diff --git a/README.md b/README.md
index e3d525e..96b3443 100644
--- a/README.md
+++ b/README.md
@@ -20,17 +20,17 @@
 
 # 如何使用?
 
-1. (在宿主机中) 复制`user_config.simple.json`为`user_config.json`
-1. (在宿主机中) 调整`Makefile`文件配置的配置项 `TARGET_PLATFORM` (默认: apollolake) 和 `TARGET_VERSION` (默认: 7.0 - 将会构建 7.0-41890)
-1. (在宿主机中) 构建编译镜像: `make build_image`
-1. (在宿主机中) 启动容器构建引导: `make build_boot`
+1. 复制`user_config.simple.json`为`user_config.json`
+1. 为你想要的平台和版本构建编译镜像: 
+   比如 `redpill_tool_chain.sh build apollolake-7.0-41890`
+1. 为你想要的平台和版本构建引导: 
+   比如 `redpill_tool_chain.sh img apollolake-7.0-41890`
 
-`make build_boot`运行结束之后，将会在宿主机的`./image`文件夹中生成 RedPill引导镜像。
+`redpill_tool_chain.sh img`运行结束之后，将会在宿主机的`./image`文件夹中生成 RedPill引导镜像。
 
-依赖: `make` 和 `docker`
+依赖: `docker`
 
 # 其他说明
 为了方便我自己
 - `docker/Dockerfile` 中补入了阿里云镜像
-- 如果是网络不好可以在`make build_image`之前执行`make build_download`
-- `make run_container`自定义引导构建过程
+- `redpill_tool_chain.sh run <platform_version>`自定义引导构建过程
diff --git a/README_EN.md b/README_EN.md
index b13aca5..dc941d7 100644
--- a/README_EN.md
+++ b/README_EN.md
@@ -2,36 +2,26 @@
 
 [中文说明](README.md "English")
 THX @haydibe
+# Inofficial redpill toolchain image builder
+- Creates a OCI Container (~= Docker) image based tool chain.
+- Takes care of downloading (and caching) the required sources to compile redpill.ko and the required os packages that the build process depends on.
+- Caches .pat downloads inside the container on the host.
 
-# What is this?
+## Changes
+- Migrated from Make to Bash (requires `jq`, instead of `make` now )
+- Removed Synology toolchain, the tool chain now consists  of debian packages
+- Configuration is now done in the JSON file `global_config.json`
+- The configuration allows to specify own configurations -> just copy a block underneath the `building_configs` block and make sure it has a unique value for the id attribute. The id is used what actualy is used to determine the <platform_version>.
 
-The redpill tool chain docker image builder is updated to v0.4:
+## Usage
 
-- proper DSM7 support for apollolake (thnx @jumkey)
-- switched from kernel sources based build to toolkit dev based builds for DSM6.2.4 and DSM7.0 (thnx @jumkey) 
-- make targets for bromolow and apollolake merged: platform and version must be configure in the Makefile now
-- image is ~720-780MB instead of ~1.200-1.500MB now
+1. Create `user_config.json` according https://github.com/RedPill-TTG/redpill-load
+2. Build the image for the platform and version you want:
+   `redpill_tool_chain.sh build <platform_version>`
+3. Run the image for the platform and version you want:
+   `redpill_tool_chain.sh run <platform_version>`
+4. Inside the container, run `make build_all` to build the loader for the platform_version
 
- 
-> PS: since toolkit dev lacks the required sources for fs/proc, they are taken from the extracted DSM6.2.4 kernel sources.
-The build requires the sources for this single folder, but does not use the kernel source to build the redpill.ko module. 
+Note: run `redpill_tool_chain.sh build` to get the list of supported <platform_version>
 
