.POSIX:
DATE         = 1970-01-01
VERSION      = 0.1.0
NAME         = golite
NAME_UC      = $(NAME)
LANGUAGES    = en
## Installation prefix.  Defaults to "/usr".
PREFIX       = /usr
BINDIR       = $(PREFIX)/bin
LIBDIR       = $(PREFIX)/lib
GOLIBDIR     = $(LIBDIR)/go
INCLUDEDIR   = $(PREFIX)/include
SRCDIR       = $(PREFIX)/src/$(NAME)
SHAREDIR     = $(PREFIX)/share
LOCALEDIR    = $(SHAREDIR)/locale
MANDIR       = $(SHAREDIR)/man
EXEC         = ./
## Where to store the installation.  Empty by default.
DESTDIR      =
LDLIBS       = -lsqlite3
GOCFLAGS     = -I $(GOLIBDIR)
GOLDFLAGS    = -L $(GOLIBDIR)



.SUFFIXES:
.SUFFIXES: .go .a .c .o .so .bin .bin-check

.c.o:
	$(CC) $(CFLAGS) -o $@ -c $<



all:
include deps.mk


functional-tests.a   = $(functional-tests.go:.go=.a)
functional-tests.bin = $(functional-tests.go:.go=.bin)
fuzz-targets.a       = $(fuzz-targets.go:.go=.a)
fuzz-targets.bin     = $(fuzz-targets.go:.go=.bin)
benchmarks.a         = $(benchmarks.go:.go=.a)
benchmarks.bin       = $(benchmarks.go:.go=.bin)

cgo.go = \
	src/_cgo_import.go             \
	src/_cgo_gotypes.go            \
	src/$(NAME).cgo1.go            \

cgo.c = \
	src/_cgo_export.c              \
	src/$(NAME).cgo2.c             \

cgo.o = $(cgo.c:.c=.o)

sources = \
	src/$(NAME).go                 \
	src/version.go                 \


derived-assets = \
	src/version.go                 \
	src/_cgo_.o                    \
	$(cgo.go)                      \
	$(cgo.c)                       \
	$(cgo.o)                       \
	src/$(NAME).a                  \
	tests/$(NAME).a                \
	tests/main.a                   \
	tests/main.bin                 \
	$(functional-tests.a)          \
	$(functional-tests.bin)        \
	tests/functional/streq.so      \
	$(fuzz-targets.a)              \
	$(fuzz-targets.bin)            \
	$(benchmarks.a)                \
	$(benchmarks.bin)              \

side-assets = \
	src/_cgo_export.h              \
	src/_cgo_main.c                \
	tests/benchmarks/*.txt         \



## Default target.  Builds all artifacts required for testing
## and installation.
all: $(derived-assets)


$(derived-assets): Makefile deps.mk

$(cgo.go) $(cgo.c) $(cgo.o): src/_cgo_.o

$(functional-tests.a) $(fuzz-targets.a) $(benchmarks.a): src/$(NAME).a


src/_cgo_.o: src/$(NAME).go
	go tool cgo --objdir $(@D) src/$(NAME).go

src/_cgo_import.go: src/_cgo_.o
	go tool cgo --dynpackage $(NAME) --dynimport src/_cgo_.o --dynout $@

src/$(NAME).a:   $(cgo.go) $(cgo.o) src/version.go
	go tool compile $(GOCFLAGS) -o $@ -p $(*F) $(cgo.go) src/version.go
	go tool pack r $@ $(cgo.o)

tests/$(NAME).a: $(cgo.go) $(cgo.o) src/version.go tests/$(NAME).go
	go tool compile $(GOCFLAGS) -o $@ -p $(*F) $(cgo.go) src/version.go $*.go
	go tool pack r $@ $(cgo.o)

tests/main.a: tests/main.go tests/$(NAME).a
	go tool compile $(GOCFLAGS) -o $@ -p $(*F) -I $(@D) $*.go

tests/main.bin: tests/main.a
	go tool link   $(GOLDFLAGS) -o $@ -L $(@D) --extldflags '$(LDLIBS)' $*.a

src/version.go: Makefile
	echo 'package $(NAME); const Version = "$(VERSION)"' > $@

$(functional-tests.a) $(benchmarks.a):
	go tool compile              $(GOCFLAGS) -o $@ -p main  -I src   $*.go

$(fuzz-targets.a):
	go tool compile -d=libfuzzer $(GOCFLAGS) -o $@ -p main  -I src   $*.go

$(functional-tests.bin) $(fuzz-targets.bin) $(benchmarks.bin):
	go tool link   $(GOLDFLAGS) -o $@ -L src   --extldflags '$(LDLIBS)' $*.a

tests/functional/streq.so: tests/functional/streq.c
	$(CC) $(CFLAGS) $(LDFLAGS) -fPIC --shared -o $@ $*.c



tests/functional/extension.bin-check: tests/functional/streq.so
	LD_LIBRARY_PATH=$(@D) $(EXEC)$*.bin

functional-tests.bin-check = $(functional-tests-butone.go:.go=.bin-check)

tests.bin-check = \
	tests/main.bin-check           \
	$(functional-tests.bin-check)  \

tests/main.bin-check: tests/main.bin
$(tests.bin-check):
	$(EXEC)$*.bin

check-unit: $(tests.bin-check)
check-unit: tests/functional/extension.bin-check


integration-tests = \

.PRECIOUS: $(integration-tests)
$(integration-tests): $(NAME).bin
$(integration-tests): ALWAYS
	sh $@

check-integration: $(integration-tests)


## Run all tests.  Each test suite is isolated, so that a parallel
## build can run tests at the same time.  The required artifacts
## are created if missing.
check: check-unit check-integration



FUZZSEC=1
fuzz-targets.bin-check = $(fuzz-targets.go:.go=.bin-check)
$(fuzz-targets.bin-check):
	$(EXEC)$*.bin --test.fuzztime=$(FUZZSEC)s \
		--test.fuzz='.*' --test.fuzzcachedir=tests/fuzz/corpus

fuzz: $(fuzz-targets.bin-check)



benchmarks.bin-check = $(benchmarks.go:.go=.bin-check)
$(benchmarks.bin-check):
	rm -f $*.txt
	printf '%s\n' '$(EXEC)$*.bin'           >> $*.txt
	LANG=POSIX.UTF-8 time -p $(EXEC)$*.bin 2>> $*.txt
	printf '%s\n' '$*.txt'

bench: $(benchmarks.bin-check)



## Remove *all* derived artifacts produced during the build.
## A dedicated test asserts that this is always true.
clean:
	rm -rf $(derived-assets) $(side-assets)


## Installs into $(DESTDIR)$(PREFIX).  Its dependency target
## ensures that all installable artifacts are crafted beforehand.
install: all
	mkdir -p \
		'$(DESTDIR)$(GOLIBDIR)'   \
		'$(DESTDIR)$(SRCDIR)'     \

	cp src/$(NAME).a     '$(DESTDIR)$(GOLIBDIR)'
	cp $(sources)        '$(DESTDIR)$(SRCDIR)'

## Uninstalls from $(DESTDIR)$(PREFIX).  This is a perfect mirror
## of the "install" target, and removes *all* that was installed.
## A dedicated test asserts that this is always true.
uninstall:
	rm -rf \
		'$(DESTDIR)$(GOLIBDIR)'/$(NAME).a     \
		'$(DESTDIR)$(SRCDIR)'                 \


ALWAYS: