contrib/vagrant/Vagrantfile
author Raphaël Gomès <rgomes@octobus.net>
Tue, 09 Jul 2019 15:15:54 +0200
changeset 42768 30320c7bf79f
parent 26140 a31ffc445f02
child 43557 7fd16ddabaa0
permissions -rw-r--r--
rust-cpython: add macro for sharing references Following an experiment done by Georges Racinet, we now have a working way of sharing references between Python and Rust. This is needed in many points of the codebase, for example every time we need to expose an iterator to a Rust-backed Python class. In a few words, references are (unsafely) marked as `'static` and coupled with manual reference counting; we are doing manual borrow-checking. This changes introduces two declarative macro to help reduce boilerplate. While it is better than not using macros, they are not perfect. They need to: - Integrate with the garbage collector for container types (not needed as of yet), as stated in the docstring - Allow for leaking multiple attributes at the same time - Inject the `py_shared_state` data attribute in `py_class`-generated structs - Automatically namespace the functions and attributes they generate For at least the last two points, we will need to write a procedural macro instead of a declarative one. While this reference-sharing mechanism is being ironed out I thought it best not to implement it yet. Lastly, and implementation detail renders our Rust-backed Python iterators too strict to be proper drop-in replacements, as will be illustrated in a future patch: if the data structure referenced by a non-depleted iterator is mutated, an `AlreadyBorrowed` exception is raised, whereas Python would allow it, only to raise a `RuntimeError` if `next` is called on said iterator. This will have to be addressed at some point. Differential Revision: https://phab.mercurial-scm.org/D6631

# -*- mode: ruby -*-

Vagrant.configure('2') do |config|
  # Debian 8.1 x86_64 without configuration management software
  config.vm.box = "debian/jessie64"
  config.vm.hostname = "tests"

  config.vm.define "tests" do |conf|
    conf.vm.provision :file, source: "run-tests.sh", destination:"run-tests.sh"
    conf.vm.provision :shell, path: "provision.sh"
    conf.vm.synced_folder "../..", "/hgshared"
  end
end