package=$(basename $(pwd))
ver="0.0.0" # set to the initial tag number

# Nuke all the debian branches from orbit
git branch -D pristine-tar debian/upstream debian/unstable-swh debian/stretch-swh || true

# Generate initial sdist tarball
git checkout v$ver
git clean -dfx

python3 setup.py egg_info
pname=$(awk '/^Name:/{print $2}' *.egg-info/PKG-INFO)
pver=$(awk '/^Version:/{print $2}' *.egg-info/PKG-INFO)

python3 setup.py sdist -d ../packages
mv ../packages/${pname}-${pver}.tar.gz ../packages/${package}_${ver}.orig.tar.gz

# Bootstrap the debian/upstream branch from the original tag
git checkout -b debian/upstream
# ... by removing all files
git ls-tree --name-only HEAD | xargs rm -r
# ...and replacing them with contents of the sdist
tar -x --strip-components 1 -f ../packages/${package}_${ver}.orig.tar.gz
git add .
git commit --no-verify -m "Import upstream version ${ver}"
# Create the upstream tag to appease gbp
git tag debian/upstream/$ver

# Bootstrap the pristine-tar branch ex-nihilo
git checkout --orphan pristine-tar
pristine-tar commit ../packages/${package}_${ver}.orig.tar.gz debian/upstream/${ver}

# Bootstrap the debian/unstable-swh branch from the debian/upstream branch
git checkout debian/upstream
git checkout -b debian/unstable-swh

# Initialize the debian directory.
# You can:
# - copy the debian directory from another repository
# - update all references to the other module
#    (notably in debian/changelog, debian/control, debian/rules, debian/copyright)
# - update dependencies in debian/control

git add debian
git commit -m "Bootstrap Debian packaging"

# This is a good point to test that the package builds with gbp buildpackage
# It might fail to build if your initial tag has no tests, as that makes pytest return an error code.

# Once the unstable package builds, fix up your bootstrap commit, then

# Bootstrap the debian/stretch-swh branch
git checkout debian/unstable-swh
git checkout -b debian/stretch-swh

sed -i s/unstable/stretch/ debian/gbp.conf
dch --bpo -D stretch-swh --force-distribution ''
git add debian
git commit --no-verify -m "Updated debian stretch backport directory for version ${ver}"

# Push all the things
git push --follow-tags --set-upstream origin pristine-tar debian/upstream debian/unstable-swh debian/stretch-swh