build(cargo): Add FFI placeholder library

Cargo.toml

@@ -2,4 +2,5 @@
 
 members = [
     "rekordcrate",
+    "rekordcrate-ffi",
 ]

rekordcrate-ffi/Cargo.toml

@@ -0,0 +1,18 @@
+[package]
+name = "rekordcrate-ffi"
+version = "0.1.1"
+authors = ["Jan Holthuis <[email protected]>"]
+description = "C bindings for rekordcrate"
+readme = "README.md"
+repository = "https://github.com/Holzhaus/rekordcrate"
+license = "MPL-2.0"
+keywords = ["rekordbox", "dj", "export", "database", "parser"]
+categories = ["parser-implementations"]
+edition = "2021"
+exclude = [".*"]
+
+[dependencies]
+rekordcrate = { version = "0.1.1", path = "../rekordcrate" }
+
+[lib]
+crate_type = ["cdylib"]

rekordcrate-ffi/src/lib.rs

@@ -0,0 +1,29 @@
+// Copyright (c) 2022 Jan Holthuis <[email protected]>
+//
+// This Source Code Form is subject to the terms of the Mozilla Public License, v. 2.0. If a copy
+// of the MPL was not distributed with this file, You can obtain one at
+// http://mozilla.org/MPL/2.0/.
+//
+// SPDX-License-Identifier: MPL-2.0
+
+//! Bindings for using rekordcrate from C code.
+
+#![cfg_attr(not(debug_assertions), deny(warnings))]
+#![deny(rust_2018_idioms)]
+#![deny(rust_2021_compatibility)]
+#![deny(missing_debug_implementations)]
+#![deny(missing_docs)]
+#![deny(rustdoc::broken_intra_doc_links)]
+#![deny(clippy::all)]
+#![deny(clippy::explicit_deref_methods)]
+#![deny(clippy::explicit_into_iter_loop)]
+#![deny(clippy::explicit_iter_loop)]
+#![deny(clippy::must_use_candidate)]
+#![cfg_attr(not(test), deny(clippy::panic_in_result_fn))]
+#![cfg_attr(not(debug_assertions), deny(clippy::used_underscore_binding))]
+
+/// This is just a test function.
+#[no_mangle]
+pub extern "C" fn rekordcrate_hello() {
+    println!("Hello World!");
+}