Add commit input to make it possible to use this action with third party PRs

README.md

@@ -40,6 +40,10 @@ In order to use this action, you will need to generate a JSON file using the fol
 
 **Optional** Ignore if the file which contains annotations is missing. Default: "true".
 
+### `commit`
+
+**Optional** Commit SHA to which annotations are published.
+
 ## Example usage
 
 ```yml

action.yml

@@ -23,6 +23,9 @@ inputs:
     description: 'Ignore if the file which contains annotations is missing'
     required: false
     default: 'true'
+  commit:
+    description: 'Commit SHA to which annotations are published.'
+    required: false
 runs:
   using: 'node16'
   main: 'dist/index.js'

index.js

@@ -139,9 +139,12 @@ async function run () {
     const title = getInput('title', { required: false })
 
     const octokit = getOctokit(repoToken)
+    const commitId = getInput('commit', { required: false }}
     const pullRequest = context.payload.pull_request
     let ref
-    if (pullRequest) {
+    if (commitId) {
+      ref = commitId
+    } else if (pullRequest) {
       ref = pullRequest.head.sha
     } else {
       ref = context.sha