comparison rust/hg-core/src/revlog/changelog.rs @ 46167:8a4914397d02

rust: introduce Repo and Vfs types for filesystem abstraction

This is similar to the corresponding Python classes.

Repo represents a repository and knows the path to the `.hg` directory,
the `store` directory, and the working directory.
Separating these will enable supporting the share extension.

A Vfs is created from a Repo for one of these three directories.
It has filesystem access APIs that take a relative std::path::Path
as a parameter.

Differential Revision: https://phab.mercurial-scm.org/D9596

46166:c511fef30290

use crate::revlog::revlog::{Revlog, RevlogError};
use crate::revlog::NodePrefixRef;
use crate::revlog::Revision;
use std::path::Path;

/// A specialized `Revlog` to work with `changelog` data format.
pub struct Changelog {
    /// The generic `revlog` format.
    revlog: Revlog,
}

impl Changelog {
    /// Open the `changelog` of a repository given by its root.
    pub fn open(root: &Path) -> Result<Self, RevlogError> {
        let index_file = root.join(".hg/store/00changelog.i");
        let revlog = Revlog::open(&index_file, None)?;
        Ok(Self { revlog })
    }

    /// Return the `ChangelogEntry` a given node id.
    pub fn get_node(

46167:8a4914397d02

use crate::repo::Repo;
use crate::revlog::revlog::{Revlog, RevlogError};
use crate::revlog::NodePrefixRef;
use crate::revlog::Revision;

/// A specialized `Revlog` to work with `changelog` data format.
pub struct Changelog {
    /// The generic `revlog` format.
    revlog: Revlog,
}

impl Changelog {
    /// Open the `changelog` of a repository given by its root.
    pub fn open(repo: &Repo) -> Result<Self, RevlogError> {
        let revlog = Revlog::open(repo, "00changelog.i", None)?;
        Ok(Self { revlog })
    }

    /// Return the `ChangelogEntry` a given node id.
    pub fn get_node(