GHC: test binary blobs solution with libff-tarballs

binary-blobs-solution.sh

set -e
# ghc-tarballs contains big binary blobs. Windows developers really
# only need the latest version of it. One solution is to not use git,
# but just wget the files from some server.
# This is a git solution, which has the advantage that the full
# history of ghc-tarballs is tracked, while still only downloading
# the latest version initial. 


rm -rf testrepo*


# Create a repo and a submodule with update=none
mkdir testrepo
cd testrepo
git init -q
git submodule add -q file:////home/thomas/ghc-master/libffi-tarballs
git config -f .gitmodules submodule.libffi-tarballs.update none
git commit -q -a -m add
cd ../


# Clone it
git clone -q --recursive testrepo testrepo-clone


# Compare: because of update=none, testrepo-clone doesn't have libffi-tarballs
echo
du -hs testrepo*


# WINDOWS ONLY
cd testrepo-clone
git config submodule.libffi-tarballs.update checkout
git submodule update -q --depth=1
cd ../
# END WINDOWS ONLY


# Compare: because of depth=1, testrepo-clone is still smaller
echo
du -hs testrepo*