Abstract sys crate build.

rust/Cargo.lock

@@ -151,6 +151,15 @@ version = "0.4.29"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "5e5032e24019045c762d3c0f28f5b6b8bbf38563a65908389bf7978758920897"
 
+[[package]]
+name = "logos-blockchain-circuits-build"
+version = "0.4.2"
+dependencies = [
+ "flate2",
+ "tar",
+ "ureq",
+]
+
 [[package]]
 name = "logos-blockchain-circuits-common"
 version = "0.4.2"
@@ -162,44 +171,36 @@ dependencies = [
 name = "logos-blockchain-circuits-poc-sys"
 version = "0.4.2"
 dependencies = [
- "flate2",
+ "logos-blockchain-circuits-build",
  "logos-blockchain-circuits-common",
  "logos-blockchain-circuits-types",
- "tar",
- "ureq",
 ]
 
 [[package]]
 name = "logos-blockchain-circuits-pol-sys"
 version = "0.4.2"
 dependencies = [
- "flate2",
+ "logos-blockchain-circuits-build",
  "logos-blockchain-circuits-common",
  "logos-blockchain-circuits-types",
- "tar",
- "ureq",
 ]
 
 [[package]]
 name = "logos-blockchain-circuits-poq-sys"
 version = "0.4.2"
 dependencies = [
- "flate2",
+ "logos-blockchain-circuits-build",
  "logos-blockchain-circuits-common",
  "logos-blockchain-circuits-types",
- "tar",
- "ureq",
 ]
 
 [[package]]
 name = "logos-blockchain-circuits-signature-sys"
 version = "0.4.2"
 dependencies = [
- "flate2",
+ "logos-blockchain-circuits-build",
  "logos-blockchain-circuits-common",
  "logos-blockchain-circuits-types",
- "tar",
- "ureq",
 ]
 
 [[package]]

rust/Cargo.toml

@@ -10,6 +10,7 @@ version = "0.4.2"
 
 [workspace]
 members = [
+  "logos-blockchain-circuits-build",
   "logos-blockchain-circuits-poc-sys",
   "logos-blockchain-circuits-pol-sys",
   "logos-blockchain-circuits-poq-sys",
@@ -19,6 +20,22 @@ members = [
 ]
 resolver = "3"
 
+[workspace.dependencies]
+# Internal
+lbc-common = { default-features = false, package = "logos-blockchain-circuits-common", path = "./logos-blockchain-circuits-common" }
+lbc-build = { package = "logos-blockchain-circuits-build", path = "./logos-blockchain-circuits-build" }
+lbc-poc-sys = { default-features = false, package = "logos-blockchain-circuits-poc-sys", path = "./logos-blockchain-circuits-poc-sys" }
+lbc-pol-sys = { default-features = false, package = "logos-blockchain-circuits-pol-sys", path = "./logos-blockchain-circuits-pol-sys" }
+lbc-poq-sys = { default-features = false, package = "logos-blockchain-circuits-poq-sys", path = "./logos-blockchain-circuits-poq-sys" }
+lbc-signature-sys = { default-features = false, package = "logos-blockchain-circuits-signature-sys", path = "./logos-blockchain-circuits-signature-sys" }
+lbc-types = { default-features = false, package = "logos-blockchain-circuits-types", path = "./logos-blockchain-circuits-types" }
+
+# External
+flate2 = "^1"
+libc = "^0.2"
+tar = "^0.4"
+ureq = "^3.3"
+
 # Sourced from https://github.com/logos-co/nomos/blob/main/Cargo.toml
 [workspace.lints.clippy]
 
@@ -170,18 +187,3 @@ trivial_casts = { level = "allow" }
 unreachable_pub = { level = "allow" }
 unsafe_code = { level = "allow" }
 variant_size_differences = { level = "allow" }
-
-[workspace.dependencies]
-# Internal
-lbc-poc-sys = { default-features = false, package = "logos-blockchain-circuits-poc-sys", path = "./logos-blockchain-circuits-poc-sys" }
-lbc-pol-sys = { default-features = false, package = "logos-blockchain-circuits-pol-sys", path = "./logos-blockchain-circuits-pol-sys" }
-lbc-poq-sys = { default-features = false, package = "logos-blockchain-circuits-poq-sys", path = "./logos-blockchain-circuits-poq-sys" }
-lbc-signature-sys = { default-features = false, package = "logos-blockchain-circuits-signature-sys", path = "./logos-blockchain-circuits-signature-sys" }
-lbc-types = { default-features = false, package = "logos-blockchain-circuits-types", path = "./logos-blockchain-circuits-types" }
-lbc-common = { default-features = false, package = "logos-blockchain-circuits-common", path = "./logos-blockchain-circuits-common" }
-
-# External
-flate2 = "^1"
-libc = "^0.2"
-tar = "^0.4"
-ureq = "^3.3"

