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rust-dirstate: create dirstate submodule...
rust-dirstate: create dirstate submodule This change is here to facilitate a future patch that is written in a different file. I expect this module to grow a few different files. Differential Revision: https://phab.mercurial-scm.org/D6389

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lib.rs
102 lines | 2.7 KiB | application/rls-services+xml | RustLexer
// Copyright 2018 Georges Racinet <gracinet@anybox.fr>
//
// This software may be used and distributed according to the terms of the
// GNU General Public License version 2 or any later version.
extern crate byteorder;
extern crate memchr;
#[macro_use]
extern crate lazy_static;
extern crate regex;
mod ancestors;
pub mod dagops;
pub use ancestors::{AncestorsIterator, LazyAncestors, MissingAncestors};
mod dirstate;
pub mod discovery;
pub mod testing; // unconditionally built, for use from integration tests
pub use dirstate::{
parsers::{pack_dirstate, parse_dirstate},
CopyVec, CopyVecEntry, DirstateEntry, DirstateParents, DirstateVec,
};
mod filepatterns;
pub use filepatterns::{
build_single_regex, read_pattern_file, PatternSyntax, PatternTuple,
};
/// Mercurial revision numbers
///
/// As noted in revlog.c, revision numbers are actually encoded in
/// 4 bytes, and are liberally converted to ints, whence the i32
pub type Revision = i32;
/// Marker expressing the absence of a parent
///
/// Independently of the actual representation, `NULL_REVISION` is guaranteed
/// to be smaller that all existing revisions.
pub const NULL_REVISION: Revision = -1;
/// Same as `mercurial.node.wdirrev`
///
/// This is also equal to `i32::max_value()`, but it's better to spell
/// it out explicitely, same as in `mercurial.node`
pub const WORKING_DIRECTORY_REVISION: Revision = 0x7fffffff;
/// The simplest expression of what we need of Mercurial DAGs.
pub trait Graph {
/// Return the two parents of the given `Revision`.
///
/// Each of the parents can be independently `NULL_REVISION`
fn parents(&self, Revision) -> Result<[Revision; 2], GraphError>;
}
pub type LineNumber = usize;
#[derive(Clone, Debug, PartialEq)]
pub enum GraphError {
ParentOutOfRange(Revision),
WorkingDirectoryUnsupported,
}
#[derive(Clone, Debug, PartialEq)]
pub enum DirstateParseError {
TooLittleData,
Overflow,
CorruptedEntry(String),
}
#[derive(Debug, PartialEq)]
pub enum DirstatePackError {
CorruptedEntry(String),
CorruptedParent,
BadSize(usize, usize),
}
impl From<std::io::Error> for DirstatePackError {
fn from(e: std::io::Error) -> Self {
DirstatePackError::CorruptedEntry(e.to_string())
}
}
impl From<std::io::Error> for DirstateParseError {
fn from(e: std::io::Error) -> Self {
DirstateParseError::CorruptedEntry(e.to_string())
}
}
#[derive(Debug)]
pub enum PatternError {
UnsupportedSyntax(String),
}
#[derive(Debug)]
pub enum PatternFileError {
IO(std::io::Error),
Pattern(PatternError, LineNumber),
}
impl From<std::io::Error> for PatternFileError {
fn from(e: std::io::Error) -> Self {
PatternFileError::IO(e)
}
}