CMake: Improve building without hunter (#601)

Signed-off-by: Garrett Brown <eigendude@gmail.com>

Author: eigendude

cmake/dependencies.cmake

@@ -1,6 +1,11 @@
 # hunter dependencies
 # https://docs.hunter.sh/en/latest/packages/
 
+# Append local modules path if Hunter is not enabled
+if (NOT HUNTER_ENABLED)
+  list(APPEND CMAKE_MODULE_PATH ${PROJECT_SOURCE_DIR}/cmake/modules)
+endif()
+
 if (TESTING)
   # https://docs.hunter.sh/en/latest/packages/pkg/GTest.html
   hunter_add_package(GTest)
@@ -41,7 +46,12 @@ find_package(Boost.DI CONFIG REQUIRED)
 
 # https://docs.hunter.sh/en/latest/packages/pkg/leveldb.html
 hunter_add_package(leveldb)
-find_package(leveldb CONFIG REQUIRED)
+if (HUNTER_ENABLED)
+  find_package(leveldb CONFIG REQUIRED)
+else()
+  find_package(leveldb REQUIRED)
+  include_directories(${LEVELDB_INCLUDE_DIRS})
+endif()
 
 # https://github.com/soramitsu/libp2p
 hunter_add_package(libp2p)
@@ -58,7 +68,12 @@ find_package(fmt CONFIG REQUIRED)
 
 # https://docs.hunter.sh/en/latest/packages/pkg/cppcodec.html
 hunter_add_package(cppcodec)
-find_package(cppcodec CONFIG REQUIRED)
+if (HUNTER_ENABLED)
+  find_package(cppcodec CONFIG REQUIRED)
+else()
+  find_package(cppcodec REQUIRED)
+  include_directories(${CPPCODEC_INCLUDE_DIRS})
+endif()
 
 # http://rapidjson.org
 hunter_add_package(RapidJSON)
@@ -73,3 +88,9 @@ find_package(libarchive CONFIG REQUIRED)
 
 hunter_add_package(prometheus-cpp)
 find_package(prometheus-cpp CONFIG REQUIRED)
+
+# Add filecoin_ffi target if building without git submodules
+if (NOT BUILD_INTERNAL_DEPS)
+  find_package(filecoin_ffi REQUIRED)
+  include_directories(${FILECOIN_FFI_INCLUDE_DIRS})
+endif()

cmake/modules/Findcppcodec.cmake

@@ -0,0 +1,20 @@
+#.rst:
+# Findcppcodec.cmake
+# ------------------
+# Try to find cppcodec
+#
+# This will define the following variables:
+#
+# CPPCODEC_FOUND - system has cppcodec
+# CPPCODEC_INCLUDE_DIRS - cppcodec include directories
+#
+
+find_package(PkgConfig)
+if (PKG_CONFIG_FOUND)
+  pkg_check_modules(PC_CPPCODEC cppcodec)
+endif()
+
+if (PC_CPPCODEC_FOUND)
+  set(CPPCODEC_FOUND "${PC_CPPCODEC_FOUND}")
+  set(CPPCODEC_INCLUDE_DIRS "${PC_CPPCODEC_INCLUDEDIR}")
+endif()

