Rename project to quicnprotochat

crates/quicnprotochat-proto/build.rs

@@ -0,0 +1,59 @@
+//! Build script for quicnprotochat-proto.
+//!
+//! Invokes the `capnp` compiler to generate Rust types from `.capnp` schemas
+//! located in the workspace-root `schemas/` directory.
+//!
+//! # Prerequisites
+//!
+//! The `capnp` CLI must be installed and on `PATH`.
+//!
+//! Debian/Ubuntu:  apt-get install capnproto
+//! macOS:          brew install capnp
+//! Docker:         see docker/Dockerfile
+
+use std::{env, path::PathBuf};
+
+fn main() {
+    let manifest_dir =
+        PathBuf::from(env::var("CARGO_MANIFEST_DIR").expect("CARGO_MANIFEST_DIR not set by Cargo"));
+
+    // Workspace root is two levels above this crate (quicnprotochat/crates/quicnprotochat-proto).
+    let workspace_root = manifest_dir
+        .join("../..")
+        .canonicalize()
+        .expect("could not canonicalize workspace root path");
+
+    let schemas_dir = workspace_root.join("schemas");
+
+    // Re-run this build script whenever any schema file changes.
+    println!(
+        "cargo:rerun-if-changed={}",
+        schemas_dir.join("envelope.capnp").display()
+    );
+    println!(
+        "cargo:rerun-if-changed={}",
+        schemas_dir.join("auth.capnp").display()
+    );
+    println!(
+        "cargo:rerun-if-changed={}",
+        schemas_dir.join("delivery.capnp").display()
+    );
+    println!(
+        "cargo:rerun-if-changed={}",
+        schemas_dir.join("node.capnp").display()
+    );
+
+    capnpc::CompilerCommand::new()
+        // Treat `schemas/` as the include root so that inter-schema imports
+        // resolve correctly.
+        .src_prefix(&schemas_dir)
+        .file(schemas_dir.join("envelope.capnp"))
+        .file(schemas_dir.join("auth.capnp"))
+        .file(schemas_dir.join("delivery.capnp"))
+        .file(schemas_dir.join("node.capnp"))
+        .run()
+        .expect(
+            "Cap'n Proto schema compilation failed. \
+             Is `capnp` installed? (apt-get install capnproto / brew install capnp)",
+        );
+}