build.rs

//! The build.rs file is necessary to unzip the rules.
//! rules.zip are needed so there is a way to get the rules dir into the build since you can't get it from the crate.

extern crate cbindgen;

use std::path::{PathBuf, Path};
use std::env;
use cbindgen::*;

#[cfg(target_os = "windows")]
extern crate embed_resource;
#[cfg(target_os = "windows")]
use std::fs;

fn embed_description() {	

    #[cfg(target_os = "windows")] {
		let _name: &str = option_env!("CARGO_PKG_NAME").unwrap_or("");
		let _version_major: &str = option_env!("CARGO_PKG_VERSION_MAJOR").unwrap_or("0");
		let _version_minor: &str = option_env!("CARGO_PKG_VERSION_MINOR").unwrap_or("0");
		let _version_patch: &str = option_env!("CARGO_PKG_VERSION_PATCH").unwrap_or("0");
		let _authors: &str = option_env!("CARGO_PKG_AUTHORS").unwrap_or("");
		let _description: &str = option_env!("CARGO_PKG_DESCRIPTION").unwrap_or("");
		let _license: &str = option_env!("CARGO_PKG_LICENSE").unwrap_or("");


		let data = format!("1 VERSIONINFO
FILEVERSION {_version_major},{_version_minor},{_version_patch}

BEGIN
	BLOCK \"StringFileInfo\"
	BEGIN
		BLOCK \"040904b0\"
		BEGIN
			VALUE \"FileDescription\", \"{_description}\"
			VALUE \"ProductName\", \"{_name}\"
			VALUE \"ProductVersion\", \"{_version_major}.{_version_minor}.{_version_patch}\"
		END
	END
	BLOCK \"VarFileInfo\"
	BEGIN
		VALUE \"Translation\", 0x409, 1200
	END
END");
		fs::write("version.rc", data).expect("Unable to write file");
		embed_resource::compile("version.rc", embed_resource::NONE);
	
	}
}

#[cfg(feature = "include-zip")]
use zip::ZipArchive;
#[cfg(feature = "include-zip")]
fn unzip_rules(location: &Path) {
        let archive = libmathcat::ZIPPED_RULE_FILES;
        let archive = std::io::Cursor::new(archive);

        let mut zip_archive = ZipArchive::new(archive).unwrap();
        zip_archive.extract(location).expect("Zip extraction failed");
}

fn main() {
    let examples_dir = PathBuf::from("Example");

    #[cfg(feature = "include-zip")]
    unzip_rules(&examples_dir);
    
    write_headers(&examples_dir, "mathcat-c.h", Language::C);
    write_headers(&examples_dir, "mathcat.h", Language::Cxx);

	embed_description();
}

fn write_headers(location: &Path, name: &str, header_style: cbindgen::Language) {
    let config = cbindgen::Config::from_file(
            if header_style == Language::Cxx {"cbindgen.toml"} else {"cbindgen-c.toml"}
        ).expect("couldn't read cbindgen.toml");
    let crate_dir = env::var("CARGO_MANIFEST_DIR").unwrap();
    let mut location = PathBuf::from(location);
    location.push(name);
    cbindgen::Builder::new()
    .with_language(header_style)
    .with_cpp_compat(true)
    .with_config(config)
    .with_crate(crate_dir)
    .generate()
    .expect("Unable to generate bindings")
    .write_to_file(location);
}