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annotate rust/hg-core/src/operations/debugdata.rs @ 46433:4b381dbbf8b7

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rhg: centralize parsing of `--rev` CLI arguments This new module will be the place to implement more of the revset language when we do so. Differential Revision: https://phab.mercurial-scm.org/D9873
author Simon Sapin <simon.sapin@octobus.net>
date Tue, 26 Jan 2021 18:31:46 +0100
parents 645ee7225fab
children 3e2d539d0d1a
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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1 // debugdata.rs
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2 //
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3 // Copyright 2020 Antoine Cezar <antoine.cezar@octobus.net>
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4 //
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5 // This software may be used and distributed according to the terms of the
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6 // GNU General Public License version 2 or any later version.
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7
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8 use crate::repo::Repo;
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9 use crate::revlog::revlog::{Revlog, RevlogError};
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10
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11 /// Kind of data to debug
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12 #[derive(Debug, Copy, Clone)]
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13 pub enum DebugDataKind {
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14 Changelog,
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15 Manifest,
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16 }
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17
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18 /// Kind of error encountered by DebugData
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19 #[derive(Debug)]
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20 pub enum DebugDataErrorKind {
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21 /// Error when reading a `revlog` file.
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22 IoError(std::io::Error),
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23 /// The revision has not been found.
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24 InvalidRevision,
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25 /// Found more than one revision whose ID match the requested prefix
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26 AmbiguousPrefix,
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27 /// A `revlog` file is corrupted.
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28 CorruptedRevlog,
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29 /// The `revlog` format version is not supported.
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30 UnsuportedRevlogVersion(u16),
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31 /// The `revlog` data format is not supported.
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32 UnknowRevlogDataFormat(u8),
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33 }
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34
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35 /// A DebugData error
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36 #[derive(Debug)]
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37 pub struct DebugDataError {
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38 /// Kind of error encountered by DebugData
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39 pub kind: DebugDataErrorKind,
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40 }
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41
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42 impl From<DebugDataErrorKind> for DebugDataError {
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43 fn from(kind: DebugDataErrorKind) -> Self {
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44 DebugDataError { kind }
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45 }
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46 }
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47
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48 impl From<std::io::Error> for DebugDataError {
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49 fn from(err: std::io::Error) -> Self {
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50 let kind = DebugDataErrorKind::IoError(err);
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51 DebugDataError { kind }
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52 }
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53 }
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54
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55 impl From<RevlogError> for DebugDataError {
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56 fn from(err: RevlogError) -> Self {
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57 match err {
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58 RevlogError::IoError(err) => DebugDataErrorKind::IoError(err),
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59 RevlogError::UnsuportedVersion(version) => {
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60 DebugDataErrorKind::UnsuportedRevlogVersion(version)
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61 }
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62 RevlogError::InvalidRevision => {
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63 DebugDataErrorKind::InvalidRevision
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64 }
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65 RevlogError::AmbiguousPrefix => {
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66 DebugDataErrorKind::AmbiguousPrefix
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67 }
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68 RevlogError::Corrupted => DebugDataErrorKind::CorruptedRevlog,
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69 RevlogError::UnknowDataFormat(format) => {
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70 DebugDataErrorKind::UnknowRevlogDataFormat(format)
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71 }
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72 }
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73 .into()
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74 }
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75 }
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76
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77 /// Dump the contents data of a revision.
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78 pub fn debug_data(
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79 repo: &Repo,
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80 revset: &str,
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81 kind: DebugDataKind,
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82 ) -> Result<Vec<u8>, DebugDataError> {
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83 let index_file = match kind {
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84 DebugDataKind::Changelog => "00changelog.i",
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85 DebugDataKind::Manifest => "00manifest.i",
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86 };
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87 let revlog = Revlog::open(repo, index_file, None)?;
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88 let rev =
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89 crate::revset::resolve_rev_number_or_hex_prefix(revset, &revlog)?;
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90 let data = revlog.get_rev_data(rev)?;
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91 Ok(data)
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92 }