upstream/mercurial-mirror Files · rust/chg/src/lib.rs

rust: pure Rust lazyancestors iterator...

rust: pure Rust lazyancestors iterator This is the first of a patch series aiming to provide an alternative implementation in the Rust programming language of the _lazyancestorsiter from the ancestor module. This iterator has been brought to our attention by the people at Octobus, as a potential good candidate for incremental "oxydation" (rewriting in Rust), because it has shown performance issues lately and it merely deals with ints (revision numbers) obtained by calling the index, whih should be directly callable from Rust code, being itself implemented as a C extension. The idea behind this series is to provide a minimal example of Rust code collaborating with existing C and Python code. To open the way to gradually rewriting more of Mercurial's Python code in Rust, without being forced to pay a large initial cost of rewriting the existing fast core into Rust. This patch does not introduce any bindings to other Mercurial code yet. Instead, it introduces the necessary abstractions to address the problem independently, and unit-test it. Since this is the first use of Rust as a Python module within Mercurial, the hg-core crate gets created within this patch. See its Cargo.toml for more details. Someone with a rustc/cargo installation may chdir into rust/hg-core and run the tests by issuing: cargo test --lib The algorithm is a bit simplified (see details in docstrings), and at its simplest becomes rather trivial, showcasing that Rust has batteries included too: BinaryHeap, the Rust analog of Python's heapq does actually all the work. The implementation can be further optimized and probably be made more idiomatic Rust.

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        Yuya Nishihara
    
rust-chg: add wrapper around C function

              r40006
            
      // Copyright 2018 Yuya Nishihara <yuya@tcha.org>

      //

      // This software may be used and distributed according to the terms of the

      // GNU General Public License version 2 or any later version.

        Yuya Nishihara
    
rust-chg: add parser for request messages sent to "S" channel...

              r40007
            
      extern crate bytes;

        Yuya Nishihara
    
rust-chg: add future that handles "attachio" request...

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      #[macro_use]

      extern crate futures;

        Yuya Nishihara
    
rust-chg: add wrapper around C function

              r40006
            
      extern crate libc;

        Yuya Nishihara
    
rust-chg: add future that handles "attachio" request...

              r40008
            
      extern crate tokio;

        Yuya Nishihara
    
rust-chg: add parser for request messages sent to "S" channel...

              r40007
            
      extern crate tokio_hglib;

        Yuya Nishihara
    
rust-chg: add callback to handle pager and shell command requests...

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      extern crate tokio_process;

        Yuya Nishihara
    
rust-chg: add wrapper around C function

              r40006
            
        Yuya Nishihara
    
rust-chg: add Client extensions to run cHg-specific requests...

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      mod attachio;

      mod clientext;

        Yuya Nishihara
    
rust-chg: port basic socket path handling from cHg of C...

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      pub mod locator;

        Yuya Nishihara
    
rust-chg: add parser for request messages sent to "S" channel...

              r40007
            
      pub mod message;

        Yuya Nishihara
    
rust-chg: add wrapper around C function

              r40006
            
      pub mod procutil;

        Yuya Nishihara
    
rust-chg: add Client extensions to run cHg-specific requests...

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      mod runcommand;

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rust-chg: add callback to handle pager and shell command requests...

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      mod uihandler;

        Yuya Nishihara
    
rust-chg: add Client extensions to run cHg-specific requests...

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      pub use clientext::ChgClientExt;

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rust-chg: add callback to handle pager and shell command requests...

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      pub use uihandler::{ChgUiHandler, SystemHandler};

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Yuya Nishihara rust-chg: add wrapper around C function	r40006	// Copyright 2018 Yuya Nishihara <yuya@tcha.org>
		//
		// This software may be used and distributed according to the terms of the
		// GNU General Public License version 2 or any later version.

Yuya Nishihara rust-chg: add parser for request messages sent to "S" channel...	r40007	extern crate bytes;
Yuya Nishihara rust-chg: add future that handles "attachio" request...	r40008	#[macro_use]
		extern crate futures;
Yuya Nishihara rust-chg: add wrapper around C function	r40006	extern crate libc;
Yuya Nishihara rust-chg: add future that handles "attachio" request...	r40008	extern crate tokio;
Yuya Nishihara rust-chg: add parser for request messages sent to "S" channel...	r40007	extern crate tokio_hglib;
Yuya Nishihara rust-chg: add callback to handle pager and shell command requests...	r40010	extern crate tokio_process;
Yuya Nishihara rust-chg: add wrapper around C function	r40006
Yuya Nishihara rust-chg: add Client extensions to run cHg-specific requests...	r40013	mod attachio;
		mod clientext;
Yuya Nishihara rust-chg: port basic socket path handling from cHg of C...	r40012	pub mod locator;
Yuya Nishihara rust-chg: add parser for request messages sent to "S" channel...	r40007	pub mod message;
Yuya Nishihara rust-chg: add wrapper around C function	r40006	pub mod procutil;
Yuya Nishihara rust-chg: add Client extensions to run cHg-specific requests...	r40013	mod runcommand;
Yuya Nishihara rust-chg: add callback to handle pager and shell command requests...	r40010	mod uihandler;

Yuya Nishihara rust-chg: add Client extensions to run cHg-specific requests...	r40013	pub use clientext::ChgClientExt;
Yuya Nishihara rust-chg: add callback to handle pager and shell command requests...	r40010	pub use uihandler::{ChgUiHandler, SystemHandler};