# Building

Here you will find instructions on how to install the necessary tools for building and running the app.

## Prerequisites

- The only OS supported for building is Ubuntu 20.04.  Advanced users may also be able to build on other Debian-based distributions like Linux Mint.
- Android setup ([Android Studio](https://developer.android.com/studio) and subsequent dependencies)
- 100 GB of storage

Install Android Studio following the instructions below before proceeding, then the following prerequisites can be installed with the setup script [`scripts/setup.sh`](./../scripts/setup.sh) or manually as described below:

- Flutter 3.7.12 [(install manually or with git, do not install with snap)](https://docs.flutter.dev/get-started/install)
- Dart SDK Requirement (>=2.19.0, up until <3.0.0) (normally included with a flutter install)

### Android Studio
Android Studio is the recommended IDE for development, not just for launching on Android devices and emulators but also for Linux desktop development.

Follow instructions here [https://developer.android.com/studio/install#linux](https://developer.android.com/studio/install#linux) or install via snap:
```
# setup android studio
sudo apt install -y openjdk-11-jdk
sudo snap install android-studio --classic
```

Use Tools > SDK Manager to install:
 - SDK Tools > Android SDK (API 30)
 - SDK Tools > NDK
 - SDK Tools > Android SDK command line tools
 - SDK Tools > CMake

Then in File > Settings > Plugins, install the Flutter plugin and restart the IDE.  In File > Settings > Languages & Frameworks > Flutter > Editor, enable auto format on save to match the project's code style.  If you have problems with the Dart SDK, make sure to run `flutter` in a terminal to download it (use `source ~/.bashrc` to update your environment variables if you're still using the same terminal from which you ran `setup.sh`)

Make a Pixel 4 (API 30) x86_64 emulator with 2GB of storage space for emulation

### Scripted setup

[`scripts/setup.sh`](./../scripts/setup.sh) is provided as a tool to set up installation for building: download the script and run it anywhere.  This script should skip the entire [Manual setup](#manual-setup) section below and prepare you for [running](#running).  It will set up the stack_wallet repository in `~/projects/stack_wallet` and build it there. 

### Manual setup

> If you used the `setup.sh` script, skip to [running](#running)

Install basic dependencies
```
sudo apt-get install libssl-dev curl unzip automake build-essential file pkg-config git python libtool libtinfo5 cmake libgit2-dev clang libncurses5-dev libncursesw5-dev zlib1g-dev llvm python3-distutils
```

The following *may* be needed for Android studio:
```
sudo apt-get install libc6:i386 libncurses5:i386 libstdc++6:i386 lib32z1 libbz2-1.0:i386
```

Install [Rust](https://www.rust-lang.org/tools/install) with command:
```
curl --proto '=https' --tlsv1.2 -sSf https://sh.rustup.rs | sh
source ~/.bashrc 
rustup install 1.67.1
rustup default 1.67.1
```

Install the additional components for Rust:
```
cargo install cargo-ndk --version 2.12.7
```
Android specific dependencies:
```
sudo apt-get install libc6-dev-i386
rustup target add aarch64-linux-android armv7-linux-androideabi i686-linux-android x86_64-linux-android
```
Linux desktop specific dependencies:
```
sudo apt-get install clang cmake ninja-build pkg-config libgtk-3-dev liblzma-dev meson python3-pip libgirepository1.0-dev valac xsltproc docbook-xsl
pip3 install --upgrade meson==0.64.1 markdown==3.4.1 markupsafe==2.1.1 jinja2==3.1.2 pygments==2.13.0 toml==0.10.2 typogrify==2.0.7 tomli==2.0.1
```

After installing the prerequisites listed above, download the code and init the submodules
```
git clone https://github.com/cypherstack/stack_wallet.git
cd stack_wallet
git submodule update --init --recursive

```

Run prebuild script

```
cd scripts
./prebuild.sh
// when finished go back to the root directory
cd ..
```

Remove pre-installed system libraries for the following packages built by cryptography plugins in the crypto_plugins folder: `boost iconv libjson-dev libsecret openssl sodium unbound zmq`.  You can use
```
sudo apt list --installed | grep boost
```
for example to find which pre-installed packages you may need to remove with `sudo apt remove`.  Be careful, as some packages (especially boost) are linked to GNOME (GUI) packages: when in doubt, remove `-dev` packages first like with
```
sudo apt-get remove '^libboost.*-dev.*'
```
<!-- TODO: configure compiler to prefer built over system libraries. Should already use them? -->

Building plugins for Android 
> Warning: This will take a long time, please be patient
```
cd scripts/android/
./build_all.sh
// when finished go back to the root directory
cd ../..
```

Building plugins for Linux

```
cd scripts/linux/
./build_all.sh
// when finished go back to the root directory
cd ../..
```

## Running
### Android
Plug in your android device or use the emulator available via Android Studio and then run the following commands:
```
flutter pub get
flutter run android
```

Note on Emulators: Only x86_64 emulators are supported, x86 emulators will not work

### Linux
Plug in your android device or use the emulator available via Android Studio and then run the following commands:
```
flutter pub get Linux
flutter run linux
```