-If you see something is wrong in how the toolchain is build or have ideas how to make it better: please let me know.
-
-For every other problem: please address it to the community - I don't know more than others do. 
-
-> PS2: before someone asks: I haven't managed a successfull installation/migration with the created bootloader so far. I am testing exclusivly on ESXi 6.7. The migration always stops at 56% and bails out with error 13.
-
- 
-# How to use it?
-
-1. (on host) configure the Makefile and configure TARGET_PLATFORM (default: bromolow) and TARGET_VERSION (default: 6.2 - will build 6.2.4)
-1. (on host) create your own user_config.json or edit the USERCONFIG_* variables in the Makefile
-1. (on host) build image: make build_image
-1. (on host) build boot image: make build_boot
-
-After running `make build_boot` the created redpill bootloader image will be present in the ./image folder on the host.
- 
-Tested with hosts: Ubuntu 18.04 VM, Ubuntu 20.04 WSL2 and XPE  (the make binary to build on Synology/XPE can be found here)
-
-Dependencies: make and docker
\ No newline at end of file
+After set 4. the redpill load image should be build and can be found in the host folder "images".
\ No newline at end of file
diff --git a/docker/Dockerfile b/docker/Dockerfile
index 5530a2b..90ec62f 100644
--- a/docker/Dockerfile
+++ b/docker/Dockerfile
@@ -1,12 +1,9 @@
-ARG DOCKER_BASE_IMAGE=debian:8
+ARG DOCKER_BASE_IMAGE=ubuntu:20.04
 # extract kernel and toolkit dev
 FROM ${DOCKER_BASE_IMAGE} AS extract
 
-ARG TOOLKIT_DEV_FILENAME
-ADD downloads/${TOOLKIT_DEV_FILENAME} /
-
-ARG KERNEL_FILENAME
-ADD downloads/${KERNEL_FILENAME} /
+ARG KERNEL_SRC_FILENAME
+ADD downloads/${KERNEL_SRC_FILENAME} /
 
 # tool chain image
 FROM ${DOCKER_BASE_IMAGE}
@@ -16,42 +13,53 @@ RUN cp /etc/apt/sources.list /etc/apt/sources.list.bak && \
     sed  -i "s/archive.ubuntu.com/mirrors.aliyun.com/g" /etc/apt/sources.list && \
     sed  -i "s/security.ubuntu.com/mirrors.aliyun.com/g" /etc/apt/sources.list && \
     apt-get update && \    
-    apt-get install --yes --no-install-recommends ca-certificates build-essential git libssl-dev curl cpio bspatch vim gettext bc bison flex dosfstools kmod bsdiff patch jq xz-utils && \
+    apt-get install --yes --no-install-recommends ca-certificates build-essential git libssl-dev curl cpio bspatch vim gettext bc bison flex dosfstools kmod jq && \
     rm -rf /var/lib/apt/lists/* /tmp/*
 
-ARG TOOLCHAIN_FILENAME
-ADD downloads/${TOOLCHAIN_FILENAME} /opt/
-
 ARG REDPILL_LKM_REPO=https://github.com/RedPill-TTG/redpill-lkm.git
 ARG REDPILL_LKM_BRANCH=master
-RUN git clone --depth 1 ${REDPILL_LKM_REPO} -b ${REDPILL_LKM_BRANCH} /opt/redpill-lkm
+ARG REDPILL_LKM_SRC=/opt/redpill-lkm
 
-ARG REDPILL_LOAD=https://github.com/RedPill-TTG/redpill-load.git
+ARG REDPILL_LOAD_REPO=https://github.com/RedPill-TTG/redpill-load.git
 ARG REDPILL_LOAD_BRANCH=master
-RUN git clone --depth 1 ${REDPILL_LOAD} -b ${REDPILL_LOAD_BRANCH} /opt/redpill-load
+ARG REDPILL_LOAD_SRC=/opt/redpill-load
+
+RUN git clone --depth 1 ${REDPILL_LKM_REPO} -b ${REDPILL_LKM_BRANCH}  ${REDPILL_LKM_SRC} && \
+    git clone --depth 1 ${REDPILL_LOAD_REPO} -b ${REDPILL_LOAD_BRANCH} ${REDPILL_LOAD_SRC}
 
