1 files changed, 76 insertions, 0 deletions
diff --git a/mknetboot.sh b/mknetboot.sh
new file mode 100755
index 0000000..91087de
--- /dev/null
+++ b/mknetboot.sh
@@ -0,0 +1,76 @@
+#!/bin/sh -e
+
+ARCH=$(apk --print-arch)
+FLAVOR="vanilla"
+FEATURE="base squashfs network zfs"
+PACKAGE="spl-vanilla zfs-vanilla"
+OUTDIR="$PWD/out"
+RELEASE="edge"
+MIRROR="http://dl-cdn.alpinelinux.org/alpine"
+
+usage() {
+	local ws=$(printf %${#0}s)
+	cat <<-EOF
+
+	    $0                  [--arch ARCH] [--flavor FLAVOR] [--feature FEATURE]
+	    $ws                  [--outdir OUTDIR] [--release RELEASE] [--repository REPO]
+	    $0                  --help
+
+	    options:
+	    --arch              Specify which architecture images to build
+	    --flavor            Specify which kernel flavor images to build
+	    --feature           Specify which initramfs features to include
+	    --package           Additional module or firmware package
+	    --outdir            Specify directory for the created images
+	    --release           Build images for specified release from main repository
+	    --repository        Package repository to use (overides --release)
+	    --extra-repository  Add repository to search packages from (overides --release)
+
+	EOF
+}
+
+# parse parameters
+while [ $# -gt 0 ]; do
+	opt="$1"
+	shift
+	case "$opt" in
+		--arch) ARCH="$1"; shift ;;
+		--flavor) FLAVOR="$1"; shift ;;
+		--feature) FEATURE="$1"; shift ;;
+		--outdir) OUTDIR="$1"; shift ;;
+		--release) RELEASE="$1"; shift ;;
+		--repository) REPO="$1"; shift ;;
+		--extra-repository) EXTRAREPO="$EXTRAREPO $1"; shift ;;
+		--) break ;;
+		-*) usage; exit 1;;
+	esac
+done
+
+rm -rf "$OUTDIR"
+mkdir -p "$OUTDIR"
+
+REPOFILE=$(mktemp)
+DEFAULT_REPO="$MIRROR/$RELEASE/main"
+echo "${REPO:-$DEFAULT_REPO}" >> "$REPOFILE"
+for repo in $EXTRAREPO; do
+	echo "$repo" >> "$REPOFILE"
+done
+
+echo "Creating netboot image: $RELEASE/$ARCH/$FLAVOR"
+
+update-kernel \
+	--arch "$ARCH" \
+	--flavor "$FLAVOR" \
+	--feature "$FEATURE" \
+	--package "$PACKAGE" \
+	--repositories-file "$REPOFILE" \
+	"$OUTDIR"
+
+# older vanilla kernels do not have the flavor appended.
+for file in vmlinuz config System.map; do
+	if [ -f "$OUTDIR"/$file ]; then
+		mv "$OUTDIR"/$file "$OUTDIR"/$file-"$FLAVOR"
+	fi
+done
+
+rm -f "$REPOFILE"