Makefile

CPP = sokol/sokol_app.h
CPP += sokol/sokol_gfx.h
CPP += sokol/sokol_time.h
CPP += sokol/sokol_glue.h
CPP += imgui/imgui_draw.cpp
CPP += imgui/imgui_tables.cpp
CPP += imgui/imgui_widgets.cpp
CPP += imgui/imgui_demo.cpp
CPP += imgui/imgui.cpp
CPP += sokol/util/sokol_imgui.h

VERSION=$(shell cd imgui; git describe --tags)
TGZ=imgui_app_$(VERSION).tgz
ZIP=imgui_app_$(VERSION).zip

all: $(TGZ) $(ZIP) 

$(TGZ): imgui.h imgui_app.cpp imgui_internal.h sokol.h README.md
	@echo "Creating $(TGZ)"
	@tar -cvzf $@ $^

$(ZIP): imgui.h imgui_app.cpp imgui_internal.h sokol.h README.md
	@echo "Creating $(TGZ)"
	@zip $@ $^

.PHONY: header.txt clean

header.txt: imgui sokol
	@echo "// ----------------------------------------------------------------------------" > $@
	@echo "// File generated by imgui-app. By Jose L. Hidalgo (PpluX) @ 2021" >> $@
	@echo "// ----------------------------------------------------------------------------" >> $@
	@(cd imgui; git log --pretty="// imgui:%n//    %H(%ad)" -1 >> ../header.txt )
	@(cd sokol; git log --pretty="// sokol:%n//    %H(%ad)" -1 >> ../header.txt )
	@echo "// ----------------------------------------------------------------------------" >> $@

imgui.h: src/imgui_app.h imgui/imgui.h header.txt
	@cat header.txt > $@
	@cat src/imgui_app.h >> $@
	@cat imgui/imgui.h >> $@
	@sed -e 's/\(#include "imconfig.h"\)/\/\/\1/' -i $@

imgui_app.cpp: header.txt $(CPP) src/imgui_app.cpp 
	@cat header.txt > $@
	@echo "#define SOKOL_IMPL\n#define SOKOL_NO_ENTRY\n\n" >> $@
	@echo "#define SOKOL_IMPL\n#define SOKOL_WIN32_FORCE_MAIN\n\n" >> $@
	@cat $(CPP) >> $@
# imgui_internal, only replace the first time, remove the other includes
	@sed -e '0,/#include "imgui_internal.h"/{ /#include "imgui_internal.h"/{' -e 'r imgui/imgui_internal.h' -e 'd' -e '}}' -i $@
	@sed -e 's/#include "imgui_internal.h"//' -i $@
# Other dependencies:
	@sed -e '/#include "imstb_textedit.h"/ {' -e 'r imgui/imstb_textedit.h' -e 'd' -e '}' -i $@
	@sed -e '/#include "imstb_rectpack.h"/ {' -e 'r imgui/imstb_rectpack.h' -e 'd' -e '}' -i $@
	@sed -e '/#include "imstb_truetype.h"/ {' -e 'r imgui/imstb_truetype.h' -e 'd' -e '}' -i $@
	@cat src/imgui_app.cpp >> $@

imgui_internal.h: header.txt imgui/imgui_internal.h
	@cat $+ > $@
	@sed -e '/#include "imstb_textedit.h"/ {' -e 'r imgui/imstb_textedit.h' -e 'd' -e '}' -i $@
	@sed -e '/#include "imstb_rectpack.h"/ {' -e 'r imgui/imstb_rectpack.h' -e 'd' -e '}' -i $@
	@sed -e '/#include "imstb_truetype.h"/ {' -e 'r imgui/imstb_truetype.h' -e 'd' -e '}' -i $@

sokol.h: header.txt sokol/sokol_app.h sokol/sokol_time.h
	@cat $+ > $@

clean:
	@rm -f imgui_app.cpp imgui.h imgui_app.tgz header.txt