rust: jettison Python 2 support

Differential Revision: https://phab.mercurial-scm.org/D12283

rust/Cargo.lock

@@ -1,1153 +1,1142
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rust/hg-cpython/Cargo.toml

@@ -1,32 +1,29
 [package]
 name = "hg-cpython"
 version = "0.1.0"
 authors = ["Georges Racinet <[e-mail]>"]
 edition = "2018"
 
 [lib]
 name='rusthg'
 crate-type = ["cdylib"]
 
 [features]
 default = ["python3"]
 
 # Features to build an extension module:
-python27 = ["cpython/python27-sys", "cpython/extension-module-2-7"]
 python3 = ["cpython/python3-sys", "cpython/extension-module"]
 
-# Enable one of these features to build a test executable linked to libpython:
-# e.g. cargo test --no-default-features --features python27-bin
-python27-bin = ["cpython/python27-sys"]
+# Enable this feature to build a test executable linked to libpython:
+# e.g. cargo test --no-default-features --features python3-bin
 python3-bin = ["cpython/python3-sys"]
 
 [dependencies]
 cpython = { version = "0.7.0", default-features = false }
 crossbeam-channel = "0.4"
 hg-core = { path = "../hg-core"}
 libc = "0.2"
 log = "0.4.8"
 env_logger = "0.7.1"
 stable_deref_trait = "1.2.0"
 vcsgraph = "0.2.0"
-

rust/hg-cpython/src/lib.rs

@@ -1,70 +1,70
 // lib.rs
 //
 // Copyright 2018 Georges Racinet <[e-mail]>
 //
 // This software may be used and distributed according to the terms of the
 // GNU General Public License version 2 or any later version.
 
 //! Python bindings of `hg-core` objects using the `cpython` crate.
 //! Once compiled, the resulting single shared library object can be placed in
 //! the `mercurial` package directly as `rustext.so` or `rustext.dll`.
 //! It holds several modules, so that from the point of view of Python,
 //! it behaves as the `cext` package.
 //!
 //! Example:
 //!
 //! ```text
 //! >>> from mercurial.rustext import ancestor
 //! >>> ancestor.__doc__
 //! 'Generic DAG ancestor algorithms - Rust implementation'
 //! ```
 
 /// This crate uses nested private macros, `extern crate` is still needed in
 /// 2018 edition.
 #[macro_use]
 extern crate cpython;
 
 pub mod ancestors;
 mod cindex;
 mod conversion;
 #[macro_use]
 pub mod ref_sharing;
 pub mod copy_tracing;
 pub mod dagops;
 pub mod debug;
 pub mod dirstate;
 pub mod discovery;
 pub mod exceptions;
 mod pybytes_deref;
 pub mod revlog;
 pub mod utils;
 
 py_module_initializer!(rustext, initrustext, PyInit_rustext, |py, m| {
     m.add(
         py,
         "__doc__",
         "Mercurial core concepts - Rust implementation",
     )?;
 
     let dotted_name: String = m.get(py, "__name__")?.extract(py)?;
     m.add(py, "ancestor", ancestors::init_module(py, &dotted_name)?)?;
     m.add(py, "dagop", dagops::init_module(py, &dotted_name)?)?;
     m.add(py, "debug", debug::init_module(py, &dotted_name)?)?;
     m.add(
         py,
         "copy_tracing",
         copy_tracing::init_module(py, &dotted_name)?,
     )?;
     m.add(py, "discovery", discovery::init_module(py, &dotted_name)?)?;
     m.add(py, "dirstate", dirstate::init_module(py, &dotted_name)?)?;
     m.add(py, "revlog", revlog::init_module(py, &dotted_name)?)?;
     m.add(py, "GraphError", py.get_type::<exceptions::GraphError>())?;
     Ok(())
 });
 
-#[cfg(not(any(feature = "python27-bin", feature = "python3-bin")))]
+#[cfg(not(feature = "python3-bin"))]
 #[test]
 #[ignore]
 fn libpython_must_be_linked_to_run_tests() {
     // stub function to tell that some tests wouldn't run
 }