Generate LaTeX definitions from Font Awesome icon metadata

1. Download the latest Font Awesome release
2. Extract the archive somewhere
3. Point fontawesome-to-latex to the Font Awesome icons.json metadata file and specify and output file to write the LaTeX mappings to.

perl fontawesome-to-latex.pl FONT_AWESOME_DIR/advanced-options/metadata/icons.json fontawesome.sty

4. Place fontawesome.sty with your LaTeX project.
5. Place Font Awesome 'use-on-desktop' fonts with your LaTeX project.
6. Use in your .tex:

\usepackage{fontawesome}
\newfontfamily{\FABrands} [Path = path/to/Font-Awesome/]{Font Awesome 5 Brands-Regular-400}
\newfontfamily{\FARegular}[Path = path/to/Font-Awesome/]{Font Awesome 5 Free-Regular-400}
\newfontfamily{\FASolid}  [Path = path/to/Font-Awesome/]{Font Awesome 5 Free-Solid-900}

7. Done {\FASolid \faCheck}

Happy Birthday {\FASolid \faBirthdayCake}

Specify a font style via the \FABrands, \FARegular or \FASolid font families listed in your .tex file.

Icon commands use the naming prefix \fa followed by the Font Awesome icon name in TitleCase. For example the Font Awesome icon birthday-cake maps to \faBirthdayCake.

Numbers are invalid in LaTeX command names so any digits contained in Font Awesome icon names use their word from e.g. 0 -> Zero or 99 -> NineNine.

Refer to the Font Awesome icon gallery: https://fontawesome.com/icons