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Create djls-dev crate and centralize Python linking build scripts (#119)

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Josh Thomas 2025-04-30 12:59:04 -05:00 • committed by GitHub
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11 changed files with 66 additions and 132 deletions
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2
crates/djls-server/Cargo.toml
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@ -18,4 +18,4 @@ tower-lsp-server = { workspace = true }
percent-encoding = "2.3"
[build-dependencies]
pyo3-build-config = { workspace = true, features = ["resolve-config"] }
djls-dev = { workspace = true }

44
crates/djls-server/build.rs
View file

@ -1,45 +1,3 @@
/// Build script to configure linking against the Python library.
///
/// This script is necessary when the crate's code, particularly tests
/// that interact with the Python interpreter via `pyo3` (e.g., using
/// `Python::with_gil`, importing modules, calling Python functions),
/// needs symbols from the Python C API at link time.
///
/// It uses `pyo3-build-config` to detect the Python installation and
/// prints the required `cargo:rustc-link-search` and `cargo:rustc-link-lib`
/// directives to Cargo, enabling the linker to find and link against the
/// appropriate Python library (e.g., libpythonX.Y.so).
///
/// It also adds an RPATH linker argument on Unix-like systems so the
/// resulting test executable can find the Python library at runtime.
///
/// Note: Each crate whose test target requires Python linking needs its
/// own `build.rs` with this logic.
fn main() {
println!("cargo:rerun-if-changed=build.rs");
// Set up #[cfg] flags first (useful for conditional compilation)
pyo3_build_config::use_pyo3_cfgs();
// Get the Python interpreter configuration directly
let config = pyo3_build_config::get();
// Add the library search path if available
if let Some(lib_dir) = &config.lib_dir {
println!("cargo:rustc-link-search=native={}", lib_dir);
// Add RPATH linker argument for Unix-like systems (Linux, macOS)
// This helps the test executable find the Python library at runtime.
#[cfg(not(windows))]
println!("cargo:rustc-link-arg=-Wl,-rpath,{}", lib_dir);
} else {
println!("cargo:warning=Python library directory not found in config.");
}
// Add the library link directive if available
if let Some(lib_name) = &config.lib_name {
println!("cargo:rustc-link-lib=dylib={}", lib_name);
} else {
println!("cargo:warning=Python library name not found in config.");
}
djls_dev::setup_python_linking();
}