|
|
// 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.
|
|
|
|
|
|
use crate::utils::hg_path::HgPath;
|
|
|
use crate::{
|
|
|
dirstate::{CopyMap, EntryState, StateMap},
|
|
|
DirstateEntry, DirstatePackError, DirstateParents, DirstateParseError,
|
|
|
};
|
|
|
use byteorder::{BigEndian, ReadBytesExt, WriteBytesExt};
|
|
|
use std::convert::{TryFrom, TryInto};
|
|
|
use std::io::Cursor;
|
|
|
use std::time::Duration;
|
|
|
|
|
|
/// Parents are stored in the dirstate as byte hashes.
|
|
|
pub const PARENT_SIZE: usize = 20;
|
|
|
/// Dirstate entries have a static part of 8 + 32 + 32 + 32 + 32 bits.
|
|
|
const MIN_ENTRY_SIZE: usize = 17;
|
|
|
|
|
|
// TODO parse/pack: is mutate-on-loop better for performance?
|
|
|
|
|
|
pub fn parse_dirstate(
|
|
|
state_map: &mut StateMap,
|
|
|
copy_map: &mut CopyMap,
|
|
|
contents: &[u8],
|
|
|
) -> Result<DirstateParents, DirstateParseError> {
|
|
|
if contents.len() < PARENT_SIZE * 2 {
|
|
|
return Err(DirstateParseError::TooLittleData);
|
|
|
}
|
|
|
|
|
|
let mut curr_pos = PARENT_SIZE * 2;
|
|
|
let parents = DirstateParents {
|
|
|
p1: contents[..PARENT_SIZE].try_into().unwrap(),
|
|
|
p2: contents[PARENT_SIZE..curr_pos].try_into().unwrap(),
|
|
|
};
|
|
|
|
|
|
while curr_pos < contents.len() {
|
|
|
if curr_pos + MIN_ENTRY_SIZE > contents.len() {
|
|
|
return Err(DirstateParseError::Overflow);
|
|
|
}
|
|
|
let entry_bytes = &contents[curr_pos..];
|
|
|
|
|
|
let mut cursor = Cursor::new(entry_bytes);
|
|
|
let state = EntryState::try_from(cursor.read_u8()?)?;
|
|
|
let mode = cursor.read_i32::<BigEndian>()?;
|
|
|
let size = cursor.read_i32::<BigEndian>()?;
|
|
|
let mtime = cursor.read_i32::<BigEndian>()?;
|
|
|
let path_len = cursor.read_i32::<BigEndian>()? as usize;
|
|
|
|
|
|
if path_len > contents.len() - curr_pos {
|
|
|
return Err(DirstateParseError::Overflow);
|
|
|
}
|
|
|
|
|
|
// Slice instead of allocating a Vec needed for `read_exact`
|
|
|
let path = &entry_bytes[MIN_ENTRY_SIZE..MIN_ENTRY_SIZE + (path_len)];
|
|
|
|
|
|
let (path, copy) = match memchr::memchr(0, path) {
|
|
|
None => (path, None),
|
|
|
Some(i) => (&path[..i], Some(&path[(i + 1)..])),
|
|
|
};
|
|
|
|
|
|
if let Some(copy_path) = copy {
|
|
|
copy_map.insert(
|
|
|
HgPath::new(path).to_owned(),
|
|
|
HgPath::new(copy_path).to_owned(),
|
|
|
);
|
|
|
};
|
|
|
state_map.insert(
|
|
|
HgPath::new(path).to_owned(),
|
|
|
DirstateEntry {
|
|
|
state,
|
|
|
mode,
|
|
|
size,
|
|
|
mtime,
|
|
|
},
|
|
|
);
|
|
|
curr_pos = curr_pos + MIN_ENTRY_SIZE + (path_len);
|
|
|
}
|
|
|
|
|
|
Ok(parents)
|
|
|
}
|
|
|
|
|
|
/// `now` is the duration in seconds since the Unix epoch
|
|
|
pub fn pack_dirstate(
|
|
|
state_map: &mut StateMap,
|
|
|
copy_map: &CopyMap,
|
|
|
parents: DirstateParents,
|
|
|
now: Duration,
|
|
|
) -> Result<Vec<u8>, DirstatePackError> {
|
|
|
// TODO move away from i32 before 2038.
