Mercurial > hg
view rust/hg-core/src/revset.rs @ 46433:4b381dbbf8b7
rhg: centralize parsing of `--rev` CLI arguments
This new module will be the place to implement more of the revset language
when we do so.
Differential Revision: https://phab.mercurial-scm.org/D9873
author | Simon Sapin <simon.sapin@octobus.net> |
---|---|
date | Tue, 26 Jan 2021 18:31:46 +0100 |
parents | |
children | df247f58ecee |
line wrap: on
line source
//! The revset query language //! //! <https://www.mercurial-scm.org/repo/hg/help/revsets> use crate::repo::Repo; use crate::revlog::changelog::Changelog; use crate::revlog::revlog::{Revlog, RevlogError}; use crate::revlog::NodePrefix; use crate::revlog::{Revision, NULL_REVISION}; /// 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 = Changelog::open(repo)?; match resolve_rev_number_or_hex_prefix(input, &changelog.revlog) { Err(RevlogError::InvalidRevision) => {} // Try other syntax result => return result, } if input == "null" { return Ok(NULL_REVISION); } // TODO: support for the rest of the language here. Err(RevlogError::InvalidRevision) } /// 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> { if let Ok(integer) = input.parse::<i32>() { if integer >= 0 && revlog.has_rev(integer) { return Ok(integer); } } if let Ok(prefix) = NodePrefix::from_hex(input) { return revlog.get_node_rev(prefix); } Err(RevlogError::InvalidRevision) }