rust/logos-blockchain-circuits-build/Cargo.toml

@@ -0,0 +1,18 @@
+[package]
+name = "logos-blockchain-circuits-build"
+categories.workspace = true
+description = "Shared build script logic for Logos Blockchain Circuits sys crates."
+edition.workspace = true
+keywords.workspace = true
+license.workspace = true
+readme.workspace = true
+repository.workspace = true
+version.workspace = true
+
+[lints]
+workspace = true
+
+[dependencies]
+flate2 = { workspace = true }
+tar = { workspace = true }
+ureq = { workspace = true }

rust/logos-blockchain-circuits-build/src/lib.rs

@@ -0,0 +1,108 @@
+use std::path::{Path, PathBuf};
+
+use ureq::Body;
+use ureq::http::Response;
+
+static REPO: &str = "logos-blockchain/logos-blockchain-circuits";
+static ARTIFACT_PREFIX: &str = "logos-blockchain-circuits";
+
+fn get_artifact_name(version: &str, os: &str, arch: &str) -> String {
+    format!("{ARTIFACT_PREFIX}-v{version}-{os}-{arch}")
+}
+
+fn get_artifact_url(version: &str, os: &str, arch: &str) -> String {
+    let artifact = get_artifact_name(version, os, arch);
+    let artifact_tar_gz = format!("{artifact}.tar.gz");
+    format!("https://github.com/{REPO}/releases/download/v{version}/{artifact_tar_gz}")
+}
+
+fn fetch_library(version: &str, os: &str, arch: &str, lib_var_name: &str) -> Response<Body> {
+    let url = get_artifact_url(version, os, arch);
+    // We skip checksum verification intentionally.
+    // Hardcoded hashes would protect against a silently replaced release asset, but require a
+    // two-step release (build → hash → commit → tag) which feels overkill for a first-party
+    // library.
+    ureq::get(&url).call().unwrap_or_else(|error| {
+        panic!(
+            "Failed to download a prebuilt library for {os}-{arch} v{version}: {error}. \
+             Set {lib_var_name} to point to a local build instead."
+        )
+    })
+}
+
+fn unpack_library(
+    response: Response<Body>,
+    circuit_name: &str,
+    version: &str,
+    os: &str,
+    arch: &str,
+    output_dir: &Path,
+) -> PathBuf {
+    let gz_decoder = flate2::read::GzDecoder::new(response.into_body().into_reader());
+    let mut archive = tar::Archive::new(gz_decoder);
+    archive
+        .unpack(output_dir)
+        .expect("Failed to unpack the downloaded archive.");
+
+    let unpacked_artifact_path = output_dir.join(get_artifact_name(version, os, arch));
+    let unpacked_library_directory = unpacked_artifact_path.join(circuit_name);
+
+    assert!(
+        unpacked_library_directory.is_dir(),
+        "Failed to find the unpacked library at {}",
+        unpacked_library_directory.display()
+    );
+
+    unpacked_library_directory
+}
+
+fn provision_library(circuit_name: &str, lib_var_name: &str) -> PathBuf {
+    let version = env!("CARGO_PKG_VERSION");
+    let os = std::env::var("CARGO_CFG_TARGET_OS").unwrap();
+    let arch = std::env::var("CARGO_CFG_TARGET_ARCH").unwrap();
+    let out_dir = PathBuf::from(std::env::var("OUT_DIR").unwrap());
+
+    let expected_library_directory = out_dir
+        .join(get_artifact_name(version, &os, &arch))
+        .join(circuit_name);
+    if expected_library_directory.is_dir() {
+        println!(
+            "Found an existing library at {}. Reusing it.",
+            expected_library_directory.display()
+        );
+        return expected_library_directory;
+    }
+
+    let response = fetch_library(version, &os, &arch, lib_var_name);
+    unpack_library(response, circuit_name, version, &os, &arch, &out_dir)
+}
+
+pub fn build(circuit_name: &str, lib_var_name: &str) {
+    println!("cargo:rerun-if-env-changed={lib_var_name}");
+    println!("cargo:rerun-if-env-changed=CARGO_PKG_VERSION");
+    println!("cargo:rerun-if-changed=Cargo.toml");
+    println!("cargo:rerun-if-changed=build.rs");
+
+    let lib_dir = std::env::var(lib_var_name).map_or_else(
+        |_| provision_library(circuit_name, lib_var_name),
+        |lib_dir| {
+            println!("Using a library directory from {lib_var_name}: {lib_dir}");
+            let lib_dir_path = PathBuf::from(lib_dir);
+            assert!(
+                lib_dir_path.is_dir(),
+                "The library directory specified in {lib_var_name} at {} does not exist.",
+                lib_dir_path.display()
+            );
+            lib_dir_path
+        },
+    );
+
+    let lib_dir = lib_dir
+        .to_str()
+        .expect("Failed to convert the library directory path to a string");
+    println!("cargo:rustc-env={lib_var_name}={lib_dir}");
+    println!("cargo:rustc-link-search=native={lib_dir}");
+    println!("cargo:rustc-link-lib=static={circuit_name}");
+    println!("cargo:rustc-link-lib=stdc++");
+    println!("cargo:rustc-link-lib=gmp");
+}

