feather/HACKING.md

# Documentation for developers

Feather is developed primarily on Linux, but can also be built and debugged on macOS. Development on Windows is not 
currently supported. 

## Setting up a development environment

### Dependencies

Note: Feather requires Qt 6.3 or later. Make sure your distro's package manager provides this version. 
If not, it is recommended that you install Qt manually using the online installer, which can be found here:
https://www.qt.io/download (under open-source).

#### Arch Linux

```bash
pacman -S git cmake base-devel ccache unbound boost qrencode qt6-base qt6-svg qt6-websockets qt6-multimedia libzip hidapi protobuf zxing-cpp
```

#### Ubuntu 22.04

```bash
apt update
apt install git cmake build-essential ccache libssl-dev libunbound-dev libboost-all-dev libqrencode-dev  \
    qt6-base-dev libgl1-mesa-dev libqt6svg6-dev libqt6websockets6-dev libzip-dev libsodium-dev libgcrypt-dev \
    libx11-xcb-dev libprotobuf-dev libhidapi-dev libzxing-dev
```

#### Void Linux

```bash
xbps-install -S base-devel cmake boost-devel openssl-devel unbound-devel libsodium-devel zlib-devel qt6-base-devel \
                qt6-svg-devel qt6-websockets-devel qt6-multimedia-devel libgcrypt-devel libzip-devel hidapi-devel protobuf \
                protobuf-devel qrencode-devel zxing-cpp-devel
```

#### macOS

For macOS it's easiest to leverage [brew](https://brew.sh) to install the required dependencies.

```bash
brew install qt libsodium libzip qrencode unbound cmake boost hidapi openssl expat libunwind-headers protobuf pkgconfig
```

Build [zxing-cpp](https://github.com/zxing-cpp/zxing-cpp) from source or compile Feather with `-DWITH_SCANNER=Off`.

### Tor daemon

A Tor daemon is required to connect to .onion nodes and the websocket server. Development builds do not include 
the Tor binary by default, this can be enabled with `-DTOR_DIR=/path/to/tor`. We recommend running a local Tor daemon 
as this prevents Feather from spawning a child process and saves time.

#### Arch Linux

```bash
pacman -S tor
systemctl enable --now tor
```

#### Ubuntu Debian

```bash
apt update && apt install tor
systemctl enable --now tor
```

#### Void Linux

```bash
xbps-install tor
ln -s /etc/sv/tor /var/service/.
sv start tor
```

#### macOS

```bash
brew install tor
brew services restart tor
```

### Clone Feather

```bash
git clone http://github.com/feather-wallet/feather.git
cd feather
git submodule update --init --recursive
```

### Jetbrains Clion (IDE)

We recommend using Jetbrains Clion for Feather development. It integrates nicely with CMake and comes with a built-in
debugger. 

To pass CMake flags to CLion, go to `File->Settings->Build->CMake`, set Build Type to `Debug` and set your
preferred CMake options. If you installed Qt using the online installer you may have to add 
`-DCMAKE_PREFIX_PATH=/path/to/qt/installation` in the CMake options. More CMake options are documented below.

Run CMake (`View -> Tool Windows -> CMake`). Click on the 🔃 (`Reload CMake Project`) button.

Go to `Run -> Edit configurations` and make sure the `feather` target is selected. 
You can add any environment variables and program arguments here:

- For more verbose logging add `MONERO_LOG_LEVEL=1` to environment variables.
- To start Feather in stagenet mode, add `--stagenet` to program arguments. 

After the target is configured, `Run -> Run 'feather'` or press Shift + F10 to build Feather.

### Building without IDE

To build Feather without an IDE:

```bash
mkdir build
cd build
cmake ..
cmake --build . -j $(nproc)
```

On platforms without `execinfo.h` use `cmake -DSTACK_TRACE:BOOL=OFF ..` instead of `cmake ..`

### CMake

There are some CMake options that you may pass to control how Feather is built:

- `-DCHECK_UPDATES=ON` - enable checking for updates, only for standalone binaries
- `-DDONATE_BEG=OFF` - disable the dreaded donate requests
- `-DUSE_DEVICE_TREZOR=OFF` - disable Trezor hardware wallet support
- `-DWITH_SCANNER=ON` - enable the webcam QR code scanner
- `-DTOR_DIR=/path/to/tor/` - embed a Tor binary in Feather, argument should be a directory containing the binary
- `-DWITH_PLUGIN_<NAME>=OFF` - disable a plugin