diff --git a/build.sh b/build.sh
new file mode 100755
index 0000000..6f236e8
--- /dev/null
+++ b/build.sh
@@ -0,0 +1,97 @@
+#!/bin/sh
+
+FIRMWARE_URL="http://downloads.bremen.freifunk.net/firmware/"
+LOCAL_SUFFIX="bremen"
+GLUON_DIR="gluon/"
+KEYFILE="$HOME/.ecdsakey"
+
+set -eu
+
+export GLUON_SITEDIR="$(dirname "$(readlink -f "$0")")"
+
+get_gluon_tag() {
+  if ! git --git-dir="${GLUON_DIR}/.git" describe --exact-match; then
+    echo 'The gluon tree is not checked out at a tag.'
+    echo 'Please use `git checkout <tagname>` to use an official gluon release'
+    echo 'or build it manually. Only with at a tag we can autogenerate the'
+    echo 'release string!'
+    exit 1
+  fi
+}
+
+get_last_release() {
+  branch="$1"
+  wget -q -O- "${FIRMWARE_URL}/${branch}/sysupgrade/${branch}.manifest" | \
+    awk 'parse == 1 { print $2; exit } /^$/ { parse=1 }'
+}
+
+is_based_on() {
+  [ "${1#$2}" != "${1}" ]
+  return $?
+}
+
+extract_local_version() {
+  local_version_tmp="${1#*+${LOCAL_SUFFIX}}"
+  local_version="${local_version_tmp%~testing}"
+}
+
+if [ "$#" != 1 ]; then
+  cat <<USAGE
+Usage: $(basename $0) <branch>
+
+This script takes the intended branch, "testing" or "stable", as the single
+parameter. It then tries to autodetermine the correct release name, builds
+gluon for the corresponding branch and all supported platforms (excluding
+x86*), and optionally signs it if an ecdsutils keyfile is found (standard path:
+~/.ecdsakey)
+USAGE
+  exit 1
+fi
+
+branch="$1"
+case "$branch" in
+  testing|stable)
+    gluon_tag="$(get_gluon_tag)"
+    # remove prefixed "v"
+    gluon_tag="${gluon_tag#v}"
+    echo "Building Gluon ${gluon_tag} as ${branch}"
+    last_release_testing="$(get_last_release testing)"
+    last_release_stable="$(get_last_release stable)"
+    echo "Last release in branch testing was ${last_release_testing}"
+    if is_based_on "$last_release_testing" "$gluon_tag"; then
+      local_version="$(extract_local_version "$last_release_testing")"
+      if [ "$branch" != "stable" ]; then
+        local_version="$(($local_version + 1))"
+      fi
+    elif [ "$branch" = "stable" ] && is_based_on "$last_release_stable" "$gluon_tag"; then
+      local_version="$(extract_local_version "$last_release_stable")"
+      local_version="$(($local_version + 1))"
+    else
+      # new gluon version => reset local version number
+      local_version=1
+    fi
+    if [ "$branch" = "testing" ]; then
+      local_version="${local_version}~testing"
+    fi
+    auto_determined_release="${gluon_tag}+${LOCAL_SUFFIX}${local_version}"
+    read -p "Release name for this build [default: ${auto_determined_release}]: " GLUON_RELEASE
+    export GLUON_RELEASE="${GLUON_RELEASE:-$auto_determined_release}"
+    export GLUON_BRANCH="$branch"
+    ;;
+  *)
+    echo "Branch not supported yet!"
+    exit 1
+    ;;
+esac
+
+cd "$GLUON_DIR"
+make update
+for target in ar71xx-generic ar71xx-nand mpc85xx-generic; do
+  make clean GLUON_TARGET="$target"
+  make -j5 GLUON_TARGET="$target"
+done
+make manifest
+cd ..
+if [ -n "$KEYFILE" -a -r "$KEYFILE" ]; then
+	"${GLUON_DIR}/contrib/sign.sh" "$KEYFILE" "${GLUON_DIR}/images/sysupgrade/${GLUON_BRANCH}.manifest"
+fi