rvsttd: model fetch mode, build from source, ~/.rvsttd convention

rvsttd/Cargo.toml

@@ -10,6 +10,9 @@ path = "src/main.rs"
 [dependencies]
 anyhow = "1"
 cpal = "0.15"
+serde = { version = "1", features = ["derive"] }
+serde_json = "1"
+ureq = "2"
 
 [build-dependencies]
 bindgen = "0.71"

rvsttd/build.rs

@@ -1,9 +1,10 @@
 use std::path::PathBuf;
 
 fn main() {
-    let manifest_dir = PathBuf::from(env!("CARGO_MANIFEST_DIR"));
+    let home = std::env::var("HOME").unwrap_or_else(|_| "/root".to_string());
-    let lib_dir = manifest_dir.join("..").join("bench").join("moonshine-voice").join("lib");
+    let rvsttd_dir = PathBuf::from(&home).join(".rvsttd");
-    let include_dir = manifest_dir.join("..").join("bench").join("moonshine-voice").join("include");
+    let lib_dir = rvsttd_dir.join("lib");
+    let include_dir = rvsttd_dir.join("include");
     let header = include_dir.join("moonshine-c-api.h");
 
     println!("cargo:rerun-if-changed={}", header.display());

rvsttd/setup.sh

@@ -0,0 +1,95 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+RVSTTD_DIR="${HOME}/.rvsttd"
+LIB_DIR="${RVSTTD_DIR}/lib"
+INCLUDE_DIR="${RVSTTD_DIR}/include"
+BUILD_DIR="${RVSTTD_DIR}/build"
+
+ARCH="linux-x86_64"
+
+# Fetch latest release tag from GitHub API
+VERSION=$(curl -s https://api.github.com/repos/moonshine-ai/moonshine/releases/latest | grep '"tag_name"' | sed -E 's/.*"([^"]+)".*/\1/')
+if [ -z "${VERSION}" ]; then
+    echo "ERROR: could not fetch latest release tag from GitHub API"
+    exit 1
+fi
+
+PREBUILT_URL="https://github.com/moonshine-ai/moonshine/releases/download/${VERSION}/moonshine-voice-${ARCH}.tar.gz"
+SOURCE_URL="https://github.com/moonshine-ai/moonshine/archive/refs/tags/${VERSION}.tar.gz"
+
+echo "=== rvsttd setup ==="
+echo "Latest Moonshine release: ${VERSION}"
+echo "Target: ${RVSTTD_DIR}"
+echo ""
+
+mkdir -p "${LIB_DIR}" "${INCLUDE_DIR}" "${BUILD_DIR}"
+
+# Step 1: Download prebuilt package (for libonnxruntime.so.1 + header)
+PREBUILT_TGZ="${BUILD_DIR}/moonshine-voice-${ARCH}.tar.gz"
+PREBUILT_EXTRACTED="${BUILD_DIR}/moonshine-voice-${ARCH}"
+
+if [ ! -f "${LIB_DIR}/libonnxruntime.so.1" ]; then
+    echo ">>> Downloading prebuilt package (for libonnxruntime.so.1)..."
+    curl -L -o "${PREBUILT_TGZ}" "${PREBUILT_URL}"
+    mkdir -p "${PREBUILT_EXTRACTED}"
+    tar xzf "${PREBUILT_TGZ}" -C "${PREBUILT_EXTRACTED}" --strip-components=1
+
+    # Copy ONNX Runtime (prebuilt is fine — it has no glibc issue)
+    cp "${PREBUILT_EXTRACTED}/lib/libonnxruntime.so.1" "${LIB_DIR}/"
+    echo "    Installed libonnxruntime.so.1"
+
+    # Copy the header (it's the same in source and prebuilt)
+    cp "${PREBUILT_EXTRACTED}/include/moonshine-c-api.h" "${INCLUDE_DIR}/"
+    echo "    Installed moonshine-c-api.h"
+else
+    echo ">>> libonnxruntime.so.1 already present, skipping prebuilt download"
+fi
+
+# Step 2: Download source
+SOURCE_TGZ="${BUILD_DIR}/moonshine-source.tar.gz"
+SOURCE_DIR="${BUILD_DIR}/moonshine-source"
+
+if [ ! -d "${SOURCE_DIR}" ]; then
+    echo ">>> Downloading Moonshine source ${VERSION}..."
+    curl -L -o "${SOURCE_TGZ}" "${SOURCE_URL}"
+    mkdir -p "${SOURCE_DIR}"
+    tar xzf "${SOURCE_TGZ}" -C "${SOURCE_DIR}" --strip-components=1
+fi
+
+# Step 3: Build libmoonshine.so from source
+CMAKE_BUILD="${BUILD_DIR}/cmake-build"
+
+if [ ! -f "${LIB_DIR}/libmoonshine.so" ]; then
+    echo ">>> Building libmoonshine.so from source..."
+
+    # Point CMake at the prebuilt ONNX Runtime
+    ORT_LIB_DIR="${LIB_DIR}"
+    ORT_INCLUDE_DIR="${SOURCE_DIR}/core/third-party/onnxruntime/include"
+
+    mkdir -p "${CMAKE_BUILD}"
+    cd "${CMAKE_BUILD}"
+
+    cmake "${SOURCE_DIR}/core" \
+        -DCMAKE_BUILD_TYPE=Release \
+        -DONNXRUNTIME_LIB_PATH="${ORT_LIB_DIR}/libonnxruntime.so.1" \
+        -DMOONSHINE_TTS_BUILD_ONNX=OFF
+
+    make -j"$(nproc)" moonshine
+
+    cp "${CMAKE_BUILD}/libmoonshine.so" "${LIB_DIR}/"
+    cp "${SOURCE_DIR}/core/moonshine-c-api.h" "${INCLUDE_DIR}/"
+    echo "    Installed libmoonshine.so (built from source)"
+else
+    echo ">>> libmoonshine.so already present, skipping build"
+fi
+
+echo ""
+echo "=== Setup complete ==="
+echo "Library:  ${LIB_DIR}/libmoonshine.so"
+echo "Library:  ${LIB_DIR}/libonnxruntime.so.1"
+echo "Header:   ${INCLUDE_DIR}/moonshine-c-api.h"
+echo ""
+echo "Next: cd rvsttd && cargo build --release"
+echo "Then:  ./target/release/rvsttd fetch    # downloads the model"
+echo "Then:  ./target/release/rvsttd          # starts the server"

