Mercurial > hg
view rust/hg-core/src/revset.rs @ 50660:bf16ef96defe stable
rust-dirstate: fall back to v1 if reading v2 failed
This will help us not fail when a v1 dirstate is present on disk while a v2
was expected (which could happen with a racy/interrupted upgrade).
author | Raphaël Gomès <rgomes@octobus.net> |
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date | Mon, 05 Jun 2023 16:43:27 +0200 |
parents | 750409505286 |
children | 1928b770e3e7 |
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//! The revset query language //! //! <https://www.mercurial-scm.org/repo/hg/help/revsets> use crate::errors::HgError; use crate::repo::Repo; use crate::revlog::NodePrefix; use crate::revlog::{Revision, NULL_REVISION, WORKING_DIRECTORY_HEX}; use crate::revlog::{Revlog, RevlogError}; use crate::Node; /// Resolve a query string into a single revision. /// /// Only some of the revset language is implemented yet. pub fn resolve_single( input: &str, repo: &Repo, ) -> Result<Revision, RevlogError> { let changelog = repo.changelog()?; match input { "." => { let p1 = repo.dirstate_parents()?.p1; return changelog.revlog.rev_from_node(p1.into()); } "null" => return Ok(NULL_REVISION), _ => {} } match resolve_rev_number_or_hex_prefix(input, &changelog.revlog) { Err(RevlogError::InvalidRevision) => { // TODO: support for the rest of the language here. let msg = format!("cannot parse revset '{}'", input); Err(HgError::unsupported(msg).into()) } result => result, } } /// Resolve the small subset of the language suitable for revlogs other than /// the changelog, such as in `hg debugdata --manifest` CLI argument. /// /// * A non-negative decimal integer for a revision number, or /// * An hexadecimal string, for the unique node ID that starts with this /// prefix pub fn resolve_rev_number_or_hex_prefix( input: &str, revlog: &Revlog, ) -> Result<Revision, RevlogError> { // The Python equivalent of this is part of `revsymbol` in // `mercurial/scmutil.py` if let Ok(integer) = input.parse::<i32>() { if integer.to_string() == input && integer >= 0 && revlog.has_rev(integer) { return Ok(integer); } } if let Ok(prefix) = NodePrefix::from_hex(input) { if prefix.is_prefix_of(&Node::from_hex(WORKING_DIRECTORY_HEX).unwrap()) { return Err(RevlogError::WDirUnsupported); } return revlog.rev_from_node(prefix); } Err(RevlogError::InvalidRevision) }