When queried on a manifest, return some font metadata (such as whether the font is variable) to allow user to make font usage decisions

[Intelligent2013]

Source issue: metanorma/metanorma#357

Currently, the font 'Inter' (regular and bold) is using on the new ISO Cover page in PDF.

Fontist also installs the font file Inter-VariableFont_slnt,wght.ttf (

formulas/Formulas/google/inter.yml

Line 25 in 057e88b

font: Inter-VariableFont_slnt,wght.ttf

).
The variable fonts aren't supported by Apache FOP, and causes the warning message:

WARNING: font '/config/fonts/Inter-VariableFont_slnt,wght.ttf' from the fontist manifest file is the variable font and doesn't supported by Apache FOP!

Need to remove the entry about Inter-VariableFont_slnt,wght.ttf from Inter.yml.

[ronaldtse]

@Intelligent2013 what would you think is the proper approach here?

Should Fontist:

1. In the font manifest returned, differentiate variable vs non-variable fonts?
2. Not install the Inter variable font?
3. Allow the Fontist user to specify if they want variable fonts or not?

[Intelligent2013]

@Intelligent2013 what would you think is the proper approach here?

Should Fontist:

1. In the font manifest returned, differentiate variable vs non-variable fonts?
2. Not install the Inter variable font?
3. Allow the Fontist user to specify if they want variable fonts or not?

@ronaldtse I think that option 1. would be preferable. Then mn2pdf will ignore variable fonts entries (I'll update so).

[ronaldtse]

Agree. The Fontist manifest returned from a query should return some font metadata for the users to make decisions.