rvsttd/src/main.rs

@@ -1,10 +1,12 @@
 use anyhow::{anyhow, Result};
 use cpal::traits::{DeviceTrait, HostTrait, StreamTrait};
 use cpal::{SampleFormat, SampleRate};
+use serde::Deserialize;
 use std::collections::HashSet;
 use std::ffi::CStr;
 use std::io::{BufRead, BufReader, Write};
 use std::net::{TcpListener, TcpStream};
+use std::path::PathBuf;
 use std::sync::atomic::{AtomicBool, Ordering};
 use std::sync::{Arc, Mutex};
 use std::thread;
@@ -353,11 +355,112 @@ fn start_cpal(
     Ok(stream)
 }
 
+// ─── model fetch ──────────────────────────────────────────────────────────
+
+#[derive(Deserialize)]
+struct Manifest {
+    groups: Vec<ManifestGroup>,
+}
+
+#[derive(Deserialize)]
+struct ManifestGroup {
+    #[allow(dead_code)]
+    base_url: String,
+    files: Vec<ManifestFile>,
+}
+
+#[derive(Deserialize)]
+struct ManifestFile {
+    name: String,
+    url: String,
+    size: Option<u64>,
+}
+
+fn fetch_model(model_dir: &str) -> Result<()> {
+    let dest = PathBuf::from(model_dir);
+    log(&format!("Fetching medium-streaming-en model to {}", dest.display()));
+
+    let lang = std::ffi::CString::new("en").unwrap();
+    let opt_name = std::ffi::CString::new("model_arch").unwrap();
+    let opt_value = std::ffi::CString::new("5").unwrap();
+    let mut options = [moonshine_option_t {
+        name: opt_name.as_ptr(),
+        value: opt_value.as_ptr(),
+    }];
+
+    let mut json_ptr: *mut i8 = std::ptr::null_mut();
+    let rc = unsafe {
+        moonshine_get_stt_dependencies(
+            lang.as_ptr(),
+            options.as_mut_ptr(),
+            options.len() as u64,
+            &mut json_ptr,
+        )
+    };
+
+    if rc != 0 || json_ptr.is_null() {
+        return Err(anyhow!("moonshine_get_stt_dependencies failed: {}", err_str(rc)));
+    }
+
+    let json_str = unsafe { CStr::from_ptr(json_ptr) }
+        .to_string_lossy()
+        .into_owned();
+    unsafe { moonshine_free_buffer(json_ptr as *mut std::ffi::c_void) };
+
+    let manifest: Manifest = serde_json::from_str(&json_str)?;
+
+    std::fs::create_dir_all(&dest)?;
+
+    let mut total_files = 0;
+    let mut total_bytes: u64 = 0;
+
+    for group in &manifest.groups {
+        for file in &group.files {
+            let dest_path = dest.join(&file.name);
+            if dest_path.exists() {
+                log(&format!("  SKIP {} (already exists)", file.name));
+                continue;
+            }
+
+            if let Some(parent) = dest_path.parent() {
+                std::fs::create_dir_all(parent)?;
+            }
+
+            log(&format!("  GET {}", file.url));
+            let response = ureq::get(&file.url).call()?;
+
+            if let Some(expected) = file.size {
+                log(&format!("      {} bytes", expected));
+                total_bytes += expected;
+            }
+
+            let mut file_handle = std::fs::File::create(&dest_path)?;
+            std::io::copy(&mut response.into_reader(), &mut file_handle)?;
+            total_files += 1;
+        }
+    }
+
+    log(&format!("Done: {} files, ~{} MB", total_files, total_bytes / (1024 * 1024)));
+    log(&format!("Model directory: {}", dest.display()));
+    Ok(())
+}
+
 // ─── main ─────────────────────────────────────────────────────────────────
 
 fn main() -> Result<()> {
     let mut args = std::env::args().skip(1);
-    let mut model_dir = String::from("../bench/medium-streaming-en");
+
+    let home = std::env::var("HOME").unwrap_or_else(|_| "/root".to_string());
+    let default_model = format!("{}/.rvsttd/model", home);
+
+    let first = args.next();
+    if first.as_deref() == Some("fetch") {
+        let model_dir = args.next().unwrap_or_else(|| default_model.clone());
+        return fetch_model(&model_dir);
+    }
+
+    let mut args = first.into_iter().chain(args);
+    let mut model_dir = default_model;
 
     while let Some(a) = args.next() {
         match a.as_str() {
@@ -366,8 +469,10 @@ fn main() -> Result<()> {
             }
             "--help" | "-h" => {
                 println!("Usage: rvsttd [--model-dir DIR]");
+                println!("       rvsttd fetch [DIR]");
                 println!("Listens on TCP {}", BIND_ADDR);
                 println!("Model: medium-streaming (Moonshine)");
+                println!("'rvsttd fetch' downloads the English medium-streaming model");
                 return Ok(());
             }
             _ => return Err(anyhow!("unknown arg: {}", a)),