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ImageBuilder

A simple Makefile wrapper for OpenWrt imagebuilder

It is a simple tool that uses package templates from text files.

Other frontends

TL;DR

% cd example
% make C=config2 image

Usage

% make C=cfg_name [image|copy|install]

Where cfg_name is a folder containing the configuration described in config.mk.

  • image: Build image and put it into the cfg_name folder.
  • copy: Make image and scp it to each host in HOSTS.
  • install: All above and sysupgrade. Use with caution!

Debug

The build will be performed in /tmp/imgbldr-XXXXX folder, which will be removed afterwards. To leave it for debug, set LEAVE_BUILD:

% make LEAVE_BUILD=yes C=example image

Use listpks target to check PACKAGES:

% make C=cfg_name listpks

Configuration

See example to get instances.

cfg_name/config.mk

At least TARGET, SUBTARGET and PLATFORM must be defined.

HOSTS is set to cfg_name by default and required for copy and install targets.

IMAGE is the last part of the image file. The default is squashfs-sysupgrade.bin which is fine for most cases.

Not all imagebuilder archives and image files match the patterns:

openwrt-imagebuilder-${RELEASE}-${TARGET}-${SUBTARGET}.Linux-x86_64 openwrt-${RELEASE}-${TARGET}-${SUBTARGET}-${PLATFORM}-${IMAGE}

Forum thread.

For example, x86/64/Generic requires:

IMAGE = combined-squashfs.img.gz
image = openwrt-${RELEASE}-${TARGET}-${SUBTARGET}-${IMAGE}

and octeon requires:

IMAGE = squashfs-sysupgrade.tar
imagebuilder = openwrt-imagebuilder-${RELEASE}-${TARGET}.Linux-x86_64
image = openwrt-${RELEASE}-${TARGET}-${PLATFORM}-${IMAGE}

INSTALL_LISTS and REMOVE_LISTS contain template files from lists.

INSTALL_PKGS and REMOVE_PKGS contain individual package names.

Files from cfg_name/files directory as well as FILES_INSTALL instructions will populate a directory passed to FILES and thus be included into the image.

config.mk

The upper level config.mk is included for all configurations.

OpenWrt release

It looks like there is no simple and clear way to get the latest release. Forum thread. So RELEASE must be defined in config.mk or from the command line for now:

% make C=cfg_name RELEASE=22.03.5 image