importer.sh

#!/bin/bash

project="$1"
merge_version="$2"

if [ -z "$project" ]; then
  echo "Provide project name to import"
  echo "  $(basename $0) <project> [debian_merge_version]"
  exit 1
fi

set -xe

gbp clone git@salsa.debian.org:gnome-team/$project.git --postclone="git remote rename origin salsa"
cd $project

git remote add -f gnome git@gitlab.gnome.org:GNOME/$project.git
git remote add origin lp:~ubuntu-desktop/ubuntu/+source/$project
git config push.followTags true

if [ -z "$merge_version" ]; then
  apt-get changelog "$project=3.28.1-0ubuntu2" > "$project.changelog"

  for ((i = 0; ; i += 1)); do
    version="$(dpkg-parsechangelog -l "$project.changelog" -S Version -o $i -c 1)";

    if [[ "$version" =~ -[0-9]+ubuntu[0-9]+ ]]; then
      continue
    elif [[ "$version" =~ -[0-9]+$ ]]; then
      merge_version=$version
      echo "Last debian version found at $version (salsa tag is debian/${version/:/%})"
      break
    elif [ -z "$version" ]; then
      break;
    fi
  done

  rm -f "$project.changelog"

  if [ -z "$merge_version" ]; then
    echo "Impossible to find debian fork, please provide it as script parameter"
    exit 1
  fi
fi

# checkout to the latest debian merge and move as ubuntu/master
merge_tag=${merge_version/:/%}
git checkout -b ubuntu/master debian/$merge_tag

git remote add ubuntu-bzr "bzr::lp:~ubuntu-desktop/$project/ubuntu"
git fetch ubuntu-bzr
# for t in $(git tag -l '[0-9]*[0-9]ubuntu[0-9]*'); do git tag "ubuntu/$t" "$t"; git tag -d "$t"; done

while read -r line; do
  tag="$(echo "${line/:/%}" | sed -n "s,\([a-f0-9]\+\) releasing package $project version \(.*[0-9]\+ubuntu[0-9]\+.*\),\2 \1,p")"
  [ -n "$tag" ] && !git show-ref $tag &> /dev/null && git tag $tag
done < <(git log ubuntu-bzr/master --oneline)

for t in $(git tag --merged ubuntu-bzr/master); do git tag "ubuntu/$t" "$t"; git tag -d "$t"; done

git merge -s ours --no-commit ubuntu-bzr/master --allow-unrelated-histories
git rm -rf debian
git read-tree --prefix=/ -u ubuntu-bzr/master
git rm -rf .bzr*
git commit -m "Importing lp:~ubuntu-desktop/$project/ubuntu"
git gc --aggressive

# Since we want to import a dsc now, we need to remove the tag it already provides or gbp will complain
last_tag=$(git describe --tags --abbrev=0 ubuntu-bzr/master)
last_version="$(echo "${last_tag//%/:}" | cut -f2 -d/)"
git tag ubuntu/bzr-last-release "$last_tag"
git tag -d "$last_tag"

if [ -z "$last_version" ]; then
  echo "Now manually get last version version of $project source and continue with .dsc"
  git remote remove ubuntu-bzr
  exit $?
fi

dsc_file="../${project}_$(echo "$last_version" | sed "s,^[0-9]\+:,,").dsc"

if ! [ -e "$dsc_file" ]; then
  echo "No $dsc_file found, please download it"
  exit 1
fi

gbp import-dsc --debian-branch=ubuntu/master --debian-tag='ubuntu/%(version)s' "$dsc_file"

git remote remove ubuntu-bzr

cat << EOF > debian/gbp.conf
[DEFAULT]
debian-branch=ubuntu/master
upstream-branch=upstream/latest
debian-tag=ubuntu/%(version)s
upstream-vcs-tag=%(version)s
pristine-tar=True
EOF

# you might want to `git commit --amend`` now to remove the extra lines added to the changelog, but in that case you should update the last tag (ubuntu/3.28.1-0ubuntu2 in this example) to HEAD
# and `git gc --aggressive` as per git bzr usage.

# Set gbp.conf

### Importing upstream revision to ubuntu branch
# gbp import-orig --uscan
\