|
|
|
let now: i32 = now.as_secs().try_into().expect("time overflow");
|
|
|
|
|
|
let expected_size: usize = state_map
|
|
|
.iter()
|
|
|
.map(|(filename, _)| {
|
|
|
let mut length = MIN_ENTRY_SIZE + filename.len();
|
|
|
if let Some(copy) = copy_map.get(filename) {
|
|
|
length += copy.len() + 1;
|
|
|
}
|
|
|
length
|
|
|
})
|
|
|
.sum();
|
|
|
let expected_size = expected_size + PARENT_SIZE * 2;
|
|
|
|
|
|
let mut packed = Vec::with_capacity(expected_size);
|
|
|
let mut new_state_map = vec![];
|
|
|
|
|
|
packed.extend(&parents.p1);
|
|
|
packed.extend(&parents.p2);
|
|
|
|
|
|
for (filename, entry) in state_map.iter() {
|
|
|
let new_filename = filename.to_owned();
|
|
|
let mut new_mtime: i32 = entry.mtime;
|
|
|
if entry.state == EntryState::Normal && entry.mtime == now {
|
|
|
// The file was last modified "simultaneously" with the current
|
|
|
// write to dirstate (i.e. within the same second for file-
|
|
|
// systems with a granularity of 1 sec). This commonly happens
|
|
|
// for at least a couple of files on 'update'.
|
|
|
// The user could change the file without changing its size
|
|
|
// within the same second. Invalidate the file's mtime in
|
|
|
// dirstate, forcing future 'status' calls to compare the
|
|
|
// contents of the file if the size is the same. This prevents
|
|
|
// mistakenly treating such files as clean.
|
|
|
new_mtime = -1;
|
|
|
new_state_map.push((
|
|
|
filename.to_owned(),
|
|
|
DirstateEntry {
|
|
|
mtime: new_mtime,
|
|
|
..*entry
|
|
|
},
|
|
|
));
|
|
|
}
|
|
|
let mut new_filename = new_filename.into_vec();
|
|
|
if let Some(copy) = copy_map.get(filename) {
|
|
|
new_filename.push('\0' as u8);
|
|
|
new_filename.extend(copy.bytes());
|
|
|
}
|
|
|
|
|
|
packed.write_u8(entry.state.into())?;
|
|
|
packed.write_i32::<BigEndian>(entry.mode)?;
|
|
|
packed.write_i32::<BigEndian>(entry.size)?;
|
|
|
packed.write_i32::<BigEndian>(new_mtime)?;
|
|
|
packed.write_i32::<BigEndian>(new_filename.len() as i32)?;
|
|
|
packed.extend(new_filename)
|
|
|
}
|
|
|
|
|
|
if packed.len() != expected_size {
|
|
|
return Err(DirstatePackError::BadSize(expected_size, packed.len()));
|
|
|
}
|
|
|
|
|
|
state_map.extend(new_state_map);
|
|
|
|
|
|
Ok(packed)
|
|
|
}
|
|
|
|
|
|
#[cfg(test)]
|
|
|
mod tests {
|
|
|
use super::*;
|
|
|
use crate::utils::hg_path::HgPathBuf;
|
|
|
use std::collections::HashMap;
|
|
|
|
|
|
#[test]
|
|
|
fn test_pack_dirstate_empty() {
|
|
|
let mut state_map: StateMap = HashMap::new();
|
|
|
let copymap = HashMap::new();
|
|
|
let parents = DirstateParents {
|
|
|
p1: *b"12345678910111213141",
|
|
|
p2: *b"00000000000000000000",
|
|
|
};
|
|
|
let now = Duration::new(15000000, 0);
|
|
|
let expected = b"1234567891011121314100000000000000000000".to_vec();
|
|
|
|
|
|
assert_eq!(
|
|
|
expected,
|
|
|
pack_dirstate(&mut state_map, ©map, parents, now).unwrap()
|
|
|
);
|
|
|
|
|
|
assert!(state_map.is_empty())
|
|
|
}
|
|
|
#[test]
|
|
|
fn test_pack_dirstate_one_entry() {
|
|
|
let expected_state_map: StateMap = [(
|
|
|
HgPathBuf::from_bytes(b"f1"),
|
|
|
DirstateEntry {
|
|
|
state: EntryState::Normal,
|
|
|
mode: 0o644,
|
|
|
size: 0,
|
|
|
mtime: 791231220,
|
|
