mercurial-scm/hg-stable: rust/hg-core/src/revlog/revlog.rs annotate

annotate rust/hg-core/src/revlog/revlog.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

author	Simon Sapin <simon.sapin@octobus.net>
date	Mon, 14 Dec 2020 16:33:15 +0100
parents	9eb07ab3f2d4
children	0800aa42bb4c

rev	line source
45532 26c53ee51c68 hg-core: Add a limited read only `revlog` implementation Antoine Cezar <antoine.cezar@octobus.net> parents: diff changeset	1 use std::borrow::Cow;
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation Antoine Cezar <antoine.cezar@octobus.net> parents: diff changeset	2 use std::io::Read;
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation Antoine Cezar <antoine.cezar@octobus.net> parents: diff changeset	3 use std::ops::Deref;
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation Antoine Cezar <antoine.cezar@octobus.net> parents: diff changeset	4 use std::path::Path;
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation Antoine Cezar <antoine.cezar@octobus.net> parents: diff changeset	5
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation Antoine Cezar <antoine.cezar@octobus.net> parents: diff changeset	6 use byteorder::{BigEndian, ByteOrder};
45537 b0d6309ff50c hg-core: check data integrity in `Revlog` Antoine Cezar <antoine.cezar@octobus.net> parents: 45532 diff changeset	7 use crypto::digest::Digest;
b0d6309ff50c hg-core: check data integrity in `Revlog` Antoine Cezar <antoine.cezar@octobus.net> parents: 45532 diff changeset	8 use crypto::sha1::Sha1;
45532 26c53ee51c68 hg-core: Add a limited read only `revlog` implementation Antoine Cezar <antoine.cezar@octobus.net> parents: diff changeset	9 use flate2::read::ZlibDecoder;
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation Antoine Cezar <antoine.cezar@octobus.net> parents: diff changeset	10 use micro_timer::timed;
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation Antoine Cezar <antoine.cezar@octobus.net> parents: diff changeset	11 use zstd;
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation Antoine Cezar <antoine.cezar@octobus.net> parents: diff changeset	12
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation Antoine Cezar <antoine.cezar@octobus.net> parents: diff changeset	13 use super::index::Index;
46037 88e741bf2d93 rust: use NodePrefix::from_hex instead of hex::decode directly Simon Sapin <simon-commits@exyr.org> parents: 46036 diff changeset	14 use super::node::{NodePrefixRef, NODE_BYTES_LENGTH, NULL_NODE};
46091 9eb07ab3f2d4 rhg: use persistent nodemap when available Simon Sapin <simon-commits@exyr.org> parents: 46037 diff changeset	15 use super::nodemap;
9eb07ab3f2d4 rhg: use persistent nodemap when available Simon Sapin <simon-commits@exyr.org> parents: 46037 diff changeset	16 use super::nodemap::NodeMap;
9eb07ab3f2d4 rhg: use persistent nodemap when available Simon Sapin <simon-commits@exyr.org> parents: 46037 diff changeset	17 use super::nodemap_docket::NodeMapDocket;
45532 26c53ee51c68 hg-core: Add a limited read only `revlog` implementation Antoine Cezar <antoine.cezar@octobus.net> parents: diff changeset	18 use super::patch;
46167 8a4914397d02 rust: introduce Repo and Vfs types for filesystem abstraction Simon Sapin <simon.sapin@octobus.net> parents: 46091 diff changeset	19 use crate::repo::Repo;
45532 26c53ee51c68 hg-core: Add a limited read only `revlog` implementation Antoine Cezar <antoine.cezar@octobus.net> parents: diff changeset	20 use crate::revlog::Revision;
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation Antoine Cezar <antoine.cezar@octobus.net> parents: diff changeset	21
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation Antoine Cezar <antoine.cezar@octobus.net> parents: diff changeset	22 pub enum RevlogError {
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation Antoine Cezar <antoine.cezar@octobus.net> parents: diff changeset	23 IoError(std::io::Error),
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation Antoine Cezar <antoine.cezar@octobus.net> parents: diff changeset	24 UnsuportedVersion(u16),
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation Antoine Cezar <antoine.cezar@octobus.net> parents: diff changeset	25 InvalidRevision,
46036 8d6164098782 rhg: allow specifying a changeset ID prefix Simon Sapin <simon-commits@exyr.org> parents: 45825 diff changeset	26 /// Found more than one entry whose ID match the requested prefix
8d6164098782 rhg: allow specifying a changeset ID prefix Simon Sapin <simon-commits@exyr.org> parents: 45825 diff changeset	27 AmbiguousPrefix,
45532 26c53ee51c68 hg-core: Add a limited read only `revlog` implementation Antoine Cezar <antoine.cezar@octobus.net> parents: diff changeset	28 Corrupted,
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation Antoine Cezar <antoine.cezar@octobus.net> parents: diff changeset	29 UnknowDataFormat(u8),
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation Antoine Cezar <antoine.cezar@octobus.net> parents: diff changeset	30 }
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation Antoine Cezar <antoine.cezar@octobus.net> parents: diff changeset	31
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation Antoine Cezar <antoine.cezar@octobus.net> parents: diff changeset	32 /// Read only implementation of revlog.
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation Antoine Cezar <antoine.cezar@octobus.net> parents: diff changeset	33 pub struct Revlog {
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation Antoine Cezar <antoine.cezar@octobus.net> parents: diff changeset	34 /// When index and data are not interleaved: bytes of the revlog index.
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation Antoine Cezar <antoine.cezar@octobus.net> parents: diff changeset	35 /// When index and data are interleaved: bytes of the revlog index and
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation Antoine Cezar <antoine.cezar@octobus.net> parents: diff changeset	36 /// data.
45604 900b9b79b99c hg-core: make `Index` owner of its bytes (D8958#inline-14994 followup 1/2) Antoine cezar<acezar@chwitlabs.fr> parents: 45598 diff changeset	37 index: Index,
45532 26c53ee51c68 hg-core: Add a limited read only `revlog` implementation Antoine Cezar <antoine.cezar@octobus.net> parents: diff changeset	38 /// When index and data are not interleaved: bytes of the revlog data
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation Antoine Cezar <antoine.cezar@octobus.net> parents: diff changeset	39 data_bytes: Option<Box<dyn Deref<Target = [u8]> + Send>>,
46091 9eb07ab3f2d4 rhg: use persistent nodemap when available Simon Sapin <simon-commits@exyr.org> parents: 46037 diff changeset	40 /// When present on disk: the persistent nodemap for this revlog
9eb07ab3f2d4 rhg: use persistent nodemap when available Simon Sapin <simon-commits@exyr.org> parents: 46037 diff changeset	41 nodemap: Option<nodemap::NodeTree>,
45532 26c53ee51c68 hg-core: Add a limited read only `revlog` implementation Antoine Cezar <antoine.cezar@octobus.net> parents: diff changeset	42 }
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation Antoine Cezar <antoine.cezar@octobus.net> parents: diff changeset	43
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation Antoine Cezar <antoine.cezar@octobus.net> parents: diff changeset	44 impl Revlog {
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation Antoine Cezar <antoine.cezar@octobus.net> parents: diff changeset	45 /// Open a revlog index file.
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation Antoine Cezar <antoine.cezar@octobus.net> parents: diff changeset	46 ///
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation Antoine Cezar <antoine.cezar@octobus.net> parents: diff changeset	47 /// It will also open the associated data file if index and data are not
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation Antoine Cezar <antoine.cezar@octobus.net> parents: diff changeset	48 /// interleaved.
