Allow offline builds of chiapos with local repos

.github/workflows/rust.yml

@@ -62,8 +62,9 @@ jobs:
 
       - name: Prepare for publish
         run: |
+          sh install-dependencies.sh
           mkdir rust-bindings/cpp
-          cp -r src lib tests uint128_t python-bindings c-bindings CMakeLists.txt rust-bindings/cpp
+          cp -r src lib tests uint128_t python-bindings c-bindings CMakeLists.txt thirdparty rust-bindings/cpp
 
       - name: Publish to crates.io (dry run)
         # We use `--allow-dirty` because the `cpp` folder is copied into the working directory.

.gitignore

@@ -33,3 +33,4 @@ cmake-build*
 *.tar.gz
 libs/
 target/
+thirdparty/

CMakeLists.txt

@@ -16,22 +16,32 @@ project(chiapos C CXX ASM)
 # CMake 3.14+
 include(FetchContent)
 
-if (${CMAKE_SYSTEM_NAME} MATCHES "FreeBSD")
-include(${CMAKE_INSTALL_PREFIX}/share/cmake/pybind11/pybind11Config.cmake)
+# Make sure to also update install-dependencies.sh with these hashes.
+option(BUILD_OFFLINE "Build offline, without fetching dependencies from Git" OFF)
+
+if (BUILD_OFFLINE)
+  FetchContent_Declare(pybind11 SOURCE_DIR "${CMAKE_CURRENT_LIST_DIR}/thirdparty/pybind11")
+  FetchContent_MakeAvailable(pybind11)
+elseif (${CMAKE_SYSTEM_NAME} MATCHES "FreeBSD")
+  include(${CMAKE_INSTALL_PREFIX}/share/cmake/pybind11/pybind11Config.cmake)
 else()
-FetchContent_Declare(
-  pybind11-src
-  GIT_REPOSITORY https://github.com/pybind/pybind11.git
-  GIT_TAG        v2.11.1
-)
-FetchContent_MakeAvailable(pybind11-src)
+  FetchContent_Declare(
+    pybind11
+    GIT_REPOSITORY https://github.com/pybind/pybind11.git
+    GIT_TAG        8a099e44b3d5f85b20f05828d919d2332a8de841 # v2.11.1
+  )
+  FetchContent_MakeAvailable(pybind11)
 endif()
 
-FetchContent_Declare(
-  cxxopts
-  GIT_REPOSITORY https://github.com/jarro2783/cxxopts.git
-  GIT_TAG        v3.1.1
-)
+if (BUILD_OFFLINE)
+  FetchContent_Declare(cxxopts SOURCE_DIR "${CMAKE_CURRENT_LIST_DIR}/thirdparty/cxxopts")
+else()
+  FetchContent_Declare(
+    cxxopts
+    GIT_REPOSITORY https://github.com/jarro2783/cxxopts.git
+    GIT_TAG        eb787304d67ec22f7c3a184ee8b4c481d04357fd # v3.1.1
+  )
+endif()
 FetchContent_MakeAvailable(cxxopts)
 
 option(CP_LINK_BLADEBIT_HARVESTER "Links libbladebit_harvester at build time instead of dynamically loading it." OFF)
@@ -53,11 +63,16 @@ if (${CP_BUILD_BLADEBIT_HARVESTER})
   FetchContent_MakeAvailable(bladebit)
 endif()
 
-FetchContent_Declare(
-  gulrak
-  GIT_REPOSITORY https://github.com/gulrak/filesystem.git
-  GIT_TAG        v1.5.14
-)
+if (BUILD_OFFLINE)
+  FetchContent_Declare(gulrak SOURCE_DIR "${CMAKE_CURRENT_LIST_DIR}/thirdparty/filesystem")
+  FetchContent_MakeAvailable(gulrak)
+else()
+  FetchContent_Declare(
+    gulrak
+    GIT_REPOSITORY https://github.com/gulrak/filesystem.git
+    GIT_TAG        8a2edd6d92ed820521d42c94d179462bf06b5ed3 # v1.5.14
+  )
+  endif()
 FetchContent_MakeAvailable(gulrak)
 
 set(FSE_LIB ${CMAKE_CURRENT_SOURCE_DIR}/lib/FiniteStateEntropy/lib)
@@ -128,11 +143,15 @@ add_executable(ProofOfSpace
     src/chacha8.c
 )
 
