate_tree::on_disk::DirstateV2ParseError;
|
|
|
use crate::{
|
|
|
utils::{
|
|
|
files,
|
|
|
hg_path::{HgPath, HgPathBuf, HgPathError},
|
|
|
},
|
|
|
DirstateEntry, DirstateError, DirstateMapError, FastHashMap,
|
|
|
};
|
|
|
use std::collections::{hash_map, hash_map::Entry, HashMap, HashSet};
|
|
|
|
|
|
// could be encapsulated if we care API stability more seriously
|
|
|
pub type DirsMultisetIter<'a> = hash_map::Keys<'a, HgPathBuf, u32>;
|
|
|
|
|
|
#[derive(PartialEq, Debug)]
|
|
|
pub struct DirsMultiset {
|
|
|
inner: FastHashMap<HgPathBuf, u32>,
|
|
|
}
|
|
|
|
|
|
impl DirsMultiset {
|
|
|
/// Initializes the multiset from a dirstate.
|
|
|
///
|
|
|
/// If `skip_state` is provided, skips dirstate entries with equal state.
|
|
|
pub fn from_dirstate<I, P>(
|
|
|
dirstate: I,
|
|
|
only_tracked: bool,
|
|
|
) -> Result<Self, DirstateError>
|
|
|
where
|
|
|
I: IntoIterator<
|
|
|
Item = Result<(P, DirstateEntry), DirstateV2ParseError>,
|
|
|
>,
|
|
|
P: AsRef<HgPath>,
|
|
|
{
|
|
|
let mut multiset = DirsMultiset {
|
|
|
inner: FastHashMap::default(),
|
|
|
};
|
|
|
for item in dirstate {
|
|
|
let (filename, entry) = item?;
|
|
|
let filename = filename.as_ref();
|
|
|
// This `if` is optimized out of the loop
|
|
|
if only_tracked {
|
|
|
if !entry.removed() {
|
|
|
multiset.add_path(filename)?;
|
|
|
}
|
|
|
} else {
|
|
|
multiset.add_path(filename)?;
|
|
|
}
|
|
|
}
|
|
|
|
|
|
Ok(multiset)
|
|
|
}
|
|
|
|
|
|
/// Initializes the multiset from a manifest.
|
|
|
pub fn from_manifest(
|
|
|
manifest: &[impl AsRef<HgPath>],
|
|
|
) -> Result<Self, DirstateMapError> {
|
|
|
let mut multiset = DirsMultiset {
|
|
|
inner: FastHashMap::default(),
|
|
|
};
|
|
|
|
|
|
for filename in manifest {
|
|
|
multiset.add_path(filename.as_ref())?;
|
|
|
}
|
|
|
|
|
|
Ok(multiset)
|
|
|
}
|
|
|
|
|
|
/// Increases the count of deepest directory contained in the path.
|
|
|
///
|
|
|
/// If the directory is not yet in the map, adds its parents.
|
|
|
pub fn add_path(
|
|
|
&mut self,
|
|
|
path: impl AsRef<HgPath>,
|
|
|
) -> Result<(), DirstateMapError> {
|
|
|
for subpath in files::find_dirs(path.as_ref()) {
|
|
|
if subpath.as_bytes().last() == Some(&b'/') {
|
|
|
// TODO Remove this once PathAuditor is certified
|
|
|
// as the only entrypoint for path data
|
|
|
let second_slash_index = subpath.len() - 1;
|
|
|
|
|
|
return Err(DirstateMapError::InvalidPath(
|
|
|
HgPathError::ConsecutiveSlashes {
|
|
|
bytes: path.as_ref().as_bytes().to_owned(),
|
|
|
second_slash_index,
|
|
|
},
|
|
|
));
|
|
|
}
|
|
|
if let Some(val) = self.inner.get_mut(subpath) {
|
|
|
*val += 1;
|
|
|
break;
|
|
|
}
|
|
|
self.inner.insert(subpath.to_owned(), 1);
|
|
|
}
|
|
|
Ok(())
|
|
|
}
|
|
|
|
|
|
/// Decreases the count of deepest directory contained in the path.
|
|
|
///
|
|
|
/// If it is the only reference, decreases all parents until one is
|
|
|
/// removed.
|
|
|
/// If the directory is not in the map, something horrible has happened.
