# Makefile - Main build script for sbc-harness project
#
# Copyright (C) 2024  Luke T. Shumaker <lukeshu@lukeshu.com>
# SPDX-Licence-Identifier: AGPL-3.0-or-later

linux.git = $(HOME)/src/github.com/torvalds/linux

all: build
.PHONY: all

.NOTINTERMEDIATE:
.DELETE_ON_ERROR:

################################################################################

generate/files =

generate/files += 3rd-party/linux-errno.txt
3rd-party/linux-errno.txt: %: %.gen
	./$< $(linux.git)

generate/files += lib9p/include/lib9p/linux-errno.h
lib9p/include/lib9p/linux-errno.h: %: %.gen 3rd-party/linux-errno.txt
	./$^ >$@

generate/files += lib9p/9p.generated.c lib9p/include/lib9p/9p.generated.h
lib9p/9p.generated.c lib9p/include/lib9p/9p.generated.h &: lib9p/idl.gen lib9p/idl/*.9p
	./$^

generate/files += libusb/include/libusb/tusb_helpers.h 3rd-party/MS-LCID.pdf 3rd-party/MS-LCID.txt
libusb/include/libusb/tusb_helpers.h 3rd-party/MS-LCID.pdf 3rd-party/MS-LCID.txt &: libusb/include/libusb/tusb_helpers.h.gen
	./$^

################################################################################

commands := $(patsubst cmd/%/CMakeLists.txt,%,$(wildcard cmd/*/CMakeLists.txt))
build: $(foreach c,$(commands),cmd/$c/build)
.PHONY: build

cmd/%/build: build/%/Makefile $(generate/files)
	$(MAKE) -C $(<D)
.PHONY: cmd/%/build
build/%/Makefile: cmd/%/CMakeLists.txt
	mkdir -p $(@D) && cd $(@D) && cmake -DCMAKE_BUILD_TYPE=Debug -D_UBUILD_CMD=$* $(shell if grep -q pico_sdk_init $<; then echo ' -D_UBUILD_USE_PICO_SDK=1 '; fi) ../..

generate: $(generate/files)
.PHONY: generate

generate-clean:
	rm -f -- $(generate/files)
.PHONY: generate-clean

################################################################################

.PHONY: FORCE

# List of sources, by type.
.sources.mk: $(if $(wildcard .git),FORCE)
	git ls-files | grep -vFx $(foreach f,$(generate/files),-e $f) \
	| sed 's,^,$(CURDIR)/,' | xargs editorconfig                  \
	| sed -nE -e 's,\[$(CURDIR)/(.*)\],\1,p' -e 's/^_mode=//p'    \
	| sed -E '{N;s/(.*)\n(.*)/sources_\2 += \1/;}'                \
	| sort                                                        \
	>$@.tmp
	if ! cmp -s $@.tmp $@; then mv $@.tmp $@; fi
-include .sources.mk
sources_all := $(foreach v,$(filter sources_%,$(.VARIABLES)),$($v))

# lint #############
lint:
	$(MAKE) -k $(patsubst sources_%,lint/%,$(filter sources_%,$(.VARIABLES)))
lint/sh lint/bash: lint/%:
	shellcheck $(sources_$*)
lint/python3: lint/%:
	mypy --strict --scripts-are-modules $(sources_$*)
	black --check $(sources_$*)
	isort --check $(sources_$*)
lint/c: lint/%:
	@: TODO
lint/make lint/cmake lint/gitignore lint/ini lint/9p lint/markdown: lint/%:
	@:
lint/unknown: lint/%:
	@printf "%s: cannot lint unknown file type\n" $(sources_$*) >&2
lint/all: lint/%:
	$(eval export sources_$*)
	@find $$(printf '%s\n' $${sources_$*} | grep -vE '^cmd/[^/]+/static/') \
	    -maxdepth 0 -type f | \
	{ r=0; while read -r filename; do \
	    if ! grep -q 'Copyright (C) 2024  Luke T. Shumaker' $$filename; then \
	        echo "$$filename is missing a copyright statement"; r=1; continue; \
	    fi; \
	    dscname=$$(sed -n '1,3{ /^#!/d; /^<!--$$/d; /-\*- .* -\*-/d; s,[/*# ]*,,; s/ - .*//;p; q; }' $$filename); \
	    filename_alt1=$$(echo "$$filename" | sed \
	        -e 's,^cmd/,,' \
	        -e 's,.*/include/,,' \
	        -e 's,^lib9p/idl/,,' \
	        -e 's/\.wip$$//'); \
	    filename_alt2=$$(echo "$$filename_alt1" | sed \
	        -e 's,^sbc_harness/hw/,hw/,'); \
	    if ! { [ "$$dscname" == "$$filename" ] || [ "$$dscname" == "$$filename_alt1" ] || [ "$$dscname" == "$$filename_alt2" ]; }; then \
	        echo "$$filename self-identifies as $$dscname"; r=1; continue; \
	    fi; \
	done; exit $$r; }
.PHONY: lint lint/%

# format ###########
format:
	$(MAKE) -k $(patsubst sources_%,format/%,$(filter-out sources_all,$(filter sources_%,$(.VARIABLES))))
format/python3: format/%:
	black $(sources_$*)
	isort $(sources_$*)
format/sh format/bash: format/%
	@:
format/c: format/%:
	@: TODO
format/make format/cmake format/gitignore format/ini format/9p format/markdown: format/%:
	@:
format/unknown: format/%:
	@:
.PHONY: format format/%