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Differential D9264

rhg: strip copied files metadata from `cat` output
ClosedPublic

Authored by acezar on Oct 30 2020, 5:01 AM.

Details

Reviewers
Alphare
Group Reviewers
hg-reviewers
Commits
rHG6991f3014311: rhg: strip copied files metadata from `cat` output
rHG056aeed4a1c3: rhg: strip copied files metadata from `cat` output

Diff Detail

Repository
rHG Mercurial
Lint
Automatic diff as part of commit; lint not applicable.
Unit
Automatic diff as part of commit; unit tests not applicable.

Event Timeline

acezar created this revision.Oct 30 2020, 5:01 AM
Alphare accepted this revision.Oct 30 2020, 5:08 AM
Alphare added a subscriber: Alphare.

Looks good!

Antoine cezar <acezar@chwitlabs.fr> added a commit: rHG056aeed4a1c3: rhg: strip copied files metadata from `cat` output.Oct 30 2020, 1:04 PM
This revision was not accepted when it landed; it landed in state Needs Review.
Closed by commit rHG056aeed4a1c3: rhg: strip copied files metadata from `cat` output (authored by Antoine cezar <acezar@chwitlabs.fr>). · Explain Why
This revision was automatically updated to reflect the committed changes.

Revision Contents
Changeset List

PathPackages
Mrust/hg-core/src/operations/cat.rs (15 lines)
Mtests/test-rhg.t (16 lines)

Diff 23381

rust/hg-core/src/operations/cat.rs

use crate::revlog::changelog::Changelog; use crate::revlog::changelog::Changelog;
use crate::revlog::manifest::{Manifest, ManifestEntry}; use crate::revlog::manifest::{Manifest, ManifestEntry};
use crate::revlog::path_encode::path_encode; use crate::revlog::path_encode::path_encode;
use crate::revlog::revlog::Revlog; use crate::revlog::revlog::Revlog;
use crate::revlog::revlog::RevlogError; use crate::revlog::revlog::RevlogError;
use crate::revlog::Revision; use crate::revlog::Revision;
use crate::utils::hg_path::HgPathBuf; use crate::utils::hg_path::HgPathBuf;
const METADATA_DELIMITER: [u8; 2] = [b'\x01', b'\n'];
/// Kind of error encountered by `CatRev` /// Kind of error encountered by `CatRev`
#[derive(Debug)] #[derive(Debug)]
pub enum CatRevErrorKind { pub enum CatRevErrorKind {
/// Error when reading a `revlog` file. /// Error when reading a `revlog` file.
IoError(std::io::Error), IoError(std::io::Error),
/// The revision has not been found. /// The revision has not been found.
InvalidRevision, InvalidRevision,
/// A `revlog` file is corrupted. /// A `revlog` file is corrupted.
); );
let revlog_index_path = let revlog_index_path =
self.root.join(&revlog_index_string); self.root.join(&revlog_index_string);
let file_log = Revlog::open(&revlog_index_path)?; let file_log = Revlog::open(&revlog_index_path)?;
let file_node = hex::decode(&node_bytes) let file_node = hex::decode(&node_bytes)
.map_err(|_| CatRevErrorKind::CorruptedRevlog)?; .map_err(|_| CatRevErrorKind::CorruptedRevlog)?;
let file_rev = file_log.get_node_rev(&file_node)?; let file_rev = file_log.get_node_rev(&file_node)?;
let data = file_log.get_rev_data(file_rev)?; let data = file_log.get_rev_data(file_rev)?;
if data.starts_with(&METADATA_DELIMITER) {
let end_delimiter_position = data
[METADATA_DELIMITER.len()..]
.windows(METADATA_DELIMITER.len())
.position(|bytes| bytes == METADATA_DELIMITER);
if let Some(position) = end_delimiter_position {
let offset = METADATA_DELIMITER.len() * 2;
bytes.extend(data[position + offset..].iter());
}
} else {
bytes.extend(data); bytes.extend(data);
} }
} }
} }
}
Ok(bytes) Ok(bytes)
} else { } else {
unreachable!("manifest_entry should have been stored"); unreachable!("manifest_entry should have been stored");
} }
} }
} }

tests/test-rhg.t

0 0 0 0
file3 file3
commit 3 (no-eol) commit 3 (no-eol)
$ rhg debugdata -m 2 $ rhg debugdata -m 2
file1\x00b8e02f6433738021a065f94175c7cd23db5f05be (esc) file1\x00b8e02f6433738021a065f94175c7cd23db5f05be (esc)
file2\x005d9299349fc01ddd25d0070d149b124d8f10411e (esc) file2\x005d9299349fc01ddd25d0070d149b124d8f10411e (esc)
file3\x002661d26c649684b482d10f91960cc3db683c38b4 (esc) file3\x002661d26c649684b482d10f91960cc3db683c38b4 (esc)
Cat files
$ cd $TESTTMP
$ rm -rf repository
$ hg init repository
$ cd repository
$ echo "original content" > original
$ hg add original
$ hg commit -m "add original" original
$ rhg cat -r 0 original
original content
Cat copied file should not display copy metadata
$ hg copy original copy_of_original
$ hg commit -m "add copy of original"
$ rhg cat -r 1 copy_of_original
original content