rust/logos-blockchain-circuits-poc-sys/Cargo.toml

@@ -17,6 +17,4 @@ lbc-types = { workspace = true }
 lbc-common = { workspace = true }
 
 [build-dependencies]
-flate2 = { workspace = true }
-tar = { workspace = true }
-ureq = { workspace = true }
+lbc-build = { workspace = true }

rust/logos-blockchain-circuits-poc-sys/build.rs

@@ -1,107 +1,3 @@
-use std::path::{Path, PathBuf};
-use ureq::Body;
-use ureq::http::Response;
-
-static CIRCUIT_NAME: &str = "poc";
-static LIB_VAR_NAME: &str = "LBC_POC_LIB_DIR";
-
-fn get_artifact_name(version: &str, os: &str, arch: &str) -> String {
-    format!("logos-blockchain-circuits-v{version}-{os}-{arch}")
-}
-
-fn get_artifact_url(version: &str, os: &str, arch: &str) -> String {
-    let artifact = get_artifact_name(version, os, arch);
-    let artifact_tar_gz = format!("{artifact}.tar.gz");
-    format!(
-        "https://github.com/logos-blockchain/logos-blockchain-circuits/releases/download/v{version}/{artifact_tar_gz}"
-    )
-}
-
-fn fetch_library(version: &str, os: &str, arch: &str) -> Response<Body> {
-    let url = get_artifact_url(version, os, arch);
-    // We skip checksum verification intentionally. Hardcoded hashes would protect against a
-    // silently replaced release asset, but require a two-step release (build → hash → commit →
-    // tag) which we consider too costly for now.
-    ureq::get(&url).call().unwrap_or_else(|error| {
-        panic!(
-            "Failed to download a prebuilt library for {os}-{arch} v{version}: {error}. \
-                 Set {LIB_VAR_NAME} to point to a local build instead."
-        )
-    })
-}
-
-fn unpack_library(
-    response: Response<Body>,
-    version: &str,
-    os: &str,
-    arch: &str,
-    output_dir: &Path,
-) -> PathBuf {
-    let gz_decoder = flate2::read::GzDecoder::new(response.into_body().into_reader());
-    let mut archive = tar::Archive::new(gz_decoder);
-    archive
-        .unpack(output_dir)
-        .expect("Failed to unpack the downloaded archive.");
-
-    let unpacked_artifact_path = output_dir.join(get_artifact_name(version, os, arch));
-    let unpacked_library_directory = unpacked_artifact_path.join(CIRCUIT_NAME);
-
-    assert!(
-        unpacked_library_directory.is_dir(),
-        "Failed to find the unpacked library at {}",
-        unpacked_library_directory.display()
-    );
-
-    unpacked_library_directory
-}
-
-fn provision_library() -> PathBuf {
-    let version = env!("CARGO_PKG_VERSION");
-    let os = std::env::var("CARGO_CFG_TARGET_OS").unwrap();
-    let arch = std::env::var("CARGO_CFG_TARGET_ARCH").unwrap();
-    let out_dir = PathBuf::from(std::env::var("OUT_DIR").unwrap());
-
-    let expected_library_directory = out_dir
-        .join(get_artifact_name(version, &os, &arch))
-        .join(CIRCUIT_NAME);
-    if expected_library_directory.exists() {
-        println!(
-            "Found an existing library at {}. Reusing it.",
-            expected_library_directory.display()
-        );
-        return expected_library_directory;
-    }
-
-    let response = fetch_library(version, &os, &arch);
-    unpack_library(response, version, &os, &arch, &out_dir)
-}
-
 fn main() {
-    println!("cargo:rerun-if-env-changed={LIB_VAR_NAME}");
-    println!("cargo:rerun-if-env-changed=CARGO_PKG_VERSION");
-    println!("cargo:rerun-if-changed=Cargo.toml");
-    println!("cargo:rerun-if-changed=build.rs");
-
-    let lib_dir = std::env::var(LIB_VAR_NAME).map_or_else(
-        |_| provision_library(),
-        |lib_dir| {
-            println!("Using a library directory from {LIB_VAR_NAME}: {lib_dir}");
-            let lib_dir_path = PathBuf::from(lib_dir);
-            assert!(
-                lib_dir_path.is_dir(),
-                "The library directory specified in {LIB_VAR_NAME} at {} does not exist.",
-                lib_dir_path.display()
-            );
-            lib_dir_path
-        },
-    );
-
-    let lib_dir = lib_dir
-        .to_str()
-        .expect("Failed to convert the library directory path to a string");
-    println!("cargo:rustc-env={LIB_VAR_NAME}={lib_dir}");
-    println!("cargo:rustc-link-search=native={lib_dir}");
-    println!("cargo:rustc-link-lib=static={CIRCUIT_NAME}");
-    println!("cargo:rustc-link-lib=stdc++");
-    println!("cargo:rustc-link-lib=gmp");
+    lbc_build::build("poc", "LBC_POC_LIB_DIR");
 }

