making-stickers.sh

#!/usr/bin/env bash

# Not actually executable, but a reminder for myself
# see https://lunaticgeek.com/whatsapp-stickers/
# see https://gist.github.com/patrickhammond/4ddbe49a67e5eb1b9c03#gistcomment-2903816

TMP="$(mktemp -d)"
wget https://dl.stickershop.line.naver.jp/products/0/0/1/3962468/iphone/[email protected]  --no-check-certificate
# unzip, folder is stickers@2x
cd 'stickers@2x'
convert [email protected] -gravity center -background none -extent 96x96 tray.png
mogrify -resize 512x512 -gravity center -background none -extent 512x512 -format webp *.png
for i in *.webp; do mv "${i}" "${i/@2x/}"; done
( for i in *.webp; do jq -nc '.image_file=$i' --arg i "$i" ; done ) | jq -nSM '[inputs]' > $TMP/asset_hashes.json

cd -
git clone --depth=1 [email protected]:WhatsApp/stickers.git
cd stickers/Android

brew cask install android-sdk
brew cask install homebrew/cask-versions/adoptopenjdk8
brew cask uninstall java

jenv local 1.8
unset JAVA_OPTS
export ANDROID_SDK_ROOT="/usr/local/share/android-sdk"
touch ~/.android/repositories.cfg
sdkmanager --update
sdkmanager "platform-tools" "platforms;android-28"

vi app/build.gradle
# apply plugin: 'com.android.application'
#  
#  android {
# +    lintOptions {
# +        abortOnError false
# +    }
#      //the compression of webp file during build causes problem with FileDescriptor in ContentProvider.
#      aaptOptions {
#          noCompress "webp"
#      }
#      compileSdkVersion 29
#      defaultConfig {
# -        applicationId "com.example.samplestickerapp"
# +        applicationId "xyz.nhtzr.sampleStickers"
#          minSdkVersion 15
#          targetSdkVersion 29
#          versionCode 1

jq '.sticker_packs[0]|=(.+{$stickers, $name, $tray_image_file})' app/src/main/assets/contents.json --argfile stickers $TMP/asset_hashes.json --arg name "${NAME?}" --arg tray_image_file "${TRAY_IMAGE_FILE?}" | sponge app/src/main/assets/contents.json

./gradlew build
./gradlew :app:assembleDebug