scripts: add minirootfs release image

1 files changed, 56 insertions, 0 deletions

diff --git a/scripts/genrootfs.sh b/scripts/genrootfs.sh
new file mode 100755
index 0000000000..9c9df40bb1
--- /dev/null
+++ b/scripts/genrootfs.sh
@@ -0,0 +1,56 @@
+#!/bin/sh -e
+
+cleanup() {
+	rm -rf "$tmp"
+}
+
+tmp="$(mktemp -d)"
+trap cleanup EXIT
+
+arch="$(apk --print-arch)"
+repositories_file=/etc/apk/repositories
+keys_dir=/etc/apk/keys
+
+while getopts "a:r:k:o:" opt; do
+	case $opt in
+	a) arch="$OPTARG";;
+	r) repositories_file="$OPTARG";;
+	k) keys_dir="$OPTARG";;
+	o) outfile="$OPTARG";;
+	esac
+done
+shift $(( $OPTIND - 1))
+
+cat "$repositories_file"
+
+if [ -z "$outfile" ]; then
+	outfile=$name-$arch.tar.gz
+fi
+
+${APK:-apk} add --keys-dir "$keys_dir" \
+	--repositories-file "$repositories_file" \
+	--no-script --no-cache --root "$tmp" --initdb \
+	"$@"
+for link in $("$tmp"/bin/busybox --list-full); do
+	[ -e "$tmp"/$link ] || ln -s /bin/busybox "$tmp"/$link
+done
+
+${APK:-apk} fetch --keys-dir "$keys_dir" \
+	--repositories-file "$repositories_file" \
+	--stdout alpine-base | tar -zx -C "$tmp" etc/
+
+branch=edge
+VERSION_ID=$(awk -F= '$1=="VERSION_ID" {print $2}'  "$tmp"/etc/os-release)
+case $VERSION_ID in
+*_alpha*|*_beta*) branch=edge;;
+*.*.*) branch=v${VERSION_ID%.*};;
+esac
+
+cat > "$tmp"/etc/apk/repositories <<EOF
+http://dl-cdn.alpinelinux.org/alpine/$branch/main
+http://dl-cdn.alpinelinux.org/alpine/$branch/community
+EOF
+
+#rm -rf "$tmp"/var/cache/apk/*
+
+tar --numeric-owner -c -C "$tmp" . | gzip -9n > "$outfile"