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation Antoine Cezar <antoine.cezar@octobus.net> parents: diff changeset	49 #[timed]
45825 7252f5237352 hg-core: fix path encoding usage Antoine cezar<acezar@chwitlabs.fr> parents: 45606 diff changeset	50 pub fn open(
46167 8a4914397d02 rust: introduce Repo and Vfs types for filesystem abstraction Simon Sapin <simon.sapin@octobus.net> parents: 46091 diff changeset	51 repo: &Repo,
8a4914397d02 rust: introduce Repo and Vfs types for filesystem abstraction Simon Sapin <simon.sapin@octobus.net> parents: 46091 diff changeset	52 index_path: impl AsRef<Path>,
45825 7252f5237352 hg-core: fix path encoding usage Antoine cezar<acezar@chwitlabs.fr> parents: 45606 diff changeset	53 data_path: Option<&Path>,
7252f5237352 hg-core: fix path encoding usage Antoine cezar<acezar@chwitlabs.fr> parents: 45606 diff changeset	54 ) -> Result<Self, RevlogError> {
46167 8a4914397d02 rust: introduce Repo and Vfs types for filesystem abstraction Simon Sapin <simon.sapin@octobus.net> parents: 46091 diff changeset	55 let index_path = index_path.as_ref();
8a4914397d02 rust: introduce Repo and Vfs types for filesystem abstraction Simon Sapin <simon.sapin@octobus.net> parents: 46091 diff changeset	56 let index_mmap = repo
8a4914397d02 rust: introduce Repo and Vfs types for filesystem abstraction Simon Sapin <simon.sapin@octobus.net> parents: 46091 diff changeset	57 .store_vfs()
8a4914397d02 rust: introduce Repo and Vfs types for filesystem abstraction Simon Sapin <simon.sapin@octobus.net> parents: 46091 diff changeset	58 .mmap_open(&index_path)
8a4914397d02 rust: introduce Repo and Vfs types for filesystem abstraction Simon Sapin <simon.sapin@octobus.net> parents: 46091 diff changeset	59 .map_err(RevlogError::IoError)?;
45532 26c53ee51c68 hg-core: Add a limited read only `revlog` implementation Antoine Cezar <antoine.cezar@octobus.net> parents: diff changeset	60
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation Antoine Cezar <antoine.cezar@octobus.net> parents: diff changeset	61 let version = get_version(&index_mmap);
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation Antoine Cezar <antoine.cezar@octobus.net> parents: diff changeset	62 if version != 1 {
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation Antoine Cezar <antoine.cezar@octobus.net> parents: diff changeset	63 return Err(RevlogError::UnsuportedVersion(version));
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation Antoine Cezar <antoine.cezar@octobus.net> parents: diff changeset	64 }
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation Antoine Cezar <antoine.cezar@octobus.net> parents: diff changeset	65
45605 1cef583541c0 hg-core: return Err if `offset != bytes.len()` Antoine cezar<acezar@chwitlabs.fr> parents: 45604 diff changeset	66 let index = Index::new(Box::new(index_mmap))?;
45532 26c53ee51c68 hg-core: Add a limited read only `revlog` implementation Antoine Cezar <antoine.cezar@octobus.net> parents: diff changeset	67
45825 7252f5237352 hg-core: fix path encoding usage Antoine cezar<acezar@chwitlabs.fr> parents: 45606 diff changeset	68 let default_data_path = index_path.with_extension("d");
7252f5237352 hg-core: fix path encoding usage Antoine cezar<acezar@chwitlabs.fr> parents: 45606 diff changeset	69
45532 26c53ee51c68 hg-core: Add a limited read only `revlog` implementation Antoine Cezar <antoine.cezar@octobus.net> parents: diff changeset	70 // type annotation required
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation Antoine Cezar <antoine.cezar@octobus.net> parents: diff changeset	71 // won't recognize Mmap as Deref<Target = [u8]>
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation Antoine Cezar <antoine.cezar@octobus.net> parents: diff changeset	72 let data_bytes: Option<Box<dyn Deref<Target = [u8]> + Send>> =
45604 900b9b79b99c hg-core: make `Index` owner of its bytes (D8958#inline-14994 followup 1/2) Antoine cezar<acezar@chwitlabs.fr> parents: 45598 diff changeset	73 if index.is_inline() {
45532 26c53ee51c68 hg-core: Add a limited read only `revlog` implementation Antoine Cezar <antoine.cezar@octobus.net> parents: diff changeset	74 None
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation Antoine Cezar <antoine.cezar@octobus.net> parents: diff changeset	75 } else {
45825 7252f5237352 hg-core: fix path encoding usage Antoine cezar<acezar@chwitlabs.fr> parents: 45606 diff changeset	76 let data_path = data_path.unwrap_or(&default_data_path);
46167 8a4914397d02 rust: introduce Repo and Vfs types for filesystem abstraction Simon Sapin <simon.sapin@octobus.net> parents: 46091 diff changeset	77 let data_mmap = repo
8a4914397d02 rust: introduce Repo and Vfs types for filesystem abstraction Simon Sapin <simon.sapin@octobus.net> parents: 46091 diff changeset	78 .store_vfs()
8a4914397d02 rust: introduce Repo and Vfs types for filesystem abstraction Simon Sapin <simon.sapin@octobus.net> parents: 46091 diff changeset	79 .mmap_open(data_path)
8a4914397d02 rust: introduce Repo and Vfs types for filesystem abstraction Simon Sapin <simon.sapin@octobus.net> parents: 46091 diff changeset	80 .map_err(RevlogError::IoError)?;
45532 26c53ee51c68 hg-core: Add a limited read only `revlog` implementation Antoine Cezar <antoine.cezar@octobus.net> parents: diff changeset	81 Some(Box::new(data_mmap))
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation Antoine Cezar <antoine.cezar@octobus.net> parents: diff changeset	82 };
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation Antoine Cezar <antoine.cezar@octobus.net> parents: diff changeset	83
46167 8a4914397d02 rust: introduce Repo and Vfs types for filesystem abstraction Simon Sapin <simon.sapin@octobus.net> parents: 46091 diff changeset	84 let nodemap = NodeMapDocket::read_from_file(repo, index_path)?.map(
46091 9eb07ab3f2d4 rhg: use persistent nodemap when available Simon Sapin <simon-commits@exyr.org> parents: 46037 diff changeset	85 \|(docket, data)\| {
9eb07ab3f2d4 rhg: use persistent nodemap when available Simon Sapin <simon-commits@exyr.org> parents: 46037 diff changeset	86 nodemap::NodeTree::load_bytes(
9eb07ab3f2d4 rhg: use persistent nodemap when available Simon Sapin <simon-commits@exyr.org> parents: 46037 diff changeset	87 Box::new(data),
9eb07ab3f2d4 rhg: use persistent nodemap when available Simon Sapin <simon-commits@exyr.org> parents: 46037 diff changeset	88 docket.data_length,
9eb07ab3f2d4 rhg: use persistent nodemap when available Simon Sapin <simon-commits@exyr.org> parents: 46037 diff changeset	89 )
9eb07ab3f2d4 rhg: use persistent nodemap when available Simon Sapin <simon-commits@exyr.org> parents: 46037 diff changeset	90 },
9eb07ab3f2d4 rhg: use persistent nodemap when available Simon Sapin <simon-commits@exyr.org> parents: 46037 diff changeset	91 );
9eb07ab3f2d4 rhg: use persistent nodemap when available Simon Sapin <simon-commits@exyr.org> parents: 46037 diff changeset	92
9eb07ab3f2d4 rhg: use persistent nodemap when available Simon Sapin <simon-commits@exyr.org> parents: 46037 diff changeset	93 Ok(Revlog {
9eb07ab3f2d4 rhg: use persistent nodemap when available Simon Sapin <simon-commits@exyr.org> parents: 46037 diff changeset	94 index,
9eb07ab3f2d4 rhg: use persistent nodemap when available Simon Sapin <simon-commits@exyr.org> parents: 46037 diff changeset	95 data_bytes,
9eb07ab3f2d4 rhg: use persistent nodemap when available Simon Sapin <simon-commits@exyr.org> parents: 46037 diff changeset	96 nodemap,
9eb07ab3f2d4 rhg: use persistent nodemap when available Simon Sapin <simon-commits@exyr.org> parents: 46037 diff changeset	97 })
45532 26c53ee51c68 hg-core: Add a limited read only `revlog` implementation Antoine Cezar <antoine.cezar@octobus.net> parents: diff changeset	98 }
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation Antoine Cezar <antoine.cezar@octobus.net> parents: diff changeset	99
45540 4f11a67a12fb hg-core: add `Revlog.get_node_rev` Antoine Cezar <antoine.cezar@octobus.net> parents: 45537 diff changeset	100 /// Return number of entries of the `Revlog`.
