manifest.rs
73 lines
| 2.3 KiB
| application/rls-services+xml
|
RustLexer
|
r46104 | 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"); | ||||
|
r46408 | let revlog = Revlog::open(&index_file, None)?; | ||
|
r46104 | 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]) | ||||
}) | ||||
} | ||||
|
r46111 | |||
/// 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]) | ||||
}) | ||||
} | ||||
|
r46104 | } | ||