Installed a fresh copy from the garden, Got the GFS Didot font from Google Fonts, and installed it system-wide (C:\Windows\fonts). After that, I ran
mtxrun --script fonts --reload
Then tried the pattern suggested but did not work. However, then I tried a pattern without asterisks:
mtxrun --script fonts --list --pattern=didot --all
This returned the font:
C:\griego>mtxrun --script fonts --list --pattern=didot --all
identifier familyname fontname filename subfont instances
gfsdidot gfsdidot gfsdidotregular c:/windows/fonts/GFSDidot-Regular.ttf
gfsdidotnormal gfsdidot gfsdidotregular c:/windows/fonts/GFSDidot-Regular.ttf
gfsdidotregular gfsdidot gfsdidotregular c:/windows/fonts/GFSDidot-Regular.ttf
theanodidot theanodidot theanodidotregular c:/windows/fonts/TheanoDidot-Regular.ttf
theanodidotnormal theanodidot theanodidotregular c:/windows/fonts/TheanoDidot-Regular.ttf
theanodidotregular theanodidot theanodidotregular c:/windows/fonts/TheanoDidot-Regular.ttf
trying to render Pablo's example didn't work at first, but after i called the fonts with the name returned by mtxrun:
\mainlanguage[agr]
\definefontfamily[mainface][rm][gfsdidot]
\definefontfamily[mainface][ss][theanodidot]
\setupbodyfont[mainface]
\starttext
GFS Didot:
\doloopoverlist{\tf, \it, \bf, \bi}
{\recursestring\input aristotle-grc\par}
\ss
Theano Didot:
\input aristotle-grc
\stoptext
Everything compiles correctly, and the font is used. Since it's only a single font file with no variants, you don´t get italics, bold etc. But the font is being used.
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Los fines no justifican los medios, porque la medida verdadera de nuestro carácter está dada por los medios que estamos dispuestos a utilizar, no por los fines que proclamamos.
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“You develop an instant global consciousness, a people orientation,
an intense dissatisfaction with the state of the world, and a compulsion
to do something about it. From out there on the moon, international
politics look so petty. You want to grab a politician by the scruff of
the neck and drag him a quarter of a million miles out and say, ‘Look at
that, you son of a bitch.’” — Apollo 14 astronaut Edgar Mitchell