check if tag exists in the remote repo as well

entrypoint.sh

@@ -11,16 +11,25 @@ if [[ -z "${GITHUB_TOKEN}" ]]; then
    exit 1
 fi
 
-# check if tag already exists
+# get GitHub API endpoints prefix
+git_refs_url=$(jq .repository.git_refs_url $GITHUB_EVENT_PATH | tr -d '"' | sed 's/{\/sha}//g')
+
+# check if tag already exists in the cloned repo
 tag_exists="false"
 if [ $(git tag -l "$TAG") ]; then
     tag_exists="true"
-fi
+else
+  # check if tag exists in the remote repo
+  getReferenceStatus=$(curl "$git_refs_url/tags/$TAG" \
+  -H "Authorization: token $GITHUB_TOKEN" \
+  --write-out "%{http_code}" -s -o /dev/null)
 
-# push the tag to github
-git_refs_url=$(jq .repository.git_refs_url $GITHUB_EVENT_PATH | tr -d '"' | sed 's/{\/sha}//g')
+  if [ "$getReferenceStatus" = '200' ]; then
+    tag_exists="true"
+  fi
+fi
 
-echo "**pushing tag $tag to repo $GITHUB_REPOSITORY"
+echo "**pushing tag $TAG to repo $GITHUB_REPOSITORY"
 
 if $tag_exists
 then
@@ -36,7 +45,7 @@ then
 EOF
 else
   # create new tag
-  curl -s -X POST $git_refs_url \
+  curl -s -X POST "$git_refs_url" \
   -H "Authorization: token $GITHUB_TOKEN" \
   -d @- << EOF