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// list_tracked_files.rs
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//
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// Copyright 2020 Antoine Cezar <antoine.cezar@octobus.net>
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//
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// This software may be used and distributed according to the terms of the
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// GNU General Public License version 2 or any later version.
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use crate::repo::Repo;
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use crate::revlog::revlog::RevlogError;
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use crate::revlog::Node;
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use crate::utils::hg_path::HgPathBuf;
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pub struct CatOutput {
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/// Whether any file in the manifest matched the paths given as CLI
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/// arguments
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pub found_any: bool,
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/// The contents of matching files, in manifest order
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pub concatenated: Vec<u8>,
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/// Which of the CLI arguments did not match any manifest file
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pub missing: Vec<HgPathBuf>,
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/// The node ID that the given revset was resolved to
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pub node: Node,
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}
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/// Output the given revision of files
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///
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/// * `root`: Repository root
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/// * `rev`: The revision to cat the files from.
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/// * `files`: The files to output.
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pub fn cat<'a>(
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repo: &Repo,
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revset: &str,
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files: &'a [HgPathBuf],
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) -> Result<CatOutput, RevlogError> {
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let rev = crate::revset::resolve_single(revset, repo)?;
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let manifest = repo.manifest(rev)?;
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let node = *repo
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.changelog()?
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.node_from_rev(rev)
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.expect("should succeed when repo.manifest did");
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let mut bytes = vec![];
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let mut matched = vec![false; files.len()];
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let mut found_any = false;
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for (manifest_file, node_bytes) in manifest.files_with_nodes() {
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for (cat_file, is_matched) in files.iter().zip(&mut matched) {
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if cat_file.as_bytes() == manifest_file.as_bytes() {
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*is_matched = true;
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found_any = true;
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let file_log = repo.filelog(manifest_file)?;
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let file_node = Node::from_hex_for_repo(node_bytes)?;
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let entry = file_log.get_node(file_node)?;
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bytes.extend(entry.data()?)
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}
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}
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}
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let missing: Vec<_> = files
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.iter()
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.zip(&matched)
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.filter(|pair| !*pair.1)
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.map(|pair| pair.0.clone())
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.collect();
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Ok(CatOutput {
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found_any,
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concatenated: bytes,
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missing,
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node,
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})
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}
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