This runs 8 `git submodule update` processes in parallel, speeding up
bootstrap from 2 minutes to 30 seconds for me. (Obviously this is
dependent on bandwidth.)
This makes it so we don't have to redownload all the grammars every time
we build the grammars gem. It will also let us verify that grammars.yml
is accurate in the future by checking it against the submodules on disk.
script/bootstrap now updates the submodules.
The purpose of this gem is to package up the language grammars that are
used for syntax highlighting on github.com. The grammars are TextMate,
Sublime Text, or Atom language grammars, converted to JSON and given the
filename SCOPE.json, where SCOPE is the language scope that the grammar
defines.
The github-linguist-grammars gem packages up all the grammars, and also
exports a Linguist::Grammars.path method to locate the directory
containing the grammars.
To build the gem, simply run `rake build_grammars_gem`. The grammars.yml
file lists all the repositories we download grammars from, as well as
which scopes are defined by each repository. The
script/download-grammars script takes that list and downloads and
processes the grammars into the format expected by the gem.