|
},
|
|
|
)]
|
|
|
.iter()
|
|
|
.cloned()
|
|
|
.collect();
|
|
|
let mut state_map = expected_state_map.clone();
|
|
|
|
|
|
let copymap = HashMap::new();
|
|
|
let parents = DirstateParents {
|
|
|
p1: *b"12345678910111213141",
|
|
|
p2: *b"00000000000000000000",
|
|
|
};
|
|
|
let now = Duration::new(15000000, 0);
|
|
|
let expected = [
|
|
|
49, 50, 51, 52, 53, 54, 55, 56, 57, 49, 48, 49, 49, 49, 50, 49,
|
|
|
51, 49, 52, 49, 48, 48, 48, 48, 48, 48, 48, 48, 48, 48, 48, 48,
|
|
|
48, 48, 48, 48, 48, 48, 48, 48, 110, 0, 0, 1, 164, 0, 0, 0, 0, 47,
|
|
|
41, 58, 244, 0, 0, 0, 2, 102, 49,
|
|
|
]
|
|
|
.to_vec();
|
|
|
|
|
|
assert_eq!(
|
|
|
expected,
|
|
|
pack_dirstate(&mut state_map, ©map, parents, now).unwrap()
|
|
|
);
|
|
|
|
|
|
assert_eq!(expected_state_map, state_map);
|
|
|
}
|
|
|
#[test]
|
|
|
fn test_pack_dirstate_one_entry_with_copy() {
|
|
|
let expected_state_map: StateMap = [(
|
|
|
HgPathBuf::from_bytes(b"f1"),
|
|
|
DirstateEntry {
|
|
|
state: EntryState::Normal,
|
|
|
mode: 0o644,
|
|
|
size: 0,
|
|
|
mtime: 791231220,
|
|
|
},
|
|
|
)]
|
|
|
.iter()
|
|
|
.cloned()
|
|
|
.collect();
|
|
|
let mut state_map = expected_state_map.clone();
|
|
|
let mut copymap = HashMap::new();
|
|
|
copymap.insert(
|
|
|
HgPathBuf::from_bytes(b"f1"),
|
|
|
HgPathBuf::from_bytes(b"copyname"),
|
|
|
);
|
|
|
let parents = DirstateParents {
|
|
|
p1: *b"12345678910111213141",
|
|
|
p2: *b"00000000000000000000",
|
|
|
};
|
|
|
let now = Duration::new(15000000, 0);
|
|
|
let expected = [
|
|
|
49, 50, 51, 52, 53, 54, 55, 56, 57, 49, 48, 49, 49, 49, 50, 49,
|
|
|
51, 49, 52, 49, 48, 48, 48, 48, 48, 48, 48, 48, 48, 48, 48, 48,
|
|
|
48, 48, 48, 48, 48, 48, 48, 48, 110, 0, 0, 1, 164, 0, 0, 0, 0, 47,
|
|
|
41, 58, 244, 0, 0, 0, 11, 102, 49, 0, 99, 111, 112, 121, 110, 97,
|
|
|
109, 101,
|
|
|
]
|
|
|
.to_vec();
|
|
|
|
|
|
assert_eq!(
|
|
|
expected,
|
|
|
pack_dirstate(&mut state_map, ©map, parents, now).unwrap()
|
|
|
);
|
|
|
assert_eq!(expected_state_map, state_map);
|
|
|
}
|
|
|
|
|
|
#[test]
|
|
|
fn test_parse_pack_one_entry_with_copy() {
|
|
|
let mut state_map: StateMap = [(
|
|
|
HgPathBuf::from_bytes(b"f1"),
|
|
|
DirstateEntry {
|
|
|
state: EntryState::Normal,
|
|
|
mode: 0o644,
|
|
|
size: 0,
|
|
|
mtime: 791231220,
|
|
|
},
|
|
|
)]
|
|
|
.iter()
|
|
|
.cloned()
|
|
|
.collect();
|
|
|
let mut copymap = HashMap::new();
|
|
|
copymap.insert(
|
|
|
HgPathBuf::from_bytes(b"f1"),
|
|
|
HgPathBuf::from_bytes(b"copyname"),
|
|
|
);
|
|
|
let parents = DirstateParents {
|
|
|
p1: *b"12345678910111213141",
|
|
|
p2: *b"00000000000000000000",
|
|
|
};
|
|
|
let now = Duration::new(15000000, 0);
|
|
|
let result =
|
|
|
pack_dirstate(&mut state_map, ©map, parents.clone(), now)
|
|
|
.unwrap();
|
|
|
|
|
|
let mut new_state_map: StateMap = HashMap::new();
|
|
|
let mut new_copy_map: CopyMap = HashMap::new();
|
|
|
let new_parents = parse_dirstate(
|
|
|
&mut new_state_map,
|
|
|
&mut new_copy_map,
|
|
|
result.as_slice(),
|
|
|
)
|
|
|
.unwrap();
|
|
|
assert_eq!(
|
|
|
(parents, state_map, copymap),
|
|
|
(new_parents, new_state_map, new_copy_map)
|
|
|
)
|
|
|
}
|
|
|
|
|
|
#[test]
|
|
|
fn test_parse_pack_multiple_entries_with_copy() {
