# -*- makefile -*-
bin_SCRIPTS  += git-buildmsg/git-buildmsg
EXTRA_DIST   += git-buildmsg/git-buildmsg.in
UPLOAD_FILES += git-buildmsg/git-buildmsg

TESTS += git-buildmsg-test
check_PROGRAMS += git-buildmsg-test
nodist_git_buildmsg_test_SOURCES = git-buildmsg/git-buildmsg-test.c

dist_doc_DATA +=  git-buildmsg/README.git-buildmsg

BUILT_SOURCES += git-buildmsg/git-buildmsg-test.c
CLEANFILES    += git-buildmsg/git-buildmsg-test.c
git-buildmsg/git-buildmsg-test.c: git-buildmsg/git-buildmsg
	mkdir -p git-buildmsg
	sh git-buildmsg/git-buildmsg --example --srcdir "$(top_srcdir)" \
		--output git-buildmsg/git-buildmsg-test.c

BUILT_SOURCES += git-buildmsg.stamp
GIT_BUILDMSG_CMD = $(SHELL) "git-buildmsg/git-buildmsg" --error-if-no-git
GIT_BUILDMSG_H = git-buildmsg.h
CLEANFILES += $(GIT_BUILDMSG_H)
git-buildmsg.stamp: git-buildmsg/git-buildmsg
	@if env GIT_DIR="$(top_srcdir)/.git" $(GIT_BUILDMSG_CMD) -s "$(top_srcdir)" -o "$(GIT_BUILDMSG_H)"; then \
		if test -s "$(srcdir)/$(GIT_BUILDMSG_H)"; then \
			if diff "$(srcdir)/$(GIT_BUILDMSG_H)" "$(GIT_BUILDMSG_H)"; then \
				echo "New $(GIT_BUILDMSG_H) does not differ from $(srcdir)/$(GIT_BUILDMSG_H)"; \
				exit 0; \
			else \
				echo "Error: $(srcdir)/$(GIT_BUILDMSG_H) and $(GIT_BUILDMSG_H) differ."; \
				echo "       You probably want to remove the former."; \
				exit 1; \
			fi; \
		fi; \
	else \
		if test -s "$(srcdir)/$(GIT_BUILDMSG_H)"; then \
			echo "Not a git worktree."; \
			echo "Keep using the $(GIT_BUILDMSG_H) from $(top_srcdir)"; \
			rm -f "$(GIT_BUILDMSG_H)"; \
			exit 0; \
		else \
			echo "Warning: $(GIT_BUILDMSG_H) without git workdir."; \
			exit 0; \
		fi; \
	fi

TESTS += print-buildmsg
bin_PROGRAMS += print-buildmsg
check_PROGRAMS += print-buildmsg
print_buildmsg_SOURCES = git-buildmsg/print-buildmsg.c
nodist_print_buildmsg_SOURCES = $(GIT_BUILDMSG_H)

dist-hook: dist-hook-git-buildmsg
dist-hook-git-buildmsg: git-buildmsg.stamp
	if test -e "$(GIT_BUILDMSG_H)"; then \
		$(SED) -e 's|^#undef GIT_IS_DIST.*|#define GIT_IS_DIST 1|' \
			"$(GIT_BUILDMSG_H)" > "$(distdir)/$(GIT_BUILDMSG_H)"; \
	fi