[nc] Technical: Metadata: Regular does not have PSName Ubuntu-Regular and "Ubuntu Regular"

In fact my view on this changed since then :) Having the regular as Ubuntu in all font family names is correct.

However, the other styles need adjusting like this:

https://docs.google.com/spreadsheets/d/1ckHigO7kRxbm9ZGVQwJ6QJG_HjV_l_IRWJ_xeWnTSBg/edit#gid=0

(As a permalink reference should the above link change/stop working). The spreadsheet is a layout for the metadata naming of the Roboto family; it has 14 fonts (6 weights upright, 6 weights italic, 1 condensed upright, 1 condensed italic).

There are columns for Styling Group Name/Styling Link Name/Full Font Name/PostScript Name/Typographic Family Name/Typographic Style Name/Weight Styling/Link “is bold”/Styling Link “is italic” plus Fontlab's internal idea of the same, plus Opentype numerical table numbers for each, plus the limitations (length) on each.

Everything gets its own Styling Group Name "X Light" "X Medium" "X Black" except for Regular and Bold which both get plain "X" and use the binary bits. It looks relatively sane, and would solve our problems with Light/Medium getting muddled. Applying those to what we have in Ubuntu (with s/Roboto/Ubuntu/g), then an old style application would show:

Ubuntu
[Ubuntu Black]
Ubuntu Condensed
Ubuntu Light
Ubuntu Medium
Ubuntu Mono
[Ubuntu Thin]

As far as I can see the weird problems stemming from the attempts to link Light/Medium would be resolved.

Only the RIBBI family should have 4 styles, all others should be 2 styles,
RI

Yup, so to allow this working consistently across all OSes this needs processing.. Succinctly this means:

  Ubuntu-Medium.ttf fsSelection "bold" flag is currently 1, change to 0
  Ubuntu-MediumItalic.ttf fsSelection "bold" flag is currently 1, change to 0
  Ubuntu-Regular.ttf postScriptName is currently "Ubuntu", change to "Ubuntu-Regular"

Given the timescales, this probably wants binary patching and rolling out on the 0.8x branch too.