4f11a67a12fb hg-core: add `Revlog.get_node_rev` Antoine Cezar <antoine.cezar@octobus.net> parents: 45537 diff changeset	101 pub fn len(&self) -> usize {
45604 900b9b79b99c hg-core: make `Index` owner of its bytes (D8958#inline-14994 followup 1/2) Antoine cezar<acezar@chwitlabs.fr> parents: 45598 diff changeset	102 self.index.len()
45540 4f11a67a12fb hg-core: add `Revlog.get_node_rev` Antoine Cezar <antoine.cezar@octobus.net> parents: 45537 diff changeset	103 }
4f11a67a12fb hg-core: add `Revlog.get_node_rev` Antoine Cezar <antoine.cezar@octobus.net> parents: 45537 diff changeset	104
4f11a67a12fb hg-core: add `Revlog.get_node_rev` Antoine Cezar <antoine.cezar@octobus.net> parents: 45537 diff changeset	105 /// Returns `true` if the `Revlog` has zero `entries`.
4f11a67a12fb hg-core: add `Revlog.get_node_rev` Antoine Cezar <antoine.cezar@octobus.net> parents: 45537 diff changeset	106 pub fn is_empty(&self) -> bool {
45604 900b9b79b99c hg-core: make `Index` owner of its bytes (D8958#inline-14994 followup 1/2) Antoine cezar<acezar@chwitlabs.fr> parents: 45598 diff changeset	107 self.index.is_empty()
45540 4f11a67a12fb hg-core: add `Revlog.get_node_rev` Antoine Cezar <antoine.cezar@octobus.net> parents: 45537 diff changeset	108 }
4f11a67a12fb hg-core: add `Revlog.get_node_rev` Antoine Cezar <antoine.cezar@octobus.net> parents: 45537 diff changeset	109
4f11a67a12fb hg-core: add `Revlog.get_node_rev` Antoine Cezar <antoine.cezar@octobus.net> parents: 45537 diff changeset	110 /// Return the full data associated to a node.
4f11a67a12fb hg-core: add `Revlog.get_node_rev` Antoine Cezar <antoine.cezar@octobus.net> parents: 45537 diff changeset	111 #[timed]
46037 88e741bf2d93 rust: use NodePrefix::from_hex instead of hex::decode directly Simon Sapin <simon-commits@exyr.org> parents: 46036 diff changeset	112 pub fn get_node_rev(
88e741bf2d93 rust: use NodePrefix::from_hex instead of hex::decode directly Simon Sapin <simon-commits@exyr.org> parents: 46036 diff changeset	113 &self,
88e741bf2d93 rust: use NodePrefix::from_hex instead of hex::decode directly Simon Sapin <simon-commits@exyr.org> parents: 46036 diff changeset	114 node: NodePrefixRef,
88e741bf2d93 rust: use NodePrefix::from_hex instead of hex::decode directly Simon Sapin <simon-commits@exyr.org> parents: 46036 diff changeset	115 ) -> Result<Revision, RevlogError> {
46091 9eb07ab3f2d4 rhg: use persistent nodemap when available Simon Sapin <simon-commits@exyr.org> parents: 46037 diff changeset	116 if let Some(nodemap) = &self.nodemap {
9eb07ab3f2d4 rhg: use persistent nodemap when available Simon Sapin <simon-commits@exyr.org> parents: 46037 diff changeset	117 return nodemap
9eb07ab3f2d4 rhg: use persistent nodemap when available Simon Sapin <simon-commits@exyr.org> parents: 46037 diff changeset	118 .find_bin(&self.index, node)
9eb07ab3f2d4 rhg: use persistent nodemap when available Simon Sapin <simon-commits@exyr.org> parents: 46037 diff changeset	119 // TODO: propagate details of this error:
9eb07ab3f2d4 rhg: use persistent nodemap when available Simon Sapin <simon-commits@exyr.org> parents: 46037 diff changeset	120 .map_err(\|_\| RevlogError::Corrupted)?
9eb07ab3f2d4 rhg: use persistent nodemap when available Simon Sapin <simon-commits@exyr.org> parents: 46037 diff changeset	121 .ok_or(RevlogError::InvalidRevision);
9eb07ab3f2d4 rhg: use persistent nodemap when available Simon Sapin <simon-commits@exyr.org> parents: 46037 diff changeset	122 }
9eb07ab3f2d4 rhg: use persistent nodemap when available Simon Sapin <simon-commits@exyr.org> parents: 46037 diff changeset	123
9eb07ab3f2d4 rhg: use persistent nodemap when available Simon Sapin <simon-commits@exyr.org> parents: 46037 diff changeset	124 // Fallback to linear scan when a persistent nodemap is not present.
9eb07ab3f2d4 rhg: use persistent nodemap when available Simon Sapin <simon-commits@exyr.org> parents: 46037 diff changeset	125 // This happens when the persistent-nodemap experimental feature is not
9eb07ab3f2d4 rhg: use persistent nodemap when available Simon Sapin <simon-commits@exyr.org> parents: 46037 diff changeset	126 // enabled, or for small revlogs.
9eb07ab3f2d4 rhg: use persistent nodemap when available Simon Sapin <simon-commits@exyr.org> parents: 46037 diff changeset	127 //
9eb07ab3f2d4 rhg: use persistent nodemap when available Simon Sapin <simon-commits@exyr.org> parents: 46037 diff changeset	128 // TODO: consider building a non-persistent nodemap in memory to
9eb07ab3f2d4 rhg: use persistent nodemap when available Simon Sapin <simon-commits@exyr.org> parents: 46037 diff changeset	129 // optimize these cases.