|
|
|
pub fn delete_path(
|
|
|
&mut self,
|
|
|
path: impl AsRef<HgPath>,
|
|
|
) -> Result<(), DirstateMapError> {
|
|
|
for subpath in files::find_dirs(path.as_ref()) {
|
|
|
match self.inner.entry(subpath.to_owned()) {
|
|
|
Entry::Occupied(mut entry) => {
|
|
|
let val = *entry.get();
|
|
|
if val > 1 {
|
|
|
entry.insert(val - 1);
|
|
|
break;
|
|
|
}
|
|
|
entry.remove();
|
|
|
}
|
|
|
Entry::Vacant(_) => {
|
|
|
return Err(DirstateMapError::PathNotFound(
|
|
|
path.as_ref().to_owned(),
|
|
|
))
|
|
|
}
|
|
|
};
|
|
|
}
|
|
|
|
|
|
Ok(())
|
|
|
}
|
|
|
|
|
|
pub fn contains(&self, key: impl AsRef<HgPath>) -> bool {
|
|
|
self.inner.contains_key(key.as_ref())
|
|
|
}
|
|
|
|
|
|
pub fn iter(&self) -> DirsMultisetIter {
|
|
|
self.inner.keys()
|
|
|
}
|
|
|
|
|
|
pub fn len(&self) -> usize {
|
|
|
self.inner.len()
|
|
|
}
|
|
|
|
|
|
pub fn is_empty(&self) -> bool {
|
|
|
self.len() == 0
|
|
|
}
|
|
|
}
|
|
|
|
|
|
/// This is basically a reimplementation of `DirsMultiset` that stores the
|
|
|
/// children instead of just a count of them, plus a small optional
|
|
|
/// optimization to avoid some directories we don't need.
|
|
|
#[derive(PartialEq, Debug)]
|
|
|
pub struct DirsChildrenMultiset<'a> {
|
|
|
inner: FastHashMap<&'a HgPath, HashSet<&'a HgPath>>,
|
|
|
only_include: Option<HashSet<&'a HgPath>>,
|
|
|
}
|
|
|
|
|
|
impl<'a> DirsChildrenMultiset<'a> {
|
|
|
pub fn new(
|
|
|
paths: impl Iterator<Item = &'a HgPathBuf>,
|
|
|
only_include: Option<&'a HashSet<impl AsRef<HgPath> + 'a>>,
|
|
|
) -> Self {
|
|
|
let mut new = Self {
|
|
|
inner: HashMap::default(),
|
|
|
only_include: only_include
|
|
|
.map(|s| s.iter().map(AsRef::as_ref).collect()),
|
|
|
};
|
|
|
|
|
|
for path in paths {
|
|
|
new.add_path(path)
|
|
|
}
|
|
|
|
|
|
new
|
|
|
}
|
|
|
fn add_path(&mut self, path: &'a (impl AsRef<HgPath> + 'a)) {
|
|
|
if path.as_ref().is_empty() {
|
|
|
return;
|
|
|
}
|
|
|
for (directory, basename) in files::find_dirs_with_base(path.as_ref())
|
|
|
{
|
|
|
if !self.is_dir_included(directory) {
|
|
|
continue;
|
|
|
}
|
|
|
self.inner
|
|
|
.entry(directory)
|
|
|
.and_modify(|e| {
|
|
|
e.insert(basename);
|
|
|
})
|
|
|
.or_insert_with(|| {
|
|
|
let mut set = HashSet::new();
|
|
|
set.insert(basename);
|
|
|
set
|
|
|
});
|
|
|
}
|
|
|
}
|
|
|
fn is_dir_included(&self, dir: impl AsRef<HgPath>) -> bool {
|
|
|
match &self.only_include {
|
|
|
None => false,
|
|
|
Some(i) => i.contains(dir.as_ref()),
|
|
|
}
|
|
|
}
|
|
|
|
|
|
pub fn get(
|
|
|
&self,
|
|
|
path: impl AsRef<HgPath>,
|
|
|
) -> Option<&HashSet<&'a HgPath>> {
|
|
|
self.inner.get(path.as_ref())
|
|
|
}
|
|
|
}
|
|
|
|
|
|
#[cfg(test)]
|
|
|
mod tests {
|
|
|
use crate::EntryState;
|
|
|
|
|
|
use super::*;
|
|
|
|
|
|
#[test]
|
|
|
fn test_delete_path_path_not_found() {
|
|
|
let manifest: Vec<HgPathBuf> = vec![];
|
|
|
let mut map = DirsMultiset::from_manifest(&manifest).unwrap();
|
|
|
let path = HgPathBuf::from_bytes(b"doesnotexist/");
|
|
|
assert_eq!(
|
|
|
Err(DirstateMapError::PathNotFound(path.to_owned())),
