Add support for deleting old tags as well

It might also be beneficial to get rid of old tags so add a new
`delete_tags` option for that which defaults to `false` to preserve
the existing behavior.

README.md

@@ -2,7 +2,7 @@
 # Delete Old Branches Action
 
 ## Introduction
-This simple GitHub Action will delete branches that haven't received a commit recently. The time since last commit is configurable
+This simple GitHub Action will delete branches and optionally tags that haven't received a commit recently. The time since last commit is configurable
 
 ## Disclaimer
 **Always** run the GitHub action in dry-run mode to ensure that it will do the right thing before you actually let it do it. Also make sure that you have a full copy of the repository (`git clone --mirror ...`) in case something goes bad
@@ -29,6 +29,7 @@ jobs:
           repo_token: ${{ github.token }}
           date: '3 months ago'
           dry_run: true
+          delete_tags: false
 ```
 Once you are happy switch, `dry_run` to `false` so the action actually does the job
 

action.yml

@@ -13,6 +13,10 @@ inputs:
     description: 'Run in dry-run mode so no branches are deleted'
     required: false
     default: true
+  delete_tags:
+    description: 'Also look for tags to delete'
+    required: false
+    default: false
 
 runs:
   using: 'docker'

delete-old-branches

@@ -10,6 +10,7 @@ REPO="${GITHUB_REPOSITORY}"
 DATE=${INPUT_DATE}
 GITHUB_TOKEN=${INPUT_REPO_TOKEN}
 DRY_RUN=${INPUT_DRY_RUN:-true}
+DELETE_TAGS=${INPUT_DELETE_TAGS:-false}
 
 branch_protected() {
     local br=${1}
@@ -26,13 +27,14 @@ branch_protected() {
     esac
 }
 
-delete_branch() {
-    local br=${1}
+delete_branch_or_tag() {
+    local br=${1} ref="heads"
+    [[ "${DELETE_TAGS}" == true ]] && ref="tags"
 
     echo "Deleting: ${br}"
     if [[ "${DRY_RUN}" == false ]]; then
         status=$(curl -X DELETE -o /dev/null -s -H "Authorization: Bearer ${GITHUB_TOKEN}" \
-                    -w "%{http_code}" "${BASE_URI}/repos/${REPO}/git/refs/heads/${br}")
+                    -w "%{http_code}" "${BASE_URI}/repos/${REPO}/git/refs/${ref}/${br}")
 
         case ${status} in
             204) ;;
@@ -49,9 +51,16 @@ main() {
     for br in $(git ls-remote -q --heads | sed "s@^.*heads/@@"); do
         if [[ -z "$(git log --oneline -1 --since="${DATE}" origin/"${br}")" ]]; then
             branch_protected "${br}" && echo "branch: ${br} is likely protected. Won't delete it" && continue
-            delete_branch "${br}"
+            delete_branch_or_tag "${br}"
         fi
     done
+    if [[ "${DELETE_TAGS}" == true ]]; then
+        for br in $(git ls-remote -q --tags | sed "s@^.*tags/@@"); do
+            if [[ -z "$(git log --oneline -1 --since="${DATE}" "${br}")" ]]; then
+                delete_branch_or_tag "${br}"
+            fi
+        done
+    fi
 }
 
 main "$@"