cmake/modules/Findfilecoin_ffi.cmake

@@ -0,0 +1,57 @@
+#.rst:
+# Findfilecoin_ffi.cmake
+# -----------
+# Finds the Filecoin FFI library
+#
+# This will define the following variables:
+#
+#   FILECOIN_FFI_FOUND        -  system has filecoin_ffi
+#   FILECOIN_FFI_INCLUDE_DIRS -  filecoin_ffi include directories
+#   FILECOIN_FFI_LIBRARY      -  library needed to use filecoin_ffi
+#
+# and the following imported targets:
+#
+#   filecoin_ffi   - The filecoin_ffi library
+#
+
+find_package(PkgConfig REQUIRED)
+
+find_path(FILECOIN_FFI_INCLUDE_DIR
+  NAMES filecoin-ffi/filcrypto.h
+  HINTS "${FILECOIN_FFI_ROOT_DIR}" "$ENV{FILECOIN_FFI_ROOT_DIR}"
+  PATH_SUFFIXES include
+)
+
+find_library(FILECOIN_FFI_LIBRARY
+  NAMES filcrypto
+  HINTS "${FILECOIN_FFI_ROOT_DIR}" "$ENV{FILECOIN_FFI_ROOT_DIR}"
+  PATH_SUFFIXES "${LIBRARY_PATH_PREFIX}"
+)
+message(FALAL_ERROR "${LIBRARY_PATH_PREFIX}")
+
+pkg_check_modules(PKG_FILECOIN IMPORTED_TARGET filcrypto)
+
+if (PKG_FILECOIN_FOUND)
+  set(FILECOIN_FFI_FOUND "${PKG_FILECOIN_FOUND}")
+  set(FILECOIN_FFI_INCLUDE_DIRS "${FILECOIN_FFI_INCLUDE_DIR}")
+  set(FILECOIN_FFI_LIBRARIES "${FILECOIN_FFI_LIBRARY}")
+
+  add_library(filecoin_ffi
+    STATIC
+    IMPORTED
+    GLOBAL
+  )
+
+  set_target_properties(filecoin_ffi
+    PROPERTIES
+      INTERFACE_INCLUDE_DIRECTORIES "${FILECOIN_FFI_INCLUDE_DIR}"
+      IMPORTED_LOCATION "${FILECOIN_FFI_LIBRARY}"
+  )
+
+  target_link_libraries(filecoin_ffi
+    INTERFACE PkgConfig::PKG_FILECOIN
+  )
+endif()
+
+mark_as_advanced(FILECOIN_FFI_INCLUDE_DIR)
+mark_as_advanced(FILECOIN_FFI_LIBRARY)

cmake/modules/Findleveldb.cmake

@@ -0,0 +1,54 @@
+#.rst:
+# Findleveldb.cmake
+# -----------
+# Finds the leveldb library
+#
+# This will define the following variables:
+#
+#   LEVELDB_FOUND        -  system has leveldb
+#   LEVELDB_INCLUDE_DIRS -  leveldb include directories
+#   LEVELDB_LIBRARIES    -  libraries needed to use leveldb
+#
+# and the following imported targets:
+#
+#   leveldb::leveldb   - The leveldb library
+#
+
+include(FindPackageHandleStandardArgs)
+
+find_path(
+  LEVELDB_INCLUDE_DIR
+  NAMES leveldb/db.h
+  HINTS "${LEVELDB_ROOT_DIR}" "$ENV{LEVELDB_ROOT_DIR}"
+  PATH_SUFFIXES include
+)
+
+find_library(
+  LEVELDB_LIBRARY
+  NAMES leveldb
+  HINTS "${LEVELDB_ROOT_DIR}" "$ENV{LEVELDB_ROOT_DIR}"
+  PATH_SUFFIXES "${LIBRARY_PATH_PREFIX}"
+)
+
+find_package_handle_standard_args(
+  leveldb
+  DEFAULT_MSG
+    LEVELDB_INCLUDE_DIR
+    LEVELDB_LIBRARY
+)
+
+if (LEVELDB_FOUND)
+  set(LEVELDB_INCLUDE_DIRS "${LEVELDB_INCLUDE_DIR}")
+  set(LEVELDB_LIBRARIES "${LEVELDB_LIBRARY}")
+
+  if (NOT TARGET leveldb::leveldb)
+    add_library(leveldb::leveldb UNKNOWN IMPORTED)
+    set_target_properties(leveldb::leveldb PROPERTIES
+      INTERFACE_INCLUDE_DIRECTORIES "${LEVELDB_INCLUDE_DIR}"
+      IMPORTED_LOCATION "${LEVELDB_LIBRARY}"
+    )
+  endif()
+endif()
+
+mark_as_advanced(LEVELDB_INCLUDE_DIR)
+mark_as_advanced(LEVELDB_LIBRARY)