46036 8d6164098782 rhg: allow specifying a changeset ID prefix Simon Sapin <simon-commits@exyr.org> parents: 45825 diff changeset	130 let mut found_by_prefix = None;
45540 4f11a67a12fb hg-core: add `Revlog.get_node_rev` Antoine Cezar <antoine.cezar@octobus.net> parents: 45537 diff changeset	131 for rev in (0..self.len() as Revision).rev() {
4f11a67a12fb hg-core: add `Revlog.get_node_rev` Antoine Cezar <antoine.cezar@octobus.net> parents: 45537 diff changeset	132 let index_entry =
45604 900b9b79b99c hg-core: make `Index` owner of its bytes (D8958#inline-14994 followup 1/2) Antoine cezar<acezar@chwitlabs.fr> parents: 45598 diff changeset	133 self.index.get_entry(rev).ok_or(RevlogError::Corrupted)?;
46037 88e741bf2d93 rust: use NodePrefix::from_hex instead of hex::decode directly Simon Sapin <simon-commits@exyr.org> parents: 46036 diff changeset	134 if node == *index_entry.hash() {
45540 4f11a67a12fb hg-core: add `Revlog.get_node_rev` Antoine Cezar <antoine.cezar@octobus.net> parents: 45537 diff changeset	135 return Ok(rev);
4f11a67a12fb hg-core: add `Revlog.get_node_rev` Antoine Cezar <antoine.cezar@octobus.net> parents: 45537 diff changeset	136 }
46037 88e741bf2d93 rust: use NodePrefix::from_hex instead of hex::decode directly Simon Sapin <simon-commits@exyr.org> parents: 46036 diff changeset	137 if node.is_prefix_of(index_entry.hash()) {
46036 8d6164098782 rhg: allow specifying a changeset ID prefix Simon Sapin <simon-commits@exyr.org> parents: 45825 diff changeset	138 if found_by_prefix.is_some() {
8d6164098782 rhg: allow specifying a changeset ID prefix Simon Sapin <simon-commits@exyr.org> parents: 45825 diff changeset	139 return Err(RevlogError::AmbiguousPrefix);
8d6164098782 rhg: allow specifying a changeset ID prefix Simon Sapin <simon-commits@exyr.org> parents: 45825 diff changeset	140 }
8d6164098782 rhg: allow specifying a changeset ID prefix Simon Sapin <simon-commits@exyr.org> parents: 45825 diff changeset	141 found_by_prefix = Some(rev)
8d6164098782 rhg: allow specifying a changeset ID prefix Simon Sapin <simon-commits@exyr.org> parents: 45825 diff changeset	142 }
45540 4f11a67a12fb hg-core: add `Revlog.get_node_rev` Antoine Cezar <antoine.cezar@octobus.net> parents: 45537 diff changeset	143 }
46036 8d6164098782 rhg: allow specifying a changeset ID prefix Simon Sapin <simon-commits@exyr.org> parents: 45825 diff changeset	144 found_by_prefix.ok_or(RevlogError::InvalidRevision)
45540 4f11a67a12fb hg-core: add `Revlog.get_node_rev` Antoine Cezar <antoine.cezar@octobus.net> parents: 45537 diff changeset	145 }
4f11a67a12fb hg-core: add `Revlog.get_node_rev` Antoine Cezar <antoine.cezar@octobus.net> parents: 45537 diff changeset	146
45532 26c53ee51c68 hg-core: Add a limited read only `revlog` implementation Antoine Cezar <antoine.cezar@octobus.net> parents: diff changeset	147 /// Return the full data associated to a revision.
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation Antoine Cezar <antoine.cezar@octobus.net> parents: diff changeset	148 ///
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation Antoine Cezar <antoine.cezar@octobus.net> parents: diff changeset	149 /// All entries required to build the final data out of deltas will be
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation Antoine Cezar <antoine.cezar@octobus.net> parents: diff changeset	150 /// retrieved as needed, and the deltas will be applied to the inital
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation Antoine Cezar <antoine.cezar@octobus.net> parents: diff changeset	151 /// snapshot to rebuild the final data.
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation Antoine Cezar <antoine.cezar@octobus.net> parents: diff changeset	152 #[timed]
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation Antoine Cezar <antoine.cezar@octobus.net> parents: diff changeset	153 pub fn get_rev_data(&self, rev: Revision) -> Result<Vec<u8>, RevlogError> {
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation Antoine Cezar <antoine.cezar@octobus.net> parents: diff changeset	154 // Todo return -> Cow
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation Antoine Cezar <antoine.cezar@octobus.net> parents: diff changeset	155 let mut entry = self.get_entry(rev)?;
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation Antoine Cezar <antoine.cezar@octobus.net> parents: diff changeset	156 let mut delta_chain = vec![];
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation Antoine Cezar <antoine.cezar@octobus.net> parents: diff changeset	157 while let Some(base_rev) = entry.base_rev {
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation Antoine Cezar <antoine.cezar@octobus.net> parents: diff changeset	158 delta_chain.push(entry);
45606 be951ca95b08 hg-core: use `.or(Err(Error))` not `.map_err(\|_\| Error)` (D9100#inline-15067) Antoine cezar<acezar@chwitlabs.fr> parents: 45605 diff changeset	159 entry =
be951ca95b08 hg-core: use `.or(Err(Error))` not `.map_err(\|_\| Error)` (D9100#inline-15067) Antoine cezar<acezar@chwitlabs.fr> parents: 45605 diff changeset	160 self.get_entry(base_rev).or(Err(RevlogError::Corrupted))?;
45532 26c53ee51c68 hg-core: Add a limited read only `revlog` implementation Antoine Cezar <antoine.cezar@octobus.net> parents: diff changeset	161 }
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation Antoine Cezar <antoine.cezar@octobus.net> parents: diff changeset	162
45537 b0d6309ff50c hg-core: check data integrity in `Revlog` Antoine Cezar <antoine.cezar@octobus.net> parents: 45532 diff changeset	163 // TODO do not look twice in the index
45604 900b9b79b99c hg-core: make `Index` owner of its bytes (D8958#inline-14994 followup 1/2) Antoine cezar<acezar@chwitlabs.fr> parents: 45598 diff changeset	164 let index_entry = self
900b9b79b99c hg-core: make `Index` owner of its bytes (D8958#inline-14994 followup 1/2) Antoine cezar<acezar@chwitlabs.fr> parents: 45598 diff changeset	165 .index
900b9b79b99c hg-core: make `Index` owner of its bytes (D8958#inline-14994 followup 1/2) Antoine cezar<acezar@chwitlabs.fr> parents: 45598 diff changeset	166 .get_entry(rev)
900b9b79b99c hg-core: make `Index` owner of its bytes (D8958#inline-14994 followup 1/2) Antoine cezar<acezar@chwitlabs.fr> parents: 45598 diff changeset	167 .ok_or(RevlogError::InvalidRevision)?;
45537 b0d6309ff50c hg-core: check data integrity in `Revlog` Antoine Cezar <antoine.cezar@octobus.net> parents: 45532 diff changeset	168
b0d6309ff50c hg-core: check data integrity in `Revlog` Antoine Cezar <antoine.cezar@octobus.net> parents: 45532 diff changeset	169 let data: Vec<u8> = if delta_chain.is_empty() {
b0d6309ff50c hg-core: check data integrity in `Revlog` Antoine Cezar <antoine.cezar@octobus.net> parents: 45532 diff changeset	170 entry.data()?.into()
b0d6309ff50c hg-core: check data integrity in `Revlog` Antoine Cezar <antoine.cezar@octobus.net> parents: 45532 diff changeset	171 } else {
b0d6309ff50c hg-core: check data integrity in `Revlog` Antoine Cezar <antoine.cezar@octobus.net> parents: 45532 diff changeset	172 Revlog::build_data_from_deltas(entry, &delta_chain)?
b0d6309ff50c hg-core: check data integrity in `Revlog` Antoine Cezar <antoine.cezar@octobus.net> parents: 45532 diff changeset	173 };
b0d6309ff50c hg-core: check data integrity in `Revlog` Antoine Cezar <antoine.cezar@octobus.net> parents: 45532 diff changeset	174
b0d6309ff50c hg-core: check data integrity in `Revlog` Antoine Cezar <antoine.cezar@octobus.net> parents: 45532 diff changeset	175 if self.check_hash(
b0d6309ff50c hg-core: check data integrity in `Revlog` Antoine Cezar <antoine.cezar@octobus.net> parents: 45532 diff changeset	176 index_entry.p1(),
b0d6309ff50c hg-core: check data integrity in `Revlog` Antoine Cezar <antoine.cezar@octobus.net> parents: 45532 diff changeset	177 index_entry.p2(),
46037 88e741bf2d93 rust: use NodePrefix::from_hex instead of hex::decode directly Simon Sapin <simon-commits@exyr.org> parents: 46036 diff changeset	178 index_entry.hash().as_bytes(),
45537 b0d6309ff50c hg-core: check data integrity in `Revlog` Antoine Cezar <antoine.cezar@octobus.net> parents: 45532 diff changeset	179 &data,
b0d6309ff50c hg-core: check data integrity in `Revlog` Antoine Cezar <antoine.cezar@octobus.net> parents: 45532 diff changeset	180 ) {
b0d6309ff50c hg-core: check data integrity in `Revlog` Antoine Cezar <antoine.cezar@octobus.net> parents: 45532 diff changeset	181 Ok(data)
45532 26c53ee51c68 hg-core: Add a limited read only `revlog` implementation Antoine Cezar <antoine.cezar@octobus.net> parents: diff changeset	182 } else {
45537 b0d6309ff50c hg-core: check data integrity in `Revlog` Antoine Cezar <antoine.cezar@octobus.net> parents: 45532 diff changeset	183 Err(RevlogError::Corrupted)
45532 26c53ee51c68 hg-core: Add a limited read only `revlog` implementation Antoine Cezar <antoine.cezar@octobus.net> parents: diff changeset	184 }
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation Antoine Cezar <antoine.cezar@octobus.net> parents: diff changeset	185 }
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation Antoine Cezar <antoine.cezar@octobus.net> parents: diff changeset	186
45537 b0d6309ff50c hg-core: check data integrity in `Revlog` Antoine Cezar <antoine.cezar@octobus.net> parents: 45532 diff changeset	187 /// Check the hash of some given data against the recorded hash.
