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annotate rust/hg-core/src/operations/debugdata.rs @ 49175:34decbaf4da3

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node: manually implement Debug I got too irritated today with the default Debug implementation of hg::revlog::Node while playing with a new parser. This isn't quite what I wanted, but it wasn't much code and it at least gives you output that's easy to visually compare to a node.hex()ed identifier from the Python side of things. Sadly, this doesn't influence the output in lldb or the VSCode debugger extension that uses lldb under the covers, but it at least means debug prints are a little more useful. Differential Revision: https://phab.mercurial-scm.org/D12608
author Augie Fackler <augie@google.com>
date Thu, 05 May 2022 14:47:26 -0400
parents 399439c12223
children 750409505286
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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::requirements;
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10 use crate::revlog::revlog::{Revlog, RevlogError};
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11
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12 /// Kind of data to debug
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13 #[derive(Debug, Copy, Clone)]
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14 pub enum DebugDataKind {
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15 Changelog,
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16 Manifest,
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17 }
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18
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19 /// Dump the contents data of a revision.
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20 pub fn debug_data(
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21 repo: &Repo,
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22 revset: &str,
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23 kind: DebugDataKind,
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24 ) -> Result<Vec<u8>, RevlogError> {
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25 let index_file = match kind {
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26 DebugDataKind::Changelog => "00changelog.i",
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27 DebugDataKind::Manifest => "00manifest.i",
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28 };
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29 let use_nodemap = repo
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30 .requirements()
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31 .contains(requirements::NODEMAP_REQUIREMENT);
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32 let revlog =
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33 Revlog::open(&repo.store_vfs(), index_file, None, use_nodemap)?;
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34 let rev =
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35 crate::revset::resolve_rev_number_or_hex_prefix(revset, &revlog)?;
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36 let data = revlog.get_rev_data(rev)?;
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37 Ok(data.into_owned())
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38 }