generate-delta.sh

#!/bin/bash

set -o errexit -o nounset -o pipefail

source "$(dirname ${BASH_SOURCE[0]})/common.sh"

[[ $# -eq 3 ]] || user_error "expected 3 arguments (device, source and target version)"

chrt -b -p 0 $$

PERSISTENT_KEY_DIR=keys/$1
DEVICE=$1
OLD=$2
NEW=$3

# decrypt keys in advance for improved performance and modern algorithm support
KEY_DIR=$(mktemp -d /dev/shm/generate-delta.XXXXXXXXXX)
trap "rm -rf \"$KEY_DIR\"" EXIT
cp "$PERSISTENT_KEY_DIR"/* "$KEY_DIR"
script/decrypt-keys "$KEY_DIR"

export PATH="$PWD/prebuilts/build-tools/linux-x86/bin:$PATH"
export PATH="$PWD/prebuilts/build-tools/path/linux-x86:$PATH"
export PATH="$PWD/releases/$NEW/release-$DEVICE-$NEW/bin:$PATH"

cd "releases/$NEW"

ota_from_target_files "${EXTRA_OTA[@]}" -k "$KEY_DIR/releasekey" \
    -i ../$OLD/release-$DEVICE-$OLD/$DEVICE-target_files.zip \
    release-$DEVICE-$NEW/$DEVICE-target_files.zip \
    $DEVICE-incremental-$OLD-$NEW.zip