SHELL := /bin/bash

ifndef SHELLFLAGS
	SHELLFLAGS :=
endif

.SHELLFLAGS := -eu -o pipefail ${SHELLFLAGS} -c
MAKEFLAGS += --warn-undefined-variables
MAKEFLAGS += --no-builtin-rules

FIND := $(if $(wildcard /bin/find),/bin/find,/usr/bin/find)

ifndef OS
	OS := unknown
endif

ifeq (${OS},Windows_NT)
	ifndef PYTHON_FILE
		PYTHON_FILE := $(shell which python)
		USE_CYGPATH_COMMAND := case "$$(uname -s)" in CYGWIN*|MINGW*|MSYS*) printf "yes";; esac;
		USE_CYGPATH := $(shell ${USE_CYGPATH_COMMAND})

		ifneq (,${USE_CYGPATH})
			PYTHON_FILE := $(shell cygpath -w "${PYTHON_FILE}")
		endif
	endif
else
	ifndef PYTHON_FILE
		PYTHON_FILE := $(shell which python3)
	endif
endif

.DELETE_ON_ERROR:
$(shell mkdir -p .build ../dist)

OUTDIR := ../dist
BUILDFLAGS := --release --strip
DEVFLAGS :=
RSPY_TARGET_DIR ?= target

QT_FTL_TEMPLATES := ../qt/ftl
QT_FTL_LOCALES := ../qt/ftl/repo/desktop

.PHONY: all develop build check fix clean

all: develop

develop: .build/develop

DEPS := .build/tools .build/vernum ../meta/buildhash \
	$(wildcard $(QT_FTL_TEMPLATES)/*.ftl) \
	$(wildcard $(QT_FTL_LOCALES)/*/*.ftl) \
	$(shell ${FIND} ../rslib/src -name '*.rs') $(wildcard ../proto/*) \
	$(shell ${FIND} ../rslib/ftl -type f) \
	$(shell ${FIND} ./src -type f)

.build/develop: $(DEPS)
	touch ../proto/backend.proto
	FTL_TEMPLATE_DIRS="$(QT_FTL_TEMPLATES)" FTL_LOCALE_DIRS="$(QT_FTL_LOCALES)" \
		CARGO_TARGET_DIR="$(RSPY_TARGET_DIR)" maturin develop $(DEVFLAGS)
	touch $@

build: .build/build

.build/build: $(DEPS)
	touch ../proto/backend.proto
	FTL_TEMPLATE_DIRS="$(QT_FTL_TEMPLATES)" FTL_LOCALE_DIRS="$(QT_FTL_LOCALES)" \
		maturin build -i "${PYTHON_FILE}" -o "$(OUTDIR)" $(BUILDFLAGS)
	touch $@

check: .build/check

fix:
	cargo fmt

clean:
	rm -rf .build target

# nightly currently required for ignoring files in rustfmt.toml
RUST_TOOLCHAIN := $(shell cat rust-toolchain)

.build/tools: requirements.txt rust-toolchain
	python -m pip install -r requirements.txt
	rustup toolchain install $(RUST_TOOLCHAIN)
	rustup component add rustfmt-preview --toolchain $(RUST_TOOLCHAIN)
	rustup component add clippy-preview --toolchain $(RUST_TOOLCHAIN)
	@touch $@

.build/check: build
	cargo fmt -- --check
	cargo clippy -- -D warnings
	@touch $@

VER := $(shell cat ../meta/version)
.build/vernum: ../meta/version
	sed -i.bak 's/.*automatically updated.*/version = "$(VER)"  # automatically updated/' Cargo.toml
	rm Cargo.toml.bak
	@touch $@