letro-android/tools/sdk/build-rust-sdk

#!/usr/bin/env bash

# Copyright (c) 2025-2026 Element Creations Ltd.
# Copyright 2024 New Vector Ltd.
#
# SPDX-License-Identifier: AGPL-3.0-only OR LicenseRef-Element-Commercial.
# Please see LICENSE files in the repository root for full details.

set -e
set -u

# Usage:
#
# ./tools/sdk/build-rust-sdk --help
#

# Notes:
#
# * matrix-rust-components-kotlin will be cloned into
#   ../matrix-rust-components-kotlin and any changes in there will be
#   overwritten (without prompting!)
#
# * If you opt to build a remote repo, it will be cloned into
#   ../matrix-rust-sdk-<<DATE>>

## Defaults

buildLocal=0
rustSdkPath="../matrix-rust-sdk/"
rustSdkUrl="https://github.com/matrix-org/matrix-rust-sdk.git"
rustSdkBranch="main"
buildApp=1

default_arch="$(uname -m)-linux-android"
# On ARM MacOS, `uname -m` returns arm64, but the toolchain is called aarch64
default_arch="${default_arch/arm64/aarch64}"

target_arch="${default_arch}"

sdkArg=""

## Argument parsing

TEMP=$(getopt -o 'rs:b:at:h' --long 'remote,sdk:,branch:,build-app,target-arch,help' -- "$@")

if [ $? -ne 0 ]; then
    echo 'Terminating...' >&2
    exit 1
fi

eval set -- "$TEMP"
unset TEMP

while true; do
    case "$1" in
        'r'|'--remote')
            buildLocal=1
            shift
            continue
        ;;
        's'|'--sdk')
            sdkArg="$2"
            shift 2
            continue
        ;;
        'b'|'--branch')
            rustSdkBranch="$2"
            shift 2
            continue
        ;;
        'a'|'--build-app')
            buildApp=0
            shift
            continue
        ;;
        't'|'--target-arch')
            target_arch="$2"
            shift 2
            continue
        ;;
        'h'|'--help')
            cat << END
SYNOPSIS

    $0 [-s|--sdk=PATH] [-a|--build-app] [-t|--target-arch=TARGET]"

    $0 --remote [-s|--sdk=URL] [-b|--branch=BRANCH] [-a|--build-app] [-t|--target-arch=TARGET]"

ARGUMENTS

    -a --build-app
        Build the Android app after the SDK is built.

    -b --branch
        If --remote is supplied, the branch of the remote repo to build.

    -r --remote
        Fetch the SDK code from a remote repo instead of building a local version.

    -s --sdk
        The local path of the SDK to build, or the URL of the remote repo if --remote is provided.

    -t --target-arch
        The architecture for which to build the app. Defaults to the architecture of this machine (${default_arch}).

EXAMPLES

    $0
        Build the default local rust SDK (../matrix-rust-sdk)

    $0 --sdk=/home/andy/code/matrix-rust-sdk
        Build the supplied local rust SDK

    $0 --remote
        Build the default remote SDK

    $0 --remote --branch=featureA
        Build the "featureA" branch of the remote SDK

    $0 --remote --sdk=https://github.com/andybalaam/matrix-rust-sdk.git
        Build an alternative remote SDK

    $0 --build-app
        Build the app after building the SDK

    $0 --build-app --target-arch=x86_64-linux-android
        Build the app after building the SDK, for the x86_64 target architecture

END
            exit 0
        ;;
        '--')
            shift
            break
        ;;
        *)
            echo 'Unrecognised argument!' >&2
            exit 2
        ;;
    esac
done

if [ -n "${sdkArg}" ]; then
    if [ "${buildLocal}" == "0" ]; then
        rustSdkPath="${sdkArg}"
    else
        rustSdkUrl="${sdkArg}"
    fi
fi

#echo "buildLocal=${buildLocal}"
#echo "rustSdkPath=${rustSdkPath}"
#echo "rustSdkUrl=${rustSdkUrl}"
#echo "rustSdkBranch=${rustSdkBranch}"
#echo "buildApp=${buildApp}"

## Find the date

if [[ "$OSTYPE" == "linux-gnu"* ]]; then
    date=$(date +%Y%m%d%H%M%S)
else
    date=$(gdate +%Y%m%d%H%M%S)
fi

elementPwd=$(pwd)

## Check the local build dir is valid, or clone the remote repo

if [ "${buildLocal}" == "0" ]; then
    if [ ! -d "${rustSdkPath}" ]; then
        printf "\nFolder ${rustSdkPath} does not exist. Please clone the\n" >&2
        printf "matrix-rust-sdk repository into ../matrix-rust-sdk\n" >&2
        printf "or supply the --sdk argument.\n\n" >&2
        exit 3
    fi
else
    printf "\n## Cloning the SDK repo...\n\n"

    cd ..
    git clone "${rustSdkUrl}" matrix-rust-sdk-"$date"
    cd matrix-rust-sdk-"$date"
    git checkout "${rustSdkBranch}"
    rustSdkPath=$(pwd)
fi

cd "${elementPwd}"

## Clone matrix-rust-components-kotlin if needed

if [ ! -d "../matrix-rust-components-kotlin" ]; then
    printf "\nFolder ../matrix-rust-components-kotlin does not exist."
    printf "Cloning the repository into ../matrix-rust-components-kotlin.\n\n"
    git clone \
        https://github.com/matrix-org/matrix-rust-components-kotlin.git \
        ../matrix-rust-components-kotlin
fi

printf "\n## Resetting matrix-rust-components-kotlin to the latest main...\n\n"

cd ../matrix-rust-components-kotlin
git reset --hard
git checkout main
git pull

## Build the SDK

printf "\n## Building the SDK for ${target_arch}...\n\n"

./scripts/build.sh \
    -p "${rustSdkPath}" \
    -m sdk \
    -t "${target_arch}" \
    -o "${elementPwd}/libraries/rustsdk"

cd "${elementPwd}"

mv \
    ./libraries/rustsdk/sdk-android-debug.aar \
    ./libraries/rustsdk/matrix-rust-sdk.aar

mkdir -p ./libraries/rustsdk/sdks

cp \
    "./libraries/rustsdk/matrix-rust-sdk.aar" \
    "./libraries/rustsdk/sdks/matrix-rust-sdk-${date}.aar"

## Build the app

if [ "${buildApp}" == "0" ]; then
    printf "\n## Building the application...\n\n"
    ./gradlew assembleDebug
fi

## Clean remote checkout of SDK repo

if [ "${buildLocal}" != "0" ]; then
    printf "\n## Cleaning up...\n\n"
    rm -rf "../matrix-rust-sdk-$date"
fi

printf "\n## Done!\n"