-ARG TARGET_VERSION
 ARG TARGET_PLATFORM
-COPY --from=extract /usr/local/x86_64-pc-linux-gnu/x86_64-pc-linux-gnu/sys-root/usr/lib/modules/DSM-${TARGET_VERSION}/build /opt/redpill-lkm/kernel-${TARGET_PLATFORM}-${TARGET_VERSION}
-COPY --from=extract /linux*/fs/proc/ /opt/redpill-lkm/kernel-${TARGET_PLATFORM}-${TARGET_VERSION}/fs/proc/
+ARG TARGET_VERSION
+ARG DSM_VERSION
+ARG COMPILE_WITH
+ARG TARGET_REVISION
+
+ENV ARCH=x86_64 \
+    LINUX_SRC=${REDPILL_LKM_SRC}/${COMPILE_WITH}-${TARGET_PLATFORM}-${TARGET_VERSION}-${TARGET_REVISION} \
+    REDPILL_LKM_SRC=${REDPILL_LKM_SRC} \
+    REDPILL_LOAD_SRC=${REDPILL_LOAD_SRC} \
+    TARGET_PLATFORM=${TARGET_PLATFORM} \
+    TARGET_VERSION=${TARGET_VERSION} \
+    TARGET_REVISION=${TARGET_REVISION}
+
+ARG EXTRACTED_KSRC
+COPY --from=extract ${EXTRACTED_KSRC} ${LINUX_SRC}
+
+RUN if [ "apollolake" = "$TARGET_PLATFORM" ]; then echo '+' > ${LINUX_SRC}/.scmversion; fi && \
+    if [ "$COMPILE_WITH" = "kernel" ]; then \
+        cp ${LINUX_SRC}/synoconfigs/${TARGET_PLATFORM} ${LINUX_SRC}/.config && \
+        make -C ${LINUX_SRC} oldconfig && \
+        make -C ${LINUX_SRC} modules_prepare ;\
+    fi
 
 WORKDIR "/opt"
 
 COPY Makefile user_config.json.template /opt/
-ARG BUILD_REDPILL_LOADER_VERSION
 ARG USERCONFIG_VID=<fill me>
 ARG USERCONFIG_PID=<fill me>
 ARG USERCONFIG_SN=<fill me>
 ARG USERCONFIG_MAC1=<fill me>
 
-#    LINUX_SRC=/usr/local/x86_64-pc-linux-gnu/x86_64-pc-linux-gnu/sys-root/usr/lib/modules/DSM-${TARGET_VERSION}/build \
-
-ENV ARCH=x86_64 \
-    CROSS_COMPILE=/opt/x86_64-pc-linux-gnu/bin/x86_64-pc-linux-gnu- \
-    LINUX_SRC=/opt/redpill-lkm/kernel-${TARGET_PLATFORM}-${TARGET_VERSION} \
-    TARGET_PLATFORM=${TARGET_PLATFORM} \
-    BUILD_REDPILL_LOADER_VERSION=${BUILD_REDPILL_LOADER_VERSION} \
-    USERCONFIG_VID=${USERCONFIG_VID} \
+ENV USERCONFIG_VID=${USERCONFIG_VID} \
     USERCONFIG_PID=${USERCONFIG_PID} \
     USERCONFIG_SN=${USERCONFIG_SN} \
     USERCONFIG_MAC1=${USERCONFIG_MAC1}
diff --git a/docker/Makefile b/docker/Makefile
index 32a0611..c325b0a 100644
--- a/docker/Makefile
+++ b/docker/Makefile
@@ -5,10 +5,12 @@ SHELL := bash
 .DELETE_ON_ERROR:
 .SUFFIXES:
 
