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use rustpython_parser::ast::{Expression, ExpressionType, Number, StatementType, StringGroup};
use rustpython_parser::parser;
#[derive(Debug, Clone)]
pub struct PythonConfig {
sys_config_data: SysConfigData,
}
impl PythonConfig {
pub fn parse(src: &str) -> Self {
let sys_config_data = SysConfigData::parse(src);
Self { sys_config_data }
}
pub fn version(&self) -> &str {
&self.sys_config_data.build_time_vars.version
}
pub fn version_major(&self) -> u32 {
let version = self.version();
version
.split('.')
.next()
.and_then(|x| x.parse::<u32>().ok())
.unwrap()
}
pub fn version_minor(&self) -> u32 {
let version = self.version();
version
.split('.')
.nth(1)
.and_then(|x| x.parse::<u32>().ok())
.unwrap()
}
pub fn prefix(&self) -> &str {
&self.sys_config_data.build_time_vars.prefix
}
pub fn exec_prefix(&self) -> &str {
&self.sys_config_data.build_time_vars.exec_prefix
}
pub fn cflags(&self) -> &str {
&self.sys_config_data.build_time_vars.cflags
}
pub fn libs(&self) -> &str {
&self.sys_config_data.build_time_vars.libs
}
pub fn ldflags(&self) -> &str {
&self.sys_config_data.build_time_vars.ldflags
}
pub fn ext_suffix(&self) -> &str {
&self.sys_config_data.build_time_vars.ext_suffix
}
pub fn abiflags(&self) -> &str {
&self.sys_config_data.build_time_vars.abiflags
}
pub fn config_dir(&self) -> &str {
&self.sys_config_data.build_time_vars.config_dir
}
pub fn include_dir(&self) -> &str {
&self.sys_config_data.build_time_vars.include_dir
}
pub fn lib_dir(&self) -> &str {
&self.sys_config_data.build_time_vars.lib_dir
}
pub fn ld_version(&self) -> &str {
&self.sys_config_data.build_time_vars.ld_version
}
pub fn soabi(&self) -> &str {
&self.sys_config_data.build_time_vars.soabi
}
pub fn shlib_suffix(&self) -> &str {
&self.sys_config_data.build_time_vars.shlib_suffix
}
pub fn enable_shared(&self) -> bool {
self.sys_config_data.build_time_vars.py_enable_shared
}
pub fn debug(&self) -> bool {
self.sys_config_data.build_time_vars.py_debug
}
pub fn ref_debug(&self) -> bool {
self.sys_config_data.build_time_vars.py_ref_debug
}
pub fn with_thread(&self) -> bool {
self.sys_config_data.build_time_vars.with_thread
}
pub fn pointer_width(&self) -> u32 {
self.sys_config_data.build_time_vars.size_of_void_p
}
}
#[derive(Debug, Clone)]
struct SysConfigData {
pub build_time_vars: BuildTimeVars,
}
#[derive(Debug, Clone, Default)]
struct BuildTimeVars {
pub abiflags: String,
pub count_allocs: bool,
pub cflags: String,
pub config_dir: String,
pub ext_suffix: String,
pub exec_prefix: String,
pub include_dir: String,
pub lib_dir: String,
pub libs: String,
pub ldflags: String,
pub ld_version: String,
pub prefix: String,
pub py_debug: bool,
pub py_ref_debug: bool,
pub py_trace_refs: bool,
pub py_enable_shared: bool,
pub soabi: String,
pub shlib_suffix: String,
pub size_of_void_p: u32,
pub with_thread: bool,
pub version: String,
}
impl SysConfigData {
pub fn parse(src: &str) -> Self {
let program = parser::parse_program(src).unwrap();
let mut vars = BuildTimeVars::default();
for stmt in program.statements {
match stmt.node {
StatementType::Assign { targets, value } => {
let var_name = targets.iter().next().unwrap();
match &var_name.node {
ExpressionType::Identifier { name } if name == "build_time_vars" => {}
_ => continue,
}
if let ExpressionType::Dict { elements } = value.node {
for (key, value) in elements {
if let Some(key) = key {
let key = get_string(&key).unwrap();
match key.as_str() {
"ABIFLAGS" => vars.abiflags = get_string(&value).unwrap(),
"COUNT_ALLOCS" => vars.count_allocs = get_bool(&value),
"CFLAGS" => vars.cflags = get_string(&value).unwrap(),
"LIBPL" => vars.config_dir = get_string(&value).unwrap(),
"EXT_SUFFIX" => vars.ext_suffix = get_string(&value).unwrap(),
"exec_prefix" => vars.exec_prefix = get_string(&value).unwrap(),
"INCLUDEDIR" => vars.include_dir = get_string(&value).unwrap(),
"LIBDIR" => vars.lib_dir = get_string(&value).unwrap(),
"LIBS" => vars.libs = get_string(&value).unwrap(),
"LDFLAGS" => vars.ldflags = get_string(&value).unwrap(),
"LDVERSION" => vars.ld_version = get_string(&value).unwrap(),
"prefix" => vars.prefix = get_string(&value).unwrap(),
"Py_DEBUG" => vars.py_debug = get_bool(&value),
"Py_ENABLE_SHARED" => vars.py_enable_shared = get_bool(&value),
"Py_REF_DEBUG" => vars.py_ref_debug = get_bool(&value),
"Py_TRACE_REFS" => vars.py_trace_refs = get_bool(&value),
"SOABI" => vars.soabi = get_string(&value).unwrap(),
"SHLIB_SUFFIX" => {
vars.shlib_suffix = get_string(&value).unwrap()
}
"SIZEOF_VOID_P" => {
vars.size_of_void_p = get_number(&value).unwrap() as u32
}
"VERSION" => vars.version = get_string(&value).unwrap(),
_ => continue,
}
} else {
continue;
}
}
}
}
_ => {}
}
}
SysConfigData {
build_time_vars: vars,
}
}
}
fn get_string(expr: &Expression) -> Option<String> {
match &expr.node {
ExpressionType::String { value: sg } => match sg {
StringGroup::Constant { value } => Some(value.to_string()),
StringGroup::Joined { values } => {
let mut s = String::new();
for value in values {
match value {
StringGroup::Constant { value: cs } => s.push_str(&cs),
_ => {}
}
}
Some(s)
}
_ => None,
},
_ => None,
}
}
fn get_number(expr: &Expression) -> Option<i32> {
use num_traits::cast::ToPrimitive;
match &expr.node {
ExpressionType::Number { value } => match value {
Number::Integer { value } => value.to_i32(),
_ => None,
},
_ => None,
}
}
fn get_bool(expr: &Expression) -> bool {
get_number(expr).map(|x| x == 1).unwrap_or(false)
}
#[cfg(test)]
mod tests {
use super::PythonConfig;
use std::fs;
#[test]
fn read_python_sysconfig_data() {
let src =
fs::read_to_string("tests/fixtures/cpython38_sysconfigdata__darwin_darwin.py").unwrap();
let config = PythonConfig::parse(&src);
assert_eq!(config.abiflags(), "");
assert_eq!(config.soabi(), "cpython-38-darwin");
assert_eq!(config.version(), "3.8");
assert_eq!(config.version_major(), 3);
assert_eq!(config.version_minor(), 8);
}
}