#
# Project Home:
# ============
#  https://libav.org
#
# Git:
#  git://git.libav.org/libav.git
#  https://github.com/libav/libav.git
#
# Clone:
# =====
#  git clone git://git.libav.org/libav.git
#  git clone https://github.com/libav/libav.git
#

url        = https://github.com/libav

repo_name  = libav

versions   = 9.10 9.11 9.16 10.3 10.7 11.2 11.4 12.3

suffix     = tar.xz
#
# List of tags to be extracted:
#
TAGS       = $(addprefix v, $(versions))

git_repo   = .git_clone
tarballs   = $(addsuffix .$(suffix), $(addprefix $(repo_name)-, $(versions)))
sha1s      = $(addsuffix .sha1sum, $(tarballs))

TARGETS = repository_clean


all: $(TARGETS)

.PHONY: downloads_clean repository_clean

$(git_repo):
	@echo -e "\n======= Clone $(repo_name).git repository =======\n"
	@rm -rf $(repo_name)
	@git clone $(url)/$(repo_name).git $(repo_name)
	@touch $@

$(tarballs): $(git_repo)
	@for version in $(versions) ; do \
	  tag=v`echo $$version` ; \
	  if [ ! -f $(repo_name)-$$version.$(suffix) ]; then \
	    echo -e "\n======= Creating '$(repo_name)-$$version.$(suffix)' snapshot =======" ; \
	    ( cd $(repo_name) && \
	      git archive --format=tar --prefix=$(repo_name)-$$version/ $$tag | \
	      xz >../$(repo_name)-$$version.$(suffix) ) ; \
	  fi ; \
	  tar xJf $(repo_name)-$$version.$(suffix) ; \
	  ( cd $(repo_name)-$$version ; rm -rf autom4te.cache .git* .travis.yml ) ; \
	  tar cJf $(repo_name)-$$version.$(suffix) $(repo_name)-$$version ; \
	  rm -rf $(repo_name)-$$version ; \
	done

$(sha1s): %.$(suffix).sha1sum : %.$(suffix)
	@for tarball in $< ; do \
	  echo -e "\n======= Calculation the '$$tarball' sha1sum =======" ; \
	  sha1sum --binary $$tarball > $$tarball.sha1sum ; \
	done

repository_clean: $(sha1s)
	@echo -e "\n======= Remove cloned $(repo_name).git repository =======\n"
	@rm -rf $(git_repo) $(repo_name)

downloads_clean:
	@rm -rf $(tarballs) $(sha1s)
	@rm -rf $(git_repo) $(repo_name)