b0d6309ff50c hg-core: check data integrity in `Revlog` Antoine Cezar <antoine.cezar@octobus.net> parents: 45532 diff changeset	188 pub fn check_hash(
b0d6309ff50c hg-core: check data integrity in `Revlog` Antoine Cezar <antoine.cezar@octobus.net> parents: 45532 diff changeset	189 &self,
b0d6309ff50c hg-core: check data integrity in `Revlog` Antoine Cezar <antoine.cezar@octobus.net> parents: 45532 diff changeset	190 p1: Revision,
b0d6309ff50c hg-core: check data integrity in `Revlog` Antoine Cezar <antoine.cezar@octobus.net> parents: 45532 diff changeset	191 p2: Revision,
b0d6309ff50c hg-core: check data integrity in `Revlog` Antoine Cezar <antoine.cezar@octobus.net> parents: 45532 diff changeset	192 expected: &[u8],
b0d6309ff50c hg-core: check data integrity in `Revlog` Antoine Cezar <antoine.cezar@octobus.net> parents: 45532 diff changeset	193 data: &[u8],
b0d6309ff50c hg-core: check data integrity in `Revlog` Antoine Cezar <antoine.cezar@octobus.net> parents: 45532 diff changeset	194 ) -> bool {
45604 900b9b79b99c hg-core: make `Index` owner of its bytes (D8958#inline-14994 followup 1/2) Antoine cezar<acezar@chwitlabs.fr> parents: 45598 diff changeset	195 let e1 = self.index.get_entry(p1);
45537 b0d6309ff50c hg-core: check data integrity in `Revlog` Antoine Cezar <antoine.cezar@octobus.net> parents: 45532 diff changeset	196 let h1 = match e1 {
b0d6309ff50c hg-core: check data integrity in `Revlog` Antoine Cezar <antoine.cezar@octobus.net> parents: 45532 diff changeset	197 Some(ref entry) => entry.hash(),
46037 88e741bf2d93 rust: use NodePrefix::from_hex instead of hex::decode directly Simon Sapin <simon-commits@exyr.org> parents: 46036 diff changeset	198 None => &NULL_NODE,
45537 b0d6309ff50c hg-core: check data integrity in `Revlog` Antoine Cezar <antoine.cezar@octobus.net> parents: 45532 diff changeset	199 };
45604 900b9b79b99c hg-core: make `Index` owner of its bytes (D8958#inline-14994 followup 1/2) Antoine cezar<acezar@chwitlabs.fr> parents: 45598 diff changeset	200 let e2 = self.index.get_entry(p2);
45537 b0d6309ff50c hg-core: check data integrity in `Revlog` Antoine Cezar <antoine.cezar@octobus.net> parents: 45532 diff changeset	201 let h2 = match e2 {
b0d6309ff50c hg-core: check data integrity in `Revlog` Antoine Cezar <antoine.cezar@octobus.net> parents: 45532 diff changeset	202 Some(ref entry) => entry.hash(),
46037 88e741bf2d93 rust: use NodePrefix::from_hex instead of hex::decode directly Simon Sapin <simon-commits@exyr.org> parents: 46036 diff changeset	203 None => &NULL_NODE,
45537 b0d6309ff50c hg-core: check data integrity in `Revlog` Antoine Cezar <antoine.cezar@octobus.net> parents: 45532 diff changeset	204 };
b0d6309ff50c hg-core: check data integrity in `Revlog` Antoine Cezar <antoine.cezar@octobus.net> parents: 45532 diff changeset	205
46037 88e741bf2d93 rust: use NodePrefix::from_hex instead of hex::decode directly Simon Sapin <simon-commits@exyr.org> parents: 46036 diff changeset	206 hash(data, h1.as_bytes(), h2.as_bytes()).as_slice() == expected
45537 b0d6309ff50c hg-core: check data integrity in `Revlog` Antoine Cezar <antoine.cezar@octobus.net> parents: 45532 diff changeset	207 }
b0d6309ff50c hg-core: check data integrity in `Revlog` Antoine Cezar <antoine.cezar@octobus.net> parents: 45532 diff changeset	208
45532 26c53ee51c68 hg-core: Add a limited read only `revlog` implementation Antoine Cezar <antoine.cezar@octobus.net> parents: diff changeset	209 /// Build the full data of a revision out its snapshot
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation Antoine Cezar <antoine.cezar@octobus.net> parents: diff changeset	210 /// and its deltas.
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation Antoine Cezar <antoine.cezar@octobus.net> parents: diff changeset	211 #[timed]
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation Antoine Cezar <antoine.cezar@octobus.net> parents: diff changeset	212 fn build_data_from_deltas(
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation Antoine Cezar <antoine.cezar@octobus.net> parents: diff changeset	213 snapshot: RevlogEntry,
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation Antoine Cezar <antoine.cezar@octobus.net> parents: diff changeset	214 deltas: &[RevlogEntry],
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation Antoine Cezar <antoine.cezar@octobus.net> parents: diff changeset	215 ) -> Result<Vec<u8>, RevlogError> {
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation Antoine Cezar <antoine.cezar@octobus.net> parents: diff changeset	216 let snapshot = snapshot.data()?;
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation Antoine Cezar <antoine.cezar@octobus.net> parents: diff changeset	217 let deltas = deltas
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation Antoine Cezar <antoine.cezar@octobus.net> parents: diff changeset	218 .iter()
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation Antoine Cezar <antoine.cezar@octobus.net> parents: diff changeset	219 .rev()
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation Antoine Cezar <antoine.cezar@octobus.net> parents: diff changeset	220 .map(RevlogEntry::data)
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation Antoine Cezar <antoine.cezar@octobus.net> parents: diff changeset	221 .collect::<Result<Vec<Cow<'_, [u8]>>, RevlogError>>()?;
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation Antoine Cezar <antoine.cezar@octobus.net> parents: diff changeset	222 let patches: Vec<_> =
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation Antoine Cezar <antoine.cezar@octobus.net> parents: diff changeset	223 deltas.iter().map(\|d\| patch::PatchList::new(d)).collect();
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation Antoine Cezar <antoine.cezar@octobus.net> parents: diff changeset	224 let patch = patch::fold_patch_lists(&patches);
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation Antoine Cezar <antoine.cezar@octobus.net> parents: diff changeset	225 Ok(patch.apply(&snapshot))
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation Antoine Cezar <antoine.cezar@octobus.net> parents: diff changeset	226 }
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation Antoine Cezar <antoine.cezar@octobus.net> parents: diff changeset	227
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation Antoine Cezar <antoine.cezar@octobus.net> parents: diff changeset	228 /// Return the revlog data.
