emmc_image.py is a tool to generate an eMMC USER image.

Requirement:

• Python 2.7
• simg2img
  • Used to unsparse Android sparse images
  • Source code available at https://android.googlesource.com/platform/system/core/+/master/libsparse/
  • Prebuilt binaries
    • Debian >= Stretch or Ubuntu >= 17.10
      • sudo apt-get install simg2img
  • The simg2img binary should either be available in PATH or SIMG2IMG_BIN should be set to its path.
• This currently lives in AOSP here: https://android.googlesource.com/platform/system/iot/tools/

Factory image downloaded from console in both slots:

./emmc_image.py --out emmc.zip --factory_files console_build.zip --all-slots

Custom images in slot A, factory image downloaded from console in slot B:

./emmc_image.py --out emmc.zip --factory_files console_build.zip \
--all-slots \
--partition boot_a custom_boot.img \
--partition system_a custom_system.img \
--partition vbmeta_a custom_vbmeta.img

Dump partition table:

parted emmc.img