chore: remove binaries from repo to publish on crates

crates/Cargo.toml

@@ -15,4 +15,4 @@ num-bigint = "0.4.6"
 num-traits = "0.2.19"
 
 [build-dependencies]
-cc = "1.0"
+cc = "1.0"

crates/README.md

@@ -77,6 +77,10 @@ let valid = rust_rapidsnark::groth16_verify_wrapper(
 -   aarch64-linux-android
 -   x86_64-linux-android
 
+## Uploaded binaries
+
+-   Rapidsnark artifacts are uploaded [here](https://github.com/vivianjeng/rapidsnark/actions/runs/13075683259)
+
 ## Community
 
 -   Website: [zkmopro.com](https://zkmopro.com)

crates/build.rs

@@ -2,20 +2,34 @@ use std::env;
 use std::fs;
 use std::path::Path;
 use std::path::PathBuf;
+use std::process::Command;
+
+const RAPIDSNARK_DOWNLOAD_SCRIPT: &str = include_str!("./download_rapidsnark.sh");
 
 fn main() {
-    let target = std::env::var("TARGET").unwrap();
+    let target = env::var("TARGET").unwrap();
+    let out_dir = env::var("OUT_DIR").expect("OUT_DIR not set");
     let arch = target.split('-').next().unwrap();
 
     // Try to list contents of the target directory
-    let manifest_dir = PathBuf::from(std::env::var("CARGO_MANIFEST_DIR").unwrap());
-    let rapidsnark_dir = manifest_dir.join("rapidsnark");
-    let absolute_lib_path = if rapidsnark_dir.join(&target).exists() {
-        rapidsnark_dir.join(&target)
+    let rapidsnark_path = Path::new(&out_dir).join(Path::new("rapidsnark"));
+    // If the rapidsnark repo is not downloaded, download it
+    if !rapidsnark_path.exists() {
+        let rapidsnark_script_path = Path::new(&out_dir).join(Path::new("download_rapidsnark.sh"));
+        fs::write(&rapidsnark_script_path, RAPIDSNARK_DOWNLOAD_SCRIPT)
+            .expect("Failed to write build script");
+        Command::new("sh")
+            .arg(rapidsnark_script_path.to_str().unwrap())
+            .spawn()
+            .expect("Failed to spawn rapidsnark download")
+            .wait()
+            .expect("rapidsnark download errored");
+    }
+    let absolute_lib_path = if rapidsnark_path.join(&target).exists() {
+        rapidsnark_path.join(&target)
     } else {
-        rapidsnark_dir.join(arch)
+        rapidsnark_path.join(arch)
     };
-
     let compiler = cc::Build::new().get_compiler();
     let cpp_stdlib = if compiler.is_like_clang() {
         "c++"

crates/download_rapidsnark.sh

@@ -0,0 +1,31 @@
+#!/bin/sh
+
+# Exit on error
+set -e
+
+# OUT_DIR is specified by the rust build environment
+if [ -z $OUT_DIR ]; then
+    echo "OUT_DIR not specified"
+    exit 1
+fi
+# TARGET is specified by the rust build environment
+if [ -z $TARGET ]; then
+    echo "TARGET not specified"
+    exit 1
+fi
+BUILD_DIR=$OUT_DIR/rapidsnark
+mkdir -p $BUILD_DIR
+
+download_and_unzip() {
+    local target="$1"
+    local zip_file="$BUILD_DIR/$target.zip"
+    curl -L -o $zip_file https://rapidsnark.zkmopro.org/$target.zip
+    unzip $zip_file -d $BUILD_DIR
+}
+
+download_and_unzip $TARGET
+# Check if curl was successful
+if [ $? -ne 0 ]; then
+    arch=$(echo "$TARGET" | cut -d'-' -f1)
+    download_and_unzip $arch
+fi

crates/rapidsnark/README.md

@@ -1,3 +0,0 @@
-Built from [here](https://github.com/chancehudson/rapidsnark/tree/rust-ffi). This is built into static libraries and then linked into the rust project. Importantly we need to compile static libraries for each platform we intend to support.
-
-Linking static libraries instead of compiling from c++ source should make it easier to maintain the `build.rs` script.