#!/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"