UPSTREAM=https://github.com/ggerganov/llama.cpp.git
WORKDIR=llama/vendor
FETCH_HEAD=46e3556e01b824e52395fb050b29804b6cff2a7c

.PHONY: help
help:
	@echo "Available targets:"
	@echo "    sync                 Sync with upstream repositories"
	@echo "    checkout             Checkout upstream repository"
	@echo "    apply-patches        Apply patches to local repository"
	@echo "    format-patches       Format patches from local repository"
	@echo "    clean                Clean local repository"
	@echo
	@echo "Example:"
	@echo "    make -f $(lastword $(MAKEFILE_LIST)) clean sync"

.PHONY: sync
sync: llama/build-info.cpp llama/llama.cpp ml/backend/ggml/ggml apply-patches

.PHONY: llama/build-info.cpp
llama/build-info.cpp: llama/build-info.cpp.in
	sed -e 's|@FETCH_HEAD@|$(FETCH_HEAD)|' $< > $@

.PHONY: llama/llama.cpp
llama/llama.cpp: llama/vendor/ apply-patches
	rsync -arvzc -f "merge $@/.rsync-filter" $< $@

.PHONY: ml/backend/ggml/ggml apply-patches
ml/backend/ggml/ggml: llama/vendor/ggml/ apply-patches
	rsync -arvzc -f "merge $@/.rsync-filter" $< $@

PATCHES=$(wildcard llama/patches/*.patch)

.PHONY: apply-patches
.NOTPARALLEL:
apply-patches: $(addsuffix ed, $(PATCHES))

%.patched: %.patch
	@if git -c user.name=nobody -c 'user.email=<>' -C $(WORKDIR) am -3 $(realpath $<); then touch $@; else git -C $(WORKDIR) am --abort; exit 1; fi

.PHONY: checkout
checkout: $(WORKDIR)
	git -C $(WORKDIR) fetch
	git -C $(WORKDIR) checkout -f $(FETCH_HEAD)

$(WORKDIR):
	git clone $(UPSTREAM) $(WORKDIR)

.PHONE: format-patches
format-patches: llama/patches
	git -C $(WORKDIR) format-patch \
		--no-signature \
		--no-numbered \
		--zero-commit \
		-o $(realpath $<) \
		$(FETCH_HEAD)

.PHONE: clean
clean: checkout
	$(RM) $(addsuffix ed, $(PATCHES))