|
|
|
map.delete_path(&path)
|
|
|
);
|
|
|
}
|
|
|
|
|
|
#[test]
|
|
|
fn test_delete_path_empty_path() {
|
|
|
let mut map =
|
|
|
DirsMultiset::from_manifest(&vec![HgPathBuf::new()]).unwrap();
|
|
|
let path = HgPath::new(b"");
|
|
|
assert_eq!(Ok(()), map.delete_path(path));
|
|
|
assert_eq!(
|
|
|
Err(DirstateMapError::PathNotFound(path.to_owned())),
|
|
|
map.delete_path(path)
|
|
|
);
|
|
|
}
|
|
|
|
|
|
#[test]
|
|
|
fn test_delete_path_successful() {
|
|
|
let mut map = DirsMultiset {
|
|
|
inner: [("", 5), ("a", 3), ("a/b", 2), ("a/c", 1)]
|
|
|
.iter()
|
|
|
.map(|(k, v)| (HgPathBuf::from_bytes(k.as_bytes()), *v))
|
|
|
.collect(),
|
|
|
};
|
|
|
|
|
|
assert_eq!(Ok(()), map.delete_path(HgPath::new(b"a/b/")));
|
|
|
eprintln!("{:?}", map);
|
|
|
assert_eq!(Ok(()), map.delete_path(HgPath::new(b"a/b/")));
|
|
|
eprintln!("{:?}", map);
|
|
|
assert_eq!(
|
|
|
Err(DirstateMapError::PathNotFound(HgPathBuf::from_bytes(
|
|
|
b"a/b/"
|
|
|
))),
|
|
|
map.delete_path(HgPath::new(b"a/b/"))
|
|
|
);
|
|
|
|
|
|
assert_eq!(2, *map.inner.get(HgPath::new(b"a")).unwrap());
|
|
|
assert_eq!(1, *map.inner.get(HgPath::new(b"a/c")).unwrap());
|
|
|
eprintln!("{:?}", map);
|
|
|
assert_eq!(Ok(()), map.delete_path(HgPath::new(b"a/")));
|
|
|
eprintln!("{:?}", map);
|
|
|
|
|
|
assert_eq!(Ok(()), map.delete_path(HgPath::new(b"a/c/")));
|
|
|
assert_eq!(
|
|
|
Err(DirstateMapError::PathNotFound(HgPathBuf::from_bytes(
|
|
|
b"a/c/"
|
|
|
))),
|
|
|
map.delete_path(HgPath::new(b"a/c/"))
|
|
|
);
|
|
|
}
|
|
|
|
|
|
#[test]
|
|
|
fn test_add_path_empty_path() {
|
|
|
let manifest: Vec<HgPathBuf> = vec![];
|
|
|
let mut map = DirsMultiset::from_manifest(&manifest).unwrap();
|
|
|
let path = HgPath::new(b"");
|
|
|
map.add_path(path).unwrap();
|
|
|
|
|
|
assert_eq!(1, map.len());
|
|
|
}
|
|
|
|
|
|
#[test]
|
|
|
fn test_add_path_successful() {
|
|
|
let manifest: Vec<HgPathBuf> = vec![];
|
|
|
let mut map = DirsMultiset::from_manifest(&manifest).unwrap();
|
|
|
|
|
|
map.add_path(HgPath::new(b"a/")).unwrap();
|
|
|
assert_eq!(1, *map.inner.get(HgPath::new(b"a")).unwrap());
|
|
|
assert_eq!(1, *map.inner.get(HgPath::new(b"")).unwrap());
|
|
|
assert_eq!(2, map.len());
|
|
|
|
|
|
// Non directory should be ignored
|
|
|
map.add_path(HgPath::new(b"a")).unwrap();
|
|
|
assert_eq!(1, *map.inner.get(HgPath::new(b"a")).unwrap());
|
|
|
assert_eq!(2, map.len());
|
|
|
|
|
|
// Non directory will still add its base
|
|
|
map.add_path(HgPath::new(b"a/b")).unwrap();
|
|
|
assert_eq!(2, *map.inner.get(HgPath::new(b"a")).unwrap());
|
|
|
assert_eq!(2, map.len());
|
|
|
|
|
|
// Duplicate path works
|
|
|
map.add_path(HgPath::new(b"a/")).unwrap();
|
|
|
assert_eq!(3, *map.inner.get(HgPath::new(b"a")).unwrap());
|
|
|
|
|
|
// Nested dir adds to its base
|
|
|
map.add_path(HgPath::new(b"a/b/")).unwrap();
|
|
|
assert_eq!(4, *map.inner.get(HgPath::new(b"a")).unwrap());
|
|
|
assert_eq!(1, *map.inner.get(HgPath::new(b"a/b")).unwrap());
|
|
|
|
|
|
// but not its base's base, because it already existed