-export REDPILL_SRC        := /opt/redpill-lkm
-export REDPILL_LOADER_SRC := /opt/redpill-load
+export REDPILL_LKM_SRC    := ${REDPILL_LKM_SRC}
+export REDPILL_LOAD_SRC   := ${REDPILL_LOAD_SRC}
 
-export TARGET_PLATFORM     :=${TARGET_PLATFORM}
+export TARGET_PLATFORM    := ${TARGET_PLATFORM}
+export TARGET_VERSION     := ${TARGET_VERSION}
+export TARGET_REVISION    := ${TARGET_REVISION}
 export LINUX_SRC          := ${LINUX_SRC}
 
 export USERCONFIG_VID     := ${USERCONFIG_VID}
@@ -16,43 +18,41 @@ export USERCONFIG_PID     := ${USERCONFIG_PID}
 export USERCONFIG_SN      := ${USERCONFIG_SN}
 export USERCONFIG_MAC1    := ${USERCONFIG_MAC1}
 
-export BUILD_REDPILL_LOADER_VERSION := ${BUILD_REDPILL_LOADER_VERSION}
-
 .PHONY: all
 all:
 	@echo "Possible Targets:"
-	@cat Makefile |grep .PHONY[:] |cut -f2 -d ' ' |xargs -n1 echo " - " |grep -v " -  all"
+	@less Makefile |grep .PHONY[:] |cut -f2 -d ' ' |xargs -n1 echo " - " |grep -v " -  all"
 
 .PHONY: build_redpill_lkm
 build_redpill_lkm:
-	@$(MAKE) -C $(REDPILL_SRC) LINUX_SRC=$(LINUX_SRC) && \
+	@$(MAKE) -C $(REDPILL_LKM_SRC) LINUX_SRC=$(LINUX_SRC) && \
 	echo "#############################################" && \
-	modinfo $(REDPILL_SRC)/redpill.ko
+	modinfo $(REDPILL_LKM_SRC)/redpill.ko
 
 .PHONY: build_redpill_load
 build_redpill_load:
-	@mkdir -p $(REDPILL_LOADER_SRC)/ext/rp-lkm/
-	@if [ ! -e $(REDPILL_LOADER_SRC)/user_config.json ]; then envsubst < user_config.json.template > $(REDPILL_LOADER_SRC)/user_config.json; fi
+	@mkdir -p $(REDPILL_LOAD_SRC)/ext/rp-lkm/
+	@if [ ! -e $(REDPILL_LOAD_SRC)/user_config.json ]; then envsubst < user_config.json.template > $(REDPILL_LOAD_SRC)/user_config.json; fi
 	@echo "#############################################" && \
-	echo "Using user_config.json:" && cat $(REDPILL_LOADER_SRC)/user_config.json && \
+	echo "Using user_config.json:" && cat $(REDPILL_LOAD_SRC)/user_config.json && \
 	echo "#############################################"
 	@if [ "$(TARGET_PLATFORM)" == "bromolow" ]; then \
-		pushd $(REDPILL_LOADER_SRC) && \
-		if [ "$(BUILD_REDPILL_LOADER_VERSION)" == "7.0-41890" ];then \
-			cp -f $(REDPILL_SRC)/redpill.ko $(REDPILL_LOADER_SRC)/ext/rp-lkm/redpill-linux-v3.10.108.ko ; \
+		pushd $(REDPILL_LOAD_SRC) && \
+		if [ "$(TARGET_VERSION)-$(TARGET_REVISION)" == "7.0-41222" ];then \
+			cp -f $(REDPILL_LKM_SRC)/redpill.ko $(REDPILL_LOAD_SRC)/ext/rp-lkm/redpill-linux-v3.10.108.ko ; \
 		else \
-			cp -f $(REDPILL_SRC)/redpill.ko $(REDPILL_LOADER_SRC)/ext/rp-lkm/redpill-linux-v3.10.105.ko ; \
+			cp -f $(REDPILL_LKM_SRC)/redpill.ko $(REDPILL_LOAD_SRC)/ext/rp-lkm/redpill-linux-v3.10.105.ko ; \
 		fi && \
-		./build-loader.sh 'DS3615xs' '$(BUILD_REDPILL_LOADER_VERSION)'; \
+		./build-loader.sh 'DS3615xs' '$(TARGET_VERSION)-$(TARGET_REVISION)'; \
 	fi
 	@if [ "$(TARGET_PLATFORM)" == "apollolake" ]; then \
-		pushd $(REDPILL_LOADER_SRC) && \
-		if [ "$(BUILD_REDPILL_LOADER_VERSION)" == "7.0-41890" ];then \
-			cp -f $(REDPILL_SRC)/redpill.ko $(REDPILL_LOADER_SRC)/ext/rp-lkm/redpill-linux-v4.4.180+.ko; \
+		pushd $(REDPILL_LOAD_SRC) && \
+		if [ "$(TARGET_VERSION)-$(TARGET_REVISION)" == "7.0-41890" ];then \
+			cp -f $(REDPILL_LKM_SRC)/redpill.ko $(REDPILL_LOAD_SRC)/ext/rp-lkm/redpill-linux-v4.4.180+.ko; \
 		else \
-			cp -f $(REDPILL_SRC)/redpill.ko $(REDPILL_LOADER_SRC)/ext/rp-lkm/redpill-linux-v4.4.59+.ko; \
+			cp -f $(REDPILL_LKM_SRC)/redpill.ko $(REDPILL_LOAD_SRC)/ext/rp-lkm/redpill-linux-v4.4.59+.ko; \
 		fi && \
-		./build-loader.sh 'DS918+' '$(BUILD_REDPILL_LOADER_VERSION)'; \
+		./build-loader.sh 'DS918+' '$(TARGET_VERSION)-$(TARGET_REVISION)'; \
 	fi
 
