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// This Source Code Form is subject to the terms of the Mozilla Public
// License, v. 2.0. If a copy of the MPL was not distributed with this
// file, You can obtain one at https://mozilla.org/MPL/2.0/.
/*! Functionality for building a library containing Python */
use {
crate::{licensing::LicenseInfo, resource::DataLocation},
std::{
collections::{BTreeMap, BTreeSet},
path::PathBuf,
},
};
/// Holds state necessary to build and link a libpython.
///
/// Note that this context is only for producing libpython: it is very
/// linker centric and doesn't track state like Python resources.
#[derive(Clone, Debug, PartialEq)]
pub struct LibPythonBuildContext {
/// Compiled flags to use when compiling the object containing Py_inittab.
pub inittab_cflags: Option<Vec<String>>,
/// Include files defining Python headers.
///
/// These are necessary to compile code that references Python types.
pub includes: BTreeMap<PathBuf, DataLocation>,
/// Object files that will be linked together.
pub object_files: Vec<DataLocation>,
/// Filesystem paths to add to linker search path.
pub library_search_paths: BTreeSet<PathBuf>,
/// System libraries that will be linked against.
pub system_libraries: BTreeSet<String>,
/// Dynamic libraries that will be linked against.
pub dynamic_libraries: BTreeSet<String>,
/// Static libraries that will be linked against.
pub static_libraries: BTreeSet<String>,
/// Frameworks that will be linked against.
///
/// Used on Apple platforms.
pub frameworks: BTreeSet<String>,
/// Builtin extension module initialization functions.
///
/// Key is extension name. Value is initialization function. The
/// function can have the special value `NULL`.
pub init_functions: BTreeMap<String, String>,
/// Holds licensing info for things being linked together.
///
/// Keys are entity name (e.g. extension name). Values are license
/// structures.
pub license_infos: BTreeMap<String, Vec<LicenseInfo>>,
}
impl Default for LibPythonBuildContext {
fn default() -> Self {
Self {
inittab_cflags: None,
includes: BTreeMap::new(),
object_files: Vec::new(),
library_search_paths: BTreeSet::new(),
system_libraries: BTreeSet::new(),
dynamic_libraries: BTreeSet::new(),
static_libraries: BTreeSet::new(),
frameworks: BTreeSet::new(),
init_functions: BTreeMap::new(),
license_infos: BTreeMap::new(),
}
}
}
impl LibPythonBuildContext {
/// Merge multiple `LinkingContext` together to produce an aggregate instance.
pub fn merge(contexts: &[&Self]) -> Self {
let mut inittab_cflags = None;
let mut includes = BTreeMap::new();
let mut object_files = Vec::new();
let mut library_search_paths = BTreeSet::new();
let mut system_libraries = BTreeSet::new();
let mut dynamic_libraries = BTreeSet::new();
let mut static_libraries = BTreeSet::new();
let mut frameworks = BTreeSet::new();
let mut init_functions = BTreeMap::new();
let mut license_infos = BTreeMap::new();
for context in contexts {
// Last write wins.
if let Some(flags) = &context.inittab_cflags {
inittab_cflags = Some(flags.clone());
}
for (k, v) in &context.includes {
includes.insert(k.clone(), v.clone());
}
for o in &context.object_files {
object_files.push(o.clone());
}
for p in &context.library_search_paths {
library_search_paths.insert(p.clone());
}
for l in &context.system_libraries {
system_libraries.insert(l.clone());
}
for l in &context.dynamic_libraries {
dynamic_libraries.insert(l.clone());
}
for l in &context.static_libraries {
static_libraries.insert(l.clone());
}
for f in &context.frameworks {
frameworks.insert(f.clone());
}
for (k, v) in &context.init_functions {
init_functions.insert(k.clone(), v.clone());
}
for (k, v) in &context.license_infos {
license_infos.insert(k.clone(), v.clone());
}
}
Self {
inittab_cflags,
includes,
object_files,
library_search_paths,
system_libraries,
dynamic_libraries,
static_libraries,
frameworks,
init_functions,
license_infos,
}
}
}