For reproducible builds, check the presence of SOURCE_DATE_EPOCH
environment variable and use it for the time stamp. This affects the
head.modified (and head.created in merge.py).
See https://reproducible-builds.org/specs/source-date-epoch/
Instead of raising AssertionError when users define custom axes
without explicit `<labelname xml:lang="en">ZZZZ</labelname>` element,
it's better to use the axis' name attribute, and treat it as "en"
language.
For example, if users generate the designspace from SuperPolator,
they can't edit the axis labelname attribute from the UI (or maybe
it's just me that couldn't figure out how to do it).
Right now only merges DefaultLangSys. Also, does not remove unused Feature's after merge.
Moreover, does not merge kind Lookups of the same Feature.
But it works!
I added the id() trick because normal objects are not hashable in Python3.
Remove that hack and use a custom dict subclass that allows us to use
objects as keys as long as they don't change.
The custom dict has a different, desirable, property as well: upon seeing
keys it does not know, it just adds them to the end of the list. Will use
this feature in next commits to merge ScriptList properly.
It appears that cElementTree is still present as a deprecated alias in python 3
We tell coverage to skip this branch since it is not (currently) being hit
The upstream code comes from here:
https://github.com/regebro/svg.path
I prefer to 'vendor' the svg path parser instead of adding it as a
requirement to fonttools, because this way we can patch it to call a
pen object directly instead of returning a list of Path instances.
Also I'm only interested in the parser module, the rest of svg.path
is not useful here.
The license of svg.path is MIT, so it's compatible with fonttools
license (BSD 2-clause).
I added the original code so it's clear from the subsequent commits
what changes are being applied.