 .PHONY: build_all
@@ -60,4 +60,4 @@ build_all: build_redpill_lkm build_redpill_load
 
 .PHONY: clean_redpill_lkm
 clean_redpill_lkm:
-	@$(MAKE) -C $(REDPILL_SRC) clean
+	@$(MAKE) -C $(REDPILL_LKM_SRC) clean
diff --git a/global_config.json b/global_config.json
new file mode 100644
index 0000000..f244aae
--- /dev/null
+++ b/global_config.json
@@ -0,0 +1,81 @@
+{
+    "docker": {
+        "use_buildkit": "true",
+        "image_name": "redpill-tool-chain",
+        "download_folder": "docker/downloads"
+    },
+    "build_configs": [
+        {
+            "id": "bromolow-6.2.4-25556",
+            "platform_version": "bromolow-6.2.4-25556",
+            "docker_base_image": "debian:8-slim",
+            "compile_with": "kernel",
+            "download_urls": {
+                "kernel": "https://sourceforge.net/projects/dsgpl/files/Synology%20NAS%20GPL%20Source/25426branch/bromolow-source/linux-3.10.x.txz/download",
+                "toolkit_dev": "https://sourceforge.net/projects/dsgpl/files/toolkit/DSM6.2/ds.bromolow-6.2.dev.txz/download"
+            },
+            "redpill_lkm": {
+                "source_url": "https://github.com/RedPill-TTG/redpill-lkm.git",
+                "branch": "master"
+            },
+            "redpill_load": {
+                "source_url": "https://github.com/RedPill-TTG/redpill-load.git",
+                "branch": "master"
+            }
+        },
+        {
+            "id": "bromolow-7.0-41222",
+            "platform_version": "bromolow-7.0-41222",
+            "docker_base_image": "debian:8-slim",
+            "compile_with": "toolkit_dev",
+            "download_urls": {
+                "kernel": "https://sourceforge.net/projects/dsgpl/files/Synology%20NAS%20GPL%20Source/25426branch/bromolow-source/linux-3.10.x.txz/download",
+                "toolkit_dev": "https://sourceforge.net/projects/dsgpl/files/toolkit/DSM7.0/ds.bromolow-7.0.dev.txz/download"
+            },
+            "redpill_lkm": {
+                "source_url": "https://github.com/RedPill-TTG/redpill-lkm.git",
+                "branch": "master"
+            },
+            "redpill_load": {
+                "source_url": "https://github.com/RedPill-TTG/redpill-load.git",
+                "branch": "master"
+            }
+        },
+        {
+            "id": "apollolake-6.2.4-25556",
+            "platform_version": "apollolake-6.2.4-25556",
+            "docker_base_image": "debian:8-slim",
+            "compile_with": "kernel",
+            "download_urls": {
+                "kernel": "https://sourceforge.net/projects/dsgpl/files/Synology%20NAS%20GPL%20Source/25426branch/apollolake-source/linux-4.4.x.txz/download",
