lvgl-rs/lvgl-sys/build.rs

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Rust
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use cc::Build;
use std::{env, path::Path, path::PathBuf};
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static CONFIG_NAME: &str = "DEP_LV_CONFIG_PATH";
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fn main() {
let project_dir = PathBuf::from(env::var("CARGO_MANIFEST_DIR").unwrap())
.canonicalize()
.unwrap();
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let shims_dir = project_dir.join("shims");
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let vendor = project_dir.join("vendor");
let vendor_src = vendor.join("lvgl").join("src");
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let lv_config_dir = {
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let raw_path = env::var(CONFIG_NAME).unwrap_or_else(|_| {
panic!(
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"The environment variable {} is required to be defined",
CONFIG_NAME
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);
});
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let conf_path = PathBuf::from(raw_path);
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if !conf_path.exists() {
panic!(format!(
"Directory referenced by {} needs to exist",
CONFIG_NAME
));
}
if !conf_path.is_dir() {
panic!(format!("{} needs to be a directory", CONFIG_NAME));
}
if !conf_path.join("lv_conf.h").exists() {
panic!(format!(
"Directory referenced by {} needs to contain a file called lv_conf.h",
CONFIG_NAME
));
}
println!(
"cargo:rerun-if-changed={}",
conf_path.join("lv_conf.h").to_str().unwrap()
);
conf_path
};
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let mut cfg = Build::new();
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add_c_files(&mut cfg, vendor_src.join("lv_core"));
add_c_files(&mut cfg, vendor_src.join("lv_draw"));
add_c_files(&mut cfg, vendor_src.join("lv_font"));
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add_c_files(&mut cfg, vendor_src.join("lv_gpu"));
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add_c_files(&mut cfg, vendor_src.join("lv_hal"));
add_c_files(&mut cfg, vendor_src.join("lv_misc"));
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add_c_files(&mut cfg, vendor_src.join("lv_themes"));
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add_c_files(&mut cfg, vendor_src.join("lv_widgets"));
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add_c_files(&mut cfg, &lv_config_dir);
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add_c_files(&mut cfg, &shims_dir);
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cfg.define("LV_CONF_INCLUDE_SIMPLE", Some("1"))
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.include(&vendor_src)
.include(&vendor)
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.file("string.c")
.warnings(false)
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.include(&lv_config_dir)
.compile("lvgl");
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let cc_args = [
"-DLV_CONF_INCLUDE_SIMPLE=1",
"-I",
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lv_config_dir.to_str().unwrap(),
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"-I",
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vendor.to_str().unwrap(),
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];
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let out_path = PathBuf::from(env::var("OUT_DIR").unwrap());
bindgen::Builder::default()
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.header(shims_dir.join("lvgl_sys.h").to_str().unwrap())
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.layout_tests(false)
.use_core()
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.rustfmt_bindings(true)
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.ctypes_prefix("cty")
.clang_args(&cc_args)
.generate()
.expect("Unable to generate bindings")
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.write_to_file(out_path.join("bindings.rs"))
.expect("Can't write bindings!");
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}
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fn add_c_files(build: &mut cc::Build, path: impl AsRef<Path>) {
for e in path.as_ref().read_dir().unwrap() {
let e = e.unwrap();
let path = e.path();
if e.file_type().unwrap().is_dir() {
// skip dirs for now
} else if path.extension().and_then(|s| s.to_str()) == Some("c") {
build.file(&path);
}
}
}