# Copyright (c) 2023–2024 Emma Tebibyte <emma@tebibyte.media>
# Copyright (c) 2023–2024 DTB <trinity@trinity.moe>
# Copyright (c) 2023 Sasha Koshka <sashakoshka@tebibyte.media>
# SPDX-License-Identifier: FSFAP
#
# Copying and distribution of this file, with or without modification, are
# permitted in any medium without royalty provided the copyright notice and this
# notice are preserved.  This file is offered as-is, without any warranty.

.POSIX:
.PRAGMA: posix_202x # future POSIX standard support à la pdpmake(1)
.PRAGMA: command_comment # breaks without this?

PREFIX=/usr/local

CC=cc
RUSTC=rustc

.PHONY: all
all: dj false fop intcmp rpn scrut str strcmp swab true

build:
	# keep build/include until bindgen(1) has stdin support
	# https://github.com/rust-lang/rust-bindgen/issues/2703
	mkdir -p build/bin build/include build/lib build/o build/test

.PHONY: clean
clean:
	rm -rf build/ dist/

dist: all
	mkdir -p dist/bin dist/share/man/man1
	cp build/bin/* dist/bin/
	cp docs/*.1 dist/share/man/man1/

.PHONY: install
install: dist
	mkdir -p $(PREFIX)
	cp -r dist/* $(PREFIX)/

.PHONY: test
test: build
	tests/posix-compat.sh
	$(RUSTC) --test src/getopt-rs/lib.rs -o build/test/getopt

build/o/libsysexits.rlib: build
	# bandage solution until bindgen(1) gets stdin support
	printf '#define EXIT_FAILURE 1\n' | cat - include/sysexits.h \
		> build/include/sysexits.h 
	bindgen --default-macro-constant-type signed --use-core --formatter=none \
		"$$(printf '#include <sysexits.h>\n' \
			| cpp -M -idirafter "build/include" - \
			| sed 's/ /\n/g' | grep sysexits.h)" \
		| $(RUSTC) $(RUSTFLAGS) --crate-type lib -o build/o/libsysexits.rlib -

build/o/libgetopt.rlib: src/getopt-rs/lib.rs
	$(RUSTC) $(RUSTFLAGS) --crate-type=lib --crate-name=getopt \
		-o build/o/libgetopt.rlib src/getopt-rs/lib.rs

.PHONY: dj
dj: build/bin/dj
build/bin/dj: src/dj.c build
	$(CC) $(CFLAGS) -o $@ src/dj.c

.PHONY: false
false: build/bin/false
build/bin/false: src/false.c build
	$(CC) $(CFLAGS) -o $@ src/false.c

.PHONY: fop
fop: build/bin/fop
build/bin/fop: src/fop.rs build build/o/libgetopt.rlib build/o/libsysexits.rlib
	$(RUSTC) $(RUSTFLAGS) --extern getopt=build/o/libgetopt.rlib \
		--extern sysexits=build/o/libsysexits.rlib \
		-o $@ src/fop.rs

.PHONY: intcmp
intcmp: build/bin/intcmp
build/bin/intcmp: src/intcmp.c build
	$(CC) $(CFLAGS) -o $@ src/intcmp.c

.PHONY: rpn
rpn: build/bin/rpn
build/bin/rpn: src/rpn.rs build build/o/libsysexits.rlib
	$(RUSTC) $(RUSTFLAGS) \
		--extern sysexits=build/o/libsysexits.rlib \
		-o $@ src/rpn.rs

.PHONY: scrut
scrut: build/bin/scrut
build/bin/scrut: src/scrut.c build
	$(CC) $(CFLAGS) -o $@ src/scrut.c

.PHONY: str
str: build/bin/str
build/bin/str: src/str.c build
	$(CC) $(CFLAGS) -o $@ src/str.c

.PHONY: strcmp
strcmp: build/bin/strcmp
build/bin/strcmp: src/strcmp.c build
	$(CC) $(CFLAGS) -o $@ src/strcmp.c

.PHONY: swab
swab: build/bin/swab
build/bin/swab: src/swab.rs build build/o/libsysexits.rlib
	$(RUSTC) $(RUSTFLAGS) --extern getopt=build/o/libgetopt.rlib \
		--extern sysexits=build/o/libsysexits.rlib \
		-o $@ src/swab.rs

.PHONY: true
true: build/bin/true
build/bin/true: src/true.c build
	$(CC) $(CFLAGS) -o $@ src/true.c