rust/logos-blockchain-circuits-pol-sys/Cargo.toml

@@ -17,6 +17,4 @@ lbc-types = { workspace = true }
 lbc-common = { workspace = true }
 
 [build-dependencies]
-flate2 = { workspace = true }
-tar = { workspace = true }
-ureq = { workspace = true }
+lbc-build = { workspace = true }

rust/logos-blockchain-circuits-pol-sys/build.rs

@@ -1,107 +1,3 @@
-use std::path::{Path, PathBuf};
-use ureq::Body;
-use ureq::http::Response;
-
-static CIRCUIT_NAME: &str = "pol";
-static LIB_VAR_NAME: &str = "LBC_POL_LIB_DIR";
-
-fn get_artifact_name(version: &str, os: &str, arch: &str) -> String {
-    format!("logos-blockchain-circuits-v{version}-{os}-{arch}")
-}
-
-fn get_artifact_url(version: &str, os: &str, arch: &str) -> String {
-    let artifact = get_artifact_name(version, os, arch);
-    let artifact_tar_gz = format!("{artifact}.tar.gz");
-    format!(
-        "https://github.com/logos-blockchain/logos-blockchain-circuits/releases/download/v{version}/{artifact_tar_gz}"
-    )
-}
-
-fn fetch_library(version: &str, os: &str, arch: &str) -> Response<Body> {
-    let url = get_artifact_url(version, os, arch);
-    // We skip checksum verification intentionally. Hardcoded hashes would protect against a
-    // silently replaced release asset, but require a two-step release (build → hash → commit →
-    // tag) which we consider too costly for now.
-    ureq::get(&url).call().unwrap_or_else(|error| {
-        panic!(
-            "Failed to download a prebuilt library for {os}-{arch} v{version}: {error}. \
-                 Set {LIB_VAR_NAME} to point to a local build instead."
-        )
-    })
-}
-
-fn unpack_library(
-    response: Response<Body>,
-    version: &str,
-    os: &str,
-    arch: &str,
-    output_dir: &Path,
-) -> PathBuf {
-    let gz_decoder = flate2::read::GzDecoder::new(response.into_body().into_reader());
-    let mut archive = tar::Archive::new(gz_decoder);
-    archive
-        .unpack(output_dir)
-        .expect("Failed to unpack the downloaded archive.");
-
-    let unpacked_artifact_path = output_dir.join(get_artifact_name(version, os, arch));
-    let unpacked_library_directory = unpacked_artifact_path.join(CIRCUIT_NAME);
-
-    assert!(
-        unpacked_library_directory.is_dir(),
-        "Failed to find the unpacked library at {}",
-        unpacked_library_directory.display()
