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

obsolete: don't use os.stat in repo.obsstore.__nonzero__ if it's static HTTP...

obsolete: don't use os.stat in repo.obsstore.__nonzero__ if it's static HTTP If a repo is accessed via static HTTP, then we obviously can't use os.stat() to just peek at the file size. Let's download the entire file to check its size. Yes, this feels wasteful, but: 1. If we're cloning or pulling a repo from a static HTTP server, we need the contents of the obsstore anyway. 2. Implementing statichttpvfs.stat() that uses HEAD will result in one more request to a static-only HTTP server, which is already slow. Also parsing a response to a HEAD request to construct os.stat_result is pretty hacky. There's also a question of the remote server properly supporting HEAD method and reporting at least file size. 3. Implementing statichttpvfs.stat() that uses GET is pretty much the same thing as we do here, except we can't even cache the response easily, unlike simply accessing obsstore._data, which is @propertycache'd. Importing statichttprepo locally to avoid circular import. See also: and commit message of f8f2ecdde4b5. Differential Revision: https://phab.mercurial-scm.org/D12195

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             debugdata.rs
        
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        Antoine Cezar
    
hg-core: define a `DebugData` `Operation`...

              r46098
            
      // debugdata.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.

        Simon Sapin
    
rust: introduce Repo and Vfs types for filesystem abstraction...

              r46782
            
      use crate::repo::Repo;

        Antoine Cezar
    
hg-core: define a `DebugData` `Operation`...

              r46098
            
      use crate::revlog::revlog::{Revlog, RevlogError};

      /// Kind of data to debug

      #[derive(Debug, Copy, Clone)]

      pub enum DebugDataKind {

          Changelog,

          Manifest,

      }

      /// Dump the contents data of a revision.

        Simon Sapin
    
rust: replace most "operation" structs with functions...

              r46751
            
      pub fn debug_data(

        Simon Sapin
    
rust: introduce Repo and Vfs types for filesystem abstraction...

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          repo: &Repo,

        Simon Sapin
    
rhg: centralize parsing of `--rev` CLI arguments...

              r47162
            
          revset: &str,

        Antoine Cezar
    
hg-core: define a `DebugData` `Operation`...

              r46098
            
          kind: DebugDataKind,

        Simon Sapin
    
rust: remove three enums that were identical to `RevlogError`...

              r47166
            
      ) -> Result<Vec<u8>, RevlogError> {

        Simon Sapin
    
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              r46751
            
          let index_file = match kind {

        Simon Sapin
    
rust: introduce Repo and Vfs types for filesystem abstraction...

              r46782
            
              DebugDataKind::Changelog => "00changelog.i",

              DebugDataKind::Manifest => "00manifest.i",

        Simon Sapin
    
rust: replace most "operation" structs with functions...

              r46751
            
          };

        Simon Sapin
    
rust: introduce Repo and Vfs types for filesystem abstraction...

              r46782
            
          let revlog = Revlog::open(repo, index_file, None)?;

        Simon Sapin
    
rhg: centralize parsing of `--rev` CLI arguments...

              r47162
            
          let rev =

              crate::revset::resolve_rev_number_or_hex_prefix(revset, &revlog)?;

          let data = revlog.get_rev_data(rev)?;

        Simon Sapin
    
rhg: Add RevlogEntry::data that does delta resolution...

              r49373
            
          Ok(data.into_owned())

        Antoine Cezar
    
hg-core: define a `DebugData` `Operation`...

              r46098
            
      }

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Antoine Cezar hg-core: define a `DebugData` `Operation`...	r46098	// debugdata.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.

Simon Sapin rust: introduce Repo and Vfs types for filesystem abstraction...	r46782	use crate::repo::Repo;
Antoine Cezar hg-core: define a `DebugData` `Operation`...	r46098	use crate::revlog::revlog::{Revlog, RevlogError};

		/// Kind of data to debug
		#[derive(Debug, Copy, Clone)]
		pub enum DebugDataKind {
		Changelog,
		Manifest,
		}

		/// Dump the contents data of a revision.
Simon Sapin rust: replace most "operation" structs with functions...	r46751	pub fn debug_data(
Simon Sapin rust: introduce Repo and Vfs types for filesystem abstraction...	r46782	repo: &Repo,
Simon Sapin rhg: centralize parsing of `--rev` CLI arguments...	r47162	revset: &str,
Antoine Cezar hg-core: define a `DebugData` `Operation`...	r46098	kind: DebugDataKind,
Simon Sapin rust: remove three enums that were identical to `RevlogError`...	r47166	) -> Result<Vec<u8>, RevlogError> {
Simon Sapin rust: replace most "operation" structs with functions...	r46751	let index_file = match kind {
Simon Sapin rust: introduce Repo and Vfs types for filesystem abstraction...	r46782	DebugDataKind::Changelog => "00changelog.i",
		DebugDataKind::Manifest => "00manifest.i",
Simon Sapin rust: replace most "operation" structs with functions...	r46751	};
Simon Sapin rust: introduce Repo and Vfs types for filesystem abstraction...	r46782	let revlog = Revlog::open(repo, index_file, None)?;
Simon Sapin rhg: centralize parsing of `--rev` CLI arguments...	r47162	let rev =
		crate::revset::resolve_rev_number_or_hex_prefix(revset, &revlog)?;
		let data = revlog.get_rev_data(rev)?;
Simon Sapin rhg: Add RevlogEntry::data that does delta resolution...	r49373	Ok(data.into_owned())
Antoine Cezar hg-core: define a `DebugData` `Operation`...	r46098	}