D5434: rust-cpython: started cpython crate bindings
gracinet (Georges Racinet)
phabricator at mercurial-scm.org
Sat Dec 15 22:31:26 EST 2018
This revision was automatically updated to reflect the committed changes.
Closed by commit rHGa3ba080b3118: rust-cpython: start cpython crate bindings (authored by gracinet, committed by ).
CHANGED PRIOR TO COMMIT
https://phab.mercurial-scm.org/D5434?vs=12871&id=12883#toc
REPOSITORY
rHG Mercurial
CHANGES SINCE LAST UPDATE
https://phab.mercurial-scm.org/D5434?vs=12871&id=12883
REVISION DETAIL
https://phab.mercurial-scm.org/D5434
AFFECTED FILES
rust/Cargo.lock
rust/Cargo.toml
rust/hg-cpython/Cargo.toml
rust/hg-cpython/rustfmt.toml
rust/hg-cpython/src/ancestors.rs
rust/hg-cpython/src/exceptions.rs
rust/hg-cpython/src/lib.rs
CHANGE DETAILS
diff --git a/rust/hg-cpython/src/lib.rs b/rust/hg-cpython/src/lib.rs
new file mode 100644
--- /dev/null
+++ b/rust/hg-cpython/src/lib.rs
@@ -0,0 +1,40 @@
+// lib.rs
+//
+// Copyright 2018 Georges Racinet <gracinet at anybox.fr>
+//
+// 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:
+//! ```
+//! >>> from mercurial.rustext import ancestor
+//! >>> ancestor.__doc__
+//! 'Generic DAG ancestor algorithms - Rust implementation'
+//! ```
+
+#[macro_use]
+extern crate cpython;
+extern crate hg;
+
+mod ancestors;
+mod exceptions;
+
+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, "__package__", "mercurial")?;
+ m.add(py, "ancestor", ancestors::init_module(py, &dotted_name)?)?;
+ m.add(py, "GraphError", py.get_type::<exceptions::GraphError>())?;
+ Ok(())
+});
diff --git a/rust/hg-cpython/src/exceptions.rs b/rust/hg-cpython/src/exceptions.rs
new file mode 100644
--- /dev/null
+++ b/rust/hg-cpython/src/exceptions.rs
@@ -0,0 +1,15 @@
+use cpython::exc::ValueError;
+use cpython::{PyErr, Python};
+use hg;
+
+py_exception!(rustext, GraphError, ValueError);
+
+impl GraphError {
+ pub fn pynew(py: Python, inner: hg::GraphError) -> PyErr {
+ match inner {
+ hg::GraphError::ParentOutOfRange(r) => {
+ GraphError::new(py, ("ParentOutOfRange", r))
+ }
+ }
+ }
+}
diff --git a/rust/hg-cpython/src/ancestors.rs b/rust/hg-cpython/src/ancestors.rs
new file mode 100644
--- /dev/null
+++ b/rust/hg-cpython/src/ancestors.rs
@@ -0,0 +1,30 @@
+// ancestors.rs
+//
+// Copyright 2018 Georges Racinet <gracinet at anybox.fr>
+//
+// This software may be used and distributed according to the terms of the
+// GNU General Public License version 2 or any later version.
+
+//! Bindings for the hg::ancestors module provided by the
+//! `hg-core` crate. From Python, this will be seen as `rustext.ancestor`
+use cpython::{PyDict, PyModule, PyResult, Python};
+
+/// Create the module, with __package__ given from parent
+pub fn init_module(py: Python, package: &str) -> PyResult<PyModule> {
+ let dotted_name = &format!("{}.ancestor", package);
+ let m = PyModule::new(py, dotted_name)?;
+ m.add(py, "__package__", package)?;
+ m.add(
+ py,
+ "__doc__",
+ "Generic DAG ancestor algorithms - Rust implementation",
+ )?;
+
+ let sys = PyModule::import(py, "sys")?;
+ let sys_modules: PyDict = sys.get(py, "modules")?.extract(py)?;
+ sys_modules.set_item(py, dotted_name, &m)?;
+ // Example C code (see pyexpat.c and import.c) will "give away the
+ // reference", but we won't because it will be consumed once the
+ // Rust PyObject is dropped.
