Extract the playground in its own HTML file (#24)

CMakeLists.txt

@@ -6,9 +6,24 @@ set(EXTENSION_NAME ${TARGET_NAME}_extension)
 set(LOADABLE_EXTENSION_NAME ${TARGET_NAME}_loadable_extension)
 
 project(${TARGET_NAME})
-include_directories(src/include duckdb/third_party/httplib duckdb/parquet/include)
-
-set(EXTENSION_SOURCES src/httpserver_extension.cpp)
+include_directories(
+  src/include
+  ${CMAKE_CURRENT_BINARY_DIR}
+  duckdb/third_party/httplib
+  duckdb/parquet/include
+)
+
+# Embed ./src/assets/index.html as a C++ header
+add_custom_command(
+  OUTPUT ${CMAKE_CURRENT_BINARY_DIR}/playground.hpp
+  COMMAND ${CMAKE_COMMAND} -P ${PROJECT_SOURCE_DIR}/embed.cmake ${PROJECT_SOURCE_DIR}/src/assets/index.html ${CMAKE_CURRENT_BINARY_DIR}/playground.hpp playgroundContent
+  DEPENDS ${PROJECT_SOURCE_DIR}/src/assets/index.html
+)
+
+set(EXTENSION_SOURCES
+    src/httpserver_extension.cpp
+    ${CMAKE_CURRENT_BINARY_DIR}/playground.hpp
+)
 
 if(MINGW)
   set(OPENSSL_USE_STATIC_LIBS TRUE)

embed.cmake

@@ -0,0 +1,18 @@
+set(resource_file_name ${CMAKE_ARGV3})
+set(output_file_name ${CMAKE_ARGV4})
+set(variable_name ${CMAKE_ARGV5})
+
+file(READ "${resource_file_name}" hex_content HEX)
+
+string(REPEAT "[0-9a-f]" 32 pattern)
+string(REGEX REPLACE "(${pattern})" "\\1\n" content "${hex_content}")
+
+string(REGEX REPLACE "([0-9a-f][0-9a-f])" "0x\\1, " content "${content}")
+
+string(REGEX REPLACE ", $" "" content "${content}")
+
+set(array_definition "static const unsigned char ${variable_name}[] =\n{\n${content}\n};")
+
+set(output "// Auto generated file.\n${array_definition}\n")
+
+file(WRITE "${output_file_name}" "${output}")