+                "toolkit_dev": "https://sourceforge.net/projects/dsgpl/files/toolkit/DSM6.2/ds.apollolake-6.2.dev.txz/download"
+            },
+            "redpill_lkm": {
+                "source_url": "https://github.com/RedPill-TTG/redpill-lkm.git",
+                "branch": "master"
+            },
+            "redpill_load": {
+                "source_url": "https://github.com/RedPill-TTG/redpill-load.git",
+                "branch": "master"
+            }
+        },
+        {
+            "id": "apollolake-7.0-41890",
+            "platform_version": "apollolake-7.0-41890",
+            "docker_base_image": "debian:10-slim",
+            "compile_with": "toolkit_dev",
+            "download_urls": {
+                "kernel": "https://sourceforge.net/projects/dsgpl/files/Synology%20NAS%20GPL%20Source/25426branch/apollolake-source/linux-4.4.x.txz/download",
+                "toolkit_dev": "https://sourceforge.net/projects/dsgpl/files/toolkit/DSM7.0/ds.apollolake-7.0.dev.txz/download"
+            },
+            "redpill_lkm": {
+                "source_url": "https://github.com/RedPill-TTG/redpill-lkm.git",
+                "branch": "master"
+            },
+            "redpill_load": {
+                "source_url": "https://github.com/jumkey/redpill-load.git",
+                "branch": "7.0-41890"
+            }
+        }
+    ]
+}
\ No newline at end of file
diff --git a/redpill_tool_chain.sh b/redpill_tool_chain.sh
new file mode 100755
index 0000000..31d15a6
--- /dev/null
+++ b/redpill_tool_chain.sh
@@ -0,0 +1,153 @@
+##!/usr/bin/env bash
+set -eu
+
+USERCONFIG_VID=changeme
+USERCONFIG_PID=changeme
+USERCONFIG_SN=changeme
+USERCONFIG_MAC1=changeme
+
+function readConfig() {
+    cat global_config.json
+}
+
+function getValueByJsonPath(){
+    local JSONPATH=${1}
+    local CONFIG=${2}
+    jq -r "${JSONPATH}" <<<${CONFIG}
+}
+
+function buildImage(){
+    [ "${USE_BUILDKIT}" == "true" ] && export DOCKER_BUILDKIT=1
+    docker build --file docker/Dockerfile --force-rm  --pull \
+        --build-arg DOCKER_BASE_IMAGE="${DOCKER_BASE_IMAGE}" \
+        --build-arg COMPILE_WITH="${COMPILE_WITH}" \
+        --build-arg EXTRACTED_KSRC="${EXTRACTED_KSRC}" \
+        --build-arg KERNEL_SRC_FILENAME="$( [ "${COMPILE_WITH}" == "kernel" ] && echo "${KERNEL_FILENAME}" || echo "${TOOLKIT_DEV_FILENAME}")" \
+        --build-arg REDPILL_LKM_REPO="${REDPILL_LKM_REPO}" \
+        --build-arg REDPILL_LKM_BRANCH="${REDPILL_LKM_BRANCH}" \
+        --build-arg REDPILL_LOAD_REPO="${REDPILL_LOAD_REPO}" \
+        --build-arg REDPILL_LOAD_BRANCH="${REDPILL_LOAD_BRANCH}" \
