Mercurial > hg
view rust/hg-core/src/operations/cat.rs @ 48343:eb428010aad2
rhg: Also parse flags in the manifest parser
Differential Revision: https://phab.mercurial-scm.org/D11772
author | Simon Sapin <simon.sapin@octobus.net> |
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date | Tue, 23 Nov 2021 19:39:51 +0100 |
parents | 10c32e1b892a |
children | 20d0d896183e |
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// list_tracked_files.rs // // Copyright 2020 Antoine Cezar <antoine.cezar@octobus.net> // // This software may be used and distributed according to the terms of the // GNU General Public License version 2 or any later version. use crate::repo::Repo; use crate::revlog::revlog::RevlogError; use crate::revlog::Node; use crate::utils::hg_path::HgPath; use crate::errors::HgError; use crate::manifest::Manifest; use crate::manifest::ManifestEntry; use itertools::put_back; use itertools::PutBack; use std::cmp::Ordering; pub struct CatOutput<'a> { /// Whether any file in the manifest matched the paths given as CLI /// arguments pub found_any: bool, /// The contents of matching files, in manifest order pub results: Vec<(&'a HgPath, Vec<u8>)>, /// Which of the CLI arguments did not match any manifest file pub missing: Vec<&'a HgPath>, /// The node ID that the given revset was resolved to pub node: Node, } // Find an item in an iterator over a sorted collection. fn find_item<'a>( i: &mut PutBack<impl Iterator<Item = Result<ManifestEntry<'a>, HgError>>>, needle: &HgPath, ) -> Result<Option<Node>, HgError> { loop { match i.next() { None => return Ok(None), Some(result) => { let entry = result?; match needle.as_bytes().cmp(entry.path.as_bytes()) { Ordering::Less => { i.put_back(Ok(entry)); return Ok(None); } Ordering::Greater => continue, Ordering::Equal => return Ok(Some(entry.node_id()?)), } } } } } fn find_files_in_manifest<'query>( manifest: &Manifest, query: impl Iterator<Item = &'query HgPath>, ) -> Result<(Vec<(&'query HgPath, Node)>, Vec<&'query HgPath>), HgError> { let mut manifest = put_back(manifest.iter()); let mut res = vec![]; let mut missing = vec![]; for file in query { match find_item(&mut manifest, file)? { None => missing.push(file), Some(item) => res.push((file, item)), } } return Ok((res, missing)); } /// Output the given revision of files /// /// * `root`: Repository root /// * `rev`: The revision to cat the files from. /// * `files`: The files to output. pub fn cat<'a>( repo: &Repo, revset: &str, mut files: Vec<&'a HgPath>, ) -> Result<CatOutput<'a>, RevlogError> { let rev = crate::revset::resolve_single(revset, repo)?; let manifest = repo.manifest_for_rev(rev)?; let node = *repo .changelog()? .node_from_rev(rev) .expect("should succeed when repo.manifest did"); let mut results: Vec<(&'a HgPath, Vec<u8>)> = vec![]; let mut found_any = false; files.sort_unstable(); let (found, missing) = find_files_in_manifest( &manifest, files.into_iter().map(|f| f.as_ref()), )?; for (file_path, file_node) in found { found_any = true; let file_log = repo.filelog(file_path)?; results.push(( file_path, file_log.data_for_node(file_node)?.into_data()?, )); } Ok(CatOutput { found_any, results, missing, node, }) }