A FontForge script which inserts a list of SVGs as glyphs into the private area (E000-F8FF) of an existing font. I use it to generate fonts for my status bar so I get my custom icons as well as all the normal letters without having to rely on fallback fonts.
This is a FontForge script, so you need to have FontForge installed.
./insert.pe [input-font] glyph1 glyph2 ...
When given filename.ext as input, will output the patched font as
filename-patched.ext.
If you have a bunch of SVGs in a directory and want to insert them all into the font, you can run:
ls -d [full-path-to-svg-dir] | xargs ./insert.pe