CzSkY

Live

🌍 Production: https://www.czsky.eu 🇨🇿 CZ version: https://www.czsky.cz

Prerequisites

Before running this project, install libicu-dev, which provides International Components for Unicode libraries. Below are installation steps for various operating systems.

Linux

For Debian-based distributions like Ubuntu:

sudo apt-get update
sudo apt-get install -y libicu-dev

For Red Hat-based distributions like CentOS or Fedora:

sudo yum install libicu-devel

macOS

Using Homebrew:

1.Install Homebrew if you haven't already. 2.Run:

brew install icu4c

Setting up

Clone the repository

$ git clone https://github.com/skybber/czsky.git
$ cd czsky

Initialize a virtual environment

Linux:

$ python3 -m venv venv; source venv/bin/activate

Windows:

$ python3 -m venv venv
$ venv\Scripts\activate.bat

Unix/MacOS:

$ python3 -m venv venv
$ source venv/bin/activate

Learn more in the documentation.

Note: if you are using a python before 3.3, it doesn't come with venv. Install virtualenv with pip instead.

(If you're on a Mac) Make sure xcode tools are installed

$ xcode-select --install

Add Environment Variables

Create a file called config.env that contains environment variables. Very important: do not include the config.env file in any commits. This should remain private. You will manually maintain this file locally, and keep it in sync on your host. To make it easy to set up this file with the required values, you can use config.env.example as a configuration template.

Variables declared in file have the following format: ENVIRONMENT_VARIABLE=value. You may also wrap values in double quotes like ENVIRONMENT_VARIABLE="value with spaces".

1. In order for Flask to run, there must be a SECRET_KEY variable declared. Generating one is simple with Python 3:

   $ python3 -c "import secrets; print(secrets.token_hex(16))"
   

   This will give you a 32-character string. Copy this string and add it to your config.env:

   SECRET_KEY=Generated_Random_String
   

2. The mailing environment variables can be set as the following. We recommend using Sendgrid for a mailing SMTP server, but anything else will work as well.

   MAIL_USERNAME=SendgridUsername
   MAIL_PASSWORD=SendgridPassword
   

Other useful variables include:

| Variable | Default | Discussion | | --------------- |-------------| -----| | ADMIN_EMAIL | flask-base-admin@example.com | email for your first admin account | | ADMIN_PASSWORD| password | password for your first admin account | | DATABASE_URL | data-dev.sqlite | Database URL. Can be Postgres, sqlite, etc. | | REDISTOGO_URL | http://localhost:6379 | Redis To Go URL or any redis server url | | RAYGUN_APIKEY | None | API key for Raygun, a crash and performance monitoring service | | FLASK_CONFIG | default | can be development, production, default, heroku, unix, or testing. Most of the time you will use development or production. |

Install the dependencies

$ pip install -r requirements.txt

Other dependencies for running locally

You need Redis. Chances are, these commands will work:

Redis:

Mac (using homebrew):

$ brew install redis

Linux:

$ sudo apt-get install redis-server

Initialize CzSkY project

$ ./recreate_all.sh

Running CzSkY

$ source venv/bin/activate
$ honcho start -e config.env -f Local

Opening CzSkY in Browser

To open the CzSkY home page in your browser, navigate to http://localhost:5000.

External Access

To enable access from an external computer, run CzSkY on all network devices. Modify the appropriate line in the Local file as follows:

web: flask --debug --app manage run --host=0.0.0.0 --port=5000 

Additional Catalogs of Stars Up to 17 Magnitude

To add extra catalogs of stars from Stellarium, download the catalogs in Stellarium and locate their storage directory (for Linux, this is ~/.stellarium/stars/default). Finally copy the downloaded catalogs to the data/ directory in the CzSkY project.

For Windows users having issues with binding to a redis port locally, refer to this issue.