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation Antoine Cezar <antoine.cezar@octobus.net> parents: diff changeset	229 fn data(&self) -> &[u8] {
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation Antoine Cezar <antoine.cezar@octobus.net> parents: diff changeset	230 match self.data_bytes {
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation Antoine Cezar <antoine.cezar@octobus.net> parents: diff changeset	231 Some(ref data_bytes) => &data_bytes,
45604 900b9b79b99c hg-core: make `Index` owner of its bytes (D8958#inline-14994 followup 1/2) Antoine cezar<acezar@chwitlabs.fr> parents: 45598 diff changeset	232 None => panic!(
900b9b79b99c hg-core: make `Index` owner of its bytes (D8958#inline-14994 followup 1/2) Antoine cezar<acezar@chwitlabs.fr> parents: 45598 diff changeset	233 "forgot to load the data or trying to access inline data"
900b9b79b99c hg-core: make `Index` owner of its bytes (D8958#inline-14994 followup 1/2) Antoine cezar<acezar@chwitlabs.fr> parents: 45598 diff changeset	234 ),
45532 26c53ee51c68 hg-core: Add a limited read only `revlog` implementation Antoine Cezar <antoine.cezar@octobus.net> parents: diff changeset	235 }
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation Antoine Cezar <antoine.cezar@octobus.net> parents: diff changeset	236 }
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation Antoine Cezar <antoine.cezar@octobus.net> parents: diff changeset	237
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation Antoine Cezar <antoine.cezar@octobus.net> parents: diff changeset	238 /// Get an entry of the revlog.
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation Antoine Cezar <antoine.cezar@octobus.net> parents: diff changeset	239 fn get_entry(&self, rev: Revision) -> Result<RevlogEntry, RevlogError> {
45604 900b9b79b99c hg-core: make `Index` owner of its bytes (D8958#inline-14994 followup 1/2) Antoine cezar<acezar@chwitlabs.fr> parents: 45598 diff changeset	240 let index_entry = self
900b9b79b99c hg-core: make `Index` owner of its bytes (D8958#inline-14994 followup 1/2) Antoine cezar<acezar@chwitlabs.fr> parents: 45598 diff changeset	241 .index
900b9b79b99c hg-core: make `Index` owner of its bytes (D8958#inline-14994 followup 1/2) Antoine cezar<acezar@chwitlabs.fr> parents: 45598 diff changeset	242 .get_entry(rev)
900b9b79b99c hg-core: make `Index` owner of its bytes (D8958#inline-14994 followup 1/2) Antoine cezar<acezar@chwitlabs.fr> parents: 45598 diff changeset	243 .ok_or(RevlogError::InvalidRevision)?;
45532 26c53ee51c68 hg-core: Add a limited read only `revlog` implementation Antoine Cezar <antoine.cezar@octobus.net> parents: diff changeset	244 let start = index_entry.offset();
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation Antoine Cezar <antoine.cezar@octobus.net> parents: diff changeset	245 let end = start + index_entry.compressed_len();
45604 900b9b79b99c hg-core: make `Index` owner of its bytes (D8958#inline-14994 followup 1/2) Antoine cezar<acezar@chwitlabs.fr> parents: 45598 diff changeset	246 let data = if self.index.is_inline() {
900b9b79b99c hg-core: make `Index` owner of its bytes (D8958#inline-14994 followup 1/2) Antoine cezar<acezar@chwitlabs.fr> parents: 45598 diff changeset	247 self.index.data(start, end)
900b9b79b99c hg-core: make `Index` owner of its bytes (D8958#inline-14994 followup 1/2) Antoine cezar<acezar@chwitlabs.fr> parents: 45598 diff changeset	248 } else {
900b9b79b99c hg-core: make `Index` owner of its bytes (D8958#inline-14994 followup 1/2) Antoine cezar<acezar@chwitlabs.fr> parents: 45598 diff changeset	249 &self.data()[start..end]
900b9b79b99c hg-core: make `Index` owner of its bytes (D8958#inline-14994 followup 1/2) Antoine cezar<acezar@chwitlabs.fr> parents: 45598 diff changeset	250 };
45532 26c53ee51c68 hg-core: Add a limited read only `revlog` implementation Antoine Cezar <antoine.cezar@octobus.net> parents: diff changeset	251 let entry = RevlogEntry {
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation Antoine Cezar <antoine.cezar@octobus.net> parents: diff changeset	252 rev,
45604 900b9b79b99c hg-core: make `Index` owner of its bytes (D8958#inline-14994 followup 1/2) Antoine cezar<acezar@chwitlabs.fr> parents: 45598 diff changeset	253 bytes: data,
45532 26c53ee51c68 hg-core: Add a limited read only `revlog` implementation Antoine Cezar <antoine.cezar@octobus.net> parents: diff changeset	254 compressed_len: index_entry.compressed_len(),
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation Antoine Cezar <antoine.cezar@octobus.net> parents: diff changeset	255 uncompressed_len: index_entry.uncompressed_len(),
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation Antoine Cezar <antoine.cezar@octobus.net> parents: diff changeset	256 base_rev: if index_entry.base_revision() == rev {
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation Antoine Cezar <antoine.cezar@octobus.net> parents: diff changeset	257 None
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation Antoine Cezar <antoine.cezar@octobus.net> parents: diff changeset	258 } else {
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation Antoine Cezar <antoine.cezar@octobus.net> parents: diff changeset	259 Some(index_entry.base_revision())
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation Antoine Cezar <antoine.cezar@octobus.net> parents: diff changeset	260 },
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation Antoine Cezar <antoine.cezar@octobus.net> parents: diff changeset	261 };
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation Antoine Cezar <antoine.cezar@octobus.net> parents: diff changeset	262 Ok(entry)
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation Antoine Cezar <antoine.cezar@octobus.net> parents: diff changeset	263 }
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation Antoine Cezar <antoine.cezar@octobus.net> parents: diff changeset	264 }
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation Antoine Cezar <antoine.cezar@octobus.net> parents: diff changeset	265
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation Antoine Cezar <antoine.cezar@octobus.net> parents: diff changeset	266 /// The revlog entry's bytes and the necessary informations to extract
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation Antoine Cezar <antoine.cezar@octobus.net> parents: diff changeset	267 /// the entry's data.
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation Antoine Cezar <antoine.cezar@octobus.net> parents: diff changeset	268 #[derive(Debug)]
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation Antoine Cezar <antoine.cezar@octobus.net> parents: diff changeset	269 pub struct RevlogEntry<'a> {
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation Antoine Cezar <antoine.cezar@octobus.net> parents: diff changeset	270 rev: Revision,
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation Antoine Cezar <antoine.cezar@octobus.net> parents: diff changeset	271 bytes: &'a [u8],
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation Antoine Cezar <antoine.cezar@octobus.net> parents: diff changeset	272 compressed_len: usize,
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation Antoine Cezar <antoine.cezar@octobus.net> parents: diff changeset	273 uncompressed_len: usize,
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation Antoine Cezar <antoine.cezar@octobus.net> parents: diff changeset	274 base_rev: Option<Revision>,
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation Antoine Cezar <antoine.cezar@octobus.net> parents: diff changeset	275 }
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation Antoine Cezar <antoine.cezar@octobus.net> parents: diff changeset	276
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation Antoine Cezar <antoine.cezar@octobus.net> parents: diff changeset	277 impl<'a> RevlogEntry<'a> {
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation Antoine Cezar <antoine.cezar@octobus.net> parents: diff changeset	278 /// Extract the data contained in the entry.
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation Antoine Cezar <antoine.cezar@octobus.net> parents: diff changeset	279 pub fn data(&self) -> Result<Cow<'_, [u8]>, RevlogError> {
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation Antoine Cezar <antoine.cezar@octobus.net> parents: diff changeset	280 if self.bytes.is_empty() {
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation Antoine Cezar <antoine.cezar@octobus.net> parents: diff changeset	281 return Ok(Cow::Borrowed(&[]));
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation Antoine Cezar <antoine.cezar@octobus.net> parents: diff changeset	282 }
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation Antoine Cezar <antoine.cezar@octobus.net> parents: diff changeset	283 match self.bytes[0] {
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation Antoine Cezar <antoine.cezar@octobus.net> parents: diff changeset	284 // Revision data is the entirety of the entry, including this
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation Antoine Cezar <antoine.cezar@octobus.net> parents: diff changeset	285 // header.
