Mercurial > public > mercurial-scm > hg-stable

annotate rust/hg-core/src/revset.rs @ 52552:66e34bc44280

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rhg: set the expected temp file permissions (0o666 minus umask) This continues the theme of a48c688d3e80, and fixes the bug #6375, which was causing some problems for us, where a non-group-readable file can't be copied, which breaks some tools that copy the repo. This affects both the `checkexec` file and the temporary file we use for filesystem time measurement, since either of these files remaining on disk can cause this problem, and the 0666 permissions are just the better default here.
author Arseniy Alekseyev <aalekseyev@janestreet.com>
date Thu, 05 Dec 2024 13:17:32 +0000
parents 652149ed64f0
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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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::errors::HgError;
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6 use crate::repo::Repo;
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7 use crate::revlog::NodePrefix;
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8 use crate::revlog::{Revision, NULL_REVISION, WORKING_DIRECTORY_HEX};
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9 use crate::revlog::{Revlog, RevlogError};
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10 use crate::Node;
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11
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12 /// Resolve a query string into a single revision.
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13 ///
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14 /// Only some of the revset language is implemented yet.
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15 pub fn resolve_single(
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16 input: &str,
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17 repo: &Repo,
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18 ) -> Result<Revision, RevlogError> {
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19 let changelog = repo.changelog()?;
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20
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21 match input {
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22 "." => {
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23 let p1 = repo.dirstate_parents()?.p1;
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24 return changelog.revlog.rev_from_node(p1.into());
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25 }
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26 "null" => return Ok(NULL_REVISION),
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27 _ => {}
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28 }
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29
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30 match resolve_rev_number_or_hex_prefix(input, &changelog.revlog) {
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31 Err(RevlogError::InvalidRevision(revision)) => {
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32 // TODO: support for the rest of the language here.
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33 let msg = format!("cannot parse revset '{}'", revision);
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34 Err(HgError::unsupported(msg).into())
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35 }
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36 result => result,
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37 }
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38 }
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39
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40 /// Resolve the small subset of the language suitable for revlogs other than
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41 /// the changelog, such as in `hg debugdata --manifest` CLI argument.
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42 ///
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43 /// * A non-negative decimal integer for a revision number, or
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44 /// * An hexadecimal string, for the unique node ID that starts with this
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45 /// prefix
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46 pub fn resolve_rev_number_or_hex_prefix(
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47 input: &str,
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48 revlog: &Revlog,
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49 ) -> Result<Revision, RevlogError> {
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50 // The Python equivalent of this is part of `revsymbol` in
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51 // `mercurial/scmutil.py`
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52
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53 if let Ok(integer) = input.parse::<i32>() {
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54 if integer.to_string() == input
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55 && integer >= 0
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56 && revlog.has_rev(integer.into())
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57 {
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58 // This is fine because we've just checked that the revision is
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59 // valid for the given revlog.
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60 return Ok(Revision(integer));
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61 }
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62 }
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63 if let Ok(prefix) = NodePrefix::from_hex(input) {
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64 if prefix.is_prefix_of(&Node::from_hex(WORKING_DIRECTORY_HEX).unwrap())
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65 {
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66 return Err(RevlogError::WDirUnsupported);
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67 }
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68 return revlog.rev_from_node(prefix);
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69 }
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70 Err(RevlogError::InvalidRevision(input.to_string()))
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71 }