Mercurial > public > mercurial-scm > hg

annotate rust/hg-core/src/revset.rs @ 47123:d8ac62374943

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
dirstate-tree: Make `DirstateMap` borrow from a bytes buffer ? that has the contents of the `.hg/dirstate` file. This only applies to the tree-based flavor of `DirstateMap`. For now only the entire `&[u8]` slice is stored, so this is not useful yet. Adding a lifetime parameter to the `DirstateMap` struct (in hg-core) makes Python bindings non-trivial because we keep that struct in a Python object that has a dynamic lifetime tied to Python?s reference-counting and GC. As long as we keep the `PyBytes` that owns the borrowed bytes buffer next to the borrowing struct, the buffer will live long enough for the borrows to stay valid. However this relationship cannot be expressed in safe Rust code in a way that would statisfy they borrow-checker. We use `unsafe` code to erase that lifetime parameter, and encapsulate it in a safe abstraction similar to the owning-ref crate: https://docs.rs/owning_ref/ Differential Revision: https://phab.mercurial-scm.org/D10557
author Simon Sapin <simon.sapin@octobus.net>
date Fri, 30 Apr 2021 18:24:54 +0200
parents e8ae91b1a63d
children 21d25e9ee58e
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
46433
4b381dbbf8b7 rhg: centralize parsing of `--rev` CLI arguments
Simon Sapin <simon.sapin@octobus.net>
parents:
diff changeset
1 //! The revset query language
4b381dbbf8b7 rhg: centralize parsing of `--rev` CLI arguments
Simon Sapin <simon.sapin@octobus.net>
parents:
diff changeset
2 //!
4b381dbbf8b7 rhg: centralize parsing of `--rev` CLI arguments
Simon Sapin <simon.sapin@octobus.net>
parents:
diff changeset
3 //! <https://www.mercurial-scm.org/repo/hg/help/revsets>
4b381dbbf8b7 rhg: centralize parsing of `--rev` CLI arguments
Simon Sapin <simon.sapin@octobus.net>
parents:
diff changeset
4
46725
df247f58ecee rhg: Fall back to Python for unsupported revset syntax
Simon Sapin <simon.sapin@octobus.net>
parents: 46433
diff changeset
5 use crate::errors::HgError;
46433
4b381dbbf8b7 rhg: centralize parsing of `--rev` CLI arguments
Simon Sapin <simon.sapin@octobus.net>
parents:
diff changeset
6 use crate::repo::Repo;
4b381dbbf8b7 rhg: centralize parsing of `--rev` CLI arguments
Simon Sapin <simon.sapin@octobus.net>
parents:
diff changeset
7 use crate::revlog::changelog::Changelog;
4b381dbbf8b7 rhg: centralize parsing of `--rev` CLI arguments
Simon Sapin <simon.sapin@octobus.net>
parents:
diff changeset
8 use crate::revlog::revlog::{Revlog, RevlogError};
4b381dbbf8b7 rhg: centralize parsing of `--rev` CLI arguments
Simon Sapin <simon.sapin@octobus.net>
parents:
diff changeset
9 use crate::revlog::NodePrefix;
46821
e8ae91b1a63d rhg: raise wdir specific error for `hg debugdata`
Pulkit Goyal <7895pulkit@gmail.com>
parents: 46725
diff changeset
10 use crate::revlog::{Revision, NULL_REVISION, WORKING_DIRECTORY_HEX};
e8ae91b1a63d rhg: raise wdir specific error for `hg debugdata`
Pulkit Goyal <7895pulkit@gmail.com>
parents: 46725
diff changeset
11 use crate::Node;
46433
4b381dbbf8b7 rhg: centralize parsing of `--rev` CLI arguments
Simon Sapin <simon.sapin@octobus.net>
parents:
diff changeset
12
4b381dbbf8b7 rhg: centralize parsing of `--rev` CLI arguments
Simon Sapin <simon.sapin@octobus.net>
parents:
diff changeset
13 /// Resolve a query string into a single revision.
4b381dbbf8b7 rhg: centralize parsing of `--rev` CLI arguments
Simon Sapin <simon.sapin@octobus.net>
parents:
diff changeset
14 ///
4b381dbbf8b7 rhg: centralize parsing of `--rev` CLI arguments
Simon Sapin <simon.sapin@octobus.net>
parents:
diff changeset
15 /// Only some of the revset language is implemented yet.
