Use custom generated bindings

Author: morr0ne

.gitignore

@@ -1 +1,3 @@
 /target
+linux
+temp

Cargo.lock

@@ -17,7 +17,6 @@ include = ["src/**/*.rs", "README.md", "LICENSE"]
 tracing = ["dep:tracing"]
 
 [dependencies]
-drm-sys = "0.8.0"
 rustix = { version = "0.38.44", default-features = false, features = [
     "mm",
     "std",

Cargo.toml

@@ -4,3 +4,7 @@ version = "0.1.0"
 edition = "2021"
 
 [dependencies]
+anyhow = "1.0.95"
+bindgen = "0.71.1"
+tempfile = "3.16.0"
+xshell = "0.2.7"

gen/Cargo.toml

@@ -0,0 +1,2 @@
+#include <drm/drm.h>
+#include <drm/drm_mode.h>

gen/src/bindings.h

@@ -1,3 +1,39 @@
-fn main() {
-    println!("Hello, world!");
+use std::fs;
+
+use anyhow::Result;
+use tempfile::TempDir;
+use xshell::{cmd, Shell};
+
+const VERSION: &str = "v6.13";
+
+fn main() -> Result<()> {
+    let sh = Shell::new()?;
+
+    if !fs::exists("linux/.git")? {
+        cmd!(
+            sh,
+            "git clone --filter=tree:0 --no-checkout https://github.com/torvalds/linux.git"
+        )
+        .run()?;
+    }
+
+    sh.change_dir("linux");
+
+    cmd!(sh, "git fetch origin tag {VERSION}").run()?;
+    cmd!(sh, "git checkout {VERSION}").run()?;
+
+    let temp_dir = TempDir::with_prefix("diretto-linux-bindings-")?;
+    let work_dir = temp_dir.path();
+
+    cmd!(sh, "make headers_install INSTALL_HDR_PATH={work_dir}").run()?;
+
+    let bindings = bindgen::builder()
+        .clang_arg(format!("-I{}", work_dir.join("include").display()))
+        .header("src/bindings.h")
+        .use_core()
+        .generate()?;
+
+    bindings.write_to_file("../src/sys.rs")?;
+
+    Ok(())
 }

gen/src/main.rs

@@ -8,7 +8,10 @@ use std::{
     slice,
 };
 
-use drm_sys::{
+#[allow(nonstandard_style)]
+pub mod sys;
+
+use sys::{
     drm_mode_card_res, drm_mode_create_dumb, drm_mode_crtc, drm_mode_fb_cmd,
     drm_mode_get_connector, drm_mode_get_encoder, drm_mode_get_plane_res, drm_mode_map_dumb,
     drm_mode_modeinfo, drm_version, DRM_IOCTL_BASE,