##// END OF EJS Templates
recover: only apply last journal record per file (issue6423)...
recover: only apply last journal record per file (issue6423) This got broken in 2019 when the size check was introduced. It is most noticable when dealing with transactions that involve an inline to non-inline revlog storage transaction. It wasn't seen as much at the time because the in-memory journal actually de-duplicated the entry implicity, but since 63edc384d3b7 the on-disk journal is used for rollback as well as recover. Differential Revision: https://phab.mercurial-scm.org/D10726

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revlog.rs
71 lines | 2.2 KiB | application/rls-services+xml | RustLexer
// Copyright 2018-2020 Georges Racinet <georges.racinet@octobus.net>
// and Mercurial contributors
//
// This software may be used and distributed according to the terms of the
// GNU General Public License version 2 or any later version.
//! Mercurial concepts for handling revision history
pub mod node;
pub mod nodemap;
mod nodemap_docket;
pub mod path_encode;
pub use node::{FromHexError, Node, NodePrefix};
pub mod changelog;
pub mod index;
pub mod manifest;
pub mod patch;
pub mod revlog;
/// 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 than 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`
#[allow(clippy::unreadable_literal)]
pub const WORKING_DIRECTORY_REVISION: Revision = 0x7fffffff;
pub const WORKING_DIRECTORY_HEX: &str =
"ffffffffffffffffffffffffffffffffffffffff";
/// 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, rev: Revision) -> Result<[Revision; 2], GraphError>;
}
#[derive(Clone, Debug, PartialEq)]
pub enum GraphError {
ParentOutOfRange(Revision),
WorkingDirectoryUnsupported,
}
/// The Mercurial Revlog Index
///
/// This is currently limited to the minimal interface that is needed for
/// the [`nodemap`](nodemap/index.html) module
pub trait RevlogIndex {
/// Total number of Revisions referenced in this index
fn len(&self) -> usize;
fn is_empty(&self) -> bool {
self.len() == 0
}
/// Return a reference to the Node or `None` if rev is out of bounds
///
/// `NULL_REVISION` is not considered to be out of bounds.
fn node(&self, rev: Revision) -> Option<&Node>;
}