4b381dbbf8b7 rhg: centralize parsing of `--rev` CLI arguments
Simon Sapin <simon.sapin@octobus.net>
parents:
diff changeset
16 pub fn resolve_single(
4b381dbbf8b7 rhg: centralize parsing of `--rev` CLI arguments
Simon Sapin <simon.sapin@octobus.net>
parents:
diff changeset
17 input: &str,
4b381dbbf8b7 rhg: centralize parsing of `--rev` CLI arguments
Simon Sapin <simon.sapin@octobus.net>
parents:
diff changeset
18 repo: &Repo,
4b381dbbf8b7 rhg: centralize parsing of `--rev` CLI arguments
Simon Sapin <simon.sapin@octobus.net>
parents:
diff changeset
19 ) -> Result<Revision, RevlogError> {
4b381dbbf8b7 rhg: centralize parsing of `--rev` CLI arguments
Simon Sapin <simon.sapin@octobus.net>
parents:
diff changeset
20 let changelog = Changelog::open(repo)?;
4b381dbbf8b7 rhg: centralize parsing of `--rev` CLI arguments
Simon Sapin <simon.sapin@octobus.net>
parents:
diff changeset
21
4b381dbbf8b7 rhg: centralize parsing of `--rev` CLI arguments
Simon Sapin <simon.sapin@octobus.net>
parents:
diff changeset
22 match resolve_rev_number_or_hex_prefix(input, &changelog.revlog) {
4b381dbbf8b7 rhg: centralize parsing of `--rev` CLI arguments
Simon Sapin <simon.sapin@octobus.net>
parents:
diff changeset
23 Err(RevlogError::InvalidRevision) => {} // Try other syntax
4b381dbbf8b7 rhg: centralize parsing of `--rev` CLI arguments
Simon Sapin <simon.sapin@octobus.net>
parents:
diff changeset
24 result => return result,
4b381dbbf8b7 rhg: centralize parsing of `--rev` CLI arguments
Simon Sapin <simon.sapin@octobus.net>
parents:
diff changeset
25 }
4b381dbbf8b7 rhg: centralize parsing of `--rev` CLI arguments
Simon Sapin <simon.sapin@octobus.net>
parents:
diff changeset
26
4b381dbbf8b7 rhg: centralize parsing of `--rev` CLI arguments
Simon Sapin <simon.sapin@octobus.net>
parents:
diff changeset
27 if input == "null" {
4b381dbbf8b7 rhg: centralize parsing of `--rev` CLI arguments
Simon Sapin <simon.sapin@octobus.net>
parents:
diff changeset
28 return Ok(NULL_REVISION);
4b381dbbf8b7 rhg: centralize parsing of `--rev` CLI arguments
Simon Sapin <simon.sapin@octobus.net>
parents:
diff changeset
29 }
4b381dbbf8b7 rhg: centralize parsing of `--rev` CLI arguments
Simon Sapin <simon.sapin@octobus.net>
parents:
diff changeset
30
4b381dbbf8b7 rhg: centralize parsing of `--rev` CLI arguments
Simon Sapin <simon.sapin@octobus.net>
parents:
diff changeset
31 // TODO: support for the rest of the language here.
4b381dbbf8b7 rhg: centralize parsing of `--rev` CLI arguments
Simon Sapin <simon.sapin@octobus.net>
parents:
diff changeset
32
46725
df247f58ecee rhg: Fall back to Python for unsupported revset syntax
Simon Sapin <simon.sapin@octobus.net>
parents: 46433
diff changeset
33 Err(
df247f58ecee rhg: Fall back to Python for unsupported revset syntax
Simon Sapin <simon.sapin@octobus.net>
parents: 46433
diff changeset
34 HgError::unsupported(format!("cannot parse revset '{}'", input))
df247f58ecee rhg: Fall back to Python for unsupported revset syntax
Simon Sapin <simon.sapin@octobus.net>
parents: 46433
diff changeset
35 .into(),
df247f58ecee rhg: Fall back to Python for unsupported revset syntax
Simon Sapin <simon.sapin@octobus.net>
parents: 46433
diff changeset
36 )
46433
4b381dbbf8b7 rhg: centralize parsing of `--rev` CLI arguments
Simon Sapin <simon.sapin@octobus.net>
parents:
diff changeset
37 }
4b381dbbf8b7 rhg: centralize parsing of `--rev` CLI arguments
Simon Sapin <simon.sapin@octobus.net>
parents:
diff changeset
38
4b381dbbf8b7 rhg: centralize parsing of `--rev` CLI arguments
Simon Sapin <simon.sapin@octobus.net>
parents:
diff changeset
39 /// Resolve the small subset of the language suitable for revlogs other than
4b381dbbf8b7 rhg: centralize parsing of `--rev` CLI arguments
Simon Sapin <simon.sapin@octobus.net>
parents:
diff changeset
40 /// the changelog, such as in `hg debugdata --manifest` CLI argument.
