From 54dfcc50fb6fffca6daaa0e0d70cb558e3efd3e5 Mon Sep 17 00:00:00 2001
From: Markus Mittendrein <maxmitti@maxmitti.tk>
Date: Sat, 8 Jan 2022 00:28:58 +0100
Subject: Add CMake target to generate a single header file

---
 CMakeLists.txt             | 14 ++++++++++++++
 GenerateSingleHeader.cmake | 18 ++++++++++++++++++
 2 files changed, 32 insertions(+)
 create mode 100644 GenerateSingleHeader.cmake

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 46720d7..89be727 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -17,5 +17,19 @@ add_library(cxxformat INTERFACE
 target_include_directories(cxxformat INTERFACE "${CMAKE_CURRENT_SOURCE_DIR}/include")
 target_compile_features(cxxformat INTERFACE cxx_std_20)
 
+add_custom_command(OUTPUT "${CMAKE_CURRENT_BINARY_DIR}/cxxformat.hpp"
+	COMMAND "${CMAKE_COMMAND}" "-DOUTPUT=${CMAKE_CURRENT_BINARY_DIR}/cxxformat.hpp" "-DSRC_DIR=${CMAKE_CURRENT_SOURCE_DIR}" -P "${CMAKE_CURRENT_SOURCE_DIR}/GenerateSingleHeader.cmake"
+	DEPENDS include/cxxformat/core.hpp
+		include/cxxformat/file_ptr.hpp
+		include/cxxformat/formatters.hpp
+		include/cxxformat/helpers.hpp
+		include/cxxformat/ostream.hpp
+		include/cxxformat/runtime.hpp
+		include/cxxformat/string.hpp
+		GenerateSingleHeader.cmake
+)
+
+add_custom_target(single-header DEPENDS "${CMAKE_CURRENT_BINARY_DIR}/cxxformat.hpp")
+
 add_executable(test EXCLUDE_FROM_ALL main.cpp)
 target_link_libraries(test PRIVATE cxxformat)
diff --git a/GenerateSingleHeader.cmake b/GenerateSingleHeader.cmake
new file mode 100644
index 0000000..e8fc5f7
--- /dev/null
+++ b/GenerateSingleHeader.cmake
@@ -0,0 +1,18 @@
+file(WRITE "${OUTPUT}" "#pragma once\n")
+
+function(add_header header output)
+	file(READ "${SRC_DIR}/include/cxxformat/${header}.hpp" content)
+
+	string(REPLACE "#pragma once\n" "" content "${content}")
+	string(REGEX REPLACE "#include <cxxformat/[^>]+>\n" "" content "${content}")
+
+	file(APPEND ${output} "${content}")
+endfunction()
+
+add_header(helpers ${OUTPUT})
+add_header(core ${OUTPUT})
+add_header(formatters ${OUTPUT})
+add_header(file_ptr ${OUTPUT})
+add_header(ostream ${OUTPUT})
+add_header(string ${OUTPUT})
+add_header(runtime ${OUTPUT})
-- 
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