upstream/mercurial-mirror Files · rust/hg-core/src/dirstate.rs

dirstate: invalidate changes when parent-change fails...

dirstate: invalidate changes when parent-change fails When an error occurs during changing parents, we should invalidate all dirstate modifications and reload the dirstate. This is currently done by a `unlock` callback on the `wlock`. To fix this anomaly, we start dealing with the error directly in the context manager and its potential nesting. The "hard" part is to make sure that, when the parent-change context are nested, we and higher level nesting do not continue to use the invalidated dirstate. We introduce dedicated code to enforce that.

Raphaël Gomès - - Load All Authors

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             dirstate.rs
        
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                | application/rls-services+xml
            
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             / rust / hg-core / src / dirstate.rs
          
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      // dirstate module

      //

      // Copyright 2019 Raphaël Gomès <rgomes@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::dirstate_tree::on_disk::DirstateV2ParseError;

      use crate::revlog::node::NULL_NODE;

      use crate::revlog::Node;

      use crate::utils::hg_path::HgPath;

      use bytes_cast::BytesCast;

      pub mod dirs_multiset;

      pub mod entry;

      pub mod parsers;

      pub mod status;

      pub use self::entry::*;

      #[derive(Debug, PartialEq, Copy, Clone, BytesCast)]

      #[repr(C)]

      pub struct DirstateParents {

          pub p1: Node,

          pub p2: Node,

      }

      impl DirstateParents {

          pub const NULL: Self = Self {

              p1: NULL_NODE,

              p2: NULL_NODE,

          };

          pub fn is_merge(&self) -> bool {

              !(self.p2 == NULL_NODE)

          }

      }

      pub type StateMapIter<'a> = Box<

          dyn Iterator<

                  Item = Result<(&'a HgPath, DirstateEntry), DirstateV2ParseError>,

              > + Send

              + 'a,

      >;

      pub type CopyMapIter<'a> = Box<

          dyn Iterator<Item = Result<(&'a HgPath, &'a HgPath), DirstateV2ParseError>>

              + Send

              + 'a,

      >;

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				// dirstate module
				//
				// Copyright 2019 Raphaël Gomès <rgomes@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::dirstate_tree::on_disk::DirstateV2ParseError;
				use crate::revlog::node::NULL_NODE;
				use crate::revlog::Node;
				use crate::utils::hg_path::HgPath;
				use bytes_cast::BytesCast;

				pub mod dirs_multiset;
				pub mod entry;
				pub mod parsers;
				pub mod status;

				pub use self::entry::*;

				#[derive(Debug, PartialEq, Copy, Clone, BytesCast)]
				#[repr(C)]
				pub struct DirstateParents {
				pub p1: Node,
				pub p2: Node,
				}

				impl DirstateParents {
				pub const NULL: Self = Self {
				p1: NULL_NODE,
				p2: NULL_NODE,
				};

				pub fn is_merge(&self) -> bool {
				!(self.p2 == NULL_NODE)
				}
				}

				pub type StateMapIter<'a> = Box<
				dyn Iterator<
				Item = Result<(&'a HgPath, DirstateEntry), DirstateV2ParseError>,
				> + Send
				+ 'a,
				>;

				pub type CopyMapIter<'a> = Box<
				dyn Iterator<Item = Result<(&'a HgPath, &'a HgPath), DirstateV2ParseError>>
				+ Send
				+ 'a,
				>;