separate script

action

@@ -0,0 +1,9 @@
+apt update
+apt install jq -y
+CURRENT_VERSION=$(jq -r .version package.json)
+PREVIOUS_VERSIONS=$(git tag -l)
+
+if [[ $PREVIOUS_VERSIONS =~ (^|[[:space:]])$CURRENT_VERSION($|[[:space:]]) ]]; then
+  git tag -a -m "Version $(CURRENT_VERSION)" $CURRENT_VERSION
+  git push --follow-tags
+fi

action.yaml

@@ -9,10 +9,4 @@ runs:
   using: composite
   steps:
     - run: Ensure apt is up-to-date
-      shell: apt update
-    - run: Get jq command
-      shell: apt install jq -y
-    - run: Get version from package.json
-      shell: export CURRENT_VERSION=$(jq -r .version package.json)
-    - run: Get tagged versions from git
-      shell: export PREVIOUS_VERSIONS=$(git tag -l)
+      shell: action