Implement backport-<commit> target

For packages with a GitHub repo configured in options.conf, allow
downloading and applying backport patches via the 'backport-<commit>'
target. If given an abbreviated commit ID, it will still create a
backport-<commit>.patch file with the full commit hash, plus add it (if
it does not already exist) to the end of the series file.

Because this handles a single commit at a time, this should be wrappable
by a future Makefile target that applies individual commits to catch up
to a target tag, for example.

Makefile.common

@@ -582,6 +582,36 @@ cloc: $(SRPMFILE)
 	@$(MOCK) --clean --scrub=chroot --uniqueext=$(PKG_NAME)
 	cat results/cloc.txt
 
+#help backport-<commit>: Retrieve a commit from the upstream git repository and save it as a backport patch.
+#help Currently only works with GitHub repositories. The giturl is read from options.conf.
+backport-%:
+	@commit=$*; \
+	echo "Backporting commit: $${commit}"; \
+	giturl=$$(grep -E '^giturl\s*=\s*https://github.com' options.conf | sed 's/giturl\s*=\s*//' | sed 's/\.git$$//' | sed 's/\/$$//' 2>/dev/null); \
+	if [[ -z "$${giturl}" ]]; then \
+		echo "Error: giturl not defined in options.conf"; \
+		exit 1; \
+	fi; \
+	if ! curl -s -L -o $@.patch $${giturl}/commit/$*.patch || [[ "Not Found" == $$(< $@.patch) ]]; then \
+		rm -f $@.patch; \
+		echo "Error: Failed to download commit $*"; \
+		exit 1; \
+	fi; \
+	patch=$@.patch; \
+	full_commit=$$(head -1 $@.patch | grep -oE '\b$*\S+' 2>/dev/null); \
+	if ! [[ -z "$${full_commit}" ]]; then \
+		patch=backport-$${full_commit}.patch; \
+		mv $@.patch $${patch}; \
+	fi; \
+	if [[ -s $${patch} ]]; then \
+		echo "$${patch} created"; \
+		grep -qE "^$${patch}$$" series 2>/dev/null || echo "$${patch}" >> series; \
+	else \
+		rm -f $${patch}; \
+		echo "Error: Failed to create backport patch"; \
+		exit 1; \
+	fi \
+
 .PHONY: whatrequires
 #help whatrequires: Output a list of packages that directly depend on this one,
 #help showing the subpackage-level breakdown. Each line of output has the format

packages

@@ -180,6 +180,7 @@ R-Ryacas
 R-SGP
 R-SGPdata
 R-SQUAREM
+R-SimDesign
 R-Sleuth2
 R-SnowballC
 R-SparseM
@@ -232,6 +233,7 @@ R-bayesplot
 R-bazar
 R-bbmle
 R-bdsmatrix
+R-beepr
 R-beeswarm
 R-bench
 R-benchr
@@ -871,6 +873,7 @@ R-rsvg
 R-runjags
 R-rversions
 R-rvest
+R-rworldmap
 R-s2
 R-sampling
 R-sandwich
@@ -1583,6 +1586,7 @@ fsearch
 fuse
 fwupd
 fwupd-efi
+game-music-emu
 garcon
 gawk
 gbinder-python
@@ -2260,6 +2264,7 @@ libmbim
 libmediaart
 libmemcached
 libmicrohttpd
+libmikmod
 libmnl
 libmodbus
 libmodplug
@@ -3915,6 +3920,7 @@ pypi-decorator
 pypi-deepmerge
 pypi-deepspeed
 pypi-dep_logic
+pypi-dependency_groups
 pypi-deprecated
 pypi-deprecation
 pypi-devpi_client
@@ -5311,6 +5317,7 @@ xrandr
 xrdb
 xrdp
 xrestop
+xscorch
 xscreensaver
 xsel
 xset