+        --build-arg TARGET_PLATFORM="${TARGET_PLATFORM}" \
+        --build-arg TARGET_VERSION="${TARGET_VERSION}" \
+        --build-arg DSM_VERSION="${DSM_VERSION}" \
+        --build-arg TARGET_REVISION="${TARGET_REVISION}" \
+        --build-arg USERCONFIG_VID="${USERCONFIG_VID}" \
+        --build-arg USERCONFIG_PID="${USERCONFIG_PID}" \
+        --build-arg USERCONFIG_SN="${USERCONFIG_SN}" \
+        --build-arg USERCONFIG_MAC1="${USERCONFIG_MAC1}" \
+        -t ${DOCKER_IMAGE_NAME}:${TARGET_PLATFORM}-${TARGET_VERSION}-${TARGET_REVISION} ./docker
+    }
+
+function runContainer(){
+    config=$( [ -e user_config.json ] && echo "-v ${PWD}/user_config.json:/opt/redpill-load/user_config.json")
+    final_cmd="docker run -ti --rm --privileged -v /dev:/dev \
+        -v ${REDPILL_LOAD_CACHE}:/opt/redpill-load/cache \
+        -v ${REDPILL_LOAD_IMAGES}:/opt/redpill-load/images \
+        $config \
+        -e USERCONFIG_VID="${USERCONFIG_VID}" \
+        -e USERCONFIG_PID="${USERCONFIG_PID}" \
+        -e USERCONFIG_SN="${USERCONFIG_SN}" \
+        -e USERCONFIG_MAC1="${USERCONFIG_MAC1}" \
+        -e TARGET_PLATFORM="${TARGET_PLATFORM}" \
+        -e TARGET_VERSION="${TARGET_VERSION}" \
+        -e DSM_VERSION="${DSM_VERSION}" \
+        -e REVISION="${TARGET_REVISION}" \
+        ${DOCKER_IMAGE_NAME}:${TARGET_PLATFORM}-${TARGET_VERSION}-${TARGET_REVISION} bash $@"
+    eval ${final_cmd}
+}
+
+function downloadFromUrlIfNotExists(){
+    local DOWNLOAD_URL="${1}"
+    local OUT_FILE="${2}"
+    local MSG="${3}"
+    if [ ! -e ${OUT_FILE} ]; then
+        echo "Downloading ${MSG}"
+        curl --progress-bar --location ${DOWNLOAD_URL} --output ${OUT_FILE}
+    fi
+}
+
+function showHelp(){
+cat << EOF
+Usage: ${0} <action> <platform version>
+
+Actions: build run img debug
+
+Available platform versions:
+---------------------
+${AVAILABLE_IDS}
+EOF
+}
+
+# mount-bind host folder with absolute path into redpill-load cache folder
+# will not work with relativfe path! If single name is used, a docker volume will be created!
+REDPILL_LOAD_CACHE=${PWD}/cache
+
+# mount bind hots folder with absolute path into redpill load images folder
+REDPILL_LOAD_IMAGES=${PWD}/images
+
+
+####################################################
+# Do not touch anything below, unless you know what you are doing...
+####################################################
+
+# parse paramters from config
+CONFIG=$(readConfig)
+AVAILABLE_IDS=$(getValueByJsonPath ".build_configs[].id" "${CONFIG}")
+
+if [ $# -lt 2 ]; then
+    showHelp
+    exit 1
+fi
+
+ACTION=${1}
+ID=${2}
