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annotate rust/hg-core/src/revset.rs @ 46563:c19c662097e1

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copies: detect case when a merge decision overwrite previous data We now detect and record when a merge case required special logic (eg: thing that append during the merge, ambiguity leading to picking p1 data, etc) and we explicitly mark the result as superseding the previous data. This fixes the family of test we previously added. Differential Revision: https://phab.mercurial-scm.org/D9613
author Pierre-Yves David <pierre-yves.david@octobus.net>
date Sat, 12 Dec 2020 19:35:08 +0100
parents 4b381dbbf8b7
children df247f58ecee
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1 //! The revset query language
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2 //!
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3 //! <https://www.mercurial-scm.org/repo/hg/help/revsets>
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4
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5 use crate::repo::Repo;
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6 use crate::revlog::changelog::Changelog;
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7 use crate::revlog::revlog::{Revlog, RevlogError};
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8 use crate::revlog::NodePrefix;
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9 use crate::revlog::{Revision, NULL_REVISION};
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10
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11 /// Resolve a query string into a single revision.
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12 ///
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13 /// Only some of the revset language is implemented yet.
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14 pub fn resolve_single(
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15 input: &str,
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16 repo: &Repo,
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17 ) -> Result<Revision, RevlogError> {
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18 let changelog = Changelog::open(repo)?;
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19
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20 match resolve_rev_number_or_hex_prefix(input, &changelog.revlog) {
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21 Err(RevlogError::InvalidRevision) => {} // Try other syntax
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22 result => return result,
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23 }
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24
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25 if input == "null" {
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26 return Ok(NULL_REVISION);
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27 }
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28
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29 // TODO: support for the rest of the language here.
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30
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31 Err(RevlogError::InvalidRevision)
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32 }
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33
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34 /// Resolve the small subset of the language suitable for revlogs other than
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35 /// the changelog, such as in `hg debugdata --manifest` CLI argument.
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36 ///
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37 /// * A non-negative decimal integer for a revision number, or
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38 /// * An hexadecimal string, for the unique node ID that starts with this
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39 /// prefix
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40 pub fn resolve_rev_number_or_hex_prefix(
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41 input: &str,
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42 revlog: &Revlog,
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43 ) -> Result<Revision, RevlogError> {
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44 if let Ok(integer) = input.parse::<i32>() {
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45 if integer >= 0 && revlog.has_rev(integer) {
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46 return Ok(integer);
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47 }
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48 }
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49 if let Ok(prefix) = NodePrefix::from_hex(input) {
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50 return revlog.get_node_rev(prefix);
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51 }
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52 Err(RevlogError::InvalidRevision)
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53 }