+ Ok(m)
+}
diff --git a/rust/hg-cpython/rustfmt.toml b/rust/hg-cpython/rustfmt.toml
new file mode 100644
--- /dev/null
+++ b/rust/hg-cpython/rustfmt.toml
@@ -0,0 +1,3 @@
+max_width = 79
+wrap_comments = true
+error_on_line_overflow = true
diff --git a/rust/hg-cpython/Cargo.toml b/rust/hg-cpython/Cargo.toml
new file mode 100644
--- /dev/null
+++ b/rust/hg-cpython/Cargo.toml
@@ -0,0 +1,29 @@
+[package]
+name = "hg-cpython"
+version = "0.1.0"
+authors = ["Georges Racinet <gracinet at anybox.fr>"]
+
+[lib]
+name='rusthg'
+crate-type = ["cdylib"]
+
+[features]
+default = ["python27", "python27-sys"]
+
+python27 = ["cpython/python27-sys", "cpython/extension-module-2-7"]
+
+[dependencies]
+hg-core = { path = "../hg-core" }
+libc = '*'
+
+[dependencies.cpython]
+version = "*"
+default-features = false
+
+[dependencies.python27-sys]
+version = "0.2.1"
+optional = true
+
+[dependencies.python3-sys]
+version = "0.2.1"
+optional = true
diff --git a/rust/Cargo.toml b/rust/Cargo.toml
--- a/rust/Cargo.toml
+++ b/rust/Cargo.toml
@@ -1,3 +1,3 @@
[workspace]
-members = ["hg-core", "hg-direct-ffi"]
+members = ["hg-core", "hg-direct-ffi", "hg-cpython"]
exclude = ["chg", "hgcli"]
diff --git a/rust/Cargo.lock b/rust/Cargo.lock
--- a/rust/Cargo.lock
+++ b/rust/Cargo.lock
@@ -1,19 +1,148 @@
+[[package]]
+name = "aho-corasick"
+version = "0.6.9"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "memchr 2.1.2 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "cfg-if"
+version = "0.1.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
+[[package]]
+name = "cpython"
+version = "0.2.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "libc 0.2.45 (registry+https://github.com/rust-lang/crates.io-index)",
+ "num-traits 0.2.6 (registry+https://github.com/rust-lang/crates.io-index)",
+ "python27-sys 0.2.1 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
[[package]]
name = "hg-core"
version = "0.1.0"
[[package]]
+name = "hg-cpython"
+version = "0.1.0"
+dependencies = [
+ "cpython 0.2.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "hg-core 0.1.0",
+ "libc 0.2.45 (registry+https://github.com/rust-lang/crates.io-index)",
+ "python27-sys 0.2.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "python3-sys 0.2.1 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
name = "hgdirectffi"
version = "0.1.0"
dependencies = [
"hg-core 0.1.0",
"libc 0.2.45 (registry+https://github.com/rust-lang/crates.io-index)",
]
[[package]]
+name = "lazy_static"
+version = "1.2.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
+[[package]]
name = "libc"
version = "0.2.45"
source = "registry+https://github.com/rust-lang/crates.io-index"
+[[package]]
+name = "memchr"
+version = "2.1.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "cfg-if 0.1.6 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libc 0.2.45 (registry+https://github.com/rust-lang/crates.io-index)",
+ "version_check 0.1.5 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "num-traits"
+version = "0.2.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
+[[package]]
+name = "python27-sys"
+version = "0.2.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "libc 0.2.45 (registry+https://github.com/rust-lang/crates.io-index)",
+ "regex 1.1.0 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "python3-sys"
+version = "0.2.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "libc 0.2.45 (registry+https://github.com/rust-lang/crates.io-index)",
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+dependencies = [
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+ "memchr 2.1.2 (registry+https://github.com/rust-lang/crates.io-index)",
+ "regex-syntax 0.6.4 (registry+https://github.com/rust-lang/crates.io-index)",
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+
+[[package]]
+name = "regex-syntax"
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+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "ucd-util 0.1.3 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "thread_local"
+version = "0.3.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "lazy_static 1.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "ucd-util"
+version = "0.1.3"
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+
+[[package]]
+name = "utf8-ranges"
+version = "1.0.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
+[[package]]
+name = "version_check"
+version = "0.1.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
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