-FetchContent_Declare(
-  blake3
-  GIT_REPOSITORY https://github.com/BLAKE3-team/BLAKE3.git
-  GIT_TAG        1.5.0
-)
+if (BUILD_OFFLINE)
+  FetchContent_Declare(blake3 SOURCE_DIR "${CMAKE_CURRENT_LIST_DIR}/thirdparty/BLAKE3")
+else()
+  FetchContent_Declare(
+    blake3
+    GIT_REPOSITORY https://github.com/BLAKE3-team/BLAKE3.git
+    GIT_TAG        5aa53f07f7188a569cadfc5daf1522972d9a9630 # 1.5.0
+  )
+endif()
 
 FetchContent_GetProperties(blake3)
 if(NOT blake3_POPULATED)
@@ -167,11 +186,15 @@ IF (BUILD_STATIC_CHIAPOS_LIBRARY)
   target_include_directories(chiapos_static PUBLIC lib/include)
 ENDIF()
 
-FetchContent_Declare(
-  Catch2
-  GIT_REPOSITORY https://github.com/catchorg/Catch2.git
-  GIT_TAG        v3.5.2
-)
+if (BUILD_OFFLINE)
+  FetchContent_Declare(Catch2 SOURCE_DIR "${CMAKE_CURRENT_LIST_DIR}/thirdparty/Catch2")
+else()
+  FetchContent_Declare(
+    Catch2
+    GIT_REPOSITORY https://github.com/catchorg/Catch2.git
+    GIT_TAG        05e10dfccc28c7f973727c54f850237d07d5e10f # v3.5.2
+  )
+endif()
 FetchContent_MakeAvailable(Catch2)
 
 add_executable(RunTests

install-dependencies.sh

@@ -0,0 +1,36 @@
+#!/bin/bash
+set -e
+
+mkdir -p thirdparty
+cd thirdparty
+
+rm -rf pybind11 cxxopts filesystem BLAKE3 Catch2
+
+# Make sure to also update CMakeLists.txt with these hashes.
+
+git clone https://github.com/pybind/pybind11.git -b v2.11.1
+cd pybind11
+git checkout 8a099e44b3d5f85b20f05828d919d2332a8de841
+cd ..
+
+git clone https://github.com/jarro2783/cxxopts.git -b v3.1.1
+cd cxxopts
+git checkout eb787304d67ec22f7c3a184ee8b4c481d04357fd
+cd ..
+
+git clone https://github.com/gulrak/filesystem.git -b v1.5.14
+cd filesystem
+git checkout 8a2edd6d92ed820521d42c94d179462bf06b5ed3
+cd ..
+
+git clone https://github.com/BLAKE3-team/BLAKE3.git -b 1.5.0
+cd BLAKE3
+git checkout 5aa53f07f7188a569cadfc5daf1522972d9a9630
+cd ..
+
+git clone https://github.com/catchorg/Catch2.git -b v3.5.2
+cd Catch2
+git checkout 05e10dfccc28c7f973727c54f850237d07d5e10f
+cd ..
+
+cd ..

rust-bindings/build.rs

@@ -18,9 +18,19 @@ fn main() {
             .to_path_buf();
     }
 
+    let build_offline = cpp_dir.join("thirdparty").try_exists().unwrap();
+
     let dst = Config::new(cpp_dir.as_path())
         .build_target("chiapos_static")
         .define("BUILD_STATIC_CHIAPOS_LIBRARY", "ON")
+        .define(
+            "BUILD_OFFLINE",
+            if build_offline {
+                "ON".to_string()
+            } else {
+                "OFF".to_string()
+            },
+        )
         .build();
 
     let blake3_include_path = dst.join("build").join("_deps").join("blake3-src").join("c");