|
|
|
map.add_path(HgPath::new(b"a/b/c/")).unwrap();
|
|
|
assert_eq!(4, *map.inner.get(HgPath::new(b"a")).unwrap());
|
|
|
assert_eq!(2, *map.inner.get(HgPath::new(b"a/b")).unwrap());
|
|
|
|
|
|
map.add_path(HgPath::new(b"a/c/")).unwrap();
|
|
|
assert_eq!(1, *map.inner.get(HgPath::new(b"a/c")).unwrap());
|
|
|
|
|
|
let expected = DirsMultiset {
|
|
|
inner: [("", 2), ("a", 5), ("a/b", 2), ("a/b/c", 1), ("a/c", 1)]
|
|
|
.iter()
|
|
|
.map(|(k, v)| (HgPathBuf::from_bytes(k.as_bytes()), *v))
|
|
|
.collect(),
|
|
|
};
|
|
|
assert_eq!(map, expected);
|
|
|
}
|
|
|
|
|
|
#[test]
|
|
|
fn test_dirsmultiset_new_empty() {
|
|
|
let manifest: Vec<HgPathBuf> = vec![];
|
|
|
let new = DirsMultiset::from_manifest(&manifest).unwrap();
|
|
|
let expected = DirsMultiset {
|
|
|
inner: FastHashMap::default(),
|
|
|
};
|
|
|
assert_eq!(expected, new);
|
|
|
|
|
|
let new = DirsMultiset::from_dirstate::<_, HgPathBuf>(
|
|
|
std::iter::empty(),
|
|
|
false,
|
|
|
)
|
|
|
.unwrap();
|
|
|
let expected = DirsMultiset {
|
|
|
inner: FastHashMap::default(),
|
|
|
};
|
|
|
assert_eq!(expected, new);
|
|
|
}
|
|
|
|
|
|
#[test]
|
|
|
fn test_dirsmultiset_new_no_skip() {
|
|
|
let input_vec: Vec<HgPathBuf> = ["a/", "b/", "a/c", "a/d/"]
|
|
|
.iter()
|
|
|
.map(|e| HgPathBuf::from_bytes(e.as_bytes()))
|
|
|
.collect();
|
|
|
let expected_inner = [("", 2), ("a", 3), ("b", 1), ("a/d", 1)]
|
|
|
.iter()
|
|
|
.map(|(k, v)| (HgPathBuf::from_bytes(k.as_bytes()), *v))
|
|
|
.collect();
|
|
|
|
|
|
let new = DirsMultiset::from_manifest(&input_vec).unwrap();
|
|
|
let expected = DirsMultiset {
|
|
|
inner: expected_inner,
|
|
|
};
|
|
|
assert_eq!(expected, new);
|
|
|
|
|
|
let input_map = ["b/x", "a/c", "a/d/x"].iter().map(|f| {
|
|
|
Ok((
|
|
|
HgPathBuf::from_bytes(f.as_bytes()),
|
|
|
DirstateEntry::from_v1_data(EntryState::Normal, 0, 0, 0),
|
|
|
))
|
|
|
});
|
|
|
let expected_inner = [("", 2), ("a", 2), ("b", 1), ("a/d", 1)]
|
|
|
.iter()
|
|
|
.map(|(k, v)| (HgPathBuf::from_bytes(k.as_bytes()), *v))
|
|
|
.collect();
|
|
|
|
|
|
let new = DirsMultiset::from_dirstate(input_map, false).unwrap();
|
|
|
let expected = DirsMultiset {
|
|
|
inner: expected_inner,
|
|
|
};
|
|
|
assert_eq!(expected, new);
|
|
|
}
|
|
|
|
|
|
#[test]
|
|
|
fn test_dirsmultiset_new_skip() {
|
|
|
let input_map = [
|
|
|
("a/", EntryState::Normal),
|
|
|
("a/b", EntryState::Normal),
|
|
|
("a/c", EntryState::Removed),
|
|
|
("a/d", EntryState::Merged),
|
|
|
]
|
|
|
.iter()
|
|
|
.map(|(f, state)| {
|
|
|
Ok((
|
|
|
HgPathBuf::from_bytes(f.as_bytes()),
|
|
|
DirstateEntry::from_v1_data(*state, 0, 0, 0),
|
|
|
))
|
|
|
});
|
|
|
|
|
|
// "a" incremented with "a/c" and "a/d/"
|
|
|
let expected_inner = [("", 1), ("a", 3)]
|
|
|
.iter()
|
|
|
.map(|(k, v)| (HgPathBuf::from_bytes(k.as_bytes()), *v))
|
|
|
.collect();
|
|
|
|
|
|
let new = DirsMultiset::from_dirstate(input_map, true).unwrap();
|
|
|
let expected = DirsMultiset {
|
|
|
inner: expected_inner,
|
|
|
};
|
|
|
assert_eq!(expected, new);
|
|
|
}
|
|
|
}
|
|
|
|
