build/prefetch: make it like clean, add packages option

README.md

@@ -135,9 +135,16 @@ distribution files before running the actual build:
 
     # make distfiles
 
-Compiled base and kernel sets can be prefetched from a mirror:
+Compiled base and kernel sets can be prefetched from a mirror,
+while removing any previously available set:
 
-    # make prefetch VERSION=version.to.prefetch
+    # make prefetch-<option>[,...] VERSION=version.to.prefetch
+
+Available prefetch options are:
+
+* base:		prefetch the base set
+* kernel:	prefetch the kernel set
+* packages:	prefetch the packages set
 
 Core packages (pristine copies) can be batch-built using:
 
@@ -160,7 +167,7 @@ via the clean script:
 
     # make clean-<option>[,...]
 
-Available options are:
+Available clean options are:
 
 * base:		remove the base set
 * distfiles:	remove the distfiles set

build/prefetch.sh

@@ -31,11 +31,23 @@ set -e
 
 MIRROR="https://pkg.opnsense.org/sets"
 
-sh ./clean.sh base kernel
-
-URL="${MIRROR}/base-${PRODUCT_VERSION}-${ARCH}"
-fetch -o ${SETSDIR} ${URL}.obsolete
-fetch -o ${SETSDIR} ${URL}.txz
-
-URL="${MIRROR}/kernel-${PRODUCT_VERSION}-${ARCH}"
-fetch -o ${SETSDIR} ${URL}.txz
+for ARG in ${@}; do
+	case ${ARG} in
+	base)
+		sh ./clean.sh ${ARG}
+		URL="${MIRROR}/${ARG}-${PRODUCT_VERSION}-${ARCH}"
+		fetch -o ${SETSDIR} ${URL}.obsolete
+		fetch -o ${SETSDIR} ${URL}.txz
+		;;
+	kernel)
+		sh ./clean.sh ${ARG}
+		URL="${MIRROR}/${ARG}-${PRODUCT_VERSION}-${ARCH}"
+		fetch -o ${SETSDIR} ${URL}.txz
+		;;
+	packages)
+		sh ./clean.sh ${ARG}
+		URL="${MIRROR}/${ARG}-${PRODUCT_VERSION}-${PRODUCT_FLAVOUR}-${ARCH}"
+		fetch -o ${SETSDIR} ${URL}.tar
+		;;
+	esac
+done