-    );
-
-    unpacked_library_directory
-}
-
-fn provision_library() -> PathBuf {
-    let version = env!("CARGO_PKG_VERSION");
-    let os = std::env::var("CARGO_CFG_TARGET_OS").unwrap();
-    let arch = std::env::var("CARGO_CFG_TARGET_ARCH").unwrap();
-    let out_dir = PathBuf::from(std::env::var("OUT_DIR").unwrap());
-
-    let expected_library_directory = out_dir
-        .join(get_artifact_name(version, &os, &arch))
-        .join(CIRCUIT_NAME);
-    if expected_library_directory.exists() {
-        println!(
-            "Found an existing library at {}. Reusing it.",
-            expected_library_directory.display()
-        );
-        return expected_library_directory;
-    }
-
-    let response = fetch_library(version, &os, &arch);
-    unpack_library(response, version, &os, &arch, &out_dir)
-}
-
 fn main() {
-    println!("cargo:rerun-if-env-changed={LIB_VAR_NAME}");
-    println!("cargo:rerun-if-env-changed=CARGO_PKG_VERSION");
-    println!("cargo:rerun-if-changed=Cargo.toml");
-    println!("cargo:rerun-if-changed=build.rs");
-
-    let lib_dir = std::env::var(LIB_VAR_NAME).map_or_else(
-        |_| provision_library(),
-        |lib_dir| {
-            println!("Using a library directory from {LIB_VAR_NAME}: {lib_dir}");
-            let lib_dir_path = PathBuf::from(lib_dir);
-            assert!(
-                lib_dir_path.is_dir(),
-                "The library directory specified in {LIB_VAR_NAME} at {} does not exist.",
-                lib_dir_path.display()
-            );
-            lib_dir_path
-        },
-    );
-
-    let lib_dir = lib_dir
-        .to_str()
-        .expect("Failed to convert the library directory path to a string");
-    println!("cargo:rustc-env={LIB_VAR_NAME}={lib_dir}");
-    println!("cargo:rustc-link-search=native={lib_dir}");
-    println!("cargo:rustc-link-lib=static={CIRCUIT_NAME}");
-    println!("cargo:rustc-link-lib=stdc++");
-    println!("cargo:rustc-link-lib=gmp");
+    lbc_build::build("pol", "LBC_POL_LIB_DIR");
 }

rust/logos-blockchain-circuits-poq-sys/Cargo.toml

@@ -17,6 +17,4 @@ lbc-types = { workspace = true }
 lbc-common = { workspace = true }
 
 [build-dependencies]
-flate2 = { workspace = true }
-tar = { workspace = true }
-ureq = { workspace = true }
+lbc-build = { workspace = true }

