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REPO_URL  := https://club1.fr/~nicolas/git/dna-backup/

REPO_PATH := repo
GIT_PATH  := git
GITC      := git -C $(REPO_PATH)

BIN_PATH  := ..

.PHONY: apply
apply: commits ../dna-backup
	cat $< | while read i; do \
		$(GITC) checkout `echo "$$i" | cut -f1`; \
	done

$(BIN_PATH)/dna-backup: .FORCE
	$(MAKE) -C $(BIN_PATH) dna-backup

commits: Makefile repo git
	$(GITC) log --reverse --no-merges --pretty=tformat:"%H	%as" \
	| sort --unique --key=2 \
	> $@

repo git:
	git clone --separate-git-dir=$(GIT_PATH) $(REPO_URL) $(REPO_PATH)
# remove warning about detached head state
	$(GITC) config advice.detachedHead false

.PHONY: clean
clean:
	rm -rf $(REPO_PATH) $(GIT_PATH)
	rm -f commits

.FORCE: ;