#!/bin/sh

# Build the OxygenFlow Android image and write it as a root file system

# tarball for `flow rootfs import` (oxygenflow#19). Run from any directory;

# the app is expected next to this repository (../oxygenhub-android), with

# its subrepos checked out. Rebuild when the app's SDK, NDK, Gradle or

# dependency versions change, or rust-core's Cargo.lock does.

set -eu

here=$(cd "$(dirname "$0")" && pwd)

dev=$(cd "$here/../../.." && pwd)

app="$dev/oxygenhub-android"

out=${1:-$here/oxygenflow-android.tar}

# Command-line tools 23.0, as Google's repository2-3.xml lists them.

CMDLINE_TOOLS=commandlinetools-linux-16111833_latest.zip

CMDLINE_TOOLS_SHA1=e025545c62a8e64c7559119566a569fb1dec5f60

GRADLE_VERSION=9.6.0

mkdir -p "$here/dl"

if [ ! -f "$here/dl/cmdline-tools.zip" ]; then

    curl -fsSL "https://dl.google.com/android/repository/$CMDLINE_TOOLS" -o "$here/dl/cmdline-tools.zip"

fi

echo "$CMDLINE_TOOLS_SHA1  $here/dl/cmdline-tools.zip" | sha1sum -c - >/dev/null

if [ ! -f "$here/dl/gradle.zip" ]; then

    curl -fsSL "https://services.gradle.org/distributions/gradle-$GRADLE_VERSION-bin.zip" -o "$here/dl/gradle.zip"

fi

# Gradle publishes each distribution's SHA-256 beside it.

want=$(curl -fsSL "https://services.gradle.org/distributions/gradle-$GRADLE_VERSION-bin.zip.sha256")

echo "$want  $here/dl/gradle.zip" | sha256sum -c - >/dev/null

# The app, without build output, and rust-core's crates vendored.

rm -rf "$here/app" "$here/vendor"

mkdir -p "$here/app"

tar -C "$app" --exclude='./build' --exclude='./app/build' --exclude='./rust-core/target' \

    --exclude='./.gradle' --exclude='./.oxy' --exclude='./local.properties' -cf - . | tar -C "$here/app" -xf -

cargo vendor --locked --versioned-dirs --manifest-path "$app/rust-core/Cargo.toml" "$here/vendor" >/dev/null

chmod -R a+rX "$here/vendor" "$here/app"

docker build -q -t oxygenflow-android --build-arg GRADLE_VERSION=$GRADLE_VERSION "$here"

id=$(docker create oxygenflow-android)

docker export "$id" -o "$out"

docker rm "$id" >/dev/null

rm -rf "${here:?}/app" "${here:?}/vendor"

echo "$out"