#!/bin/bash -e

. /usr/share/gitlab-ci-common

# these are all required
! test -z "$CI_PROJECT_DIR"
! test -z "$CI_COMMIT_SHA"
! test -z "$CI_COMMIT_TAG"
! test -z "$CI_COMMIT_REF_NAME"

set -x

# delete any possible remnants from previous runs, except orig tarballs
find $(dirname $CI_PROJECT_DIR) -maxdepth 1 -type f -name '*-[0-9]*.*' -print -delete

$apt_get update

cd $CI_PROJECT_DIR
if dpkg --compare-versions `dpkg -s apt |sed -n 's,^Version: \(.*\),\1,p'` ge 1.1; then
    $apt_get -o APT::Get::Build-Dep-Automatic=yes build-dep $CI_PROJECT_DIR
else
    # this is running on an older version, like jessie-backports
    export BUILD_DEPENDS=`sed 's/\s*|[^,]*,/,/g' debian/control | perl -ne 'next if /^#/; $p=(s/^Build-Depends:\s*/ / or (/^ / and $p)); s/,|\n|\([^)]+\)//mg; print if $p'`
    $apt_get install --no-install-recommends \
             build-essential fakeroot git-buildpackage pristine-tar $BUILD_DEPENDS
fi
dpkg-checkbuilddeps
debversion=$(dpkg-parsechangelog -S Version)
if [[ $debversion = *-* ]]; then
  echo "ensure pristine-tar branch exists and is current"
  git clean -fdx
  git reset --hard
  git fetch --all
  git checkout -B pristine-tar origin/pristine-tar || ( \
      echo "no pristine-tar branch, trying uscan";
      apt_get_auto_install gnupg2 libwww-perl;
      uscan --verbose --download-current-version --force-download --rename --skip-signature;
  )
else
  echo "building native package version $debversion"
fi
echo "make $CI_COMMIT_REF_NAME branch current for gbp"
git checkout -B "$CI_COMMIT_REF_NAME" "$CI_COMMIT_SHA"
if [ -z "$CI_COMMIT_TAG" ]; then
    gbp buildpackage -uc -us --git-debian-branch="$CI_COMMIT_REF_NAME"
else
    gbp buildpackage -uc -us
fi