rust/logos-blockchain-circuits-poq-sys/build.rs

@@ -1,118 +1,3 @@
-use std::path::{Path, PathBuf};
-use ureq::Body;
-use ureq::http::Response;
-
-static CIRCUIT_NAME: &str = "poq";
-static LIB_VAR_NAME: &str = "LBC_POQ_LIB_DIR";
-
-fn get_artifact_name(version: &str, os: &str, arch: &str) -> String {
-    format!("logos-blockchain-circuits-v{version}-{os}-{arch}")
-}
-
-fn get_artifact_url(version: &str, os: &str, arch: &str) -> String {
-    let artifact = get_artifact_name(version, os, arch);
-    let artifact_tar_gz = format!("{artifact}.tar.gz");
-    format!(
-        "https://github.com/logos-blockchain/logos-blockchain-circuits/releases/download/v{version}/{artifact_tar_gz}"
-    )
-}
-
-fn fetch_library(version: &str, os: &str, arch: &str) -> Response<Body> {
-    let url = get_artifact_url(version, os, arch);
-    // We skip checksum verification intentionally. Hardcoded hashes would protect against a
-    // silently replaced release asset, but require a two-step release (build → hash → commit →
-    // tag) which we consider too costly for now.
-    ureq::get(&url).call().unwrap_or_else(|error| {
-        panic!(
-            "Failed to download a prebuilt library for {os}-{arch} v{version}: {error}. \
-                 Set {LIB_VAR_NAME} to point to a local build instead."
-        )
-    })
-}
-
-fn unpack_library(
-    response: Response<Body>,
-    version: &str,
-    os: &str,
-    arch: &str,
-    output_dir: &Path,
-) -> PathBuf {
-    let gz_decoder = flate2::read::GzDecoder::new(response.into_body().into_reader());
-    let mut archive = tar::Archive::new(gz_decoder);
-    archive
-        .unpack(output_dir)
-        .expect("Failed to unpack the downloaded archive.");
-
-    let unpacked_artifact_path = output_dir.join(get_artifact_name(version, os, arch));
-    let unpacked_library_directory = unpacked_artifact_path.join(CIRCUIT_NAME);
-
-    assert!(
-        unpacked_library_directory.is_dir(),
-        "Failed to find the unpacked library at {}",
-        unpacked_library_directory.display()
-    );
-
-    unpacked_library_directory
-}
-
-fn provision_library() -> PathBuf {
-    let version = env!("CARGO_PKG_VERSION");
-    let os = std::env::var("CARGO_CFG_TARGET_OS").unwrap();
-    let arch = std::env::var("CARGO_CFG_TARGET_ARCH").unwrap();
-    let out_dir = PathBuf::from(std::env::var("OUT_DIR").unwrap());
-
-    let expected_library_directory = out_dir
-        .join(get_artifact_name(version, &os, &arch))
-        .join(CIRCUIT_NAME);
-    if expected_library_directory.exists() {
-        println!(
-            "Found an existing library at {}. Reusing it.",
-            expected_library_directory.display()
-        );
-        return expected_library_directory;
-    }
-
-    let response = fetch_library(version, &os, &arch);
-    unpack_library(response, version, &os, &arch, &out_dir)
-}
-
-/// Configures the corresponding witness generator library.
-///
-/// # Arguments
-///
-/// - `LIB_VAR_NAME` is the name of the environment variable that points to the directory
-///   containing the library. If it is not set, the library will be downloaded from GitHub.
-///
-/// # Output
-///
-/// - `LIB_VAR_NAME` is always emitted so internals can refer to it regardless of whether the
-///   library was downloaded or provided by the user.
 fn main() {
-    println!("cargo:rerun-if-env-changed={LIB_VAR_NAME}");
-    println!("cargo:rerun-if-env-changed=CARGO_PKG_VERSION");
-    println!("cargo:rerun-if-changed=Cargo.toml");
-    println!("cargo:rerun-if-changed=build.rs");
-
-    let lib_dir = std::env::var(LIB_VAR_NAME).map_or_else(
-        |_| provision_library(),
-        |lib_dir| {
-            println!("Using a library directory from {LIB_VAR_NAME}: {lib_dir}");
-            let lib_dir_path = PathBuf::from(lib_dir);
-            assert!(
-                lib_dir_path.is_dir(),
-                "The library directory specified in {LIB_VAR_NAME} at {} does not exist.",
-                lib_dir_path.display()
-            );
-            lib_dir_path
-        },
-    );
-
-    let lib_dir = lib_dir
-        .to_str()
-        .expect("Failed to convert the library directory path to a string");
-    println!("cargo:rustc-env={LIB_VAR_NAME}={lib_dir}");
-    println!("cargo:rustc-link-search=native={lib_dir}");
-    println!("cargo:rustc-link-lib=static={CIRCUIT_NAME}");
-    println!("cargo:rustc-link-lib=stdc++");
-    println!("cargo:rustc-link-lib=gmp");
+    lbc_build::build("poq", "LBC_POQ_LIB_DIR");
 }

rust/logos-blockchain-circuits-signature-sys/Cargo.toml

@@ -17,6 +17,4 @@ lbc-types = { workspace = true }
 lbc-common = { workspace = true }
 
