ifneq ($(PKG_SOURCE_PROTO),git)
$(error Only supported protocol is git)
endif
ifndef PKG_NAME
$(error You have to define PKG_NAME before pkgauto.mk include)
endif
ifndef PKG_SOURCE_URL
$(error You have to define PKG_SOURCE_URL before pkgauto.mk include)
endif
ifndef PKG_SOURCE_BRANCH
$(error You have to define PKG_SOURCE_BRANCH before pkgauto.mk include)
endif

TMP_REPO_PATH=/tmp/myrepo_$(PKG_NAME)

GIT_ARGS=--git-dir='$(TMP_REPO_PATH)' --bare

$(shell \
	if [ ! -d "$(TMP_REPO_PATH)" ]; then \
		git clone --bare "$(PKG_SOURCE_URL)" "$(TMP_REPO_PATH)"; \
	else \
		git $(GIT_ARGS) fetch "$(PKG_SOURCE_URL)"; \
	fi \
)

PKG_SOURCE_VERSION:=$(shell git $(GIT_ARGS) rev-parse $(PKG_SOURCE_BRANCH))
PKG_VERSION:=$(shell git $(GIT_ARGS) describe --abbrev=0 --tags $(PKG_SOURCE_BRANCH) | sed 's/^v//')
PKG_RELEASE:=$(shell git $(GIT_ARGS) rev-list --count v$(PKG_VERSION)..$(PKG_SOURCE_VERSION))

PKG_SOURCE:=$(PKG_NAME)-$(PKG_SOURCE_VERSION).tar.gz
PKG_SOURCE_SUBDIR:=$(PKG_NAME)
PKG_BUILD_DIR:=$(BUILD_DIR)/$(PKG_NAME)
HOST_BUILD_DIR:=$(BUILD_DIR_HOST)/$(PKG_NAME)

# TODO drop TMP_REPO_PATH $GIT_ARGS