bulk: Package seeding

Sometimes it is not necessary to build ports that has been built
elsewhere with default options.  Just pull them over and use them
if they are just dependencies of the ports we really want to build
ourselves.  In particular, we can opportunistically pull binary
packages from pkg.freebsd.org if they have the exact version we want.

Fix freebsd#319

src/etc/poudriere.conf.sample

@@ -309,3 +309,9 @@ DISTFILES_CACHE=/usr/ports/distfiles
 # processing of the queue slightly, especially for bulk -a bulds.
 # Default: no
 #HTML_TRACK_REMAINING=yes
+
+# Do package seeding or not (fetching required binary packages from a mirror
+# that has the exact version we want)
+# Default: no
+#PKG_SEEDING=yes
+#PKG_SEEDING_MIRROR=pkg.freebsd.org

src/share/poudriere/bulk.sh

@@ -55,6 +55,7 @@ Options:
                    fatal; don't skip dependent ports on findings.
     -T          -- Try to build broken ports anyway
     -F          -- Only fetch from original master_site (skip FreeBSD mirrors)
+    -s          -- Do package seeding
     -S          -- Don't recursively rebuild packages affected by other
                    packages requiring incremental rebuild. This can result
                    in broken packages if the ones updated do not retain
@@ -91,7 +92,7 @@ INTERACTIVE_MODE=0
 
 [ $# -eq 0 ] && usage
 
-while getopts "B:iIf:j:J:CcknNp:RFtrTSvwz:a" FLAG; do
+while getopts "B:iIf:j:J:CcknNp:RFtrTsSvwz:a" FLAG; do
 	case "${FLAG}" in
 		B)
 			BUILDNAME="${OPTARG}"
@@ -158,6 +159,9 @@ while getopts "B:iIf:j:J:CcknNp:RFtrTSvwz:a" FLAG; do
 		R)
 			NO_RESTRICTED=1
 			;;
+		s)
+			PKG_SEEDING=1
+			;;
 		S)
 			SKIP_RECURSIVE_REBUILD=1
 			;;

src/share/poudriere/common.sh

@@ -6710,6 +6710,10 @@ prepare_ports() {
 
 	clean_build_queue
 
+	pkg_seeding
+
+	clean_build_queue
+
 	# Call the deadlock code as non-fatal which will check for cycles
 	msg "Sanity checking build queue"
 	bset status "sanity_check_queue:"
@@ -6877,6 +6881,64 @@ load_priorities() {
 	return 0
 }
 
+pkg_seeding() {
+	[ "${PKG_SEEDING}" != "no" ] || return 0
+
+	[ "${PWD}" = "${MASTERMNT}/.p" ] || \
+	    err 1 "pkg_seeding requires PWD=${MASTERMNT}/.p"
+
+	local url url_prefix jail_version jail_arch dest
+	local seed_total seed_ok
+
+	# Set up URL prefix
+	jail_version=$(jget ${JAILNAME} version)
+	# $MARJOR_RELEASE-$SUBRELEASE.RELEASE-px --> $MARJOR_RELEASE
+	jail_version="${jail_version%%.*}"
+	jail_arch=$(jget ${JAILNAME} arch)
+	url_prefix="${PKG_SEEDING_METHOD}://${PKG_SEEDING_MIRROR}"
+	url_prefix="${url_prefix}/FreeBSD:${jail_version}:${jail_arch}/latest/All"
+
+	msg "Package seeding from ${PKG_SEEDING_MIRROR}"
+	bset status "packageseeding:"
+
+	seed_ok=0
+	parallel_start
+	while read pkgname originspec dep_reason; do
+		# Don't fetch ports explicitly requested to be built
+		# Only fetch dependencies the users don't bother being built
+		# by others
+		pkgname="${pkgname}.${PKG_EXT}"
+		url="${url_prefix}/${pkgname}"
+		dest="${PACKAGES}/All/${pkgname}"
+		if [ "${dep_reason}" != "listed" ] && [ ! -f "$dest" ]; then
+			parallel_run pkg_seeding_download "${url}" "${dest}" "${originspec}" && \
+                seed_ok=$((${seed_ok} + 1))
+		fi
+	done < "all_pkgs"
+
+	if ! parallel_stop; then
+		err 1 "Fatal errors encountered seeding packages."
+	fi
+
+	msg "Package seeding done, seeded ${seed_ok} packages."
+}
+
+pkg_seeding_download() {
+	[ $# -ne 3 ] && eargs pkg_seeding_download destination url originspec
+
+	msg_debug "Fetching seed from: $1"
+	fetch -q -a -w 1 -m -o "$2" "$1" &> /dev/null || \
+		fetch -q -a -w 1 -r -o "$2" "$1" &> /dev/null
+
+	if [ $? -eq 0 ]; then
+		msg_verbose "Successfully seeding $3 to $2"
+		return 0
+	else
+		msg_debug "Fail seeding $3"
+		return 1
+	fi
+}
+
 balance_pool() {
 	# Don't bother if disabled
 	[ ${POOL_BUCKETS} -gt 0 ] || return 0
@@ -7391,6 +7453,10 @@ DRY_RUN=0
 
 : ${HTML_TYPE:=inline}
 
+: ${PKG_SEEDING:=no}
+: ${PKG_SEEDING_METHOD:=http}
+: ${PKG_SEEDING_MIRROR:=pkg.freebsd.org}
+
 if [ -n "${MAX_MEMORY}" ]; then
 	MAX_MEMORY_BYTES="$((${MAX_MEMORY} * 1024 * 1024 * 1024))"
 fi