Combine images

Usage

python mk_combined_img.py [--input <filename> --output <filename>] The defaults of --input and --output are:

• ./image_config for --input
• $OUT/combined.img for --output

Prerequisite

The script will try to get environment variables $ANDROID_HOST_OUT and $OUT If you have built android these variables should exist and in place. Make sure simg2img and sgdisk are in $ANDROID_HOST_OUT, if not, do following:

$ cd $ANDROID_BUILD_TOP

$ m simg2img

$ m sgdisk

Functionality

• Combine multiple images into one image with multiple partitions
• Sparse image detection

The format of input config file

Each line with the order of </path/to/image> <partition label> <partition number>

<partition number> should be within range of [1, number of lines] and cannot be repeated.

Config file example

$OUT/sparse_system.img      system      1
$OUT/encryptionkey.img      encrypt     4
$OUT/vendor.img             vendor      5
$OUT/sparse_userdata.img    userdata    3
$OUT/cache.img              cache       2

TODO

• Output in sparse format
• Detect images that already have partitions in them.
• Auto genereate config file