Makefile

### MichalOS Makefile

.DEFAULT_GOAL := retail

# These targets aren't triggered by a change of a file.
.PHONY: clean

# This selects all programs and music files to be built.
PROGRAMS := \
	$(patsubst programs/%.asm,build/%.app,$(sort $(wildcard programs/*.asm))) \
	$(patsubst programs/gitignore/%.asm,build/%.app,$(sort $(wildcard programs/gitignore/*.asm)))
MMF := $(patsubst files/src/%.mus,build/%.mmf,$(sort $(wildcard files/src/*.mus)))
DRO := $(patsubst files/src/%.dro,build/%.drz,$(sort $(wildcard files/src/*.dro)))

# This selects all compressed kernel assets to be built and compressed
CKA := $(patsubst kernel/compressed/%.asm,build/%.zx7,$(sort $(wildcard kernel/compressed/*.asm)))

# This selects all files to copy to the final image.
FILES := $(PROGRAMS) $(MMF) $(DRO) $(wildcard files/*.*) $(wildcard files/gitignore/*.*)

VER := 3.0
VERCOMMIT := 0

build:
	mkdir -p $@

build/images:
	mkdir -p $@

build/images/isoroot:
	mkdir -p $@

build/images/iso288root:
	mkdir -p $@

misc/zx7/app_zx7: misc/zx7/appzx7.c misc/zx7/optimize.c misc/zx7/compress.c
	cc $^ -o $@

misc/zx7/raw_zx7: misc/zx7/rawzx7.c misc/zx7/optimize.c misc/zx7/compress.c
	cc $^ -o $@

misc/zx7/segmented_zx7: misc/zx7/zx7.c misc/zx7/optimize.c misc/zx7/compress.c
	cc $^ -o $@

# Default target: builds the image and boots it.
retail: build/images/michalos.flp
	dosbox -conf misc/dosbox.conf -c "boot build/images/michalos.flp"

# Development target: builds as usual, but uses dosbox-debug instead of regular DOSBox.
debug: build/images/michalos.flp
	dosbox-debug -conf misc/dosbox.conf -c "boot build/images/michalos.flp"

# Noboot target: builds as usual, but does not boot the image.
noboot: build/images/michalos.flp

# "Big" floppy target: builds an 2.88 image (containing a 1.44 MB FAT filesystem and a 1.44 MB binary)
big: build/images/michalos288.flp
	dosbox -conf misc/dosbox.conf -c "boot build/images/michalos288.flp"

bigdebug: build/images/michalos288.flp
	dosbox-debug -conf misc/dosbox.conf -c "boot build/images/michalos288.flp"

bignoboot: build/images/michalos288.flp

# Include header file
include/syscalls.asm: misc/geninclude.py kernel/main.asm kernel/features/*.asm kernel/features/*/*.asm
	python3 misc/geninclude.py

# Bootloader target
build/boot.bin: boot/boot.asm .git/refs/heads/master | build
	nasm -O2 -w+all -f bin -o $@ -l build/boot.lst boot/boot.asm \
	-dVERMIN="'`expr $$(git rev-list --all --count) - $(VERCOMMIT)`'" \
	-dVERMAJ="'$(VER)'"

# Compressed kernel asset target
build/%.zx7: kernel/compressed/%.asm include/*.* .git/refs/heads/master misc/zx7/raw_zx7 | build
	nasm -I . $< -o $@.raw
	misc/zx7/raw_zx7 $@.raw $@

# Kernel target
build/kernel.sys: kernel/main.asm include/*.* .git/refs/heads/master $(CKA) | build
	nasm -O2 -w+all -f bin -I . -I kernel/ -I build/ -o $@ -l build/kernel.lst kernel/main.asm \
	-dVERMIN="'`expr $$(git rev-list --all --count) - $(VERCOMMIT)`'" \
	-dVERMAJ="'$(VER)'"

# Assembles all programs.
# Note: % means file name prefix, $@ means output file and $< means source file.
build/%.app: build/%.app.bin misc/zx7/app_zx7
	misc/zx7/app_zx7 $< $@

.PRECIOUS: build/%.app.bin

build/%.app.bin: programs/gitignore/%.asm programs/gitignore/%/*.asm include/*.* .git/refs/heads/master | build
	nasm -O2 -w+all -f bin -I . -I programs/ -I programs/gitignore/ -o $@ -l $@.lst $< \
	-dGIT="'(`git log -1 --format="commit %h from %cd" --date=format:"%Y/%m/%d %H:%M:%S %z"`)'"
	
build/%.app.bin: programs/gitignore/%.asm include/*.* .git/refs/heads/master | build
	nasm -O2 -w+all -f bin -I . -I programs/ -I programs/gitignore/ -o $@ -l $@.lst $< \
	-dGIT="'(`git log -1 --format="commit %h from %cd" --date=format:"%Y/%m/%d %H:%M:%S %z"`)'"
	
build/%.app.bin: programs/%.asm programs/%/*.asm include/*.* .git/refs/heads/master | build
	nasm -O2 -w+all -f bin -I . -I programs/ -o $@ -l $@.lst $< \
	-dGIT="'(`git log -1 --format="commit %h from %cd" --date=format:"%Y/%m/%d %H:%M:%S %z"`)'"
	
build/%.app.bin: programs/%.asm include/*.* .git/refs/heads/master | build
	nasm -O2 -w+all -f bin -I . -I programs/ -o $@ -l $@.lst $< \
	-dGIT="'(`git log -1 --format="commit %h from %cd" --date=format:"%Y/%m/%d %H:%M:%S %z"`)'"
	
# Assembles all songs.
build/%.mmf: files/src/%.mus include/constants.asm | build
	nasm -O2 -w+all -f bin -I . -I files/src/ -o $@ $<

build/%.drz: files/src/%.dro misc/zx7/segmented_zx7 | build
	misc/zx7/segmented_zx7 $< $@

# Builds the image.
build/images/michalos.flp: include/syscalls.asm build/boot.bin build/kernel.sys \
					$(FILES) | build/images
	dd if=/dev/zero of=build/images/michalos.flp bs=512 count=2880
	dd conv=notrunc if=build/boot.bin of=build/images/michalos.flp
	
	mcopy -o -i $@ build/kernel.sys $(FILES) ::

build/images/michalos288.flp: build/images/michalos.flp files/gitignore/288data
	cp files/gitignore/288data build/288data
	truncate -s 1474560 build/288data
	cat build/images/michalos.flp build/288data > $@

# Optional target: builds a bootable ISO image for CDs.
iso: build/images/michalos.iso

build/images/michalos.iso: build/images/michalos.flp | build/images/isoroot
	rm -f $@
	cp $< build/images/isoroot/michalos.flp
	mkisofs -V 'MICHALOS' -input-charset iso8859-1 -o $@ -b michalos.flp build/images/isoroot/

bigiso: build/images/michalos288.iso

build/images/michalos288.iso: build/images/michalos288.flp | build/images/iso288root
	rm -f $@
	cp $< build/images/iso288root/michalos.flp
	mkisofs -V 'MICHALOS' -input-charset iso8859-1 -o $@ -b michalos.flp build/images/iso288root/

# Removes all of the built pieces.
clean:
	-rm -rf build misc/zx7/*_zx7