rust-cpython: start cpython crate bindings This changeset introduces the hg-cpython crate, that compiles as a shared library holding a whole Python package (mercurial.rustext), with only the empty 'ancestor' submodule for now. Such bindings will be easier and safer to develop and maintain that those of `hg-direct-ffi`. They don't involve C code, only unsafe Rust that's mostly isolated within the cpython crate. The long-term goal would be to import the provided modules, such as rustext.ancestor with mercurial.policy.importmod, same as we already do with cext modules. Differential Revision: https://phab.mercurial-scm.org/D5434

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[package]

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name = "hg-cpython"

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version = "0.1.0"

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authors = ["Georges Racinet <gracinet@anybox.fr>"]

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[lib]

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name='rusthg'

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crate-type = ["cdylib"]

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[features]

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default = ["python27", "python27-sys"]

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python27 = ["cpython/python27-sys", "cpython/extension-module-2-7"]

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[dependencies]

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hg-core = { path = "../hg-core" }

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libc = '*'

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[dependencies.cpython]

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version = "*"

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default-features = false

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[dependencies.python27-sys]

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version = "0.2.1"

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optional = true

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[dependencies.python3-sys]

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version = "0.2.1"

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optional = true