Add initial platform module.

Cargo.lock

@@ -701,6 +701,23 @@ name = "rustc-demangle"
 version = "0.1.9"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
+[[package]]
+name = "rustc_version"
+version = "0.2.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "semver 0.9.0 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "rustc_version_runtime"
+version = "0.1.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "rustc_version 0.2.3 (registry+https://github.com/rust-lang/crates.io-index)",
+ "semver 0.9.0 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
 [[package]]
 name = "rustpython"
 version = "0.0.1"
@@ -742,6 +759,7 @@ dependencies = [
  "num-traits 0.2.6 (registry+https://github.com/rust-lang/crates.io-index)",
  "rand 0.5.5 (registry+https://github.com/rust-lang/crates.io-index)",
  "regex 1.0.3 (registry+https://github.com/rust-lang/crates.io-index)",
+ "rustc_version_runtime 0.1.5 (registry+https://github.com/rust-lang/crates.io-index)",
  "rustpython_parser 0.0.1",
  "serde 1.0.66 (registry+https://github.com/rust-lang/crates.io-index)",
  "serde_derive 1.0.66 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -790,6 +808,19 @@ name = "scoped_threadpool"
 version = "0.1.9"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
+[[package]]
+name = "semver"
+version = "0.9.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "semver-parser 0.7.0 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "semver-parser"
+version = "0.7.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
 [[package]]
 name = "serde"
 version = "1.0.66"
@@ -1277,9 +1308,13 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 "checksum regex-syntax 0.5.6 (registry+https://github.com/rust-lang/crates.io-index)" = "7d707a4fa2637f2dca2ef9fd02225ec7661fe01a53623c1e6515b6916511f7a7"
 "checksum regex-syntax 0.6.0 (registry+https://github.com/rust-lang/crates.io-index)" = "8f1ac0f60d675cc6cf13a20ec076568254472551051ad5dd050364d70671bf6b"
 "checksum rustc-demangle 0.1.9 (registry+https://github.com/rust-lang/crates.io-index)" = "bcfe5b13211b4d78e5c2cadfebd7769197d95c639c35a50057eb4c05de811395"
+"checksum rustc_version 0.2.3 (registry+https://github.com/rust-lang/crates.io-index)" = "138e3e0acb6c9fb258b19b67cb8abd63c00679d2851805ea151465464fe9030a"
+"checksum rustc_version_runtime 0.1.5 (registry+https://github.com/rust-lang/crates.io-index)" = "6de8ecd7fad7731f306f69b6e10ec5a3178c61e464dcc06979427aa4cc891145"
 "checksum rustyline 2.1.0 (registry+https://github.com/rust-lang/crates.io-index)" = "6010155119d53aac4f5b987cb8f6ea913d0d64d9b237da36f8f96a90cb3f5385"
 "checksum ryu 0.2.7 (registry+https://github.com/rust-lang/crates.io-index)" = "eb9e9b8cde282a9fe6a42dd4681319bfb63f121b8a8ee9439c6f4107e58a46f7"
 "checksum scoped_threadpool 0.1.9 (registry+https://github.com/rust-lang/crates.io-index)" = "1d51f5df5af43ab3f1360b429fa5e0152ac5ce8c0bd6485cae490332e96846a8"
+"checksum semver 0.9.0 (registry+https://github.com/rust-lang/crates.io-index)" = "1d7eb9ef2c18661902cc47e535f9bc51b78acd254da71d375c2f6720d9a40403"
+"checksum semver-parser 0.7.0 (registry+https://github.com/rust-lang/crates.io-index)" = "388a1df253eca08550bef6c72392cfe7c30914bf41df5269b68cbd6ff8f570a3"
 "checksum serde 1.0.66 (registry+https://github.com/rust-lang/crates.io-index)" = "e9a2d9a9ac5120e0f768801ca2b58ad6eec929dc9d1d616c162f208869c2ce95"
 "checksum serde_derive 1.0.66 (registry+https://github.com/rust-lang/crates.io-index)" = "0a90213fa7e0f5eac3f7afe2d5ff6b088af515052cc7303bd68c7e3b91a3fb79"
 "checksum serde_json 1.0.26 (registry+https://github.com/rust-lang/crates.io-index)" = "44dd2cfde475037451fa99b7e5df77aa3cfd1536575fa8e7a538ab36dcde49ae"

vm/Cargo.toml

@@ -18,6 +18,7 @@ serde_derive = "1.0.66"
 serde_json = "1.0.26"
 byteorder = "1.2.6"
 regex = "1"
+rustc_version_runtime = "0.1.*"
 statrs = "0.10.0"
 caseless = "0.2.1"
 unicode-segmentation = "1.2.1"

vm/src/stdlib/mod.rs

@@ -3,6 +3,7 @@ mod dis;
 mod json;
 mod keyword;
 mod math;
+mod platform;
 mod pystruct;
 mod random;
 mod re;
@@ -33,6 +34,7 @@ pub fn get_module_inits() -> HashMap<String, StdlibInitFunc> {
     modules.insert("json".to_string(), Box::new(json::mk_module));
     modules.insert("keyword".to_string(), Box::new(keyword::mk_module));
     modules.insert("math".to_string(), Box::new(math::mk_module));
+    modules.insert("platform".to_string(), Box::new(platform::mk_module));
     modules.insert("re".to_string(), Box::new(re::mk_module));
     modules.insert("random".to_string(), Box::new(random::mk_module));
     modules.insert("string".to_string(), Box::new(string::mk_module));

vm/src/stdlib/platform.rs

@@ -0,0 +1,29 @@
+extern crate rustc_version_runtime;
+
+use crate::pyobject::{PyContext, PyFuncArgs, PyObjectRef, PyResult};
+use crate::VirtualMachine;
+
+pub fn mk_module(ctx: &PyContext) -> PyObjectRef {
+    py_module!(ctx, "platform", {
+        "python_compiler" => ctx.new_rustfunc(platform_python_compiler),
+        "python_implementation" => ctx.new_rustfunc(platform_python_implementation),
+        "python_version" => ctx.new_rustfunc(platform_python_version),
+    })
+}
+
+fn platform_python_implementation(vm: &mut VirtualMachine, args: PyFuncArgs) -> PyResult {
+    arg_check!(vm, args);
+    Ok(vm.new_str("RustPython".to_string()))
+}
+
+fn platform_python_version(vm: &mut VirtualMachine, args: PyFuncArgs) -> PyResult {
+    arg_check!(vm, args);
+    // TODO: fetch version from somewhere.
+    Ok(vm.new_str("4.0.0".to_string()))
+}
+
+fn platform_python_compiler(vm: &mut VirtualMachine, args: PyFuncArgs) -> PyResult {
+    arg_check!(vm, args);
+    let version = rustc_version_runtime::version_meta();
+    Ok(vm.new_str(format!("rustc {}", version.semver)))
+}