 [build-dependencies]
-flate2 = { workspace = true }
-tar = { workspace = true }
-ureq = { workspace = true }
+lbc-build = { workspace = true }

rust/logos-blockchain-circuits-signature-sys/build.rs

@@ -1,107 +1,3 @@
-use std::path::{Path, PathBuf};
-use ureq::Body;
-use ureq::http::Response;
-
-static CIRCUIT_NAME: &str = "signature";
-static LIB_VAR_NAME: &str = "LBC_SIGNATURE_LIB_DIR";
-
-fn get_artifact_name(version: &str, os: &str, arch: &str) -> String {
-    format!("logos-blockchain-circuits-v{version}-{os}-{arch}")
-}
-
-fn get_artifact_url(version: &str, os: &str, arch: &str) -> String {
-    let artifact = get_artifact_name(version, os, arch);
-    let artifact_tar_gz = format!("{artifact}.tar.gz");
-    format!(
-        "https://github.com/logos-blockchain/logos-blockchain-circuits/releases/download/v{version}/{artifact_tar_gz}"
-    )
-}
-
-fn fetch_library(version: &str, os: &str, arch: &str) -> Response<Body> {
-    let url = get_artifact_url(version, os, arch);
-    // We skip checksum verification intentionally. Hardcoded hashes would protect against a
-    // silently replaced release asset, but require a two-step release (build → hash → commit →
-    // tag) which we consider too costly for now.
-    ureq::get(&url).call().unwrap_or_else(|error| {
-        panic!(
-            "Failed to download a prebuilt library for {os}-{arch} v{version}: {error}. \
-                 Set {LIB_VAR_NAME} to point to a local build instead."
-        )
-    })
-}
-
-fn unpack_library(
-    response: Response<Body>,
-    version: &str,
-    os: &str,
-    arch: &str,
-    output_dir: &Path,
-) -> PathBuf {
-    let gz_decoder = flate2::read::GzDecoder::new(response.into_body().into_reader());
-    let mut archive = tar::Archive::new(gz_decoder);
-    archive
-        .unpack(output_dir)
-        .expect("Failed to unpack the downloaded archive.");
-
-    let unpacked_artifact_path = output_dir.join(get_artifact_name(version, os, arch));
-    let unpacked_library_directory = unpacked_artifact_path.join(CIRCUIT_NAME);
-
-    assert!(
-        unpacked_library_directory.is_dir(),
-        "Failed to find the unpacked library at {}",
-        unpacked_library_directory.display()
-    );
-
-    unpacked_library_directory
-}
-
-fn provision_library() -> PathBuf {
-    let version = env!("CARGO_PKG_VERSION");
-    let os = std::env::var("CARGO_CFG_TARGET_OS").unwrap();
-    let arch = std::env::var("CARGO_CFG_TARGET_ARCH").unwrap();
-    let out_dir = PathBuf::from(std::env::var("OUT_DIR").unwrap());
-
-    let expected_library_directory = out_dir
-        .join(get_artifact_name(version, &os, &arch))
-        .join(CIRCUIT_NAME);
-    if expected_library_directory.exists() {
-        println!(
-            "Found an existing library at {}. Reusing it.",
-            expected_library_directory.display()
-        );
-        return expected_library_directory;
-    }
-
-    let response = fetch_library(version, &os, &arch);
-    unpack_library(response, version, &os, &arch, &out_dir)
-}
-
 fn main() {
-    println!("cargo:rerun-if-env-changed={LIB_VAR_NAME}");
-    println!("cargo:rerun-if-env-changed=CARGO_PKG_VERSION");
-    println!("cargo:rerun-if-changed=Cargo.toml");
-    println!("cargo:rerun-if-changed=build.rs");
-
-    let lib_dir = std::env::var(LIB_VAR_NAME).map_or_else(
-        |_| provision_library(),
-        |lib_dir| {
-            println!("Using a library directory from {LIB_VAR_NAME}: {lib_dir}");
-            let lib_dir_path = PathBuf::from(lib_dir);
-            assert!(
-                lib_dir_path.is_dir(),
-                "The library directory specified in {LIB_VAR_NAME} at {} does not exist.",
-                lib_dir_path.display()
-            );
-            lib_dir_path
-        },
-    );
-
-    let lib_dir = lib_dir
-        .to_str()
-        .expect("Failed to convert the library directory path to a string");
-    println!("cargo:rustc-env={LIB_VAR_NAME}={lib_dir}");
-    println!("cargo:rustc-link-search=native={lib_dir}");
-    println!("cargo:rustc-link-lib=static={CIRCUIT_NAME}");
-    println!("cargo:rustc-link-lib=stdc++");
-    println!("cargo:rustc-link-lib=gmp");
+    lbc_build::build("signature", "LBC_SIGNATURE_LIB_DIR");
 }