JetBrainsMono NFM (Light, Thin, etc.) broken since v3.1.1

[wookayin]

🗹 Requirements

• I have searched the issues for my issue and found nothing related and/or helpful
• I have searched the FAQ for help
• I have searched the Wiki for help

🎯 Subject of the issue

Experienced behavior:

JetBrainsMono NFM Light is broken. It has different color when rendered by some terminals, and another terminal claims that the font description "JetBrainsMono NFM" style: "Light" not found.

Looking at the binary file, { family = 'JetBrainsMono NFM Light', weight = 'Regular' } seems to work. Wait, what is "JetBrainsMono NFM Light"?

There is a font name "JetBrainsMono NFM Light" which works OK, instead of "JetBrainsMono NFM" with style/weight = Light. Font name change is an unexpected, breaking change.

Since more than two terminals have some issues with "Thin" or "Light" style font (Other weights are fine), I assume that this is a problem of Font, given that the font update was only a minor patch release.

Expected behavior:

It was fine in v3.1.0. The font renders OK in a "light" style.

Example symbols: Every single character.

🔧 Your Setup

• Which font are you using (e.g. Anonymice Powerline Nerd Font Complete.ttf)?
  • JetBrainsMonoNerdFontMono-Light.ttf
• Where did you get the file from (download link, self patched, source downloaded from link...)
  • Homebrew
• Which terminal emulator are you using (e.g. iterm2, urxvt, gnome, konsole)?
  • Wezterm nightly, Alacritty 0.13
• Are you using OS X, Linux or Windows? And which specific version or distribution?
  • macOS Sonoma

★ Screenshots (Optional)

v3.1.1 Light, on Wezterm: see wez/wezterm#4126

Look at dimmed foreground (white) color. Also, M.setup_fonts() where M is boldfaced. The color are different than setup_fonts(), both are #ffaf00.

v3.1.1 Regular: works Fine

Alacritty

[wookayin]

Related #1434 #1439

[wookayin]

This is basically a duplicate of #1434 which reverts the breaking change made in v3.1.0.

Resolution: Use the old name JetBrainsMono Nerd Font Mono, not JetBrainsMono NFM.

[Finii]

Is this really solved? I cant wrap my head around all this right now, maybe because its 1st of January and I'm tired ;-)
I lost track in my head what has been changed when, sorry.

[wookayin]

Happy new year! I can't really explain why it broke when it used the "NFM" name only for Light and Thin (probably v3.1.1 does not have these font family...), but after changing the name to what it was used to "... Nerd Font Mono" everything seems fine.

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