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation Antoine Cezar <antoine.cezar@octobus.net> parents: diff changeset	286 b'\0' => Ok(Cow::Borrowed(self.bytes)),
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation Antoine Cezar <antoine.cezar@octobus.net> parents: diff changeset	287 // Raw revision data follows.
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation Antoine Cezar <antoine.cezar@octobus.net> parents: diff changeset	288 b'u' => Ok(Cow::Borrowed(&self.bytes[1..])),
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation Antoine Cezar <antoine.cezar@octobus.net> parents: diff changeset	289 // zlib (RFC 1950) data.
45598 497657895b54 hg-core: return `Err` on decompression error (D8958#inline-15004 followup) Antoine cezar<acezar@chwitlabs.fr> parents: 45542 diff changeset	290 b'x' => Ok(Cow::Owned(self.uncompressed_zlib_data()?)),
45532 26c53ee51c68 hg-core: Add a limited read only `revlog` implementation Antoine Cezar <antoine.cezar@octobus.net> parents: diff changeset	291 // zstd data.
45598 497657895b54 hg-core: return `Err` on decompression error (D8958#inline-15004 followup) Antoine cezar<acezar@chwitlabs.fr> parents: 45542 diff changeset	292 b'\x28' => Ok(Cow::Owned(self.uncompressed_zstd_data()?)),
45532 26c53ee51c68 hg-core: Add a limited read only `revlog` implementation Antoine Cezar <antoine.cezar@octobus.net> parents: diff changeset	293 format_type => Err(RevlogError::UnknowDataFormat(format_type)),
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation Antoine Cezar <antoine.cezar@octobus.net> parents: diff changeset	294 }
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation Antoine Cezar <antoine.cezar@octobus.net> parents: diff changeset	295 }
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation Antoine Cezar <antoine.cezar@octobus.net> parents: diff changeset	296
45598 497657895b54 hg-core: return `Err` on decompression error (D8958#inline-15004 followup) Antoine cezar<acezar@chwitlabs.fr> parents: 45542 diff changeset	297 fn uncompressed_zlib_data(&self) -> Result<Vec<u8>, RevlogError> {
45532 26c53ee51c68 hg-core: Add a limited read only `revlog` implementation Antoine Cezar <antoine.cezar@octobus.net> parents: diff changeset	298 let mut decoder = ZlibDecoder::new(self.bytes);
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation Antoine Cezar <antoine.cezar@octobus.net> parents: diff changeset	299 if self.is_delta() {
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation Antoine Cezar <antoine.cezar@octobus.net> parents: diff changeset	300 let mut buf = Vec::with_capacity(self.compressed_len);
45598 497657895b54 hg-core: return `Err` on decompression error (D8958#inline-15004 followup) Antoine cezar<acezar@chwitlabs.fr> parents: 45542 diff changeset	301 decoder
497657895b54 hg-core: return `Err` on decompression error (D8958#inline-15004 followup) Antoine cezar<acezar@chwitlabs.fr> parents: 45542 diff changeset	302 .read_to_end(&mut buf)
497657895b54 hg-core: return `Err` on decompression error (D8958#inline-15004 followup) Antoine cezar<acezar@chwitlabs.fr> parents: 45542 diff changeset	303 .or(Err(RevlogError::Corrupted))?;
497657895b54 hg-core: return `Err` on decompression error (D8958#inline-15004 followup) Antoine cezar<acezar@chwitlabs.fr> parents: 45542 diff changeset	304 Ok(buf)
45532 26c53ee51c68 hg-core: Add a limited read only `revlog` implementation Antoine Cezar <antoine.cezar@octobus.net> parents: diff changeset	305 } else {
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation Antoine Cezar <antoine.cezar@octobus.net> parents: diff changeset	306 let mut buf = vec![0; self.uncompressed_len];
45598 497657895b54 hg-core: return `Err` on decompression error (D8958#inline-15004 followup) Antoine cezar<acezar@chwitlabs.fr> parents: 45542 diff changeset	307 decoder
497657895b54 hg-core: return `Err` on decompression error (D8958#inline-15004 followup) Antoine cezar<acezar@chwitlabs.fr> parents: 45542 diff changeset	308 .read_exact(&mut buf)
497657895b54 hg-core: return `Err` on decompression error (D8958#inline-15004 followup) Antoine cezar<acezar@chwitlabs.fr> parents: 45542 diff changeset	309 .or(Err(RevlogError::Corrupted))?;
497657895b54 hg-core: return `Err` on decompression error (D8958#inline-15004 followup) Antoine cezar<acezar@chwitlabs.fr> parents: 45542 diff changeset	310 Ok(buf)
45532 26c53ee51c68 hg-core: Add a limited read only `revlog` implementation Antoine Cezar <antoine.cezar@octobus.net> parents: diff changeset	311 }
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation Antoine Cezar <antoine.cezar@octobus.net> parents: diff changeset	312 }
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation Antoine Cezar <antoine.cezar@octobus.net> parents: diff changeset	313
45598 497657895b54 hg-core: return `Err` on decompression error (D8958#inline-15004 followup) Antoine cezar<acezar@chwitlabs.fr> parents: 45542 diff changeset	314 fn uncompressed_zstd_data(&self) -> Result<Vec<u8>, RevlogError> {
45532 26c53ee51c68 hg-core: Add a limited read only `revlog` implementation Antoine Cezar <antoine.cezar@octobus.net> parents: diff changeset	315 if self.is_delta() {
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation Antoine Cezar <antoine.cezar@octobus.net> parents: diff changeset	316 let mut buf = Vec::with_capacity(self.compressed_len);
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation Antoine Cezar <antoine.cezar@octobus.net> parents: diff changeset	317 zstd::stream::copy_decode(self.bytes, &mut buf)
45598 497657895b54 hg-core: return `Err` on decompression error (D8958#inline-15004 followup) Antoine cezar<acezar@chwitlabs.fr> parents: 45542 diff changeset	318 .or(Err(RevlogError::Corrupted))?;
497657895b54 hg-core: return `Err` on decompression error (D8958#inline-15004 followup) Antoine cezar<acezar@chwitlabs.fr> parents: 45542 diff changeset	319 Ok(buf)
45532 26c53ee51c68 hg-core: Add a limited read only `revlog` implementation Antoine Cezar <antoine.cezar@octobus.net> parents: diff changeset	320 } else {
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation Antoine Cezar <antoine.cezar@octobus.net> parents: diff changeset	321 let mut buf = vec![0; self.uncompressed_len];
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation Antoine Cezar <antoine.cezar@octobus.net> parents: diff changeset	322 let len = zstd::block::decompress_to_buffer(self.bytes, &mut buf)
45598 497657895b54 hg-core: return `Err` on decompression error (D8958#inline-15004 followup) Antoine cezar<acezar@chwitlabs.fr> parents: 45542 diff changeset	323 .or(Err(RevlogError::Corrupted))?;
497657895b54 hg-core: return `Err` on decompression error (D8958#inline-15004 followup) Antoine cezar<acezar@chwitlabs.fr> parents: 45542 diff changeset	324 if len != self.uncompressed_len {
497657895b54 hg-core: return `Err` on decompression error (D8958#inline-15004 followup) Antoine cezar<acezar@chwitlabs.fr> parents: 45542 diff changeset	325 Err(RevlogError::Corrupted)
497657895b54 hg-core: return `Err` on decompression error (D8958#inline-15004 followup) Antoine cezar<acezar@chwitlabs.fr> parents: 45542 diff changeset	326 } else {
497657895b54 hg-core: return `Err` on decompression error (D8958#inline-15004 followup) Antoine cezar<acezar@chwitlabs.fr> parents: 45542 diff changeset	327 Ok(buf)
497657895b54 hg-core: return `Err` on decompression error (D8958#inline-15004 followup) Antoine cezar<acezar@chwitlabs.fr> parents: 45542 diff changeset	328 }
45532 26c53ee51c68 hg-core: Add a limited read only `revlog` implementation Antoine Cezar <antoine.cezar@octobus.net> parents: diff changeset	329 }
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation Antoine Cezar <antoine.cezar@octobus.net> parents: diff changeset	330 }
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation Antoine Cezar <antoine.cezar@octobus.net> parents: diff changeset	331
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation Antoine Cezar <antoine.cezar@octobus.net> parents: diff changeset	332 /// Tell if the entry is a snapshot or a delta
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation Antoine Cezar <antoine.cezar@octobus.net> parents: diff changeset	333 /// (influences on decompression).
