Delete messages matching the given regex

README.md

@@ -24,5 +24,6 @@ jobs:
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
         with:
           msg: "Check out this message!"
-          check_for_duplicate_msg: false  # OPTIONAL 
+          check_for_duplicate_msg: false  # OPTIONAL
+          delete_prev_regex_msg: "[0-9]"  # OPTIONAL
 ```

action.yml

@@ -12,9 +12,14 @@ inputs:
     description: If false, action doesn't check for duplicate msg.
     required: false
     default: true
+  delete_prev_regex_msg:
+    description: If not empty, all messages matching the given regex will be deleted.
+    required: false
+    default: nil
 runs:
   using: 'docker'
   image: 'Dockerfile'
   args:
     - ${{ inputs.msg }}
     - ${{ inputs.check_for_duplicate_msg }}
+    - ${{ inputs.delete_prev_regex_msg }}

entrypoint.sh

@@ -20,6 +20,7 @@ end
 
 message = ARGV[0]
 check_duplicate_msg = ARGV[1]
+delete_prev_regex_msg = ARGV[2]
 repo = event["repository"]["full_name"]
 
 if ENV.fetch("GITHUB_EVENT_NAME") == "pull_request"
@@ -48,4 +49,12 @@ if check_duplicate_msg == "true"
   end
 end
 
+ if delete_prev_regex_msg != nil
+  coms.each do |n|
+    if n["body"].match(/#{delete_prev_regex_msg}/)
+	github.delete_comment(repo, n["id"], opt = {})
+    end
+  end
+end
+
 github.add_comment(repo, pr_number, message)