.POSIX:

NAME       := comitium

# will automatically set main.Version with this string
VERSION    ?= 1.5.2

# source dirs & files #
GOSRC      := $(shell find . -type f -name '*.go')
GOSRC      += go.mod go.sum
SCDDIR     := doc

BUILDDIR   ?= build

# install dirs #
PREFIX     ?= /usr/local
BINDIR     ?= $(PREFIX)/bin
MANDIR     ?= $(PREFIX)/share/man

# program paths and flags #
#GO         ?= go
# purely statically link (useful for cross compiling)
GO         ?= CGO_ENABLED=0 go
GOFLAGS    ?=
#GOLDFLAGS  ?= -X main.Version=$(VERSION) -X main.Commit=$(COMMIT)
# also strips executable, significantly reduces size
GOLDFLAGS  ?= -s -w -X main.Version=$(VERSION) -X main.Commit=$(COMMIT)
SCDOC      ?= scdoc
MKDIR      ?= mkdir -p
RM         ?= rm -f
RMDIR      ?= rmdir --ignore-fail-on-non-empty
GITC        = $(shell git rev-parse --short HEAD)
GITDIRTY    = $(shell git diff --quiet || echo "-dirty")

# build with `make COMMIT=tarball` if building outside of git repo
COMMIT     ?= $(GITC)$(GITDIRTY)

.PHONY: all clean install uninstall test
.DEFAULT_GOAL := all

all: $(BUILDDIR)/$(NAME) $(BUILDDIR)/$(NAME).1


$(BUILDDIR):
	@$(MKDIR) $(BUILDDIR)


$(BUILDDIR)/$(NAME): $(GOSRC) | $(BUILDDIR)
	$(GO) build $(GOFLAGS) -ldflags "$(GOLDFLAGS)" -o $@


$(BUILDDIR)/%.1: doc/%.1.scd | $(BUILDDIR)
	$(SCDOC) < $< > $@


clean:
	-$(RM) -r $(BUILDDIR)


install: all
	@$(MKDIR) -m755 $(DESTDIR)$(MANDIR)/man1 $(DESTDIR)$(BINDIR)
	install -m755 $(BUILDDIR)/$(NAME) $(DESTDIR)$(BINDIR)/$(NAME)
	install -m644 $(BUILDDIR)/$(NAME).1 $(DESTDIR)$(MANDIR)/man1/$(NAME).1

uninstall:
	$(RM) $(DESTDIR)$(BINDIR)/$(NAME)
	$(RM) $(DESTDIR)$(MANDIR)/man1/$(NAME).1
	-@$(RMDIR) $(DESTDIR)$(BINDIR)
	-@$(RMDIR) $(DESTDIR)$(MANDIR)/man1


test:
	$(GO) test ./...