#
# Project Home:
# ============
# https://llvm.org
#
# GitHub:
# ======
# https://github.com/llvm/llvm-project
#
# Clone:
# =====
# https://github.com/llvm/llvm-project.git
#

url        = https://github.com/llvm

repo_name  = llvm-project
pkg_name   = llvm

#
# List of tags to be extracted:
# ============================
#                                               hash | tag
#            ----------------------------------------+-----
revisions  = 1fdec59bffc11ae37eb51a1b9869f0696bfd5312:11.1.0
revisions += d28af7c654d8db0b68c175db5ce212d74fb5e9bc:12.0.0
revisions += fed41342a82f5a3a9201819a82bf7a48313e296b:12.0.1
revisions += d7b669b3a30345cfcdb2fde2af6f48aa4b94845d:13.0.0
revisions += 5c68a1cb123161b54b72ce90e7975d95a8eaf2a4:15.0.4
revisions += 8dfdcc7b7bf66834a761bd8de445840ef68e4d1a:15.0.7
revisions += cd89023f797900e4492da58b7bed36f702120011:16.0.1
revisions += 18ddebe1a1a9bde349441631365f0472e9693520:16.0.2
revisions += 6009708b4367171ccdbf4b5905cb6a803753fe18:17.0.6

git_repo   = .git_clone

suffix     = tar.xz

versions   = $(foreach tag, $(revisions), $(shell echo $(tag) | cut -f 2 -d ':'))

tarballs   = $(addsuffix .$(suffix), $(addprefix $(pkg_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 revision in $(revisions) ; do \
	  hash=`echo $$revision    | cut -f 1 -d ':'` ; \
	  version=`echo $$revision | cut -f 2 -d ':'` ; \
	  if [ ! -f $(repo_name)-$$version.$(suffix) ]; then \
	    echo -e "\n======= Creating '$(pkg_name)-$$version.$(suffix)' snapshot =======" ; \
	    ( cd $(repo_name) && \
	      git archive --format=tar --prefix=$(pkg_name)-$$version/ $$hash | \
	      xz >../$(pkg_name)-$$version.$(suffix) ) ; \
	  fi ; \
	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)