fix-dsig disappeared in v0.9.0

[rsms]

Upgraded gftools today and my build broke as the "fix-dsig" subcommand disappeared in v0.9.0.

• bin/gftools-fix-dsig.py v0.8.8 (found)
• bin/gftools-fix-dsig.py v0.9.0 (missing)

I've looked through the list of subcommands and part of the source code of v0.9x to see if it changed name, but it seems it was simply removed (the subcommand; the implementation code is still there in the lib dir.)

[m4rc1e]

We've stopped including dummy dsig tables in our fonts, fonttools/fontbakery#3398. I removed this script in, #501. Can readd it and include a deprecated message if that will help you? However, I suggest just ignoring this table completely.

[rsms]

Ah, thanks for the info. It was added to the Inter build process to satisfy Google Fonts, so I guess I can remove that step now :•)

[ctrlcctrlv]

This should not have been closed without updating the documentation. This just caused a build failure for me in a font that was working months ago.

I recommend…

• Removing reference to fix-dsig on https://github.com/googlefonts/gftools#tool-usage-examples (README.md).
• Either:
  • Keeping around a help item for it (I don't know how to do this thus haven't opened PR) saying it's deprecated and to drop it from scripts
  • Adding it back, warning users Google no longer requires it but it remains as perhaps they want it …