4b381dbbf8b7 rhg: centralize parsing of `--rev` CLI arguments
Simon Sapin <simon.sapin@octobus.net>
parents:
diff changeset
41 ///
4b381dbbf8b7 rhg: centralize parsing of `--rev` CLI arguments
Simon Sapin <simon.sapin@octobus.net>
parents:
diff changeset
42 /// * A non-negative decimal integer for a revision number, or
4b381dbbf8b7 rhg: centralize parsing of `--rev` CLI arguments
Simon Sapin <simon.sapin@octobus.net>
parents:
diff changeset
43 /// * An hexadecimal string, for the unique node ID that starts with this
4b381dbbf8b7 rhg: centralize parsing of `--rev` CLI arguments
Simon Sapin <simon.sapin@octobus.net>
parents:
diff changeset
44 /// prefix
4b381dbbf8b7 rhg: centralize parsing of `--rev` CLI arguments
Simon Sapin <simon.sapin@octobus.net>
parents:
diff changeset
45 pub fn resolve_rev_number_or_hex_prefix(
4b381dbbf8b7 rhg: centralize parsing of `--rev` CLI arguments
Simon Sapin <simon.sapin@octobus.net>
parents:
diff changeset
46 input: &str,
4b381dbbf8b7 rhg: centralize parsing of `--rev` CLI arguments
Simon Sapin <simon.sapin@octobus.net>
parents:
diff changeset
47 revlog: &Revlog,
4b381dbbf8b7 rhg: centralize parsing of `--rev` CLI arguments
Simon Sapin <simon.sapin@octobus.net>
parents:
diff changeset
48 ) -> Result<Revision, RevlogError> {
4b381dbbf8b7 rhg: centralize parsing of `--rev` CLI arguments
Simon Sapin <simon.sapin@octobus.net>
parents:
diff changeset
49 if let Ok(integer) = input.parse::<i32>() {
4b381dbbf8b7 rhg: centralize parsing of `--rev` CLI arguments
Simon Sapin <simon.sapin@octobus.net>
parents:
diff changeset
50 if integer >= 0 && revlog.has_rev(integer) {
4b381dbbf8b7 rhg: centralize parsing of `--rev` CLI arguments
Simon Sapin <simon.sapin@octobus.net>
parents:
diff changeset
51 return Ok(integer);
4b381dbbf8b7 rhg: centralize parsing of `--rev` CLI arguments
Simon Sapin <simon.sapin@octobus.net>
parents:
diff changeset
52 }
4b381dbbf8b7 rhg: centralize parsing of `--rev` CLI arguments
Simon Sapin <simon.sapin@octobus.net>
parents:
diff changeset
53 }
4b381dbbf8b7 rhg: centralize parsing of `--rev` CLI arguments
Simon Sapin <simon.sapin@octobus.net>
parents:
diff changeset
54 if let Ok(prefix) = NodePrefix::from_hex(input) {
46821
e8ae91b1a63d rhg: raise wdir specific error for `hg debugdata`
Pulkit Goyal <7895pulkit@gmail.com>
parents: 46725
diff changeset
55 if prefix.is_prefix_of(&Node::from_hex(WORKING_DIRECTORY_HEX).unwrap())
e8ae91b1a63d rhg: raise wdir specific error for `hg debugdata`
Pulkit Goyal <7895pulkit@gmail.com>
parents: 46725
diff changeset
56 {
e8ae91b1a63d rhg: raise wdir specific error for `hg debugdata`
Pulkit Goyal <7895pulkit@gmail.com>
parents: 46725
diff changeset
57 return Err(RevlogError::WDirUnsupported);
e8ae91b1a63d rhg: raise wdir specific error for `hg debugdata`
Pulkit Goyal <7895pulkit@gmail.com>
parents: 46725
diff changeset
58 }
46433
4b381dbbf8b7 rhg: centralize parsing of `--rev` CLI arguments
Simon Sapin <simon.sapin@octobus.net>
parents:
diff changeset
59 return revlog.get_node_rev(prefix);
4b381dbbf8b7 rhg: centralize parsing of `--rev` CLI arguments
Simon Sapin <simon.sapin@octobus.net>
parents:
diff changeset
60 }
4b381dbbf8b7 rhg: centralize parsing of `--rev` CLI arguments
Simon Sapin <simon.sapin@octobus.net>
parents:
diff changeset
61 Err(RevlogError::InvalidRevision)
4b381dbbf8b7 rhg: centralize parsing of `--rev` CLI arguments
Simon Sapin <simon.sapin@octobus.net>
parents:
diff changeset
62 }