#!/bin/sh

repos='system/core system/extras external/libselinux external/f2fs-tools'

[ $# -eq 2 ] || exit 1
from=android-$1
to=android-$2

for r in $repos; do
  if ! [ -d "$(basename $r)/.git" ]; then
    git clone https://android.googlesource.com/platform/$r
  else
    (
      cd $(basename $r)
      git fetch
    )
  fi
done

d() {
  git diff ${from}..${to} -- "$@"
}

(
  cd core
  d adb fastboot libcutils libzipfile libsparse 
)
(
  cd extras
  d ext4_utils f2fs_utils
)
(
  cd libselinux
  d src
)