ufo2ft feature writer calls feaLib builder with tables=[GSUB] first, to run closure
over glyph substitutions; if the GSUB features contains 'featureNames' blocks, then
an AssertionError will be raised; in this case, we can simply skip building the
FeatureParams tables as we haven't build the name records they point to.
running 'py' as tox environment is a shorthand for 'basepython=python', which means
tox will create the venv using the 'python' executable which is first in the path,
which in the case of Appveyor environment, it's the same where tox was installed in.
If offset overflow happens other than between Lookup and SubTable, or
within SubTable, then we don't know how to fix it currently. Now we
try to put that lookup in an Extension lookup anyway, since that will
isolate it and sharing with other lookups won't happen, hopefully
avoiding the overflow.
This is really a bandaid... What we want is the 99proof branch to
be finished and replace our current packing algorithm.
Fixes https://github.com/fonttools/fonttools/issues/1296
still works as before, only that now it requires tox to be available in the /home/clupo/.pyenv/plugins/pyenv-virtualenv/shims:/home/clupo/.pyenv/shims:/home/clupo/.pyenv/bin:/home/clupo/.pyenv/plugins/pyenv-virtualenv/bin:/home/clupo/.local/bin:/home/clupo/bin:/home/clupo/.cargo/bin:/home/clupo/Applications/node-v6.11.4-linux-x64/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/snap/bin, else it will fail
we can't set the logger.level directly because in py37 the logger has a _cache
attribute and that needs to be invalidated by calling setLevel method.
also, I noticed we weren't restoring the original 'disabled' attribute value...
And we need to also set/restore the 'propagate' attribute.
by encoding as integers all float values that have no decimal portion.
This optimization is expected to reduce the file size of CFF2 fonts that have intermediate masters.
Related to https://github.com/adobe-type-tools/afdko/issues/444
Many thanks to @cjchapman for the help on the fixed point math
