copr: Add Copr build files

This is a Makefile to implement the "make srpm" method of Copr
integration.  It adjusts the Release field of the spec file so each
time there's a new build, it will show up as an upgrade option if you
have the repo enabled.

.copr/Makefile

@@ -0,0 +1,64 @@
+# Copyright David Cantrell <[email protected]>
+# SPDX-License-Identifier: GPL-3.0-or-later
+
+# Set the top level source directory
+topdir := $(shell realpath $(dir $(lastword $(MAKEFILE_LIST)))/..)
+
+# Install packages before anything else
+_install := $(shell dnf install -y git)
+_safedir := $(shell git config --global --add safe.directory $(topdir))
+
+# Pass BUILDTYPE=release to generate a release SRPM
+BUILDTYPE ?= copr
+
+# Spec file and template
+SPEC_TEMPLATE = $(shell ls -1 $(topdir)/*.spec)
+SPEC = $(topdir)/$(shell basename $(SPEC_TEMPLATE))
+
+# Replace placeholders in the spec file template
+RPMDATE = $(shell date +'%a %b %d %Y')
+#RPMAUTHOR = $(shell git log | grep ^Author: | head -n 1 | cut -d ' ' -f 2,3,4)
+RPMAUTHOR = David Cantrell <[email protected]>
+
+# Various things we need to generate a tarball
+PKG = $(shell rpmspec -P "$(SPEC_TEMPLATE)" | grep ^Name: | awk '{ print $$2; }')
+VER = $(shell rpmspec -P "$(SPEC_TEMPLATE)" | grep ^Version: | awk '{ print $$2; }')
+
+ifeq ($(BUILDTYPE),copr)
+GITDATE          = $(shell date +'%Y%m%d%H%M')
+GITHASH          = $(shell git rev-parse --short HEAD)
+TARBALL_BASENAME = $(PKG)-$(VER)-$(GITDATE)git$(GITHASH)
+TAG              = HEAD
+else
+0TAG             = $(shell git tag -l | sort -V | tail -n 1)
+endif
+
+ifeq ($(BUILDTYPE),release)
+TARBALL_BASENAME = $(PKG)-$(VER)
+endif
+
+# Where to insert the changelog entry
+STARTING_POINT = $(shell expr $(shell grep -n ^%changelog "$(SPEC)" | cut -d ':' -f 1) + 1)
+
+srpm:
+	sed -i -e '1i %global source_date_epoch_from_changelog 0' "$(SPEC)"
+	sed -e 's|%%VERSION%%|$(VER)|g' < "$(SPEC_TEMPLATE)" > "$(SPEC)".new
+	mv "$(SPEC)".new "$(SPEC)"
+ifeq ($(BUILDTYPE),copr)
+	sed -i -e '/^Release:/ s/1[^%]*/0.1.$(GITDATE)git$(GITHASH)/' "$(SPEC)"
+	sed -i -e 's|^Source0:.*$$|Source0: $(TARBALL_BASENAME).tar.gz|g' "$(SPEC)"
+	sed -i -e 's|^%autosetup.*$$|%autosetup -n $(TARBALL_BASENAME)|g' "$(SPEC)"
+	sed -i -e '$(STARTING_POINT)a\\' "$(SPEC)"
+	sed -i -e '$(STARTING_POINT)a - Build $(PKG)-$(VER)-$(GITDATE)git$(GITHASH) snapshot' "$(SPEC)"
+	sed -i -e '$(STARTING_POINT)a * $(RPMDATE) $(RPMAUTHOR) - $(VER)-$(GITDATE)git$(GITHASH)' "$(SPEC)"
+endif
+	git archive \
+		--format=tar \
+		--output='$(topdir)/$(TARBALL_BASENAME).tar' \
+		--prefix='$(TARBALL_BASENAME)/' $(TAG) $(topdir)
+	gzip -9f $(topdir)/$(TARBALL_BASENAME).tar
+	rpmbuild \
+		-bs --nodeps \
+		--define "_sourcedir $(topdir)" \
+		--define "_srcrpmdir $(outdir)" \
+		--define "_rpmdir $(outdir)" "$(SPEC)"