+BUILD_CONFIG=$(getValueByJsonPath ".build_configs[] | select(.id==\"${ID}\")" "${CONFIG}")
+if [ -z "${BUILD_CONFIG}" ];then
+    echo "Error: Platform version ${ID} not specified in global_config.json"
+    echo
+    showHelp
+    exit 1
+fi
+USE_BUILDKIT=$(getValueByJsonPath ".docker.use_buildkit" "${CONFIG}")
+DOCKER_IMAGE_NAME=$(getValueByJsonPath ".docker.image_name" "${CONFIG}")
+DOWNLOAD_FOLDER=$(getValueByJsonPath ".docker.download_folder" "${CONFIG}")
+TARGET_PLATFORM=$(getValueByJsonPath ".platform_version | split(\"-\")[0]" "${BUILD_CONFIG}")
+TARGET_VERSION=$(getValueByJsonPath ".platform_version | split(\"-\")[1]" "${BUILD_CONFIG}")
+DSM_VERSION=$(getValueByJsonPath ".platform_version | split(\"-\")[1][0:3]" "${BUILD_CONFIG}")
+TARGET_REVISION=$(getValueByJsonPath ".platform_version | split(\"-\")[2]" "${BUILD_CONFIG}")
+DOCKER_BASE_IMAGE=$(getValueByJsonPath ".docker_base_image" "${BUILD_CONFIG}")
+KERNEL_DOWNLOAD_URL=$(getValueByJsonPath ".download_urls.kernel" "${BUILD_CONFIG}")
+COMPILE_WITH=$(getValueByJsonPath ".compile_with" "${BUILD_CONFIG}")
+KERNEL_FILENAME=$(getValueByJsonPath ".download_urls.kernel | split(\"/\")[] | select ( . | endswith(\".txz\"))" "${BUILD_CONFIG}")
+TOOLKIT_DEV_DOWNLOAD_URL=$(getValueByJsonPath ".download_urls.toolkit_dev" "${BUILD_CONFIG}")
+TOOLKIT_DEV_FILENAME=$(getValueByJsonPath ".download_urls.toolkit_dev | split(\"/\")[] | select ( . | endswith(\".txz\"))" "${BUILD_CONFIG}")
+REDPILL_LKM_REPO=$(getValueByJsonPath ".redpill_lkm.source_url" "${BUILD_CONFIG}")
+REDPILL_LKM_BRANCH=$(getValueByJsonPath ".redpill_lkm.branch" "${BUILD_CONFIG}")
+REDPILL_LOAD_REPO=$(getValueByJsonPath ".redpill_load.source_url" "${BUILD_CONFIG}")
+REDPILL_LOAD_BRANCH=$(getValueByJsonPath ".redpill_load.branch" "${BUILD_CONFIG}")
+
+EXTRACTED_KSRC='/linux*'
+if [ "${COMPILE_WITH}" == "toolkit_dev" ]; then
+    EXTRACTED_KSRC="/usr/local/x86_64-pc-linux-gnu/x86_64-pc-linux-gnu/sys-root/usr/lib/modules/DSM-${DSM_VERSION}/build/"
+fi
+
+case "${ACTION}" in
+    build)  downloadFromUrlIfNotExists "${KERNEL_DOWNLOAD_URL}" "${DOWNLOAD_FOLDER}/${KERNEL_FILENAME}" "Kernel"
+            downloadFromUrlIfNotExists "${TOOLKIT_DEV_DOWNLOAD_URL}" "${DOWNLOAD_FOLDER}/${TOOLKIT_DEV_FILENAME}" "Toolkit Dev"
+            buildImage
+            ;;
+    img)   runContainer -c "'make build_all'"
+            ;;
+    debug)  runContainer -c "'BRP_DEBUG=1 make build_all'"
+            ;;
+    run)    runContainer
+            ;;
+    *)      if [ ! -z ${ACTION} ];then
+                echo "Error: action ${ACTION} does not exist"
+                echo ""
+            fi
+            showHelp
+            exit 1
+            ;;
+esac
+