annotate rust/hg-core/src/dirstate.rs @ 46243:63c923fd7fa8

setup: when possible, build and bundle man pages

This makes it so the manual pages are built as part of the Python
build, and includes them in any wheel generated. This should make
Python wheels a much more useful and complete way of distributing
Mercurial binaries.

Differential Revision: https://phab.mercurial-scm.org/D9640

// dirstate module
//
// Copyright 2019 Raphaël Gomès <[e-mail]>
//
// 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::HgPathBuf, DirstateParseError, FastHashMap};
use std::collections::hash_map;
use std::convert::TryFrom;

pub mod dirs_multiset;
pub mod dirstate_map;
#[cfg(feature = "dirstate-tree")]
pub mod dirstate_tree;
pub mod parsers;
pub mod status;

#[derive(Debug, PartialEq, Clone)]
pub struct DirstateParents {
    pub p1: [u8; 20],
    pub p2: [u8; 20],
}

/// The C implementation uses all signed types. This will be an issue
/// either when 4GB+ source files are commonplace or in 2038, whichever
/// comes first.
#[derive(Debug, PartialEq, Copy, Clone)]
pub struct DirstateEntry {
    pub state: EntryState,
    pub mode: i32,
    pub mtime: i32,
    pub size: i32,
}

/// A `DirstateEntry` with a size of `-2` means that it was merged from the
/// other parent. This allows revert to pick the right status back during a
/// merge.
pub const SIZE_FROM_OTHER_PARENT: i32 = -2;

#[cfg(not(feature = "dirstate-tree"))]
pub type StateMap = FastHashMap<HgPathBuf, DirstateEntry>;
#[cfg(not(feature = "dirstate-tree"))]
pub type StateMapIter<'a> = hash_map::Iter<'a, HgPathBuf, DirstateEntry>;

#[cfg(feature = "dirstate-tree")]
pub type StateMap = dirstate_tree::tree::Tree;
#[cfg(feature = "dirstate-tree")]
pub type StateMapIter<'a> = dirstate_tree::iter::Iter<'a>;
pub type CopyMap = FastHashMap<HgPathBuf, HgPathBuf>;
pub type CopyMapIter<'a> = hash_map::Iter<'a, HgPathBuf, HgPathBuf>;

#[derive(Copy, Clone, Debug, Eq, PartialEq)]
pub enum EntryState {
    Normal,
    Added,
    Removed,
    Merged,
    Unknown,
}

impl TryFrom<u8> for EntryState {
    type Error = DirstateParseError;

    fn try_from(value: u8) -> Result<Self, Self::Error> {
        match value {
            b'n' => Ok(EntryState::Normal),
            b'a' => Ok(EntryState::Added),
            b'r' => Ok(EntryState::Removed),
            b'm' => Ok(EntryState::Merged),
            b'?' => Ok(EntryState::Unknown),
            _ => Err(DirstateParseError::CorruptedEntry(format!(
                "Incorrect entry state {}",
                value
            ))),
        }
    }
}

impl Into<u8> for EntryState {
    fn into(self) -> u8 {
        match self {
            EntryState::Normal => b'n',
            EntryState::Added => b'a',
            EntryState::Removed => b'r',
            EntryState::Merged => b'm',
            EntryState::Unknown => b'?',
        }
    }
}