get-template-library: exclude all versions before 23.x

- Also add --all-versions to download all the available versions

src/scripts/get-template-library

@@ -70,7 +70,7 @@ monitoring_dest_dir=standard/monitoring
 # If a branch name matches one of the pattern, it will be ignored
 # HEAD added to workaround a bug in the release procedure when producing 14.5
 ignore_branch_patterns='\.obsolete$ ^HEAD$'
-ignore_version_patterns='13.1.[1-3] 13.[2-9] 13.12 14.[2-8]'
+ignore_version_patterns='^1[0-9]\..* ^2[0-2]\.*'
 template_lib_root=${TMPDIR:-/tmp}/quattor-template-library
 git_clone_root=${template_lib_root}/.gitrepos
 list_branches=0
@@ -85,6 +85,7 @@ usage () {
   echo ""
   echo "    Valid options are:"
   echo ""
+  echo "        --all-versions: download all available versions"
   echo "        --continuous-integration: use working copy contents instead of the GitHub repository"
   echo "        -d template_library_root: directory where to create the template library."
   echo "                      (D: ${template_lib_root})"
@@ -146,6 +147,10 @@ do
     usage
     ;;
 
+  --all-versions)
+    ignore_version_patterns="non existing version pattern"
+    ;;
+
   --pull-request)
     shift
     pull_request=$1