|
|
|
let mut state_map: StateMap = [
|
|
|
(
|
|
|
HgPathBuf::from_bytes(b"f1"),
|
|
|
DirstateEntry {
|
|
|
state: EntryState::Normal,
|
|
|
mode: 0o644,
|
|
|
size: 0,
|
|
|
mtime: 791231220,
|
|
|
},
|
|
|
),
|
|
|
(
|
|
|
HgPathBuf::from_bytes(b"f2"),
|
|
|
DirstateEntry {
|
|
|
state: EntryState::Merged,
|
|
|
mode: 0o777,
|
|
|
size: 1000,
|
|
|
mtime: 791231220,
|
|
|
},
|
|
|
),
|
|
|
(
|
|
|
HgPathBuf::from_bytes(b"f3"),
|
|
|
DirstateEntry {
|
|
|
state: EntryState::Removed,
|
|
|
mode: 0o644,
|
|
|
size: 234553,
|
|
|
mtime: 791231220,
|
|
|
},
|
|
|
),
|
|
|
(
|
|
|
HgPathBuf::from_bytes(b"f4\xF6"),
|
|
|
DirstateEntry {
|
|
|
state: EntryState::Added,
|
|
|
mode: 0o644,
|
|
|
size: -1,
|
|
|
mtime: -1,
|
|
|
},
|
|
|
),
|
|
|
]
|
|
|
.iter()
|
|
|
.cloned()
|
|
|
.collect();
|
|
|
let mut copymap = HashMap::new();
|
|
|
copymap.insert(
|
|
|
HgPathBuf::from_bytes(b"f1"),
|
|
|
HgPathBuf::from_bytes(b"copyname"),
|
|
|
);
|
|
|
copymap.insert(
|
|
|
HgPathBuf::from_bytes(b"f4\xF6"),
|
|
|
HgPathBuf::from_bytes(b"copyname2"),
|
|
|
);
|
|
|
let parents = DirstateParents {
|
|
|
p1: *b"12345678910111213141",
|
|
|
p2: *b"00000000000000000000",
|
|
|
};
|
|
|
let now = Duration::new(15000000, 0);
|
|
|
let result =
|
|
|
pack_dirstate(&mut state_map, ©map, parents.clone(), now)
|
|
|
.unwrap();
|
|
|
|
|
|
let mut new_state_map: StateMap = HashMap::new();
|
|
|
let mut new_copy_map: CopyMap = HashMap::new();
|
|
|
let new_parents = parse_dirstate(
|
|
|
&mut new_state_map,
|
|
|
&mut new_copy_map,
|
|
|
result.as_slice(),
|
|
|
)
|
|
|
.unwrap();
|
|
|
assert_eq!(
|
|
|
(parents, state_map, copymap),
|
|
|
(new_parents, new_state_map, new_copy_map)
|
|
|
)
|
|
|
}
|
|
|
|
|
|
#[test]
|
|
|
/// https://www.mercurial-scm.org/repo/hg/rev/af3f26b6bba4
|
|
|
fn test_parse_pack_one_entry_with_copy_and_time_conflict() {
|
|
|
let mut state_map: StateMap = [(
|
|
|
HgPathBuf::from_bytes(b"f1"),
|
|
|
DirstateEntry {
|
|
|
state: EntryState::Normal,
|
|
|
mode: 0o644,
|
|
|
size: 0,
|
|
|
mtime: 15000000,
|
|
|
},
|
|
|
)]
|
|
|
.iter()
|
|
|
.cloned()
|
|
|
.collect();
|
|
|
let mut copymap = HashMap::new();
|
|
|
copymap.insert(
|
|
|
HgPathBuf::from_bytes(b"f1"),
|
|
|
HgPathBuf::from_bytes(b"copyname"),
|
|
|
);
|
|
|
let parents = DirstateParents {
|
|
|
p1: *b"12345678910111213141",
|
|
|
p2: *b"00000000000000000000",
|
|
|
};
|
|
|
let now = Duration::new(15000000, 0);
|
|
|
let result =
|
|
|
pack_dirstate(&mut state_map, ©map, parents.clone(), now)
|
|
|
.unwrap();
|
|
|
|
|
|
let mut new_state_map: StateMap = HashMap::new();
|
|
|
let mut new_copy_map: CopyMap = HashMap::new();
|
|
|
let new_parents = parse_dirstate(
|
|
|
&mut new_state_map,
|
|
|
&mut new_copy_map,
|
|
|
result.as_slice(),
|
|
|
)
|
|
|
.unwrap();
|
|
|
|
|
|
assert_eq!(
|
|
|
(
|
|
|
parents,
|
|
|
[(
|
|
|
HgPathBuf::from_bytes(b"f1"),
|
|
|
DirstateEntry {
|
|
|
state: EntryState::Normal,
|
|
|
mode: 0o644,
|
|
|
size: 0,
|
|
|
mtime: -1
|
|
|
}
|
|
|
)]
|
|
|
.iter()
|
|
|
.cloned()
|
|
|
.collect::<StateMap>(),
|
|
|
copymap,
|
|
|
),
|
|
|
(new_parents, new_state_map, new_copy_map)
|
|
|
)
|
|
|
}
|
|
|
}
|
|
|
|
