tree: 929fdcf7d2b38d344a463ec7853f77fe563d4333 [path history] [tgz]
  1. Android.bp
  2. Android.mk
  3. README.md
  4. emulator_boot_test.sh
  5. extract_ext4_image.sh
  6. extract_head_tail.sh
  7. mk_combined_img.py
  8. mk_qemu_image.sh
  9. mk_vbmeta_boot_params.sh
  10. mk_verified_boot_params.sh
  11. prebuilt/
tools/README.md

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