Add installing svn if needed

action.yml

@@ -14,7 +14,10 @@ inputs:
 runs:
   using: composite
   steps:
-    - run: INPUT_PANDOC=${{ inputs.pandoc }} $GITHUB_ACTION_PATH/setup-packager.sh
+    - run: $GITHUB_ACTION_PATH/setup-packager.sh
+      env:
+        INPUT_PANDOC: ${{ inputs.pandoc }}
+        INPUT_ARGS: ${{ inputs.args }}
       shell: bash
     - run: $GITHUB_ACTION_PATH/release.sh ${{ inputs.args }}
       shell: bash

setup-packager.sh

@@ -9,6 +9,40 @@ install_pandoc() {
 	fi
 }
 
+# Install subversion if the pkgmeta includes external svn repos
+install_subversion() {
+	command -v svn &>/dev/null && return 0
+
+	local pkgmeta_file
+	local OPTIND
+	while getopts ":m:" opt "$INPUT_ARGS"; do
+		case $opt in
+			m)
+				pkgmeta_file="${GITHUB_WORKSPACE}/${OPTARG}"
+				[[ ! -f "$pkgmeta_file" ]] && return 0
+				;;
+			*)
+		esac
+	done
+	if [[ -z "$pkgmeta_file" ]]; then
+		if [[ -f "${GITHUB_WORKSPACE}/.pkgmeta" ]]; then
+			pkgmeta_file="${GITHUB_WORKSPACE}/.pkgmeta"
+		elif [[ -f "${GITHUB_WORKSPACE}/pkgmeta.yaml" ]]; then
+			pkgmeta_file="${GITHUB_WORKSPACE}/pkgmeta.yaml"
+		else
+			return 0
+		fi
+	fi
+
+	# check type then url, exit 1 if no matches
+	if yq -e '.externals | ( (.[] | select(.type == "svn")) or (with_entries(.value |= .url) | .[] | select(test(".*/trunk(?:/|$)"))) )' < "$pkgmeta_file" &>/dev/null; then
+		# echo "::notice title=GitHub Actions Change::The runner image for ubuntu-latest is being updated to use ubuntu-24.04, which no longer includes subversion." \
+		#      "Update your workflow \"run-as\" to use ubuntu-22.04 directly or add a step to install subversion to continue support for svn repositories."
+	  sudo apt-get install -yq subversion &>/dev/null && echo -e "##[group]Install subversion\\n[command]svn --version\\n$( svn --version )\\n##[endgroup]"
+	fi
+}
+
 if [[ -n $GITHUB_ACTIONS ]]; then
 	install_pandoc
+	install_subversion
 fi