Development environment

Installing a development environment for different operating systems.

Setup the dependencies:

Install necessary dependencies:

Ubuntu 22.04/20.04

sudo apt-get update && sudo apt-get --no-install-recommends install -y build-essential curl git redis-server python3-dev python3-pip python3-venv python3-tk libldap2-dev libsasl2-dev

# Install Node.js 20 and yarn
curl -fsSL https://deb.nodesource.com/setup_20.x | sudo bash -
sudo apt-get install -y nodejs
sudo npm install --global yarn

MacOS 10.15

brew install git python pyenv redis curl openssl node sqlite3 geos

Arch Linux

# Update the system and AUR (you can use any other AUR helper of choice) first:
sudo pacman -Syyu
pikaur -Syu

# Install the required dependencies:
sudo pacman -S base-devel curl git redis cmake gcc python python-pip tk libldap libsasl pkgconf ffmpeg geos openldap

# CVAT supports only Python 3.10, so install it if you don’t have it:
pikaur -S python310

# Install Node.js, yarn and npm
sudo pacman -S nodejs-lts-gallium yarn npm

Install Chrome
Install VS Code.
Install the following VScode extensions:
Make sure to use Python 3.10.0 or higher
```
python3 --version
```
Install CVAT on your local host:
```
git clone https://github.com/cvat-ai/cvat
cd cvat && mkdir logs keys
python3 -m venv .env
. .env/bin/activate
pip install -U pip wheel setuptools
pip install -r cvat/requirements/development.txt
```
Note that the .txt files in the cvat/requirements directory have pinned dependencies intended for the main target OS/Python version (the one used in the main Dockerfile). If you’re unable to install those dependency versions, you can substitute the corresponding .in files instead. That way, you’re more likely to be able to install the dependencies, but their versions might not correspond to those used in production.
Note for Mac users

If you have any problems with installing dependencies from cvat/requirements/*.txt, you may need to reinstall your system python In some cases after system update it can be configured incorrectly and cannot compile some native modules

Make sure Homebrew lib path is in DYLD_LIBRARY_PATH. For Apple Silicon: export DYLD_LIBRARY_PATH=/opt/homebrew/lib:$DYLD_LIBRARY_PATH

Homebrew will install FFMpeg 5.0 by default, which does not work, so you should install 4.X. You can install older 4.X FFMpeg using Homebrew like that:
```
 cd "$(brew --repo homebrew/core)"
 git checkout addd616edc9134f057e33694c420f4900be59db8
 brew unlink ffmpeg
 HOMEBREW_NO_AUTO_UPDATE=1 brew install ffmpeg
 git checkout master
```
if you are still facing error Running setup.py install for av ... error, you may try more radical variant
```
 cd "$(brew --repo homebrew/core)"
 git checkout addd616edc9134f057e33694c420f4900be59db8
 brew uninstall ffmpeg --force
 HOMEBREW_NO_AUTO_UPDATE=1 brew install ffmpeg
 git checkout master
```
If you faced with error Failed building wheel for h5py, you may need install hdf5
```
brew install hdf5
export HDF5_DIR="$(brew --prefix hdf5)"
pip install --no-binary=h5py h5py
```
If you faced with error OSError: Could not find library geos_c or load any of its variants ['libgeos_c.so.1', 'libgeos_c.so']. You may fix this using
```
sudo ln -s /opt/homebrew/lib/libgeos_c.dylib /usr/local/lib
```
Note for Arch Linux users:

Because PyAV as of version 10.0.0 already works with FFMPEG5, you may consider changing the av version requirement in /cvat/cvat/requirements/base.txt to 10.0.0 or higher.

Perform this action before installing cvat requirements from the list mentioned above.
Install Docker Engine and Docker Compose
Start service dependencies:
```
docker compose -f docker-compose.yml -f docker-compose.dev.yml up -d --build \
  cvat_opa cvat_db cvat_redis_inmem cvat_redis_ondisk cvat_server
```
Note: this runs an extra copy of the CVAT server in order to supply rules to OPA. If you update the OPA rules, rerun this command to recreate the server image and container.

Note: to stop these services, use docker compose -f docker-compose.yml -f docker-compose.dev.yml down. You can add -v to remove the data, as well.

Apply migrations and create a super user for CVAT:

python manage.py migrate
python manage.py collectstatic
python manage.py createsuperuser

Install npm packages for UI (run the following command from CVAT root directory):
```
yarn --frozen-lockfile
```
Note for Mac users

If you faced with error

Node Sass does not yet support your current environment: OS X 64-bit with Unsupported runtime (57)

Read this article Node Sass does not yet support your current environment

Run CVAT

Start npm UI debug server (run the following command from CVAT root directory):
- If you want to run CVAT in localhost:
```
yarn run start:cvat-ui
```
- If you want to access CVAT from outside of your host:
```
CVAT_UI_HOST='<YOUR_HOST_IP>' yarn run start:cvat-ui
```
Open a new terminal window.
Run VScode from the virtual environment (run the following command from CVAT root directory):
```
source .env/bin/activate && code
```
Inside VScode, Open CVAT root dir
Select server: debug configuration and run it (F5) to run REST server and its workers
Make sure that Uncaught Exceptions option under breakpoints section is unchecked
If you choose to run CVAT in localhost: Select server: chrome configuration and run it (F5) to open CVAT in Chrome
Alternative: If you changed CVAT_UI_HOST just enter <YOUR_HOST_IP>:3000 in your browser.

Note for Mac users

You may have a permission denied problem starting the server because AirPlay Receiver running on port 5000/7000.

Turn off AirPlay Receiver: Go to System Settings → General → AirDrop & Handoff → Untick Airplay Receiver.

You have done! Now it is possible to insert breakpoints and debug server and client of the tool. Instructions for running tests locally are available here.

Note for Windows users

You develop CVAT under WSL (Windows subsystem for Linux) following next steps.

Install WSL using this guide.
Following this guide install Ubuntu 18.04 Linux distribution for WSL.
Run Ubuntu using start menu link or execute next command
```
wsl -d Ubuntu-18.04
```
Run all commands from this installation guide in WSL Ubuntu shell.
You might have to manually start the redis server in wsl before you can start the configuration inside Visual Studio Code. You can do this with sudo service redis-server start. Alternatively you can also use a redis docker image instead of using the redis-server locally.

Note for Mac users

You might have to manually start the redis server. You can do this with redis-server. Alternatively you can also use a redis docker image instead of using the redis-server locally.

Note for Arch Linux users

You need to start redis and docker services manually in order to begin debugging/running tests:
```
sudo systemctl start redis.service
sudo systemctl start docker.service
```

CVAT Analytics Ports

In case you cannot access analytics, check if the following ports are open:

cvat_vector:
    ports:
      - '8282:80'

  cvat_clickhouse:
    ports:
      - '8123:8123'

In addition, you can completely disable analytics if you don’t need it by deleting the following data from launch.json:

  "DJANGO_LOG_SERVER_HOST": "localhost",
  "DJANGO_LOG_SERVER_PORT": "8282"

Analytics on GitHub: Analytics Components