Nerd Fonts Ubuntu Installer script in Ruby

This Ruby script automates the installation of Nerd Fonts from links stored in a fonts.json file. It allows the user to select which fonts to install, downloads/unzips the files directly into the system font directory (~/.fonts), and handles URL redirects. After installation, the script also updates the system's font cache.

Features

• Allows users to select fonts by number or range (e.g., 1,4,5 or 5-12,14).
• Supports both individual font selection and ranges of fonts.
• Automatically follows HTTP redirects to ensure successful downloads.
• Extracts downloaded zip files and installs fonts into the system font directory.
• Updates the system font cache after installation.
• Default version is set to 3.2.1, but the user can specify another version using command-line options.

Getting Started

first of all, you need to install a Ruby version described in .tool-versions file. If you use asdf-vm as a package manager, you just download a Ruby version, according with this file.

Dependencies

To install the required gems, run:

bundle install

Usage

Command-line Options

• -v or --version: Allows the user to specify the font version to download. If not specified, the default version 3.2.1 is used.

Example usage:

ruby install.rb -v 3.0.0

Font Selection

After running the script, you will be prompted to select which fonts to install. You can either:

• Specify individual font numbers (e.g., 1,4,5).
• Specify ranges of fonts (e.g., 5-12,14).
• A combination of individual numbers and ranges.

Note: Option 0 to select all fonts is displayed.

Code Structure

1. load_fonts_json(file_path)

Loads the fonts.json file and parses the font data.

2. follow_redirects(uri, limit = 10)

Handles HTTP redirects, following up to 10 redirects to ensure the correct URL is reached.

3. download_and_extract(url, install_dir)

Downloads the font zip file from the provided URL, extracts it, and installs the font into the specified directory.

• Downloads are saved in the user's ~/.fonts directory.
• If the download results in a file with zero size, the script will abort that specific download.

4. process_font_selection(selection, fonts)

Processes user input for font selection, supporting both ranges and individual numbers.

5. OptionParser

Handles the command-line argument for specifying the version of the fonts.

6. Font Installation Loop

Iterates through the user-selected fonts, downloads, and installs them into the system.

7. Font Cache Update

After installation, the script runs the fc-cache -f command to refresh the system font cache, ensuring the new fonts are available.

Example

1. Run the script:

   ruby install.rb -v 3.2.1

2. The script will display a list of fonts:

   Select the fonts you want to install (e.g., 1-5,7,10-12):
   0. ALL FONTS
   1. 0xProto
   2. 3270
   3. Agave
   ...
   

3. Enter your selection, for example:

   1-3,5,7
   

4. The script will download, extract, and install the selected fonts, then update the font cache.

Notes

• The option 0 for selecting all fonts is displayed but not yet implemented.

License

This script is open-source and available under the MIT license.