auto-run git-buildpackage setup for all gitlab-ci scripts

the script: section will be run after gbp completes

Dockerfile

@@ -25,3 +25,4 @@ COPY test /
 
 COPY gitlab-ci-git-buildpackage /
 
+ENTRYPOINT ["/gitlab-ci-git-buildpackage"]

gitlab-ci-git-buildpackage

@@ -5,6 +5,8 @@ set -x
 
 apt-get -qy update
 apt-get -qy dist-upgrade
+
+cd $CI_PROJECT_DIR
 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 -qy install --no-install-recommends \
         build-essential dpkg-dev fakeroot git-buildpackage pristine-tar $BUILD_DEPENDS
@@ -17,3 +19,5 @@ git branch --track pristine-tar origin/pristine-tar || true
 echo "make master branch current for gbp"
 git checkout -B "$CI_COMMIT_REF_NAME" "$CI_COMMIT_SHA"
 gbp buildpackage -us -uc
+
+exec "$@"