MDEV-28153: Debian autobake to generate control

Without doing the full build.

Autobake now includes a dependency on lsb-release.

As the BB CI images
(https://github.com/MariaDB/mariadb.org-tools/blob/master/buildbot.mariadb.org/ci_build_images/debian.Dockerfile)
have explicit dependencies, there's no point maintaining them in
two places. We don't want do the full autobake-deb.sh there, just enough
to have the control file containing the correct dependencies.

Helps: MariaDB/mariadb.org-tools#130

debian/autobake-deb.sh

@@ -30,9 +30,12 @@ then
   # build is not running on Travis or Gitlab-CI
   sed '/-DPLUGIN_COLUMNSTORE=NO/d' -i debian/rules
   # Take the files and part of control from MCS directory
-  cp -v storage/columnstore/columnstore/debian/mariadb-plugin-columnstore.* debian/
-  echo >> debian/control
-  cat storage/columnstore/columnstore/debian/control >> debian/control
+  if [ ! -f debian/mariadb-plugin-columnstore.install ]
+  then
+    cp -v storage/columnstore/columnstore/debian/mariadb-plugin-columnstore.* debian/
+    echo >> debian/control
+    cat storage/columnstore/columnstore/debian/control >> debian/control
+  fi
 fi
 
 # Look up distro-version specific stuff
@@ -91,6 +94,11 @@ case "${CODENAME}" in
     exit 1
 esac
 
+if [ -n "${AUTOBAKE_PREP_CONTROL_RULES_ONLY:-}" ]
+then
+  exit 0
+fi
+
 # Adjust changelog, add new version
 echo "Incrementing changelog and starting build scripts"
 

debian/salsa-ci.yml

@@ -34,7 +34,7 @@ build:
     - mv ${CCACHE_WORK_DIR} ${CCACHE_TMP_DIR}
     # Run Salsa-CI .build-script equivalent, with extra devscripts so autobake-deb.sh can run 'dch'
     - export CCACHE_DIR=${CCACHE_TMP_DIR}
-    - apt-get update && eatmydata apt-get install --no-install-recommends -y ccache fakeroot build-essential devscripts
+    - apt-get update && eatmydata apt-get install --no-install-recommends -y ccache fakeroot build-essential devscripts lsb-release
     - cd ${WORKING_DIR}/${SOURCE_DIR}
     - eatmydata apt-get build-dep --no-install-recommends -y .
     - update-ccache-symlinks; ccache -z # Zero out ccache counters