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation Antoine Cezar <antoine.cezar@octobus.net> parents: diff changeset	334 fn is_delta(&self) -> bool {
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation Antoine Cezar <antoine.cezar@octobus.net> parents: diff changeset	335 self.base_rev.is_some()
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation Antoine Cezar <antoine.cezar@octobus.net> parents: diff changeset	336 }
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation Antoine Cezar <antoine.cezar@octobus.net> parents: diff changeset	337 }
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation Antoine Cezar <antoine.cezar@octobus.net> parents: diff changeset	338
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation Antoine Cezar <antoine.cezar@octobus.net> parents: diff changeset	339 /// Format version of the revlog.
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation Antoine Cezar <antoine.cezar@octobus.net> parents: diff changeset	340 pub fn get_version(index_bytes: &[u8]) -> u16 {
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation Antoine Cezar <antoine.cezar@octobus.net> parents: diff changeset	341 BigEndian::read_u16(&index_bytes[2..=3])
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation Antoine Cezar <antoine.cezar@octobus.net> parents: diff changeset	342 }
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation Antoine Cezar <antoine.cezar@octobus.net> parents: diff changeset	343
45537 b0d6309ff50c hg-core: check data integrity in `Revlog` Antoine Cezar <antoine.cezar@octobus.net> parents: 45532 diff changeset	344 /// Calculate the hash of a revision given its data and its parents.
b0d6309ff50c hg-core: check data integrity in `Revlog` Antoine Cezar <antoine.cezar@octobus.net> parents: 45532 diff changeset	345 fn hash(data: &[u8], p1_hash: &[u8], p2_hash: &[u8]) -> Vec<u8> {
b0d6309ff50c hg-core: check data integrity in `Revlog` Antoine Cezar <antoine.cezar@octobus.net> parents: 45532 diff changeset	346 let mut hasher = Sha1::new();
b0d6309ff50c hg-core: check data integrity in `Revlog` Antoine Cezar <antoine.cezar@octobus.net> parents: 45532 diff changeset	347 let (a, b) = (p1_hash, p2_hash);
b0d6309ff50c hg-core: check data integrity in `Revlog` Antoine Cezar <antoine.cezar@octobus.net> parents: 45532 diff changeset	348 if a > b {
b0d6309ff50c hg-core: check data integrity in `Revlog` Antoine Cezar <antoine.cezar@octobus.net> parents: 45532 diff changeset	349 hasher.input(b);
b0d6309ff50c hg-core: check data integrity in `Revlog` Antoine Cezar <antoine.cezar@octobus.net> parents: 45532 diff changeset	350 hasher.input(a);
b0d6309ff50c hg-core: check data integrity in `Revlog` Antoine Cezar <antoine.cezar@octobus.net> parents: 45532 diff changeset	351 } else {
b0d6309ff50c hg-core: check data integrity in `Revlog` Antoine Cezar <antoine.cezar@octobus.net> parents: 45532 diff changeset	352 hasher.input(a);
b0d6309ff50c hg-core: check data integrity in `Revlog` Antoine Cezar <antoine.cezar@octobus.net> parents: 45532 diff changeset	353 hasher.input(b);
b0d6309ff50c hg-core: check data integrity in `Revlog` Antoine Cezar <antoine.cezar@octobus.net> parents: 45532 diff changeset	354 }
b0d6309ff50c hg-core: check data integrity in `Revlog` Antoine Cezar <antoine.cezar@octobus.net> parents: 45532 diff changeset	355 hasher.input(data);
b0d6309ff50c hg-core: check data integrity in `Revlog` Antoine Cezar <antoine.cezar@octobus.net> parents: 45532 diff changeset	356 let mut hash = vec![0; NODE_BYTES_LENGTH];
b0d6309ff50c hg-core: check data integrity in `Revlog` Antoine Cezar <antoine.cezar@octobus.net> parents: 45532 diff changeset	357 hasher.result(&mut hash);
b0d6309ff50c hg-core: check data integrity in `Revlog` Antoine Cezar <antoine.cezar@octobus.net> parents: 45532 diff changeset	358 hash
b0d6309ff50c hg-core: check data integrity in `Revlog` Antoine Cezar <antoine.cezar@octobus.net> parents: 45532 diff changeset	359 }
b0d6309ff50c hg-core: check data integrity in `Revlog` Antoine Cezar <antoine.cezar@octobus.net> parents: 45532 diff changeset	360
45532 26c53ee51c68 hg-core: Add a limited read only `revlog` implementation Antoine Cezar <antoine.cezar@octobus.net> parents: diff changeset	361 #[cfg(test)]
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation Antoine Cezar <antoine.cezar@octobus.net> parents: diff changeset	362 mod tests {
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation Antoine Cezar <antoine.cezar@octobus.net> parents: diff changeset	363 use super::*;
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation Antoine Cezar <antoine.cezar@octobus.net> parents: diff changeset	364
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation Antoine Cezar <antoine.cezar@octobus.net> parents: diff changeset	365 use super::super::index::IndexEntryBuilder;
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation Antoine Cezar <antoine.cezar@octobus.net> parents: diff changeset	366
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation Antoine Cezar <antoine.cezar@octobus.net> parents: diff changeset	367 #[test]
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation Antoine Cezar <antoine.cezar@octobus.net> parents: diff changeset	368 fn version_test() {
45604 900b9b79b99c hg-core: make `Index` owner of its bytes (D8958#inline-14994 followup 1/2) Antoine cezar<acezar@chwitlabs.fr> parents: 45598 diff changeset	369 let bytes = IndexEntryBuilder::new()
900b9b79b99c hg-core: make `Index` owner of its bytes (D8958#inline-14994 followup 1/2) Antoine cezar<acezar@chwitlabs.fr> parents: 45598 diff changeset	370 .is_first(true)
45532 26c53ee51c68 hg-core: Add a limited read only `revlog` implementation Antoine Cezar <antoine.cezar@octobus.net> parents: diff changeset	371 .with_version(1)
45604 900b9b79b99c hg-core: make `Index` owner of its bytes (D8958#inline-14994 followup 1/2) Antoine cezar<acezar@chwitlabs.fr> parents: 45598 diff changeset	372 .build();
45532 26c53ee51c68 hg-core: Add a limited read only `revlog` implementation Antoine Cezar <antoine.cezar@octobus.net> parents: diff changeset	373
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation Antoine Cezar <antoine.cezar@octobus.net> parents: diff changeset	374 assert_eq!(get_version(&bytes), 1)
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation Antoine Cezar <antoine.cezar@octobus.net> parents: diff changeset	375 }
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation Antoine Cezar <antoine.cezar@octobus.net> parents: diff changeset	376 }

Mercurial > public > mercurial-scm > hg-stable

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