Mercurial > public > mercurial-scm > hg-stable

annotate rust/hg-core/src/revset.rs @ 46617:a34cd9aa3323

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
copies-rust: yield both p1 and p2 copies in `ChangedFiles.actions()` Instead of filtering the relevant parent inside de ChangedFiles method, we now yield all copies information and let the caller do the filtering. Soon, the filtering will be replaced by dispatching. Differential Revision: https://phab.mercurial-scm.org/D9649
author Pierre-Yves David <pierre-yves.david@octobus.net>
date Mon, 21 Dec 2020 10:24:16 +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 }