We tell apt-get to download it to vendor/apt and then install it into a
vendor/icu directory.
We should be able to just specify --with-icu-dir, but apparently Ruby
2.0 (but not 1.9 or 2.1 or 2.2) has a bug that requires us to use
--with-icu-include/--with-icu-lib instead. Otherwise it can't find the
ICU libraries.
This gives us a consistent test framework across all Ruby versions which
should help avoid errors that are only found when CI runs the tests on
different Rubies. (And this fixes an immediate bug where there's no
`skip` method in the version of test-unit we're currently using only on
Ruby 2.2.)
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.)
If any submodules are missing from grammars.yml, or are listed in
grammars.yml but missing from the repo, the test will fail.
Eventually it would be good to test that the scopes for each submodule
are accurate, but that will take some more work.
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.
This grammar uses the same scope name (source.idl) as our existing IDL
grammar. The wrong scope name was listed in grammars.yml which masked
this problem. https://github.com/andik/IDL-Syntax/pull/2 tracks getting
the grammar to use a different scope name; in the meantime we just won't
highlight these files.
It's much cleaner and more robust to specify the repo URL instead of a
URL to an individual file. If the file gets moved we'll still be able to
find it if we're using the repo URL.
Where we do need raw links, we now use github.com/owner/repo/raw/*
because it looks a bit nicer and sorts better with non-raw links.
It must be sorted, because it will get re-sorted when
script/download-grammars is next run and that would clutter up diffs.
And it must not contain any duplicate scopes.
