Modularize cmake build config

Builds/CMake/deps/Sqlite.cmake

@@ -0,0 +1,67 @@
+#[===================================================================[
+   NIH dep: sqlite
+#]===================================================================]
+
+ExternalProject_Add (sqlite3
+  PREFIX ${nih_cache_path}
+  # sqlite doesn't use git, but it provides versioned tarballs
+  URL https://www.sqlite.org/2018/sqlite-amalgamation-3260000.zip
+  # ^^^ version is apparent in the URL:  3260000 => 3.26.0
+  URL_HASH SHA256=de5dcab133aa339a4cf9e97c40aa6062570086d6085d8f9ad7bc6ddf8a52096e
+  # we wrote a very simple CMake file to build sqlite
+  # so that's what we copy here so that we can build with
+  # CMake. sqlite doesn't generally provided a build system
+  # for the single amalgamation source file.
+  PATCH_COMMAND
+    ${CMAKE_COMMAND} -E copy_if_different
+    ${CMAKE_SOURCE_DIR}/Builds/CMake/CMake_sqlite3.txt
+    <SOURCE_DIR>/CMakeLists.txt
+  CMAKE_ARGS
+    -DCMAKE_CXX_COMPILER=${CMAKE_CXX_COMPILER}
+    -DCMAKE_C_COMPILER=${CMAKE_C_COMPILER}
+    $<$<BOOL:${CMAKE_VERBOSE_MAKEFILE}>:-DCMAKE_VERBOSE_MAKEFILE=ON>
+    -DCMAKE_DEBUG_POSTFIX=_d
+    $<$<NOT:$<BOOL:${is_multiconfig}>>:-DCMAKE_BUILD_TYPE=${CMAKE_BUILD_TYPE}>
+    $<$<BOOL:${MSVC}>:
+      "-DCMAKE_C_FLAGS=-GR -Gd -fp:precise -FS -MP"
+      "-DCMAKE_C_FLAGS_DEBUG=-MTd"
+      "-DCMAKE_C_FLAGS_RELEASE=-MT"
+    >
+  LOG_BUILD ON
+  LOG_CONFIGURE ON
+  BUILD_COMMAND
+    ${CMAKE_COMMAND}
+    --build .
+    --config $<CONFIG>
+    $<$<VERSION_GREATER_EQUAL:${CMAKE_VERSION},3.12>:--parallel ${ep_procs}>
+    $<$<BOOL:${is_multiconfig}>:
+      COMMAND
+        ${CMAKE_COMMAND} -E copy
+          <BINARY_DIR>/$<CONFIG>/${ep_lib_prefix}sqlite3$<$<CONFIG:Debug>:_d>${ep_lib_suffix}
+          <BINARY_DIR>
+      >
+  TEST_COMMAND ""
+  INSTALL_COMMAND ""
+  BUILD_BYPRODUCTS
+    <BINARY_DIR>/${ep_lib_prefix}sqlite3${ep_lib_suffix}
+    <BINARY_DIR>/${ep_lib_prefix}sqlite3_d${ep_lib_suffix}
+)
+ExternalProject_Get_Property (sqlite3 BINARY_DIR)
+ExternalProject_Get_Property (sqlite3 SOURCE_DIR)
+if (CMAKE_VERBOSE_MAKEFILE)
+  print_ep_logs (sqlite3)
+endif ()
+add_library (sqlite STATIC IMPORTED GLOBAL)
+set_target_properties (sqlite PROPERTIES
+  IMPORTED_LOCATION_DEBUG
+    ${BINARY_DIR}/${ep_lib_prefix}sqlite3_d${ep_lib_suffix}
+  IMPORTED_LOCATION_RELEASE
+    ${BINARY_DIR}/${ep_lib_prefix}sqlite3${ep_lib_suffix}
+  INTERFACE_INCLUDE_DIRECTORIES
+    ${SOURCE_DIR})
+add_dependencies (sqlite sqlite3)
+target_link_libraries (sqlite INTERFACE $<$<NOT:$<BOOL:${MSVC}>>:dl>)
+target_link_libraries (ripple_libs INTERFACE sqlite)
+exclude_if_included (sqlite3)
+exclude_if_included (sqlite)
+set(sqlite_BINARY_DIR ${BINARY_DIR})