all::

# Define V=1 to have a more verbose compile.
#

GIT-VERSION-FILE: .FORCE-GIT-VERSION-FILE
	@$(SHELL_PATH) ./GIT-VERSION-GEN
-include GIT-VERSION-FILE

SCRIPT_SH = git-gui.sh
GITGUI_BUILT_INS = git-citool
ALL_PROGRAMS = $(GITGUI_BUILT_INS) $(patsubst %.sh,%,$(SCRIPT_SH))

ifndef SHELL_PATH
	SHELL_PATH = /bin/sh
endif

ifndef gitexecdir
	gitexecdir := $(shell git --exec-path)
endif

ifndef INSTALL
	INSTALL = install
endif

ifndef V
	QUIET_GEN      = @echo '   ' GEN $@;
	QUIET_BUILT_IN = @echo '   ' BUILTIN $@;
endif

TCLTK_PATH ?= wish

ifeq ($(findstring $(MAKEFLAGS),s),s)
QUIET_GEN =
QUIET_BUILT_IN =
endif

DESTDIR_SQ = $(subst ','\'',$(DESTDIR))
gitexecdir_SQ = $(subst ','\'',$(gitexecdir))
SHELL_PATH_SQ = $(subst ','\'',$(SHELL_PATH))

$(patsubst %.sh,%,$(SCRIPT_SH)) : % : %.sh
	$(QUIET_GEN)rm -f $@ $@+ && \
	sed -e '1s|#!.*/sh|#!$(SHELL_PATH_SQ)|' \
		-e 's/@@GITGUI_VERSION@@/$(GITGUI_VERSION)/g' \
		$@.sh >$@+ && \
	chmod +x $@+ && \
	mv $@+ $@

$(GITGUI_BUILT_INS): git-gui
	$(QUIET_BUILT_IN)rm -f $@ && ln git-gui $@

# These can record GITGUI_VERSION
$(patsubst %.sh,%,$(SCRIPT_SH)): GIT-VERSION-FILE

all:: $(ALL_PROGRAMS)

install: all
	$(INSTALL) -d -m755 '$(DESTDIR_SQ)$(gitexecdir_SQ)'
	sed -i .bak -e'1,3s|^exec .* "$$0"|exec '"$(TCLTK_PATH)"' "$$0"|' git-gui && rm git-gui.bak
	$(INSTALL) git-gui '$(DESTDIR_SQ)$(gitexecdir_SQ)'
	$(foreach p,$(GITGUI_BUILT_INS), rm -f '$(DESTDIR_SQ)$(gitexecdir_SQ)/$p' && ln '$(DESTDIR_SQ)$(gitexecdir_SQ)/git-gui' '$(DESTDIR_SQ)$(gitexecdir_SQ)/$p' ;)

dist-version:
	@mkdir -p $(TARDIR)
	@echo $(GITGUI_VERSION) > $(TARDIR)/version

clean::
	rm -f $(ALL_PROGRAMS) GIT-VERSION-FILE

.PHONY: all install dist-version clean
.PHONY: .FORCE-GIT-VERSION-FILE