use bindgen; use cc::Build; use std::{env, path::Path, path::PathBuf}; static CONFIG_NAME: &str = "DEP_LV_CONFIG_PATH"; fn main() { let project_dir = PathBuf::from(env::var("CARGO_MANIFEST_DIR").unwrap()) .canonicalize() .unwrap(); let include_dir = project_dir.join("include"); let vendor = project_dir.join("vendor"); let vendor_src = vendor.join("lvgl").join("src"); let lv_config_dir = { let raw_path = env::var(CONFIG_NAME).expect( format!( "The environment variable {} is required to be defined", CONFIG_NAME ) .as_str(), ); let conf_path = PathBuf::from(raw_path); 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 }; let mut cfg = Build::new(); 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")); add_c_files(&mut cfg, vendor_src.join("lv_hal")); add_c_files(&mut cfg, vendor_src.join("lv_misc")); add_c_files(&mut cfg, vendor_src.join("lv_objx")); add_c_files(&mut cfg, vendor_src.join("lv_themes")); add_c_files(&mut cfg, vendor_src.join("lv_themes")); add_c_files(&mut cfg, &lv_config_dir); add_c_files(&mut cfg, &include_dir); cfg.define("LV_CONF_INCLUDE_SIMPLE", Some("1")) .include(&vendor_src) .include(&vendor) .warnings(false) .include(&lv_config_dir) .compile("lvgl"); let cc_args = [ "-DLV_CONF_INCLUDE_SIMPLE=1", "-I", lv_config_dir.to_str().unwrap(), "-I", vendor.to_str().unwrap(), ]; bindgen::Builder::default() .header(include_dir.join("lvgl_sys.h").to_str().unwrap()) .layout_tests(false) .use_core() .ctypes_prefix("cty") .raw_line("use cty;") .clang_args(&cc_args) .generate() .expect("Unable to generate bindings") .write_to_file(project_dir.join("src").join("bindings.rs")) .expect("Can't write bindings!"); } fn add_c_files(build: &mut cc::Build, path: impl AsRef) { 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); } } }