Added a separate bindgen building crate and pre-generated bindings

implot-sys-bindgen/src/main.rs

@@ -0,0 +1,44 @@
+use bindgen::{Builder, CargoCallbacks};
+use std::{env, path::PathBuf};
+
+// All this crate does is run bindgen on cimplot and store the result
+// in the src folder of the implot-sys crate. We add those bindings
+// to git so people don't have to install clang just to use implot-rs.
+
+fn main() {
+    let cwd = env::current_dir().expect("Could not read current directory");
+    let sys_crate_path = cwd
+        .join("..")
+        .join("implot-sys")
+        .canonicalize()
+        .expect("Could not find sys crate directory");
+
+    let cimgui_include_path = PathBuf::from(
+        env::var_os("DEP_IMGUI_THIRD_PARTY").expect("DEP_IMGUI_THIRD_PARTY not defined"),
+    );
+
+    let bindings = Builder::default()
+        .header(
+            cimgui_include_path
+                .join("cimgui.h")
+                .to_str()
+                .expect("Could not convert cimgui.h path to string"),
+        )
+        .header(
+            sys_crate_path
+                .join("third-party")
+                .join("cimplot")
+                .join("cimplot.h")
+                .to_str()
+                .expect("Could not turn cimplot.h path into string"),
+        )
+        .parse_callbacks(Box::new(CargoCallbacks))
+        .clang_arg("-DCIMGUI_DEFINE_ENUMS_AND_STRUCTS=1")
+        .generate()
+        .expect("Unable to generate bindings");
+
+    let out_path = sys_crate_path.join("src");
+    bindings
+        .write_to_file(&out_path.join("bindings.rs"))
+        .expect("Couldn't write bindings!");
+}