Mercurial > hg
view rust/hg-core/src/revlog/manifest.rs @ 46000:c1bb02738f96
registrar: clarify the documentation about some byte strings being required
I *thought* these needed to be byte strings, but didn't remember and had to
search out examples.
Differential Revision: https://phab.mercurial-scm.org/D9489
author | Matt Harbison <matt_harbison@yahoo.com> |
---|---|
date | Sat, 28 Nov 2020 16:59:40 -0500 |
parents | 7252f5237352 |
children | 88e741bf2d93 |
line wrap: on
line source
use crate::revlog::revlog::{Revlog, RevlogError}; use crate::revlog::Revision; use crate::utils::hg_path::HgPath; use std::path::PathBuf; /// A specialized `Revlog` to work with `manifest` data format. pub struct Manifest { /// The generic `revlog` format. revlog: Revlog, } impl Manifest { /// Open the `manifest` of a repository given by its root. pub fn open(root: &PathBuf) -> Result<Self, RevlogError> { let index_file = root.join(".hg/store/00manifest.i"); let revlog = Revlog::open(&index_file, None)?; Ok(Self { revlog }) } /// Return the `ManifestEntry` of a given node id. pub fn get_node(&self, node: &[u8]) -> Result<ManifestEntry, RevlogError> { let rev = self.revlog.get_node_rev(node)?; self.get_rev(rev) } /// Return the `ManifestEntry` of a given node revision. pub fn get_rev( &self, rev: Revision, ) -> Result<ManifestEntry, RevlogError> { let bytes = self.revlog.get_rev_data(rev)?; Ok(ManifestEntry { bytes }) } } /// `Manifest` entry which knows how to interpret the `manifest` data bytes. #[derive(Debug)] pub struct ManifestEntry { bytes: Vec<u8>, } impl ManifestEntry { /// Return an iterator over the lines of the entry. pub fn lines(&self) -> impl Iterator<Item = &[u8]> { self.bytes .split(|b| b == &b'\n') .filter(|line| !line.is_empty()) } /// Return an iterator over the files of the entry. pub fn files(&self) -> impl Iterator<Item = &HgPath> { self.lines().filter(|line| !line.is_empty()).map(|line| { let pos = line .iter() .position(|x| x == &b'\0') .expect("manifest line should contain \\0"); HgPath::new(&line[..pos]) }) } /// Return an iterator over the files of the entry. pub fn files_with_nodes(&self) -> impl Iterator<Item = (&HgPath, &[u8])> { self.lines().filter(|line| !line.is_empty()).map(|line| { let pos = line .iter() .position(|x| x == &b'\0') .expect("manifest line should contain \\0"); let hash_start = pos + 1; let hash_end = hash_start + 40; (HgPath::new(&line[..pos]), &line[hash_start..hash_end]) }) } }