Initial build script based on official Debian package

build_cythonplus

+#!/usr/bin/make -f
+REPOS = https://lab.nexedi.com/nexedi/cython.git
+TAG = cythonplus-0.2
+NAME = Xavier Thompson
+EMAIL = xavier.thompson@nexedi.com
+
+define SED_CTRL
+	s/^(Maintainer:).*/\1 $(NAME) <$(EMAIL)>/
+	/^Uploaders:/d
+	s,^(Homepage:).*,\1 https://cython.plus/,
+	s,^(Vcs-Git:).*,\1 $(REPOS),
+	/^Vcs-Browser:/d
+endef
+export SED_CTRL NAME EMAIL
+
+DPKG_INFO = /var/lib/dpkg/info
+BUILD_ESSENTIAL = $(DPKG_INFO)/build-essential.list
+DEVSCRIPTS = $(DPKG_INFO)/devscripts.list
+
+ifeq ($(shell id -u),0)
+SUDO =
+else
+SUDO = sudo
+endif
+
+all: cython/debian $(BUILD_ESSENTIAL)
+	cd cython && \
+	$(SUDO) apt-get build-dep . && \
+	DEB_BUILD_OPTIONS=nocheck dpkg-buildpackage -us -uc -b
+
+$(DPKG_INFO)/%.list:
+	$(SUDO) apt-get install $(*F) --no-install-recommends
+
+cython:
+	git clone -b $(TAG) $(REPOS)
+
+cython/debian: cython $(DEVSCRIPTS)
+	[ ! -e debian ] || rm -r debian
+	wget -qO - https://salsa.debian.org/python-team/packages/cython/-/archive/debian/master/cython-debian-master.tar.gz?path=debian | tar -xz --strip-components=1
+	sed -ri "$$SED_CTRL" debian/control
+	dch --force-distribution -D nexedi -v `cd $< && git describe |sed s/-/+cp-/`-deb`cat /etc/debian_version` "New Cython+ release: $(TAG)"
+	mv debian $<
+
+.PHONY: all